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Comparing Coro/Coro/State.xs (file contents):
Revision 1.100 by root, Mon Nov 27 00:07:49 2006 UTC vs.
Revision 1.383 by root, Sun Feb 13 04:39:16 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 (5,6,0)
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_restartop = 0;
1019#if PERL_VERSION_ATLEAST (5,10,0)
1020 PL_parser = 0;
1021#endif
1022 PL_hints = 0;
1023
1024 /* recreate the die/warn hooks */
1025 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1026 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1027
1028 GvSV (PL_defgv) = newSV (0);
1029 GvAV (PL_defgv) = coro->args; coro->args = 0;
1030 GvSV (PL_errgv) = newSV (0);
1031 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1032 GvHV (PL_hintgv) = 0;
1033 PL_rs = newSVsv (GvSV (irsgv));
1034 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1035
1036 {
1037 dSP;
1038 UNOP myop;
1039
1040 Zero (&myop, 1, UNOP);
1041 myop.op_next = Nullop;
1042 myop.op_type = OP_ENTERSUB;
1043 myop.op_flags = OPf_WANT_VOID;
1044
1045 PUSHMARK (SP);
1046 PUSHs ((SV *)coro->startcv);
1047 PUTBACK;
1048 PL_op = (OP *)&myop;
1049 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1050 }
1051
1052 /* this newly created coroutine might be run on an existing cctx which most
1053 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1054 */
1055 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1056 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1057
1058 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1059 init_perl_op.op_next = PL_op;
1060 init_perl_op.op_type = OP_ENTERSUB;
1061 init_perl_op.op_ppaddr = pp_slf;
1062 /* no flags etc. required, as an init function won't be called */
1063
1064 PL_op = (OP *)&init_perl_op;
1065
1066 /* copy throw, in case it was set before init_perl */
1067 CORO_THROW = coro->except;
1068
1069 SWAP_SVS (coro);
1070
1071 if (expect_false (enable_times))
1072 {
1073 coro_times_update ();
1074 coro_times_sub (coro);
1075 }
1076}
1077
1078static void
1079coro_unwind_stacks (pTHX)
1080{
1081 if (!IN_DESTRUCT)
1082 {
1083 /* restore all saved variables and stuff */
1084 LEAVE_SCOPE (0);
1085 assert (PL_tmps_floor == -1);
1086
1087 /* free all temporaries */
1088 FREETMPS;
1089 assert (PL_tmps_ix == -1);
1090
1091 /* unwind all extra stacks */
1092 POPSTACK_TO (PL_mainstack);
1093
1094 /* unwind main stack */
1095 dounwind (-1);
1096 }
1097}
1098
1099static void
1100destroy_perl (pTHX_ struct coro *coro)
1101{
1102 SV *svf [9];
1103
1104 {
1105 struct coro *current = SvSTATE_current;
1106
1107 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1108
1109 save_perl (aTHX_ current);
1110 load_perl (aTHX_ coro);
1111
1112 coro_unwind_stacks (aTHX);
1113 coro_destruct_stacks (aTHX);
1114
1115 /* restore swapped sv's */
1116 SWAP_SVS (coro);
1117
1118 // now save some sv's to be free'd later
1119 svf [0] = GvSV (PL_defgv);
1120 svf [1] = (SV *)GvAV (PL_defgv);
1121 svf [2] = GvSV (PL_errgv);
1122 svf [3] = (SV *)PL_defoutgv;
1123 svf [4] = PL_rs;
1124 svf [5] = GvSV (irsgv);
1125 svf [6] = (SV *)GvHV (PL_hintgv);
1126 svf [7] = PL_diehook;
1127 svf [8] = PL_warnhook;
1128 assert (9 == sizeof (svf) / sizeof (*svf));
1129
1130 load_perl (aTHX_ current);
1131 }
1132
1133 {
1134 unsigned int i;
1135
1136 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1137 SvREFCNT_dec (svf [i]);
1138
1139 SvREFCNT_dec (coro->saved_deffh);
1140 SvREFCNT_dec (coro->rouse_cb);
1141 SvREFCNT_dec (coro->invoke_cb);
1142 SvREFCNT_dec (coro->invoke_av);
1143 }
1144}
1145
1146INLINE void
1147free_coro_mortal (pTHX)
1148{
1149 if (expect_true (coro_mortal))
1150 {
1151 SvREFCNT_dec (coro_mortal);
1152 coro_mortal = 0;
1153 }
1154}
1155
1156static int
1157runops_trace (pTHX)
1158{
1159 COP *oldcop = 0;
1160 int oldcxix = -2;
1161
1162 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1163 {
1164 PERL_ASYNC_CHECK ();
1165
1166 if (cctx_current->flags & CC_TRACE_ALL)
1167 {
1168 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1169 {
1170 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1171 SV **bot, **top;
1172 AV *av = newAV (); /* return values */
1173 SV **cb;
1174 dSP;
1175
1176 GV *gv = CvGV (cx->blk_sub.cv);
1177 SV *fullname = sv_2mortal (newSV (0));
1178 if (isGV (gv))
1179 gv_efullname3 (fullname, gv, 0);
1180
1181 bot = PL_stack_base + cx->blk_oldsp + 1;
1182 top = cx->blk_gimme == G_ARRAY ? SP + 1
1183 : cx->blk_gimme == G_SCALAR ? bot + 1
1184 : bot;
1185
1186 av_extend (av, top - bot);
1187 while (bot < top)
1188 av_push (av, SvREFCNT_inc_NN (*bot++));
1189
1190 PL_runops = RUNOPS_DEFAULT;
1191 ENTER;
1192 SAVETMPS;
1193 EXTEND (SP, 3);
1194 PUSHMARK (SP);
1195 PUSHs (&PL_sv_no);
1196 PUSHs (fullname);
1197 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1198 PUTBACK;
1199 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1200 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1201 SPAGAIN;
1202 FREETMPS;
1203 LEAVE;
1204 PL_runops = runops_trace;
1205 }
1206
1207 if (oldcop != PL_curcop)
1208 {
1209 oldcop = PL_curcop;
1210
1211 if (PL_curcop != &PL_compiling)
1212 {
1213 SV **cb;
1214
1215 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1216 {
1217 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1218
1219 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1220 {
1221 dSP;
1222 GV *gv = CvGV (cx->blk_sub.cv);
1223 SV *fullname = sv_2mortal (newSV (0));
1224
1225 if (isGV (gv))
1226 gv_efullname3 (fullname, gv, 0);
1227
1228 PL_runops = RUNOPS_DEFAULT;
1229 ENTER;
1230 SAVETMPS;
1231 EXTEND (SP, 3);
1232 PUSHMARK (SP);
1233 PUSHs (&PL_sv_yes);
1234 PUSHs (fullname);
1235 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1236 PUTBACK;
1237 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1238 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1239 SPAGAIN;
1240 FREETMPS;
1241 LEAVE;
1242 PL_runops = runops_trace;
1243 }
1244
1245 oldcxix = cxstack_ix;
1246 }
1247
1248 if (cctx_current->flags & CC_TRACE_LINE)
1249 {
1250 dSP;
1251
1252 PL_runops = RUNOPS_DEFAULT;
1253 ENTER;
1254 SAVETMPS;
1255 EXTEND (SP, 3);
1256 PL_runops = RUNOPS_DEFAULT;
1257 PUSHMARK (SP);
1258 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1259 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1260 PUTBACK;
1261 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1262 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1263 SPAGAIN;
1264 FREETMPS;
1265 LEAVE;
1266 PL_runops = runops_trace;
1267 }
1268 }
1269 }
1270 }
1271 }
1272
1273 TAINT_NOT;
1274 return 0;
1275}
1276
1277static struct CoroSLF cctx_ssl_frame;
1278
1279static void
1280slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1281{
1282 ta->prev = 0;
1283}
1284
1285static int
1286slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1287{
1288 *frame = cctx_ssl_frame;
1289
1290 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1291}
1292
1293/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1294static void NOINLINE
1295cctx_prepare (pTHX)
1296{
1297 PL_top_env = &PL_start_env;
1298
1299 if (cctx_current->flags & CC_TRACE)
1300 PL_runops = runops_trace;
1301
1302 /* we already must be executing an SLF op, there is no other valid way
1303 * that can lead to creation of a new cctx */
1304 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1305 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1306
1307 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1308 cctx_ssl_frame = slf_frame;
1309
1310 slf_frame.prepare = slf_prepare_set_stacklevel;
1311 slf_frame.check = slf_check_set_stacklevel;
1312}
1313
1314/* the tail of transfer: execute stuff we can only do after a transfer */
1315INLINE void
1316transfer_tail (pTHX)
1317{
1318 free_coro_mortal (aTHX);
1319}
1320
1321/*
1322 * this is a _very_ stripped down perl interpreter ;)
1323 */
1324static void
1325cctx_run (void *arg)
1326{
1327#ifdef USE_ITHREADS
1328# if CORO_PTHREAD
1329 PERL_SET_CONTEXT (coro_thx);
1330# endif
1331#endif
1332 {
1333 dTHX;
1334
1335 /* normally we would need to skip the entersub here */
1336 /* not doing so will re-execute it, which is exactly what we want */
1337 /* PL_nop = PL_nop->op_next */
1338
1339 /* inject a fake subroutine call to cctx_init */
1340 cctx_prepare (aTHX);
1341
1342 /* cctx_run is the alternative tail of transfer() */
1343 transfer_tail (aTHX);
1344
1345 /* somebody or something will hit me for both perl_run and PL_restartop */
1346 PL_restartop = PL_op;
1347 perl_run (PL_curinterp);
1348 /*
1349 * Unfortunately, there is no way to get at the return values of the
1350 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1351 * runtime errors here, as this is just a random interpreter, not a thread.
1352 */
1353
1354 /*
1355 * If perl-run returns we assume exit() was being called or the coro
1356 * fell off the end, which seems to be the only valid (non-bug)
1357 * reason for perl_run to return. We try to exit by jumping to the
1358 * bootstrap-time "top" top_env, as we cannot restore the "main"
1359 * coroutine as Coro has no such concept.
