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Comparing Coro/Coro/State.xs (file contents):
Revision 1.84 by root, Fri Nov 24 00:31:21 2006 UTC vs.
Revision 1.363 by root, Tue Jul 14 00:55:10 2009 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "schmorp.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
12# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr
14# endif
15# ifndef call_sv
16# define call_sv perl_call_sv
17# endif
18# ifndef get_sv
19# define get_sv perl_get_sv
20# endif
21# ifndef get_cv
22# define get_cv perl_get_cv
23# endif
24# ifndef IS_PADGV
25# define IS_PADGV(v) 0
26# endif
27# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0
29# endif
30#endif
31
32#include <errno.h> 14#include <errno.h>
15#include <assert.h>
33 16
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
35# undef STACKGUARD 18# undef setjmp
36#endif 19# undef longjmp
37 20# undef _exit
38#ifndef STACKGUARD 21# define setjmp _setjmp /* deep magic */
39# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
40#endif 24#endif
41 25
42#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
43# include <unistd.h> 27# include <unistd.h>
44# include <sys/mman.h> 28# include <sys/mman.h>
… …
53# ifndef PAGESIZE 37# ifndef PAGESIZE
54# define PAGESIZE pagesize 38# define PAGESIZE pagesize
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize; 40static long pagesize;
57# else 41# else
58# define BOOT_PAGESIZE 42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
57# undef CORO_STACKGUARD
58#endif
59
60#ifndef CORO_STACKGUARD
61# define CORO_STACKGUARD 0
62#endif
63
64/* prefer perl internal functions over our own? */
65#ifndef CORO_PREFER_PERL_FUNCTIONS
66# define CORO_PREFER_PERL_FUNCTIONS 0
67#endif
68
69/* The next macros try to return the current stack pointer, in an as
70 * portable way as possible. */
71#if __GNUC__ >= 4
72# define dSTACKLEVEL int stacklevel_dummy
73# define STACKLEVEL __builtin_frame_address (0)
74#else
75# define dSTACKLEVEL volatile void *stacklevel
76# define STACKLEVEL ((void *)&stacklevel)
77#endif
78
79#define IN_DESTRUCT PL_dirty
80
81#if __GNUC__ >= 3
82# define attribute(x) __attribute__(x)
83# define expect(expr,value) __builtin_expect ((expr), (value))
84# define INLINE static inline
85#else
86# define attribute(x)
87# define expect(expr,value) (expr)
88# define INLINE static
89#endif
90
91#define expect_false(expr) expect ((expr) != 0, 0)
92#define expect_true(expr) expect ((expr) != 0, 1)
93
94#define NOINLINE attribute ((noinline))
95
96#include "CoroAPI.h"
97#define GCoroAPI (&coroapi) /* very sneaky */
98
99#ifdef USE_ITHREADS
100# if CORO_PTHREAD
101static void *coro_thx;
59# endif 102# endif
60#endif 103#endif
61 104
62#define SUB_INIT "Coro::State::initialize" 105#ifdef __linux
63#define UCORO_STATE "_coro_state" 106# include <time.h> /* for timespec */
64 107# include <syscall.h> /* for SYS_* */
65/* The next macro should declare a variable stacklevel that contains and approximation 108# ifdef SYS_clock_gettime
66 * to the current C stack pointer. Its property is that it changes with each call 109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
67 * and should be unique. */ 110# define CORO_CLOCK_MONOTONIC 1
68#define dSTACKLEVEL void *stacklevel = &stacklevel 111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
69 112# endif
70#define IN_DESTRUCT (PL_main_cv == Nullcv)
71
72#define labs(l) ((l) >= 0 ? (l) : -(l))
73
74#include "CoroAPI.h"
75
76#ifdef USE_ITHREADS
77static perl_mutex coro_mutex;
78# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
80#else
81# define LOCK (void)0
82# define UNLOCK (void)0
83#endif 113#endif
84 114
115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
117
118/* we hijack an hopefully unused CV flag for our purposes */
119#define CVf_SLF 0x4000
120static OP *pp_slf (pTHX);