1360 * This actually isn't valid with the pthread backend, but OSes requiring
1361 * that backend are too broken to do it in a standards-compliant way.
1362 */
1363 PL_top_env = main_top_env;
1364 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1365 }
1366}
1367
1368static coro_cctx *
1369cctx_new ()
1370{
1371 coro_cctx *cctx;
1372
1373 ++cctx_count;
1374 New (0, cctx, 1, coro_cctx);
1375
1376 cctx->gen = cctx_gen;
1377 cctx->flags = 0;
1378 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1379
1380 return cctx;
1381}
1382
1383/* create a new cctx only suitable as source */
1384static coro_cctx *
1385cctx_new_empty ()
1386{
1387 coro_cctx *cctx = cctx_new ();
1388
1389 cctx->sptr = 0;
1390 coro_create (&cctx->cctx, 0, 0, 0, 0);
1391
1392 return cctx;
1393}
1394
1395/* create a new cctx suitable as destination/running a perl interpreter */
1396static coro_cctx *
1397cctx_new_run ()
1398{
1399 coro_cctx *cctx = cctx_new ();
1400 void *stack_start;
1401 size_t stack_size;
1402
1403#if HAVE_MMAP
1404 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1405 /* mmap supposedly does allocate-on-write for us */
1406 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1407
1408 if (cctx->sptr != (void *)-1)
1409 {
1410 #if CORO_STACKGUARD
1411 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1412 #endif
1413 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1414 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1415 cctx->flags |= CC_MAPPED;
1416 }
1417 else
1418#endif
1419 {
1420 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1421 New (0, cctx->sptr, cctx_stacksize, long);
1422
1423 if (!cctx->sptr)
1424 {
1425 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1426 _exit (EXIT_FAILURE);
1427 }
1428
1429 stack_start = cctx->sptr;
1430 stack_size = cctx->ssize;
1431 }
1432
1433 #if CORO_USE_VALGRIND
1434 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1435 #endif
1436
1437 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1438
1439 return cctx;
1440}
1441
1442static void
1443cctx_destroy (coro_cctx *cctx)
1444{
1445 if (!cctx)
1446 return;
1447
1448 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1449
1450 --cctx_count;
1451 coro_destroy (&cctx->cctx);
1452
1453 /* coro_transfer creates new, empty cctx's */
1454 if (cctx->sptr)
1455 {
1456 #if CORO_USE_VALGRIND
1457 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1458 #endif
1459
1460#if HAVE_MMAP
1461 if (cctx->flags & CC_MAPPED)
1462 munmap (cctx->sptr, cctx->ssize);
1463 else
1464#endif
1465 Safefree (cctx->sptr);
1466 }
1467
1468 Safefree (cctx);
1469}
1470
1471/* wether this cctx should be destructed */
1472#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1473
1474static coro_cctx *
1475cctx_get (pTHX)
1476{
1477 while (expect_true (cctx_first))
1478 {
1479 coro_cctx *cctx = cctx_first;
1480 cctx_first = cctx->next;
1481 --cctx_idle;
1482
1483 if (expect_true (!CCTX_EXPIRED (cctx)))
1484 return cctx;
1485
1486 cctx_destroy (cctx);
1487 }
1488
1489 return cctx_new_run ();
1490}
1491
1492static void
1493cctx_put (coro_cctx *cctx)
1494{
1495 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1496
1497 /* free another cctx if overlimit */
1498 if (expect_false (cctx_idle >= cctx_max_idle))
1499 {
1500 coro_cctx *first = cctx_first;
1501 cctx_first = first->next;
1502 --cctx_idle;
1503
1504 cctx_destroy (first);
1505 }
1506
1507 ++cctx_idle;
1508 cctx->next = cctx_first;
1509 cctx_first = cctx;
1510}
1511
1512/** coroutine switching *****************************************************/
1513
1514static void
1515transfer_check (pTHX_ struct coro *prev, struct coro *next)
1516{
1517 /* TODO: throwing up here is considered harmful */
1518
1519 if (expect_true (prev != next))
1520 {
1521 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1522 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1523
1524 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1525 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1526
1527#if !PERL_VERSION_ATLEAST (5,10,0)
1528 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1529 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1530#endif
1531 }
1532}
1533
1534/* always use the TRANSFER macro */
1535static void NOINLINE /* noinline so we have a fixed stackframe */
1536transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1537{
1538 dSTACKLEVEL;
1539
1540 /* sometimes transfer is only called to set idle_sp */
1541 if (expect_false (!prev))
1542 {
1543 cctx_current->idle_sp = STACKLEVEL;
1544 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1545 }
1546 else if (expect_true (prev != next))
1547 {
1548 coro_cctx *cctx_prev;
1549
1550 if (expect_false (prev->flags & CF_NEW))
1551 {
1552 /* create a new empty/source context */
1553 prev->flags &= ~CF_NEW;
1554 prev->flags |= CF_RUNNING;
1555 }
1556
1557 prev->flags &= ~CF_RUNNING;
1558 next->flags |= CF_RUNNING;
1559
1560 /* first get rid of the old state */
1561 save_perl (aTHX_ prev);
1562
1563 if (expect_false (next->flags & CF_NEW))
1564 {
1565 /* need to start coroutine */
1566 next->flags &= ~CF_NEW;
1567 /* setup coroutine call */
1568 init_perl (aTHX_ next);
1569 }
1570 else
1571 load_perl (aTHX_ next);
1572
1573 /* possibly untie and reuse the cctx */
1574 if (expect_true (
1575 cctx_current->idle_sp == STACKLEVEL
1576 && !(cctx_current->flags & CC_TRACE)
1577 && !force_cctx
1578 ))
1579 {
1580 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1581 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1582
1583 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1584 /* without this the next cctx_get might destroy the running cctx while still in use */
1585 if (expect_false (CCTX_EXPIRED (cctx_current)))
1586 if (expect_true (!next->cctx))
1587 next->cctx = cctx_get (aTHX);
1588
1589 cctx_put (cctx_current);
1590 }
1591 else
1592 prev->cctx = cctx_current;
1593
1594 ++next->usecount;
1595
1596 cctx_prev = cctx_current;
1597 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1598
1599 next->cctx = 0;
1600
1601 if (expect_false (cctx_prev != cctx_current))
1602 {
1603 cctx_prev->top_env = PL_top_env;
1604 PL_top_env = cctx_current->top_env;
1605 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1606 }
1607
1608 transfer_tail (aTHX);
1609 }
1610}
1611
1612#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1613#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1614
1615/** high level stuff ********************************************************/
1616
1617static int
1618coro_state_destroy (pTHX_ struct coro *coro)
1619{
1620 if (coro->flags & CF_DESTROYED)
1621 return 0;
1622
1623 if (coro->on_destroy && !PL_dirty)
1624 coro->on_destroy (aTHX_ coro);
1625
1626 coro->flags |= CF_DESTROYED;
1627
1628 if (coro->flags & CF_READY)
1629 {
1630 /* reduce nready, as destroying a ready coro effectively unreadies it */
1631 /* alternative: look through all ready queues and remove the coro */
1632 --coro_nready;
1633 }
1634 else
1635 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1636
1637 if (coro->mainstack
1638 && coro->mainstack != main_mainstack
1639 && coro->slot
1640 && !PL_dirty)
1641 destroy_perl (aTHX_ coro);
1642
1643 if (coro->next) coro->next->prev = coro->prev;
1644 if (coro->prev) coro->prev->next = coro->next;
1645 if (coro == coro_first) coro_first = coro->next;
1646
1647 cctx_destroy (coro->cctx);
1648 SvREFCNT_dec (coro->startcv);
1649 SvREFCNT_dec (coro->args);
1650 SvREFCNT_dec (coro->swap_sv);
1651 SvREFCNT_dec (CORO_THROW);
1652
1653 return 1;
1654}
1655
1656static int
1657coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1658{
1659 struct coro *coro = (struct coro *)mg->mg_ptr;
1660 mg->mg_ptr = 0;
1661
1662 coro->hv = 0;
1663
1664 if (--coro->refcnt < 0)
1665 {
1666 coro_state_destroy (aTHX_ coro);
1667 Safefree (coro);
1668 }
1669
1670 return 0;
1671}
1672
1673static int
1674coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1675{
1676 struct coro *coro = (struct coro *)mg->mg_ptr;
1677
1678 ++coro->refcnt;
1679
1680 return 0;
1681}
1682
1683static MGVTBL coro_state_vtbl = {
1684 0, 0, 0, 0,
1685 coro_state_free,
1686 0,
1687#ifdef MGf_DUP
1688 coro_state_dup,
1689#else
1690# define MGf_DUP 0
1691#endif
1692};
1693
1694static void
1695prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1696{
1697 ta->prev = SvSTATE (prev_sv);
1698 ta->next = SvSTATE (next_sv);
1699 TRANSFER_CHECK (*ta);
1700}
1701
1702static void
1703api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1704{
1705 struct coro_transfer_args ta;
1706
1707 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1708 TRANSFER (ta, 1);
1709}
1710
1711/** Coro ********************************************************************/
1712
1713INLINE void
1714coro_enq (pTHX_ struct coro *coro)
1715{
1716 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1717
1718 SvREFCNT_inc_NN (coro->hv);
1719
1720 coro->next_ready = 0;
1721 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1722 ready [1] = coro;
1723}
1724
1725INLINE struct coro *
1726coro_deq (pTHX)
1727{
1728 int prio;
1729
1730 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1731 {
1732 struct coro **ready = coro_ready [prio];
1733
1734 if (ready [0])
1735 {
1736 struct coro *coro = ready [0];
1737 ready [0] = coro->next_ready;
1738 return coro;
1739 }
1740 }
1741
1742 return 0;
1743}
1744
1745static void
1746invoke_sv_ready_hook_helper (void)
1747{
548 dTHX; 1748 dTHX;
549 dSP; 1749 dSP;
550 UNOP myop;
551 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
552 1750
553 coro_init_stacks (); 1751 ENTER;
554 /*PL_curcop = 0;*/ 1752 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 1753
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); 1754 PUSHMARK (SP);
568 XPUSHs (sub_init);
569 PUTBACK; 1755 PUTBACK;
570 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1756 call_sv (coro_readyhook, G_VOID | G_DISCARD);
571 SPAGAIN;
572 1757
573 ENTER; /* necessary e.g. for dounwind */ 1758 FREETMPS;
1759 LEAVE;
574} 1760}
575 1761
576static void 1762static int
577free_coro_mortal () 1763api_ready (pTHX_ SV *coro_sv)
578{ 1764{
579 if (coro_mortal) 1765 struct coro *coro = SvSTATE (coro_sv);
580 {
581 SvREFCNT_dec (coro_mortal);
582 coro_mortal = 0;
583 }
584}
585 1766
586static void NOINLINE 1767 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; 1768 return 0;
669 1769
670#if HAVE_MMAP 1770 coro->flags |= CF_READY;
671 munmap (stack->sptr, stack->ssize);
672#else
673 Safefree (stack->sptr);
674#endif
675 1771
676 Safefree (stack); 1772 coro_enq (aTHX_ coro);
677}
678 1773
679static coro_stack *stack_first; 1774 if (!coro_nready++)
1775 if (coroapi.readyhook)
1776 coroapi.readyhook ();
680 1777
681static coro_stack * 1778 return 1;
682stack_get () 1779}
683{
684 coro_stack *stack;
685 1780
686 if (stack_first) 1781static int
687 { 1782api_is_ready (pTHX_ SV *coro_sv)
688 stack = stack_first; 1783{
689 stack_first = stack->next; 1784 return !!(SvSTATE (coro_sv)->flags & CF_READY);
690 } 1785}
691 else 1786
1787/* expects to own a reference to next->hv */
1788INLINE void
1789prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1790{
1791 SV *prev_sv = SvRV (coro_current);
1792
1793 ta->prev = SvSTATE_hv (prev_sv);
1794 ta->next = next;
1795
1796 TRANSFER_CHECK (*ta);
1797
1798 SvRV_set (coro_current, (SV *)next->hv);
1799
1800 free_coro_mortal (aTHX);
1801 coro_mortal = prev_sv;
1802}
1803
1804static void
1805prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1806{
1807 for (;;)
692 { 1808 {
693 stack = stack_new (); 1809 struct coro *next = coro_deq (aTHX);
694 PL_op = PL_op->op_next;
695 }
696 1810
697 return stack; 1811 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 { 1812 {
724 /* coroutine already started */ 1813 /* cannot transfer to destroyed coros, skip and look for next */
725 SAVE (prev, flags); 1814 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
726 LOAD (next); 1815 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1816 else
1817 {
1818 next->flags &= ~CF_READY;
1819 --coro_nready;
1820
1821 prepare_schedule_to (aTHX_ ta, next);
1822 break;
1823 }
727 } 1824 }
728 else 1825 else
729 { 1826 {
730 /* need to start coroutine */ 1827 /* nothing to schedule: call the idle handler */
731 /* first get rid of the old state */ 1828 if (SvROK (sv_idle)
732 SAVE (prev, -1); 1829 && SvOBJECT (SvRV (sv_idle)))
733 /* setup coroutine call */ 1830 {
734 setup_coro (next); 1831 if (SvRV (sv_idle) == SvRV (coro_current))
735 /* need a stack */ 1832 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
736 next->stack = 0; 1833
1834 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1835 api_ready (aTHX_ SvRV (sv_idle));
1836 --coro_nready;
1837 }
1838 else
1839 {
1840 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1841 dSP;
1842
1843 ENTER;
1844 SAVETMPS;
1845
1846 PUSHMARK (SP);
1847 PUTBACK;
1848 call_sv (sv_idle, G_VOID | G_DISCARD);
1849
1850 FREETMPS;
1851 LEAVE;
1852 }
737 } 1853 }
1854 }
1855}
738 1856
739 if (!prev->stack) 1857INLINE void
740 /* create a new empty context */ 1858prepare_cede (pTHX_ struct coro_transfer_args *ta)
741 Newz (0, prev->stack, 1, coro_stack); 1859{
1860 api_ready (aTHX_ coro_current);
1861 prepare_schedule (aTHX_ ta);
1862}
742 1863
743 prev__stack = prev->stack; 1864INLINE void
1865prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1866{
1867 SV *prev = SvRV (coro_current);
744 1868
745 /* possibly "free" the stack */ 1869 if (coro_nready)
746 if (prev__stack->idle_sp == STACKLEVEL) 1870 {
1871 prepare_schedule (aTHX_ ta);
1872 api_ready (aTHX_ prev);
1873 }
1874 else
1875 prepare_nop (aTHX_ ta);
1876}
1877
1878static void
1879api_schedule (pTHX)
1880{
1881 struct coro_transfer_args ta;
1882
1883 prepare_schedule (aTHX_ &ta);
1884 TRANSFER (ta, 1);
1885}
1886
1887static void
1888api_schedule_to (pTHX_ SV *coro_sv)
1889{
1890 struct coro_transfer_args ta;
1891 struct coro *next = SvSTATE (coro_sv);
1892
1893 SvREFCNT_inc_NN (coro_sv);
1894 prepare_schedule_to (aTHX_ &ta, next);
1895}
1896
1897static int
1898api_cede (pTHX)
1899{
1900 struct coro_transfer_args ta;
1901
1902 prepare_cede (aTHX_ &ta);
1903
1904 if (expect_true (ta.prev != ta.next))
1905 {
1906 TRANSFER (ta, 1);
1907 return 1;
1908 }
1909 else
1910 return 0;
1911}
1912
1913static int
1914api_cede_notself (pTHX)
1915{
1916 if (coro_nready)
1917 {
1918 struct coro_transfer_args ta;
1919
1920 prepare_cede_notself (aTHX_ &ta);
1921 TRANSFER (ta, 1);
1922 return 1;
1923 }
1924 else
1925 return 0;
1926}
1927
1928static void
1929api_trace (pTHX_ SV *coro_sv, int flags)
1930{
1931 struct coro *coro = SvSTATE (coro_sv);
1932
1933 if (coro->flags & CF_RUNNING)
1934 croak ("cannot enable tracing on a running coroutine, caught");
1935
1936 if (flags & CC_TRACE)
1937 {
1938 if (!coro->cctx)
1939 coro->cctx = cctx_new_run ();
1940 else if (!(coro->cctx->flags & CC_TRACE))
1941 croak ("cannot enable tracing on coroutine with custom stack, caught");
1942
1943 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1944 }
1945 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1946 {
1947 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1948
1949 if (coro->flags & CF_RUNNING)
1950 PL_runops = RUNOPS_DEFAULT;
1951 else
1952 coro->slot->runops = RUNOPS_DEFAULT;
1953 }
1954}
1955
1956static void
1957coro_call_on_destroy (pTHX_ struct coro *coro)
1958{
1959 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1960 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1961
1962 if (on_destroyp)
1963 {
1964 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1965
1966 while (AvFILLp (on_destroy) >= 0)
747 { 1967 {
748 stack_put (prev__stack); 1968 dSP; /* don't disturb outer sp */
749 prev->stack = 0; 1969 SV *cb = av_pop (on_destroy);
1970
1971 PUSHMARK (SP);
1972
1973 if (statusp)
1974 {
1975 int i;
1976 AV *status = (AV *)SvRV (*statusp);
1977 EXTEND (SP, AvFILLp (status) + 1);
1978
1979 for (i = 0; i <= AvFILLp (status); ++i)
1980 PUSHs (AvARRAY (status)[i]);
1981 }
1982
1983 PUTBACK;
1984 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
750 } 1985 }
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 { 1986 }
784 struct coro temp; 1987}
785 1988
786 SAVE ((&temp), TRANSFER_SAVE_ALL); 1989static void
787 LOAD (coro); 1990slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1991{
1992 int i;
1993 HV *hv = (HV *)SvRV (coro_current);
1994 AV *av = newAV ();
788 1995
789 destroy_stacks (); 1996 /* items are actually not so common, so optimise for this case */
790 1997 if (items)
791 LOAD ((&temp)); /* this will get rid of defsv etc.. */
792
793 coro->mainstack = 0;
794 } 1998 {
1999 av_extend (av, items - 1);
795 2000
796 stack_free (coro->stack); 2001 for (i = 0; i < items; ++i)
797 SvREFCNT_dec (coro->args); 2002 av_push (av, SvREFCNT_inc_NN (arg [i]));
798 Safefree (coro); 2003 }
2004
2005 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2006
2007 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2008 api_ready (aTHX_ sv_manager);
2009
2010 frame->prepare = prepare_schedule;
2011 frame->check = slf_check_repeat;
2012
2013 /* as a minor optimisation, we could unwind all stacks here */
2014 /* but that puts extra pressure on pp_slf, and is not worth much */