121
122static U32 cctx_gen;
123static size_t cctx_stacksize = CORO_STACKSIZE;
85static struct CoroAPI coroapi; 124static struct CoroAPI coroapi;
86static AV *main_mainstack; /* used to differentiate between $main and others */ 125static AV *main_mainstack; /* used to differentiate between $main and others */
126static JMPENV *main_top_env;
87static HV *coro_state_stash; 127static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static SV *coro_mortal; /* will be freed after next transfer */ 128static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
91 129
92/* this is actually not only the c stack but also c registers etc... */ 130static AV *av_destroy; /* destruction queue */
131static SV *sv_manager; /* the manager coro */
132static SV *sv_idle; /* $Coro::idle */
133
134static GV *irsgv; /* $/ */
135static GV *stdoutgv; /* *STDOUT */
136static SV *rv_diehook;
137static SV *rv_warnhook;
138static HV *hv_sig; /* %SIG */
139
140/* async_pool helper stuff */
141static SV *sv_pool_rss;
142static SV *sv_pool_size;
143static SV *sv_async_pool_idle; /* description string */
144static AV *av_async_pool; /* idle pool */
145static SV *sv_Coro; /* class string */
146static CV *cv_pool_handler;
147static CV *cv_coro_state_new;
148
149/* Coro::AnyEvent */
150static SV *sv_activity;
151
152/* enable processtime/realtime profiling */
153static char enable_times;
154typedef U32 coro_ts[2];
155static coro_ts time_real, time_cpu;
156static char times_valid;
157
158static struct coro_cctx *cctx_first;
159static int cctx_count, cctx_idle;
160
161enum {
162 CC_MAPPED = 0x01,
163 CC_NOREUSE = 0x02, /* throw this away after tracing */
164 CC_TRACE = 0x04,
165 CC_TRACE_SUB = 0x08, /* trace sub calls */
166 CC_TRACE_LINE = 0x10, /* trace each statement */
167 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
168};
169
170/* this is a structure representing a c-level coroutine */
93typedef struct { 171typedef struct coro_cctx
94 int refcnt; /* pointer reference counter */ 172{
95 int usecnt; /* shared by how many coroutines */ 173 struct coro_cctx *next;
96 int gencnt; /* generation counter */
97 174
175 /* the stack */
176 void *sptr;
177 size_t ssize;
178
179 /* cpu state */
180 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
181 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
182 JMPENV *top_env;
98 coro_context cctx; 183 coro_context cctx;
99 184
100 void *sptr; 185 U32 gen;
101 long ssize; /* positive == mmap, otherwise malloc */ 186#if CORO_USE_VALGRIND
102} coro_stack; 187 int valgrind_id;
188#endif
189 unsigned char flags;
190} coro_cctx;
103 191
192coro_cctx *cctx_current; /* the currently running cctx */
193
194/*****************************************************************************/
195
196enum {
197 CF_RUNNING = 0x0001, /* coroutine is running */
198 CF_READY = 0x0002, /* coroutine is ready */
199 CF_NEW = 0x0004, /* has never been switched to */
200 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
201 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
202};
203
204/* the structure where most of the perl state is stored, overlaid on the cxstack */
205typedef struct
206{
207 SV *defsv;
208 AV *defav;
209 SV *errsv;
210 SV *irsgv;
211 HV *hinthv;
212#define VAR(name,type) type name;
213# include "state.h"
214#undef VAR
215} perl_slots;
216
217#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
218
219/* this is a structure representing a perl-level coroutine */
104struct coro { 220struct coro {
105 /* the optional C context */ 221 /* the C coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 222 coro_cctx *cctx;
107 void *cursp;
108 int gencnt;
109 223
110 /* optionally saved, might be zero */ 224 /* ready queue */
111 AV *defav; 225 struct coro *next_ready;
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118 226
119 /* the stacks and related info (callchain etc..) */ 227 /* state data */
120 PERL_SI *curstackinfo; 228 struct CoroSLF slf_frame; /* saved slf frame */
121 AV *curstack;
122 AV *mainstack; 229 AV *mainstack;
123 SV **stack_sp; 230 perl_slots *slot; /* basically the saved sp */
124 OP *op;
125 SV **curpad;
126 AV *comppad;
127 CV *compcv;
128 SV **stack_base;
129 SV **stack_max;
130 SV **tmps_stack;
131 I32 tmps_floor;
132 I32 tmps_ix;
133 I32 tmps_max;
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 JMPENV *top_env;
149 231
232 CV *startcv; /* the CV to execute */
150 /* data associated with this coroutine (initial args) */ 233 AV *args; /* data associated with this coroutine (initial args) */
151 AV *args; 234 int refcnt; /* coroutines are refcounted, yes */
235 int flags; /* CF_ flags */
236 HV *hv; /* the perl hash associated with this coro, if any */
237 void (*on_destroy)(pTHX_ struct coro *coro);
238
239 /* statistics */
240 int usecount; /* number of transfers to this coro */
241
242 /* coro process data */
243 int prio;
244 SV *except; /* exception to be thrown */
245 SV *rouse_cb;
246
247 /* async_pool */
248 SV *saved_deffh;
249 SV *invoke_cb;
250 AV *invoke_av;
251
252 /* on_enter/on_leave */
253 AV *on_enter;
254 AV *on_leave;
255
256 /* times */
257 coro_ts t_cpu, t_real;
258
259 /* linked list */
260 struct coro *next, *prev;
152}; 261};
153 262
154typedef struct coro *Coro__State; 263typedef struct coro *Coro__State;
155typedef struct coro *Coro__State_or_hashref; 264typedef struct coro *Coro__State_or_hashref;
156 265
266/* the following variables are effectively part of the perl context */
267/* and get copied between struct coro and these variables */
268/* the mainr easonw e don't support windows process emulation */
269static struct CoroSLF slf_frame; /* the current slf frame */
270
271/** Coro ********************************************************************/
272
273#define CORO_PRIO_MAX 3
274#define CORO_PRIO_HIGH 1
275#define CORO_PRIO_NORMAL 0
276#define CORO_PRIO_LOW -1
277#define CORO_PRIO_IDLE -3
278#define CORO_PRIO_MIN -4
279
280/* for Coro.pm */
281static SV *coro_current;
282static SV *coro_readyhook;
283static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
284static CV *cv_coro_run, *cv_coro_terminate;
285static struct coro *coro_first;
286#define coro_nready coroapi.nready
287
288/** lowlevel stuff **********************************************************/
289
290static SV *
291coro_get_sv (pTHX_ const char *name, int create)
292{
293#if PERL_VERSION_ATLEAST (5,10,0)
294 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
295 get_sv (name, create);
296#endif
297 return get_sv (name, create);
298}
299
157static AV * 300static AV *
301coro_get_av (pTHX_ const char *name, int create)
302{
303#if PERL_VERSION_ATLEAST (5,10,0)
304 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
305 get_av (name, create);
306#endif
307 return get_av (name, create);
308}
309
310static HV *
311coro_get_hv (pTHX_ const char *name, int create)
312{
313#if PERL_VERSION_ATLEAST (5,10,0)
314 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
315 get_hv (name, create);
316#endif
317 return get_hv (name, create);
318}
319
320INLINE void
321coro_times_update ()
322{
323#ifdef coro_clock_gettime
324 struct timespec ts;
325
326 ts.tv_sec = ts.tv_nsec = 0;
327 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
328 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
329
330 ts.tv_sec = ts.tv_nsec = 0;
331 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
332 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
333#else
334 dTHX;
335 UV tv[2];
336
337 u2time (aTHX_ tv);
338 time_real [0] = tv [0];
339 time_real [1] = tv [1] * 1000;
340#endif
341}
342
343INLINE void
344coro_times_add (struct coro *c)
345{
346 c->t_real [1] += time_real [1];