2015 /*coro_unwind_stacks (aTHX);*/
799} 2016}
2017
2018/*****************************************************************************/
2019/* async pool handler */
800 2020
801static int 2021static int
802coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 2022slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
803{ 2023{
2024 HV *hv = (HV *)SvRV (coro_current);
804 struct coro *coro = (struct coro *)mg->mg_ptr; 2025 struct coro *coro = (struct coro *)frame->data;
805 mg->mg_ptr = 0;
806 2026
807 coro_state_destroy (coro); 2027 if (!coro->invoke_cb)
808 2028 return 1; /* loop till we have invoke */
809 return 0; 2029 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 { 2030 {
911 coro_nready--; 2031 hv_store (hv, "desc", sizeof ("desc") - 1,
912 return av_shift (coro_ready [prio]); 2032 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
913 }
914 2033
915 return 0; 2034 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 2035
947 { 2036 {
948 dSP; 2037 dSP;
949 2038 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
950 ENTER;
951 SAVETMPS;
952
953 PUSHMARK (SP);
954 PUTBACK; 2039 PUTBACK;
955 call_sv (GvSV (coro_idle), G_DISCARD);
956
957 FREETMPS;
958 LEAVE;
959 } 2040 }
2041
2042 SvREFCNT_dec (GvAV (PL_defgv));
2043 GvAV (PL_defgv) = coro->invoke_av;
2044 coro->invoke_av = 0;
2045
2046 return 0;
2047 }
2048}
2049
2050static void
2051slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2052{
2053 HV *hv = (HV *)SvRV (coro_current);
2054 struct coro *coro = SvSTATE_hv ((SV *)hv);
2055
2056 if (expect_true (coro->saved_deffh))
960 } 2057 {
2058 /* subsequent iteration */
2059 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2060 coro->saved_deffh = 0;
961 2061
962 prev = SvRV (current); 2062 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
963 SvRV (current) = next; 2063 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2064 {
2065 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2066 coro->invoke_av = newAV ();
964 2067
965 /* free this only after the transfer */ 2068 frame->prepare = prepare_nop;
966 LOCK; 2069 }
967 free_coro_mortal (); 2070 else
968 UNLOCK; 2071 {
969 coro_mortal = prev; 2072 av_clear (GvAV (PL_defgv));
2073 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
970 2074
971 ta->prev = SvSTATE (prev); 2075 coro->prio = 0;
972 ta->next = SvSTATE (next);
973 ta->flags = TRANSFER_SAVE_ALL;
974}
975 2076
2077 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2078 api_trace (aTHX_ coro_current, 0);
2079
2080 frame->prepare = prepare_schedule;
2081 av_push (av_async_pool, SvREFCNT_inc (hv));
2082 }
2083 }
2084 else
2085 {
2086 /* first iteration, simply fall through */
2087 frame->prepare = prepare_nop;
2088 }
2089
2090 frame->check = slf_check_pool_handler;
2091 frame->data = (void *)coro;
2092}
2093
2094/*****************************************************************************/
2095/* rouse callback */
2096
2097#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2098
2099static void
2100coro_rouse_callback (pTHX_ CV *cv)
2101{
2102 dXSARGS;
2103 SV *data = (SV *)S_GENSUB_ARG;
2104
2105 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2106 {
2107 /* first call, set args */
2108 SV *coro = SvRV (data);
2109 AV *av = newAV ();
2110
2111 SvRV_set (data, (SV *)av);
2112
2113 /* better take a full copy of the arguments */
2114 while (items--)
2115 av_store (av, items, newSVsv (ST (items)));
2116
2117 api_ready (aTHX_ coro);
2118 SvREFCNT_dec (coro);
2119 }
2120
2121 XSRETURN_EMPTY;
2122}
2123
976static void 2124static int
2125slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2126{
2127 SV *data = (SV *)frame->data;
2128
2129 if (CORO_THROW)
2130 return 0;
2131
2132 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2133 return 1;
2134
2135 /* now push all results on the stack */
2136 {
2137 dSP;
2138 AV *av = (AV *)SvRV (data);
2139 int i;
2140
2141 EXTEND (SP, AvFILLp (av) + 1);
2142 for (i = 0; i <= AvFILLp (av); ++i)
2143 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2144
2145 /* we have stolen the elements, so set length to zero and free */
2146 AvFILLp (av) = -1;
2147 av_undef (av);
2148
2149 PUTBACK;
2150 }
2151
2152 return 0;
2153}
2154
2155static void
2156slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2157{
2158 SV *cb;
2159
2160 if (items)
2161 cb = arg [0];
2162 else
2163 {
2164 struct coro *coro = SvSTATE_current;
2165
2166 if (!coro->rouse_cb)
2167 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2168
2169 cb = sv_2mortal (coro->rouse_cb);
2170 coro->rouse_cb = 0;
2171 }
2172
2173 if (!SvROK (cb)
2174 || SvTYPE (SvRV (cb)) != SVt_PVCV
2175 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2176 croak ("Coro::rouse_wait called with illegal callback argument,");
2177
2178 {
2179 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2180 SV *data = (SV *)S_GENSUB_ARG;
2181
2182 frame->data = (void *)data;
2183 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2184 frame->check = slf_check_rouse_wait;
2185 }
2186}
2187
2188static SV *
2189coro_new_rouse_cb (pTHX)
2190{
2191 HV *hv = (HV *)SvRV (coro_current);
2192 struct coro *coro = SvSTATE_hv (hv);
2193 SV *data = newRV_inc ((SV *)hv);
2194 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2195
2196 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2197 SvREFCNT_dec (data); /* magicext increases the refcount */
2198
2199 SvREFCNT_dec (coro->rouse_cb);
2200 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2201
2202 return cb;
2203}
2204
2205/*****************************************************************************/
2206/* schedule-like-function opcode (SLF) */
2207
2208static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2209static const CV *slf_cv;
2210static SV **slf_argv;
2211static int slf_argc, slf_arga; /* count, allocated */
2212static I32 slf_ax; /* top of stack, for restore */
2213
2214/* this restores the stack in the case we patched the entersub, to */
2215/* recreate the stack frame as perl will on following calls */
2216/* since entersub cleared the stack */
2217static OP *
2218pp_restore (pTHX)
2219{
2220 int i;
2221 SV **SP = PL_stack_base + slf_ax;
2222
2223 PUSHMARK (SP);
2224
2225 EXTEND (SP, slf_argc + 1);
2226
2227 for (i = 0; i < slf_argc; ++i)
2228 PUSHs (sv_2mortal (slf_argv [i]));
2229
2230 PUSHs ((SV *)CvGV (slf_cv));
2231
2232 RETURNOP (slf_restore.op_first);
2233}
2234
2235static void
2236slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2237{
2238 SV **arg = (SV **)slf_frame.data;
2239
2240 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2241}
2242
2243static void
2244slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2245{
2246 if (items != 2)
2247 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2248
2249 frame->prepare = slf_prepare_transfer;
2250 frame->check = slf_check_nop;
2251 frame->data = (void *)arg; /* let's hope it will stay valid */
2252}
2253
2254static void
2255slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2256{
2257 frame->prepare = prepare_schedule;
2258 frame->check = slf_check_nop;
2259}
2260
2261static void
977prepare_cede (struct transfer_args *ta) 2262slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
978{ 2263{
979 LOCK; 2264 struct coro *next = (struct coro *)slf_frame.data;
980 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
981 UNLOCK;
982 2265
2266 SvREFCNT_inc_NN (next->hv);
983 prepare_schedule (ta); 2267 prepare_schedule_to (aTHX_ ta, next);
984} 2268}
985 2269
986static void 2270static void
987api_schedule (void) 2271slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
988{ 2272{
989 dTHX; 2273 if (!items)
2274 croak ("Coro::schedule_to expects a coroutine argument, caught");
2275
2276 frame->data = (void *)SvSTATE (arg [0]);
2277 frame->prepare = slf_prepare_schedule_to;
2278 frame->check = slf_check_nop;
2279}
2280
2281static void
2282slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2283{
2284 api_ready (aTHX_ SvRV (coro_current));
2285
2286 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2287}
2288
2289static void
2290slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2291{
2292 frame->prepare = prepare_cede;
2293 frame->check = slf_check_nop;
2294}
2295
2296static void
2297slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2298{
2299 frame->prepare = prepare_cede_notself;
2300 frame->check = slf_check_nop;
2301}
2302
2303/*
2304 * these not obviously related functions are all rolled into one
2305 * function to increase chances that they all will call transfer with the same
2306 * stack offset
2307 * SLF stands for "schedule-like-function".