347 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
348 c->t_real [0] += time_real [0];
349
350 c->t_cpu [1] += time_cpu [1];
351 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
352 c->t_cpu [0] += time_cpu [0];
353}
354
355INLINE void
356coro_times_sub (struct coro *c)
357{
358 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
359 c->t_real [1] -= time_real [1];
360 c->t_real [0] -= time_real [0];
361
362 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
363 c->t_cpu [1] -= time_cpu [1];
364 c->t_cpu [0] -= time_cpu [0];
365}
366
367/*****************************************************************************/
368/* magic glue */
369
370#define CORO_MAGIC_type_cv 26
371#define CORO_MAGIC_type_state PERL_MAGIC_ext
372
373#define CORO_MAGIC_NN(sv, type) \
374 (expect_true (SvMAGIC (sv)->mg_type == type) \
375 ? SvMAGIC (sv) \
376 : mg_find (sv, type))
377
378#define CORO_MAGIC(sv, type) \
379 (expect_true (SvMAGIC (sv)) \
380 ? CORO_MAGIC_NN (sv, type) \
381 : 0)
382
383#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
384#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
385
386INLINE struct coro *
387SvSTATE_ (pTHX_ SV *coro)
388{
389 HV *stash;
390 MAGIC *mg;
391
392 if (SvROK (coro))
393 coro = SvRV (coro);
394
395 if (expect_false (SvTYPE (coro) != SVt_PVHV))
396 croak ("Coro::State object required");
397
398 stash = SvSTASH (coro);
399 if (expect_false (stash != coro_stash && stash != coro_state_stash))
400 {
401 /* very slow, but rare, check */
402 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
403 croak ("Coro::State object required");
404 }
405
406 mg = CORO_MAGIC_state (coro);
407 return (struct coro *)mg->mg_ptr;
408}
409
410#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
411
412/* faster than SvSTATE, but expects a coroutine hv */
413#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
414#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
415
416/*****************************************************************************/
417/* padlist management and caching */
418
419static AV *
158coro_clone_padlist (pTHX_ CV *cv) 420coro_derive_padlist (pTHX_ CV *cv)
159{ 421{
160 AV *padlist = CvPADLIST (cv); 422 AV *padlist = CvPADLIST (cv);
161 AV *newpadlist, *newpad; 423 AV *newpadlist, *newpad;
162 424
163 newpadlist = newAV (); 425 newpadlist = newAV ();
164 AvREAL_off (newpadlist); 426 AvREAL_off (newpadlist);
165#if PERL_VERSION < 9 427#if PERL_VERSION_ATLEAST (5,10,0)
428 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
429#else
166 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 430 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167#else
168 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169#endif 431#endif
170 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 432 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171 --AvFILLp (padlist); 433 --AvFILLp (padlist);
172 434
173 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 435 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
174 av_store (newpadlist, 1, (SV *)newpad); 436 av_store (newpadlist, 1, (SV *)newpad);
175 437
176 return newpadlist; 438 return newpadlist;
177} 439}
178 440
179static void 441static void
180free_padlist (pTHX_ AV *padlist) 442free_padlist (pTHX_ AV *padlist)
181{ 443{
182 /* may be during global destruction */ 444 /* may be during global destruction */
183 if (SvREFCNT (padlist)) 445 if (!IN_DESTRUCT)
184 { 446 {
185 I32 i = AvFILLp (padlist); 447 I32 i = AvFILLp (padlist);
186 while (i >= 0) 448
449 while (i > 0) /* special-case index 0 */
187 { 450 {
188 SV **svp = av_fetch (padlist, i--, FALSE); 451 /* we try to be extra-careful here */
189 if (svp) 452 AV *av = (AV *)AvARRAY (padlist)[i--];
190 { 453 I32 j = AvFILLp (av);
191 SV *sv; 454
192 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 455 while (j >= 0)
456 SvREFCNT_dec (AvARRAY (av)[j--]);
457
458 AvFILLp (av) = -1;
193 SvREFCNT_dec (sv); 459 SvREFCNT_dec (av);
194
195 SvREFCNT_dec (*svp);
196 }
197 } 460 }
198 461
462 SvREFCNT_dec (AvARRAY (padlist)[0]);
463
464 AvFILLp (padlist) = -1;
199 SvREFCNT_dec ((SV*)padlist); 465 SvREFCNT_dec ((SV*)padlist);
200 } 466 }
201} 467}
202 468
203static int 469static int
204coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 470coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
205{ 471{
206 AV *padlist; 472 AV *padlist;
207 AV *av = (AV *)mg->mg_obj; 473 AV *av = (AV *)mg->mg_obj;
474
475 /* perl manages to free our internal AV and _then_ call us */
476 if (IN_DESTRUCT)
477 return 0;
208 478
209 /* casting is fun. */ 479 /* casting is fun. */
210 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 480 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
211 free_padlist (aTHX_ padlist); 481 free_padlist (aTHX_ padlist);
212 482
213 SvREFCNT_dec (av); 483 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
214 484
215 return 0; 485 return 0;
216} 486}
217 487
218#define PERL_MAGIC_coro PERL_MAGIC_ext 488static MGVTBL coro_cv_vtbl = {
219 489 0, 0, 0, 0,
220static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 490 coro_cv_free
491};
221 492
222/* the next two functions merely cache the padlists */ 493/* the next two functions merely cache the padlists */
223static void 494static void
224get_padlist (pTHX_ CV *cv) 495get_padlist (pTHX_ CV *cv)
225{ 496{
226 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 497 MAGIC *mg = CORO_MAGIC_cv (cv);
498 AV *av;
227 499
228 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 500 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
229 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 501 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230 else 502 else
231 { 503 {
232#if 0 504#if CORO_PREFER_PERL_FUNCTIONS
233 /* this should work - but it doesn't :( */ 505 /* this is probably cleaner? but also slower! */
506 /* in practise, it seems to be less stable */
234 CV *cp = Perl_cv_clone (aTHX_ cv); 507 CV *cp = Perl_cv_clone (aTHX_ cv);
235 CvPADLIST (cv) = CvPADLIST (cp); 508 CvPADLIST (cv) = CvPADLIST (cp);
236 CvPADLIST (cp) = 0; 509 CvPADLIST (cp) = 0;
237 SvREFCNT_dec (cp); 510 SvREFCNT_dec (cp);
238#else 511#else
239 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 512 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
240#endif 513#endif
241 } 514 }
242} 515}
243 516
244static void 517static void
245put_padlist (pTHX_ CV *cv) 518put_padlist (pTHX_ CV *cv)
246{ 519{
247 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 520 MAGIC *mg = CORO_MAGIC_cv (cv);
521 AV *av;
248 522
249 if (!mg) 523 if (expect_false (!mg))
250 { 524 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
251 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253 mg->mg_virtual = &vtbl_coro;
254 mg->mg_obj = (SV *)newAV ();
255 }
256 525
257 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 526 av = (AV *)mg->mg_obj;
258}
259 527
260#define SB do { 528 if (expect_false (AvFILLp (av) >= AvMAX (av)))
261#define SE } while (0) 529 av_extend (av, AvFILLp (av) + 1);
262 530
263#define LOAD(state) load_state(aTHX_ (state)); 531 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
264#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 532}
265 533
266#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 534/** load & save, init *******************************************************/
267 535
268static void 536static void
537on_enterleave_call (pTHX_ SV *cb);
538
539static void
269load_state(pTHX_ Coro__State c) 540load_perl (pTHX_ Coro__State c)
270{ 541{
271 PL_dowarn = c->dowarn; 542 perl_slots *slot = c->slot;
272 PL_in_eval = c->in_eval; 543 c->slot = 0;
273 544
274 PL_curstackinfo = c->curstackinfo;