2308 */
2309static OP *
2310pp_slf (pTHX)
2311{
2312 I32 checkmark; /* mark SP to see how many elements check has pushed */
2313
2314 /* set up the slf frame, unless it has already been set-up */
2315 /* the latter happens when a new coro has been started */
2316 /* or when a new cctx was attached to an existing coroutine */
2317 if (expect_true (!slf_frame.prepare))
2318 {
2319 /* first iteration */
2320 dSP;
2321 SV **arg = PL_stack_base + TOPMARK + 1;
2322 int items = SP - arg; /* args without function object */
2323 SV *gv = *sp;
2324
2325 /* do a quick consistency check on the "function" object, and if it isn't */
2326 /* for us, divert to the real entersub */
2327 if (SvTYPE (gv) != SVt_PVGV
2328 || !GvCV (gv)
2329 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2330 return PL_ppaddr[OP_ENTERSUB](aTHX);
2331
2332 if (!(PL_op->op_flags & OPf_STACKED))
2333 {
2334 /* ampersand-form of call, use @_ instead of stack */
2335 AV *av = GvAV (PL_defgv);
2336 arg = AvARRAY (av);
2337 items = AvFILLp (av) + 1;
2338 }
2339
2340 /* now call the init function, which needs to set up slf_frame */
2341 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2342 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2343
2344 /* pop args */
2345 SP = PL_stack_base + POPMARK;
2346
2347 PUTBACK;
2348 }
2349
2350 /* now that we have a slf_frame, interpret it! */
2351 /* we use a callback system not to make the code needlessly */
2352 /* complicated, but so we can run multiple perl coros from one cctx */
2353
2354 do
2355 {
990 struct transfer_args ta; 2356 struct coro_transfer_args ta;
991 2357
992 prepare_schedule (&ta); 2358 slf_frame.prepare (aTHX_ &ta);
993 TRANSFER (ta); 2359 TRANSFER (ta, 0);
994}
995 2360
2361 checkmark = PL_stack_sp - PL_stack_base;
2362 }
2363 while (slf_frame.check (aTHX_ &slf_frame));
2364
2365 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2366
2367 /* exception handling */
2368 if (expect_false (CORO_THROW))
2369 {
2370 SV *exception = sv_2mortal (CORO_THROW);
2371
2372 CORO_THROW = 0;
2373 sv_setsv (ERRSV, exception);
2374 croak (0);
2375 }
2376
2377 /* return value handling - mostly like entersub */
2378 /* make sure we put something on the stack in scalar context */
2379 if (GIMME_V == G_SCALAR)
2380 {
2381 dSP;
2382 SV **bot = PL_stack_base + checkmark;
2383
2384 if (sp == bot) /* too few, push undef */
2385 bot [1] = &PL_sv_undef;
2386 else if (sp != bot + 1) /* too many, take last one */
2387 bot [1] = *sp;
2388
2389 SP = bot + 1;
2390
2391 PUTBACK;
2392 }
2393
2394 return NORMAL;
2395}
2396
2397static void
2398api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2399{
2400 int i;
2401 SV **arg = PL_stack_base + ax;
2402 int items = PL_stack_sp - arg + 1;
2403
2404 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2405
2406 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2407 && PL_op->op_ppaddr != pp_slf)
2408 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2409
2410 CvFLAGS (cv) |= CVf_SLF;
2411 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2412 slf_cv = cv;
2413
2414 /* we patch the op, and then re-run the whole call */
2415 /* we have to put the same argument on the stack for this to work */
2416 /* and this will be done by pp_restore */
2417 slf_restore.op_next = (OP *)&slf_restore;
2418 slf_restore.op_type = OP_CUSTOM;
2419 slf_restore.op_ppaddr = pp_restore;
2420 slf_restore.op_first = PL_op;
2421
2422 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2423
2424 if (PL_op->op_flags & OPf_STACKED)
2425 {
2426 if (items > slf_arga)
2427 {
2428 slf_arga = items;
2429 Safefree (slf_argv);
2430 New (0, slf_argv, slf_arga, SV *);
2431 }
2432
2433 slf_argc = items;
2434
2435 for (i = 0; i < items; ++i)
2436 slf_argv [i] = SvREFCNT_inc (arg [i]);
2437 }
2438 else
2439 slf_argc = 0;
2440
2441 PL_op->op_ppaddr = pp_slf;
2442 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2443
2444 PL_op = (OP *)&slf_restore;
2445}
2446
2447/*****************************************************************************/
2448/* dynamic wind */
2449
2450static void
2451on_enterleave_call (pTHX_ SV *cb)
2452{
2453 dSP;
2454
2455 PUSHSTACK;
2456
2457 PUSHMARK (SP);
2458 PUTBACK;
2459 call_sv (cb, G_VOID | G_DISCARD);
2460 SPAGAIN;
2461
2462 POPSTACK;
2463}
2464
2465static SV *
2466coro_avp_pop_and_free (pTHX_ AV **avp)
2467{
2468 AV *av = *avp;
2469 SV *res = av_pop (av);
2470
2471 if (AvFILLp (av) < 0)
2472 {
2473 *avp = 0;
2474 SvREFCNT_dec (av);
2475 }
2476
2477 return res;
2478}
2479
2480static void
2481coro_pop_on_enter (pTHX_ void *coro)
2482{
2483 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2484 SvREFCNT_dec (cb);
2485}
2486
2487static void
2488coro_pop_on_leave (pTHX_ void *coro)
2489{
2490 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2491 on_enterleave_call (aTHX_ sv_2mortal (cb));
2492}
2493
2494/*****************************************************************************/
2495/* PerlIO::cede */
2496
2497typedef struct
2498{
2499 PerlIOBuf base;
2500 NV next, every;
2501} PerlIOCede;
2502
2503static IV
2504PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2505{
2506 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2507
2508 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2509 self->next = nvtime () + self->every;
2510
2511 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2512}
2513
2514static SV *
2515PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2516{
2517 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2518
2519 return newSVnv (self->every);
2520}
2521
2522static IV
2523PerlIOCede_flush (pTHX_ PerlIO *f)
2524{
2525 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2526 double now = nvtime ();
2527
2528 if (now >= self->next)
2529 {
2530 api_cede (aTHX);
2531 self->next = now + self->every;
2532 }
2533
2534 return PerlIOBuf_flush (aTHX_ f);
2535}
2536
2537static PerlIO_funcs PerlIO_cede =
2538{
2539 sizeof(PerlIO_funcs),
2540 "cede",
2541 sizeof(PerlIOCede),
2542 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2543 PerlIOCede_pushed,
2544 PerlIOBuf_popped,
2545 PerlIOBuf_open,
2546 PerlIOBase_binmode,
2547 PerlIOCede_getarg,
2548 PerlIOBase_fileno,
2549 PerlIOBuf_dup,
2550 PerlIOBuf_read,
2551 PerlIOBuf_unread,
2552 PerlIOBuf_write,
2553 PerlIOBuf_seek,
2554 PerlIOBuf_tell,
2555 PerlIOBuf_close,
2556 PerlIOCede_flush,
2557 PerlIOBuf_fill,
2558 PerlIOBase_eof,
2559 PerlIOBase_error,
2560 PerlIOBase_clearerr,
2561 PerlIOBase_setlinebuf,
2562 PerlIOBuf_get_base,
2563 PerlIOBuf_bufsiz,
2564 PerlIOBuf_get_ptr,
2565 PerlIOBuf_get_cnt,
2566 PerlIOBuf_set_ptrcnt,
2567};
2568
2569/*****************************************************************************/
2570/* Coro::Semaphore & Coro::Signal */
2571
2572static SV *
2573coro_waitarray_new (pTHX_ int count)
2574{
2575 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2576 AV *av = newAV ();
2577 SV **ary;
2578
2579 /* unfortunately, building manually saves memory */
2580 Newx (ary, 2, SV *);
2581 AvALLOC (av) = ary;
2582#if PERL_VERSION_ATLEAST (5,10,0)
2583 AvARRAY (av) = ary;
2584#else
2585 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2586 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2587 SvPVX ((SV *)av) = (char *)ary;
2588#endif
2589 AvMAX (av) = 1;
2590 AvFILLp (av) = 0;
2591 ary [0] = newSViv (count);
2592
2593 return newRV_noinc ((SV *)av);
2594}
2595
2596/* semaphore */
2597
2598static void
2599coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2600{
2601 SV *count_sv = AvARRAY (av)[0];
2602 IV count = SvIVX (count_sv);
2603
2604 count += adjust;
2605 SvIVX (count_sv) = count;
2606
2607 /* now wake up as many waiters as are expected to lock */
2608 while (count > 0 && AvFILLp (av) > 0)
2609 {
2610 SV *cb;
2611
2612 /* swap first two elements so we can shift a waiter */
2613 AvARRAY (av)[0] = AvARRAY (av)[1];
2614 AvARRAY (av)[1] = count_sv;
2615 cb = av_shift (av);
2616
2617 if (SvOBJECT (cb))
2618 {
2619 api_ready (aTHX_ cb);
2620 --count;
2621 }
2622 else if (SvTYPE (cb) == SVt_PVCV)
2623 {
2624 dSP;
2625 PUSHMARK (SP);
2626 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2627 PUTBACK;
2628 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2629 }
2630
2631 SvREFCNT_dec (cb);
2632 }
2633}
2634
2635static void
2636coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2637{
2638 /* call $sem->adjust (0) to possibly wake up some other waiters */
2639 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2640}
2641
996static void 2642static int
997api_cede (void) 2643slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
998{ 2644{
999 dTHX; 2645 AV *av = (AV *)frame->data;
1000 struct transfer_args ta; 2646 SV *count_sv = AvARRAY (av)[0];
1001 2647
1002 prepare_cede (&ta); 2648 /* if we are about to throw, don't actually acquire the lock, just throw */
1003 TRANSFER (ta); 2649 if (CORO_THROW)
1004} 2650 return 0;
2651 else if (SvIVX (count_sv) > 0)
2652 {
2653 SvSTATE_current->on_destroy = 0;
1005 2654
2655 if (acquire)
2656 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2657 else
2658 coro_semaphore_adjust (aTHX_ av, 0);
2659
2660 return 0;
2661 }
2662 else
2663 {
2664 int i;
2665 /* if we were woken up but can't down, we look through the whole */
2666 /* waiters list and only add us if we aren't in there already */
2667 /* this avoids some degenerate memory usage cases */
2668
2669 for (i = 1; i <= AvFILLp (av); ++i)
2670 if (AvARRAY (av)[i] == SvRV (coro_current))
2671 return 1;
2672
2673 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2674 return 1;
2675 }
2676}
2677
2678static int
2679slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2680{
2681 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2682}
2683
2684static int
2685slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2686{
2687 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2688}
2689
2690static void
2691slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2692{
2693 AV *av = (AV *)SvRV (arg [0]);
2694
2695 if (SvIVX (AvARRAY (av)[0]) > 0)
2696 {
2697 frame->data = (void *)av;
2698 frame->prepare = prepare_nop;
2699 }
2700 else
2701 {
2702 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2703
2704 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2705 frame->prepare = prepare_schedule;
2706
2707 /* to avoid race conditions when a woken-up coro gets terminated */
2708 /* we arrange for a temporary on_destroy that calls adjust (0) */
2709 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2710 }
2711}
2712
2713static void
2714slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2715{
2716 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2717 frame->check = slf_check_semaphore_down;
2718}
2719
2720static void
2721slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2722{
2723 if (items >= 2)
2724 {
2725 /* callback form */
2726 AV *av = (AV *)SvRV (arg [0]);
2727 SV *cb_cv = s_get_cv_croak (arg [1]);
2728
2729 av_push (av, SvREFCNT_inc_NN (cb_cv));
2730
2731 if (SvIVX (AvARRAY (av)[0]) > 0)
2732 coro_semaphore_adjust (aTHX_ av, 0);
2733
2734 frame->prepare = prepare_nop;
2735 frame->check = slf_check_nop;
2736 }
2737 else
2738 {
2739 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2740 frame->check = slf_check_semaphore_wait;
2741 }
2742}
2743
2744/* signal */
2745
2746static void
2747coro_signal_wake (pTHX_ AV *av, int count)
2748{
2749 SvIVX (AvARRAY (av)[0]) = 0;
2750
2751 /* now signal count waiters */
2752 while (count > 0 && AvFILLp (av) > 0)
2753 {
2754 SV *cb;
2755
2756 /* swap first two elements so we can shift a waiter */
2757 cb = AvARRAY (av)[0];
2758 AvARRAY (av)[0] = AvARRAY (av)[1];
2759 AvARRAY (av)[1] = cb;
2760
2761 cb = av_shift (av);
2762
2763 if (SvTYPE (cb) == SVt_PVCV)
2764 {
2765 dSP;
2766 PUSHMARK (SP);
2767 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2768 PUTBACK;
2769 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2770 }
2771 else
2772 {
2773 api_ready (aTHX_ cb);
2774 sv_setiv (cb, 0); /* signal waiter */
2775 }
2776
2777 SvREFCNT_dec (cb);
2778
2779 --count;
2780 }
2781}
2782
2783static int
2784slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2785{
2786 /* if we are about to throw, also stop waiting */
2787 return SvROK ((SV *)frame->data) && !CORO_THROW;
2788}
2789
2790static void
2791slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2792{
2793 AV *av = (AV *)SvRV (arg [0]);
2794
2795 if (items >= 2)
2796 {
2797 SV *cb_cv = s_get_cv_croak (arg [1]);
2798 av_push (av, SvREFCNT_inc_NN (cb_cv));
2799
2800 if (SvIVX (AvARRAY (av)[0]))
2801 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2802
2803 frame->prepare = prepare_nop;
2804 frame->check = slf_check_nop;
2805 }
2806 else if (SvIVX (AvARRAY (av)[0]))
2807 {
2808 SvIVX (AvARRAY (av)[0]) = 0;
2809 frame->prepare = prepare_nop;
2810 frame->check = slf_check_nop;
2811 }
2812 else
2813 {
2814 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2815
2816 av_push (av, waiter);
2817
2818 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2819 frame->prepare = prepare_schedule;
2820 frame->check = slf_check_signal_wait;
2821 }
2822}
2823
2824/*****************************************************************************/
2825/* Coro::AIO */
2826
2827#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2828
2829/* helper storage struct */
2830struct io_state
2831{
2832 int errorno;
2833 I32 laststype; /* U16 in 5.10.0 */
2834 int laststatval;
2835 Stat_t statcache;
2836};
2837
2838static void
2839coro_aio_callback (pTHX_ CV *cv)
2840{
2841 dXSARGS;
2842 AV *state = (AV *)S_GENSUB_ARG;
2843 SV *coro = av_pop (state);
2844 SV *data_sv = newSV (sizeof (struct io_state));
2845
2846 av_extend (state, items - 1);
2847
2848 sv_upgrade (data_sv, SVt_PV);
2849 SvCUR_set (data_sv, sizeof (struct io_state));
2850 SvPOK_only (data_sv);
2851
2852 {
2853 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2854
2855 data->errorno = errno;
2856 data->laststype = PL_laststype;
2857 data->laststatval = PL_laststatval;
2858 data->statcache = PL_statcache;
2859 }
2860
2861 /* now build the result vector out of all the parameters and the data_sv */
2862 {
2863 int i;
2864
2865 for (i = 0; i < items; ++i)
2866 av_push (state, SvREFCNT_inc_NN (ST (i)));
2867 }
2868
2869 av_push (state, data_sv);
2870
2871 api_ready (aTHX_ coro);
2872 SvREFCNT_dec (coro);
2873 SvREFCNT_dec ((AV *)state);
2874}
2875
2876static int
2877slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2878{
2879 AV *state = (AV *)frame->data;
2880
2881 /* if we are about to throw, return early */
2882 /* this does not cancel the aio request, but at least */
2883 /* it quickly returns */
2884 if (CORO_THROW)
2885 return 0;
2886
2887 /* one element that is an RV? repeat! */
2888 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2889 return 1;
2890
2891 /* restore status */
2892 {
2893 SV *data_sv = av_pop (state);
2894 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2895
2896 errno = data->errorno;
2897 PL_laststype = data->laststype;
2898 PL_laststatval = data->laststatval;
2899 PL_statcache = data->statcache;
2900
2901 SvREFCNT_dec (data_sv);
2902 }
2903
2904 /* push result values */
2905 {
2906 dSP;
2907 int i;
2908
2909 EXTEND (SP, AvFILLp (state) + 1);
2910 for (i = 0; i <= AvFILLp (state); ++i)
2911 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2912
2913 PUTBACK;
2914 }
2915
2916 return 0;
2917}
2918
2919static void
2920slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2921{
2922 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2923 SV *coro_hv = SvRV (coro_current);
2924 struct coro *coro = SvSTATE_hv (coro_hv);
2925
2926 /* put our coroutine id on the state arg */
2927 av_push (state, SvREFCNT_inc_NN (coro_hv));
2928
2929 /* first see whether we have a non-zero priority and set it as AIO prio */
2930 if (coro->prio)
2931 {
2932 dSP;
2933
2934 static SV *prio_cv;
2935 static SV *prio_sv;
2936
2937 if (expect_false (!prio_cv))
2938 {
2939 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2940 prio_sv = newSViv (0);
2941 }
2942
2943 PUSHMARK (SP);
2944 sv_setiv (prio_sv, coro->prio);
2945 XPUSHs (prio_sv);
2946
2947 PUTBACK;
2948 call_sv (prio_cv, G_VOID | G_DISCARD);
2949 }
2950
2951 /* now call the original request */
2952 {
2953 dSP;
2954 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2955 int i;
2956
2957 PUSHMARK (SP);
2958
2959 /* first push all args to the stack */
2960 EXTEND (SP, items + 1);
2961
2962 for (i = 0; i < items; ++i)
2963 PUSHs (arg [i]);
2964
2965 /* now push the callback closure */
2966 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2967
2968 /* now call the AIO function - we assume our request is uncancelable */
2969 PUTBACK;
2970 call_sv ((SV *)req, G_VOID | G_DISCARD);
2971 }
2972
2973 /* now that the request is going, we loop till we have a result */
2974 frame->data = (void *)state;
2975 frame->prepare = prepare_schedule;
2976 frame->check = slf_check_aio_req;
2977}
2978
2979static void
2980coro_aio_req_xs (pTHX_ CV *cv)
2981{
2982 dXSARGS;
2983
2984 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2985
2986 XSRETURN_EMPTY;
2987}
2988
2989/*****************************************************************************/
2990
2991#if CORO_CLONE
2992# include "clone.c"
2993#endif
2994
2995/*****************************************************************************/
2996
2997static SV *
2998coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2999{
3000 SV *coro_sv;
3001 struct coro *coro;
3002 MAGIC *mg;
3003 HV *hv;
3004 SV *cb;
3005 int i;
3006
3007 if (argc > 0)
3008 {
3009 cb = s_get_cv_croak (argv [0]);
3010
3011 if (!is_coro)
3012 {
3013 if (CvISXSUB (cb))
3014 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3015
3016 if (!CvROOT (cb))
3017 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3018 }
3019 }
3020
3021 Newz (0, coro, 1, struct coro);
3022 coro->args = newAV ();
3023 coro->flags = CF_NEW;
3024
3025 if (coro_first) coro_first->prev = coro;
3026 coro->next = coro_first;
3027 coro_first = coro;
3028
3029 coro->hv = hv = newHV ();
3030 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3031 mg->mg_flags |= MGf_DUP;
3032 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3033
3034 if (argc > 0)
3035 {
3036 av_extend (coro->args, argc + is_coro - 1);
3037
3038 if (is_coro)
3039 {
3040 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3041 cb = (SV *)cv_coro_run;
3042 }
3043
3044 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3045
3046 for (i = 1; i < argc; i++)
3047 av_push (coro->args, newSVsv (argv [i]));
3048 }
3049
3050 return coro_sv;
3051}
3052
1006MODULE = Coro::State PACKAGE = Coro::State 3053MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1007 3054
1008PROTOTYPES: DISABLE 3055PROTOTYPES: DISABLE
1009 3056
1010BOOT: 3057BOOT:
1011{ 3058{
1012#ifdef USE_ITHREADS 3059#ifdef USE_ITHREADS
1013 MUTEX_INIT (&coro_mutex); 3060# if CORO_PTHREAD
3061 coro_thx = PERL_GET_CONTEXT;
3062# endif
1014#endif 3063#endif
1015 BOOT_PAGESIZE; 3064 BOOT_PAGESIZE;
1016 3065
3066 cctx_current = cctx_new_empty ();
3067
3068 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3069 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3070
3071 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3072 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3073 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3074
3075 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3076 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3077 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3078
1017 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3079 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1018 3080
1019 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3081 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1020 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3082 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1021 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3083 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3084 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1022 3085
1023 main_mainstack = PL_mainstack; 3086 main_mainstack = PL_mainstack;
3087 main_top_env = PL_top_env;
1024 3088
3089 while (main_top_env->je_prev)
3090 main_top_env = main_top_env->je_prev;
3091
3092 {
3093 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3094
3095 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3096 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3097
3098 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3099 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3100 }
3101
1025 coroapi.ver = CORO_API_VERSION; 3102 coroapi.ver = CORO_API_VERSION;
3103 coroapi.rev = CORO_API_REVISION;
3104
1026 coroapi.transfer = api_transfer; 3105 coroapi.transfer = api_transfer;
1027 3106
3107 coroapi.sv_state = SvSTATE_;
3108 coroapi.execute_slf = api_execute_slf;
3109 coroapi.prepare_nop = prepare_nop;
3110 coroapi.prepare_schedule = prepare_schedule;
3111 coroapi.prepare_cede = prepare_cede;
3112 coroapi.prepare_cede_notself = prepare_cede_notself;
3113
3114 {
3115 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3116
3117 if (!svp) croak ("Time::HiRes is required");
3118 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3119
3120 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3121
3122 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3123 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3124 }
3125
1028 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3126 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1029} 3127}
1030 3128
1031SV * 3129SV *
1032new (char *klass, ...) 3130new (SV *klass, ...)