275 PL_curstack = c->curstack;
276 PL_mainstack = c->mainstack; 545 PL_mainstack = c->mainstack;
277 PL_stack_sp = c->stack_sp;
278 PL_op = c->op;
279 PL_curpad = c->curpad;
280 PL_comppad = c->comppad;
281 PL_compcv = c->compcv;
282 PL_stack_base = c->stack_base;
283 PL_stack_max = c->stack_max;
284 PL_tmps_stack = c->tmps_stack;
285 PL_tmps_floor = c->tmps_floor;
286 PL_tmps_ix = c->tmps_ix;
287 PL_tmps_max = c->tmps_max;
288 PL_markstack = c->markstack;
289 PL_markstack_ptr = c->markstack_ptr;
290 PL_markstack_max = c->markstack_max;
291 PL_scopestack = c->scopestack;
292 PL_scopestack_ix = c->scopestack_ix;
293 PL_scopestack_max = c->scopestack_max;
294 PL_savestack = c->savestack;
295 PL_savestack_ix = c->savestack_ix;
296 PL_savestack_max = c->savestack_max;
297#if PERL_VERSION < 9
298 PL_retstack = c->retstack;
299 PL_retstack_ix = c->retstack_ix;
300 PL_retstack_max = c->retstack_max;
301#endif
302 PL_curpm = c->curpm;
303 PL_curcop = c->curcop;
304 PL_top_env = c->top_env;
305 546
306 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 547 GvSV (PL_defgv) = slot->defsv;
307 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 548 GvAV (PL_defgv) = slot->defav;
308 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 549 GvSV (PL_errgv) = slot->errsv;
550 GvSV (irsgv) = slot->irsgv;
551 GvHV (PL_hintgv) = slot->hinthv;
552
553 #define VAR(name,type) PL_ ## name = slot->name;
554 # include "state.h"
555 #undef VAR
309 556
310 { 557 {
311 dSP; 558 dSP;
559
312 CV *cv; 560 CV *cv;
313 561
314 /* now do the ugly restore mess */ 562 /* now do the ugly restore mess */
315 while ((cv = (CV *)POPs)) 563 while (expect_true (cv = (CV *)POPs))
316 { 564 {
317 AV *padlist = (AV *)POPs;
318
319 if (padlist)
320 {
321 put_padlist (aTHX_ cv); /* mark this padlist as available */ 565 put_padlist (aTHX_ cv); /* mark this padlist as available */
322 CvPADLIST(cv) = padlist; 566 CvDEPTH (cv) = PTR2IV (POPs);
323 } 567 CvPADLIST (cv) = (AV *)POPs;
324
325 ++CvDEPTH(cv);
326 } 568 }
327 569
328 PUTBACK; 570 PUTBACK;
329 } 571 }
330}
331 572
573 slf_frame = c->slf_frame;
574 CORO_THROW = c->except;
575
576 if (expect_false (enable_times))
577 {
578 if (expect_false (!times_valid))
579 coro_times_update ();
580
581 coro_times_sub (c);
582 }
583
584 if (expect_false (c->on_enter))
585 {
586 int i;
587
588 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
589 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
590 }
591}
592
332static void 593static void
333save_state(pTHX_ Coro__State c, int flags) 594save_perl (pTHX_ Coro__State c)
334{ 595{
596 if (expect_false (c->on_leave))
597 {
598 int i;
599
600 for (i = AvFILLp (c->on_leave); i >= 0; --i)
601 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
602 }
603
604 times_valid = 0;
605
606 if (expect_false (enable_times))
607 {
608 coro_times_update (); times_valid = 1;
609 coro_times_add (c);
610 }
611
612 c->except = CORO_THROW;
613 c->slf_frame = slf_frame;
614
335 { 615 {
336 dSP; 616 dSP;
337 I32 cxix = cxstack_ix; 617 I32 cxix = cxstack_ix;
338 PERL_CONTEXT *ccstk = cxstack; 618 PERL_CONTEXT *ccstk = cxstack;
339 PERL_SI *top_si = PL_curstackinfo; 619 PERL_SI *top_si = PL_curstackinfo;
… …
341 /* 621 /*
342 * the worst thing you can imagine happens first - we have to save 622 * the worst thing you can imagine happens first - we have to save
343 * (and reinitialize) all cv's in the whole callchain :( 623 * (and reinitialize) all cv's in the whole callchain :(
344 */ 624 */
345 625
346 PUSHs (Nullsv); 626 XPUSHs (Nullsv);
347 /* this loop was inspired by pp_caller */ 627 /* this loop was inspired by pp_caller */
348 for (;;) 628 for (;;)
349 { 629 {
350 while (cxix >= 0) 630 while (expect_true (cxix >= 0))
351 { 631 {
352 PERL_CONTEXT *cx = &ccstk[cxix--]; 632 PERL_CONTEXT *cx = &ccstk[cxix--];
353 633
354 if (CxTYPE(cx) == CXt_SUB) 634 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
355 { 635 {
356 CV *cv = cx->blk_sub.cv; 636 CV *cv = cx->blk_sub.cv;
637
357 if (CvDEPTH(cv)) 638 if (expect_true (CvDEPTH (cv)))
358 { 639 {
359 EXTEND (SP, CvDEPTH(cv)*2); 640 EXTEND (SP, 3);
360
361 while (--CvDEPTH(cv))
362 {
363 /* this tells the restore code to increment CvDEPTH */
364 PUSHs (Nullsv);
365 PUSHs ((SV *)cv);
366 }
367
368 PUSHs ((SV *)CvPADLIST(cv)); 641 PUSHs ((SV *)CvPADLIST (cv));
642 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
369 PUSHs ((SV *)cv); 643 PUSHs ((SV *)cv);
370 644
645 CvDEPTH (cv) = 0;
371 get_padlist (aTHX_ cv); 646 get_padlist (aTHX_ cv);
372 } 647 }
373 } 648 }
374#ifdef CXt_FORMAT
375 else if (CxTYPE(cx) == CXt_FORMAT)
376 {
377 /* I never used formats, so how should I know how these are implemented? */
378 /* my bold guess is as a simple, plain sub... */
379 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380 }
381#endif
382 } 649 }
383 650
384 if (top_si->si_type == PERLSI_MAIN) 651 if (expect_true (top_si->si_type == PERLSI_MAIN))
385 break; 652 break;
386 653
387 top_si = top_si->si_prev; 654 top_si = top_si->si_prev;
388 ccstk = top_si->si_cxstack; 655 ccstk = top_si->si_cxstack;
389 cxix = top_si->si_cxix; 656 cxix = top_si->si_cxix;
390 } 657 }
391 658
392 PUTBACK; 659 PUTBACK;
393 } 660 }
394 661
395 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 662 /* allocate some space on the context stack for our purposes */
396 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 663 /* we manually unroll here, as usually 2 slots is enough */
397 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 664 if (SLOT_COUNT >= 1) CXINC;
665 if (SLOT_COUNT >= 2) CXINC;
666 if (SLOT_COUNT >= 3) CXINC;
667 {
668 unsigned int i;
669 for (i = 3; i < SLOT_COUNT; ++i)
670 CXINC;
671 }
672 cxstack_ix -= SLOT_COUNT; /* undo allocation */
398 673
399 c->dowarn = PL_dowarn;
400 c->in_eval = PL_in_eval;
401
402 c->curstackinfo = PL_curstackinfo;
403 c->curstack = PL_curstack;
404 c->mainstack = PL_mainstack; 674 c->mainstack = PL_mainstack;
405 c->stack_sp = PL_stack_sp; 675
406 c->op = PL_op; 676 {
407 c->curpad = PL_curpad; 677 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408 c->comppad = PL_comppad; 678
409 c->compcv = PL_compcv; 679 slot->defav = GvAV (PL_defgv);
410 c->stack_base = PL_stack_base; 680 slot->defsv = DEFSV;
411 c->stack_max = PL_stack_max; 681 slot->errsv = ERRSV;
412 c->tmps_stack = PL_tmps_stack; 682 slot->irsgv = GvSV (irsgv);
413 c->tmps_floor = PL_tmps_floor; 683 slot->hinthv = GvHV (PL_hintgv);
414 c->tmps_ix = PL_tmps_ix; 684
415 c->tmps_max = PL_tmps_max; 685 #define VAR(name,type) slot->name = PL_ ## name;
416 c->markstack = PL_markstack; 686 # include "state.h"
417 c->markstack_ptr = PL_markstack_ptr; 687 #undef VAR
418 c->markstack_max = PL_markstack_max; 688 }
419 c->scopestack = PL_scopestack;
420 c->scopestack_ix = PL_scopestack_ix;
421 c->scopestack_max = PL_scopestack_max;
422 c->savestack = PL_savestack;
423 c->savestack_ix = PL_savestack_ix;
424 c->savestack_max = PL_savestack_max;
425#if PERL_VERSION < 9
426 c->retstack = PL_retstack;
427 c->retstack_ix = PL_retstack_ix;
428 c->retstack_max = PL_retstack_max;
429#endif
430 c->curpm = PL_curpm;
431 c->curcop = PL_curcop;
432 c->top_env = PL_top_env;
433} 689}
434 690
435/* 691/*
436 * allocate various perl stacks. This is an exact copy 692 * allocate various perl stacks. This is almost an exact copy
437 * of perl.c:init_stacks, except that it uses less memory 693 * of perl.c:init_stacks, except that it uses less memory
438 * on the (sometimes correct) assumption that coroutines do 694 * on the (sometimes correct) assumption that coroutines do
439 * not usually need a lot of stackspace. 695 * not usually need a lot of stackspace.