3131 ALIAS:
3132 Coro::new = 1
1033 CODE: 3133 CODE:
1034{ 3134 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1035 struct coro *coro; 3135 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 3136 RETVAL
1054 3137
1055void 3138void
1056_set_stacklevel (...) 3139transfer (...)
1057 ALIAS: 3140 PROTOTYPE: $$
1058 Coro::State::transfer = 1 3141 CODE:
1059 Coro::schedule = 2 3142 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 3143
1066 switch (ix) 3144bool
1067 { 3145_destroy (SV *coro_sv)
1068 case 0: 3146 CODE:
1069 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 3147 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1070 ta.next = 0; 3148 OUTPUT:
1071 ta.flags = TRANSFER_SET_STACKLEVEL; 3149 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 3150
1120void 3151void
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) 3152_exit (int code)
1134 int code
1135 PROTOTYPE: $ 3153 PROTOTYPE: $
1136 CODE: 3154 CODE:
1137 _exit (code); 3155 _exit (code);
1138 3156
3157SV *
3158clone (Coro::State coro)
3159 CODE:
3160{
3161#if CORO_CLONE
3162 struct coro *ncoro = coro_clone (aTHX_ coro);
3163 MAGIC *mg;
3164 /* TODO: too much duplication */
3165 ncoro->hv = newHV ();
3166 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3167 mg->mg_flags |= MGf_DUP;
3168 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3169#else
3170 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3171#endif
3172}
3173 OUTPUT:
3174 RETVAL
3175
3176int
3177cctx_stacksize (int new_stacksize = 0)
3178 PROTOTYPE: ;$
3179 CODE:
3180 RETVAL = cctx_stacksize;
3181 if (new_stacksize)
3182 {
3183 cctx_stacksize = new_stacksize;
3184 ++cctx_gen;
3185 }
3186 OUTPUT:
3187 RETVAL
3188
3189int
3190cctx_max_idle (int max_idle = 0)
3191 PROTOTYPE: ;$
3192 CODE:
3193 RETVAL = cctx_max_idle;
3194 if (max_idle > 1)
3195 cctx_max_idle = max_idle;
3196 OUTPUT:
3197 RETVAL
3198
3199int
3200cctx_count ()
3201 PROTOTYPE:
3202 CODE:
3203 RETVAL = cctx_count;
3204 OUTPUT:
3205 RETVAL
3206
3207int
3208cctx_idle ()
3209 PROTOTYPE:
3210 CODE:
3211 RETVAL = cctx_idle;
3212 OUTPUT:
3213 RETVAL
3214
3215void
3216list ()
3217 PROTOTYPE:
3218 PPCODE:
3219{
3220 struct coro *coro;
3221 for (coro = coro_first; coro; coro = coro->next)
3222 if (coro->hv)
3223 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3224}
3225
3226void
3227call (Coro::State coro, SV *coderef)
3228 ALIAS:
3229 eval = 1
3230 CODE:
3231{
3232 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3233 {
3234 struct coro *current = SvSTATE_current;
3235
3236 if (current != coro)
3237 {
3238 PUTBACK;
3239 save_perl (aTHX_ current);
3240 load_perl (aTHX_ coro);
3241 SPAGAIN;
3242 }
3243
3244 PUSHSTACK;
3245
3246 PUSHMARK (SP);
3247 PUTBACK;
3248
3249 if (ix)
3250 eval_sv (coderef, 0);
3251 else
3252 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3253
3254 POPSTACK;
3255 SPAGAIN;
3256
3257 if (current != coro)
3258 {
3259 PUTBACK;
3260 save_perl (aTHX_ coro);
3261 load_perl (aTHX_ current);
3262 SPAGAIN;
3263 }
3264 }
3265}
3266
3267SV *
3268is_ready (Coro::State coro)
3269 PROTOTYPE: $
3270 ALIAS:
3271 is_ready = CF_READY
3272 is_running = CF_RUNNING
3273 is_new = CF_NEW
3274 is_destroyed = CF_DESTROYED
3275 is_suspended = CF_SUSPENDED
3276 CODE:
3277 RETVAL = boolSV (coro->flags & ix);
3278 OUTPUT:
3279 RETVAL
3280
3281void
3282throw (Coro::State self, SV *exception = &PL_sv_undef)
3283 PROTOTYPE: $;$
3284 CODE:
3285{
3286 struct coro *current = SvSTATE_current;
3287 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3288 SvREFCNT_dec (*exceptionp);
3289 SvGETMAGIC (exception);
3290 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3291}
3292
3293void
3294api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3295 PROTOTYPE: $;$
3296 C_ARGS: aTHX_ coro, flags
3297
3298SV *
3299has_cctx (Coro::State coro)
3300 PROTOTYPE: $
3301 CODE:
3302 /* maybe manage the running flag differently */
3303 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3304 OUTPUT:
3305 RETVAL
3306
3307int
3308is_traced (Coro::State coro)
3309 PROTOTYPE: $
3310 CODE:
3311 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3312 OUTPUT:
3313 RETVAL
3314
3315UV
3316rss (Coro::State coro)
3317 PROTOTYPE: $
3318 ALIAS:
3319 usecount = 1
3320 CODE:
3321 switch (ix)
3322 {
3323 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3324 case 1: RETVAL = coro->usecount; break;
3325 }
3326 OUTPUT:
3327 RETVAL
3328
3329void
3330force_cctx ()
3331 PROTOTYPE:
3332 CODE:
3333 cctx_current->idle_sp = 0;
3334
3335void
3336swap_defsv (Coro::State self)
3337 PROTOTYPE: $
3338 ALIAS:
3339 swap_defav = 1
3340 CODE:
3341 if (!self->slot)
3342 croak ("cannot swap state with coroutine that has no saved state,");
3343 else
3344 {
3345 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3346 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3347
3348 SV *tmp = *src; *src = *dst; *dst = tmp;
3349 }
3350
3351void
3352cancel (Coro::State self)
3353 CODE:
3354 coro_state_destroy (aTHX_ self);
3355 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3356
3357
3358SV *
3359enable_times (int enabled = enable_times)
3360 CODE:
3361{
3362 RETVAL = boolSV (enable_times);
3363
3364 if (enabled != enable_times)
3365 {
3366 enable_times = enabled;
3367
3368 coro_times_update ();
3369 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3370 }
3371}
3372 OUTPUT:
3373 RETVAL
3374
3375void
3376times (Coro::State self)
3377 PPCODE:
3378{
3379 struct coro *current = SvSTATE (coro_current);
3380
3381 if (expect_false (current == self))
3382 {
3383 coro_times_update ();
3384 coro_times_add (SvSTATE (coro_current));
3385 }
3386
3387 EXTEND (SP, 2);
3388 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3389 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3390
3391 if (expect_false (current == self))
3392 coro_times_sub (SvSTATE (coro_current));
3393}
3394
3395void
3396swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3397 CODE:
3398{
3399 struct coro *current = SvSTATE_current;
3400
3401 if (current == coro)
3402 SWAP_SVS (current);
3403
3404 if (!coro->swap_sv)
3405 coro->swap_sv = newAV ();
3406
3407 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3408 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3409
3410 if (current == coro)
3411 SWAP_SVS (current);
3412}
3413
3414
1139MODULE = Coro::State PACKAGE = Coro 3415MODULE = Coro::State PACKAGE = Coro
1140 3416
1141BOOT: 3417BOOT:
1142{ 3418{
1143 int i; 3419 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3420 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3421 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3422 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3423 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3424 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3425 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3426 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3427 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1144 3428
3429 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3430 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3431 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3432 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3433
1145 coro_stash = gv_stashpv ("Coro", TRUE); 3434 coro_stash = gv_stashpv ("Coro", TRUE);
1146 3435
1147 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3436 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1148 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3437 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1149 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3438 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1150 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3439 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1151 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3440 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1152 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3441 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 3442
1160 { 3443 {
1161 SV *sv = perl_get_sv("Coro::API", 1); 3444 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1162 3445
1163 coroapi.schedule = api_schedule; 3446 coroapi.schedule = api_schedule;
3447 coroapi.schedule_to = api_schedule_to;
1164 coroapi.cede = api_cede; 3448 coroapi.cede = api_cede;
3449 coroapi.cede_notself = api_cede_notself;
1165 coroapi.ready = api_ready; 3450 coroapi.ready = api_ready;
3451 coroapi.is_ready = api_is_ready;
1166 coroapi.nready = &coro_nready; 3452 coroapi.nready = coro_nready;
1167 coroapi.current = coro_current; 3453 coroapi.current = coro_current;
1168 3454
1169 GCoroAPI = &coroapi; 3455 /*GCoroAPI = &coroapi;*/
1170 sv_setiv (sv, (IV)&coroapi); 3456 sv_setiv (sv, (IV)&coroapi);
1171 SvREADONLY_on (sv); 3457 SvREADONLY_on (sv);
1172 } 3458 }
1173} 3459}
1174 3460
3461SV *
3462async (...)
3463 PROTOTYPE: &@
3464 CODE:
3465 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3466 api_ready (aTHX_ RETVAL);
3467 OUTPUT:
3468 RETVAL
3469
3470void
3471terminate (...)
3472 CODE:
3473 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3474
3475void
3476schedule (...)
3477 CODE:
3478 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3479
3480void
3481schedule_to (...)
3482 CODE:
3483 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3484
3485void
3486cede_to (...)
3487 CODE:
3488 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3489
3490void
3491cede (...)
3492 CODE:
3493 CORO_EXECUTE_SLF_XS (slf_init_cede);
3494
3495void
3496cede_notself (...)
3497 CODE:
3498 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3499
3500void
3501_set_current (SV *current)
3502 PROTOTYPE: $
3503 CODE:
3504 SvREFCNT_dec (SvRV (coro_current));
3505 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3506
3507void
3508_set_readyhook (SV *hook)
3509 PROTOTYPE: $
3510 CODE:
3511 SvREFCNT_dec (coro_readyhook);
3512 SvGETMAGIC (hook);
3513 if (SvOK (hook))
3514 {
3515 coro_readyhook = newSVsv (hook);
3516 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3517 }
3518 else
3519 {
3520 coro_readyhook = 0;
3521 CORO_READYHOOK = 0;
3522 }
3523
1175int 3524int
1176prio (Coro::State coro, int newprio = 0) 3525prio (Coro::State coro, int newprio = 0)
3526 PROTOTYPE: $;$
1177 ALIAS: 3527 ALIAS:
1178 nice = 1 3528 nice = 1
1179 CODE: 3529 CODE:
1180{ 3530{
1181 RETVAL = coro->prio; 3531 RETVAL = coro->prio;
1182 3532
1183 if (items > 1) 3533 if (items > 1)
1184 { 3534 {
1185 if (ix) 3535 if (ix)
1186 newprio += coro->prio; 3536 newprio = coro->prio - newprio;
1187 3537
1188 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3538 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1189 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3539 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1190 3540
1191 coro->prio = newprio; 3541 coro->prio = newprio;
1192 } 3542 }
1193} 3543}
3544 OUTPUT:
3545 RETVAL
1194 3546
1195void 3547SV *
1196ready (SV *self) 3548ready (SV *self)
1197 PROTOTYPE: $ 3549 PROTOTYPE: $
1198 CODE: 3550 CODE:
1199 api_ready (self); 3551 RETVAL = boolSV (api_ready (aTHX_ self));
3552 OUTPUT:
3553 RETVAL
1200 3554
1201int 3555int
1202nready (...) 3556nready (...)
1203 PROTOTYPE: 3557 PROTOTYPE:
1204 CODE: 3558 CODE:
1205 RETVAL = coro_nready; 3559 RETVAL = coro_nready;
1206 OUTPUT: 3560 OUTPUT:
1207 RETVAL 3561 RETVAL
1208 3562
1209MODULE = Coro::State PACKAGE = Coro::AIO 3563void
3564suspend (Coro::State self)
3565 PROTOTYPE: $
3566 CODE:
3567 self->flags |= CF_SUSPENDED;
3568
3569void
3570resume (Coro::State self)
3571 PROTOTYPE: $
3572 CODE:
3573 self->flags &= ~CF_SUSPENDED;
3574
3575void
3576_pool_handler (...)
3577 CODE:
3578 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3579
3580void
3581async_pool (SV *cv, ...)
3582 PROTOTYPE: &@
3583 PPCODE:
3584{
3585 HV *hv = (HV *)av_pop (av_async_pool);
3586 AV *av = newAV ();
3587 SV *cb = ST (0);
3588 int i;
3589
3590 av_extend (av, items - 2);
3591 for (i = 1; i < items; ++i)
3592 av_push (av, SvREFCNT_inc_NN (ST (i)));
3593
3594 if ((SV *)hv == &PL_sv_undef)
3595 {
3596 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3597 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3598 SvREFCNT_dec (sv);
3599 }
3600
3601 {
3602 struct coro *coro = SvSTATE_hv (hv);
3603
3604 assert (!coro->invoke_cb);
3605 assert (!coro->invoke_av);
3606 coro->invoke_cb = SvREFCNT_inc (cb);
3607 coro->invoke_av = av;
3608 }
3609
3610 api_ready (aTHX_ (SV *)hv);
3611
3612 if (GIMME_V != G_VOID)
3613 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3614 else
3615 SvREFCNT_dec (hv);
3616}
1210 3617
1211SV * 3618SV *
1212_get_state () 3619rouse_cb ()
3620 PROTOTYPE:
1213 CODE: 3621 CODE:
1214{ 3622 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: 3623 OUTPUT:
1230 RETVAL 3624 RETVAL
1231 3625
1232void 3626void
1233_set_state (char *data_) 3627rouse_wait (...)
3628 PROTOTYPE: ;$
3629 PPCODE:
3630 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3631
3632void
3633on_enter (SV *block)
3634 ALIAS:
3635 on_leave = 1
1234 PROTOTYPE: $ 3636 PROTOTYPE: &
1235 CODE: 3637 CODE:
1236{ 3638{
1237 struct { 3639 struct coro *coro = SvSTATE_current;
3640 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3641
3642 block = s_get_cv_croak (block);
3643
3644 if (!*avp)
3645 *avp = newAV ();
3646
3647 av_push (*avp, SvREFCNT_inc (block));
3648
3649 if (!ix)
3650 on_enterleave_call (aTHX_ block);
3651
3652 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3653 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3654 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3655}
3656
3657
3658MODULE = Coro::State PACKAGE = PerlIO::cede
3659
3660BOOT:
3661 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3662
3663
3664MODULE = Coro::State PACKAGE = Coro::Semaphore
3665
3666SV *
3667new (SV *klass, SV *count = 0)
3668 CODE:
3669{
3670 int semcnt = 1;
3671
3672 if (count)
3673 {
3674 SvGETMAGIC (count);
3675
3676 if (SvOK (count))
3677 semcnt = SvIV (count);
3678 }
3679
3680 RETVAL = sv_bless (
3681 coro_waitarray_new (aTHX_ semcnt),
3682 GvSTASH (CvGV (cv))
3683 );
3684}
3685 OUTPUT:
3686 RETVAL
3687
3688# helper for Coro::Channel and others
3689SV *
3690_alloc (int count)
3691 CODE:
3692 RETVAL = coro_waitarray_new (aTHX_ count);
3693 OUTPUT:
3694 RETVAL
3695
3696SV *
3697count (SV *self)
3698 CODE:
3699 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3700 OUTPUT:
3701 RETVAL
3702
3703void
3704up (SV *self, int adjust = 1)
3705 ALIAS:
3706 adjust = 1
3707 CODE:
3708 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3709
3710void
3711down (...)
3712 CODE:
3713 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3714
3715void
3716wait (...)
3717 CODE:
3718 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3719
3720void
3721try (SV *self)
3722 PPCODE:
3723{
3724 AV *av = (AV *)SvRV (self);
3725 SV *count_sv = AvARRAY (av)[0];
3726 IV count = SvIVX (count_sv);
3727
3728 if (count > 0)
3729 {
3730 --count;
3731 SvIVX (count_sv) = count;
3732 XSRETURN_YES;
3733 }
3734 else
3735 XSRETURN_NO;
3736}
3737
3738void
3739waiters (SV *self)
3740 PPCODE:
3741{
3742 AV *av = (AV *)SvRV (self);
3743 int wcount = AvFILLp (av) + 1 - 1;
3744
3745 if (GIMME_V == G_SCALAR)
3746 XPUSHs (sv_2mortal (newSViv (wcount)));
3747 else
3748 {
1238 int errorno; 3749 int i;
1239 int laststype; 3750 EXTEND (SP, wcount);
1240 int laststatval; 3751 for (i = 1; i <= wcount; ++i)
1241 Stat_t statcache; 3752 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1242 } *data = (void *)data_; 3753 }
1243
1244 errno = data->errorno;
1245 PL_laststype = data->laststype;
1246 PL_laststatval = data->laststatval;
1247 PL_statcache = data->statcache;
1248} 3754}
3755
3756MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3757
3758void
3759_may_delete (SV *sem, int count, int extra_refs)
3760 PPCODE:
3761{
3762 AV *av = (AV *)SvRV (sem);
3763
3764 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3765 && AvFILLp (av) == 0 /* no waiters, just count */
3766 && SvIV (AvARRAY (av)[0]) == count)
3767 XSRETURN_YES;
3768
3769 XSRETURN_NO;
3770}
3771
3772MODULE = Coro::State PACKAGE = Coro::Signal
3773
3774SV *
3775new (SV *klass)
3776 CODE:
3777 RETVAL = sv_bless (
3778 coro_waitarray_new (aTHX_ 0),
3779 GvSTASH (CvGV (cv))
3780 );
3781 OUTPUT:
3782 RETVAL
3783
3784void
3785wait (...)
3786 CODE:
3787 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3788
3789void
3790broadcast (SV *self)
3791 CODE:
3792{
3793 AV *av = (AV *)SvRV (self);
3794 coro_signal_wake (aTHX_ av, AvFILLp (av));
3795}
3796
3797void
3798send (SV *self)
3799 CODE:
3800{
3801 AV *av = (AV *)SvRV (self);
3802
3803 if (AvFILLp (av))
3804 coro_signal_wake (aTHX_ av, 1);
3805 else
3806 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3807}
3808
3809IV
3810awaited (SV *self)
3811 CODE:
3812 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3813 OUTPUT:
3814 RETVAL
3815
3816
3817MODULE = Coro::State PACKAGE = Coro::AnyEvent
3818
3819BOOT:
3820 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3821
3822void
3823_schedule (...)
3824 CODE:
3825{
3826 static int incede;
3827
3828 api_cede_notself (aTHX);
3829
3830 ++incede;
3831 while (coro_nready >= incede && api_cede (aTHX))
3832 ;
3833
3834 sv_setsv (sv_activity, &PL_sv_undef);
3835 if (coro_nready >= incede)
3836 {
3837 PUSHMARK (SP);
3838 PUTBACK;
3839 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3840 }
3841
3842 --incede;
3843}
3844
3845
3846MODULE = Coro::State PACKAGE = Coro::AIO
3847
3848void
3849_register (char *target, char *proto, SV *req)
3850 CODE:
3851{
3852 SV *req_cv = s_get_cv_croak (req);
3853 /* newXSproto doesn't return the CV on 5.8 */
3854 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3855 sv_setpv ((SV *)slf_cv, proto);
3856 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3857}
3858
3859MODULE = Coro::State PACKAGE = Coro::Select
3860
3861void
3862patch_pp_sselect ()
3863 CODE:
3864 if (!coro_old_pp_sselect)
3865 {
3866 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3867 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3868 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3869 }
3870
3871void
3872unpatch_pp_sselect ()
3873 CODE:
3874 if (coro_old_pp_sselect)
3875 {
3876 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3877 coro_old_pp_sselect = 0;
3878 }
3879

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