440 */ 696 */
697#if CORO_PREFER_PERL_FUNCTIONS
698# define coro_init_stacks(thx) init_stacks ()
699#else
441static void 700static void
442coro_init_stacks (pTHX) 701coro_init_stacks (pTHX)
443{ 702{
444 LOCK; 703 PL_curstackinfo = new_stackinfo(32, 8);
445
446 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
447 PL_curstackinfo->si_type = PERLSI_MAIN; 704 PL_curstackinfo->si_type = PERLSI_MAIN;
448 PL_curstack = PL_curstackinfo->si_stack; 705 PL_curstack = PL_curstackinfo->si_stack;
449 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 706 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450 707
451 PL_stack_base = AvARRAY(PL_curstack); 708 PL_stack_base = AvARRAY(PL_curstack);
452 PL_stack_sp = PL_stack_base; 709 PL_stack_sp = PL_stack_base;
453 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 710 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
454 711
455 New(50,PL_tmps_stack,96,SV*); 712 New(50,PL_tmps_stack,32,SV*);
456 PL_tmps_floor = -1; 713 PL_tmps_floor = -1;
457 PL_tmps_ix = -1; 714 PL_tmps_ix = -1;
458 PL_tmps_max = 96; 715 PL_tmps_max = 32;
459 716
460 New(54,PL_markstack,16,I32); 717 New(54,PL_markstack,16,I32);
461 PL_markstack_ptr = PL_markstack; 718 PL_markstack_ptr = PL_markstack;
462 PL_markstack_max = PL_markstack + 16; 719 PL_markstack_max = PL_markstack + 16;
463 720
464#ifdef SET_MARK_OFFSET 721#ifdef SET_MARK_OFFSET
465 SET_MARK_OFFSET; 722 SET_MARK_OFFSET;
466#endif 723#endif
467 724
468 New(54,PL_scopestack,16,I32); 725 New(54,PL_scopestack,8,I32);
469 PL_scopestack_ix = 0; 726 PL_scopestack_ix = 0;
470 PL_scopestack_max = 16; 727 PL_scopestack_max = 8;
471 728
472 New(54,PL_savestack,96,ANY); 729 New(54,PL_savestack,24,ANY);
473 PL_savestack_ix = 0; 730 PL_savestack_ix = 0;
474 PL_savestack_max = 96; 731 PL_savestack_max = 24;
475 732
476#if PERL_VERSION < 9 733#if !PERL_VERSION_ATLEAST (5,10,0)
477 New(54,PL_retstack,8,OP*); 734 New(54,PL_retstack,4,OP*);
478 PL_retstack_ix = 0; 735 PL_retstack_ix = 0;
479 PL_retstack_max = 8; 736 PL_retstack_max = 4;
480#endif 737#endif
481
482 UNLOCK;
483} 738}
739#endif
484 740
485/* 741/*
486 * destroy the stacks, the callchain etc... 742 * destroy the stacks, the callchain etc...
487 */ 743 */
488static void 744static void
489destroy_stacks(pTHX) 745coro_destruct_stacks (pTHX)
490{ 746{
491 if (!IN_DESTRUCT)
492 {
493 /* is this ugly, I ask? */
494 LEAVE_SCOPE (0);
495
496 /* sure it is, but more important: is it correct?? :/ */
497 FREETMPS;
498
499 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
500 }
501
502 while (PL_curstackinfo->si_next) 747 while (PL_curstackinfo->si_next)
503 PL_curstackinfo = PL_curstackinfo->si_next; 748 PL_curstackinfo = PL_curstackinfo->si_next;
504 749
505 while (PL_curstackinfo) 750 while (PL_curstackinfo)
506 { 751 {
507 PERL_SI *p = PL_curstackinfo->si_prev; 752 PERL_SI *p = PL_curstackinfo->si_prev;
508 753
509 { /*D*//*remove*/
510 dSP;
511 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
512 PUTBACK; /* possibly superfluous */
513 }
514
515 if (!IN_DESTRUCT) 754 if (!IN_DESTRUCT)
516 {
517 dounwind (-1);/*D*//*remove*/
518 SvREFCNT_dec (PL_curstackinfo->si_stack); 755 SvREFCNT_dec (PL_curstackinfo->si_stack);
519 }
520 756
521 Safefree (PL_curstackinfo->si_cxstack); 757 Safefree (PL_curstackinfo->si_cxstack);
522 Safefree (PL_curstackinfo); 758 Safefree (PL_curstackinfo);
523 PL_curstackinfo = p; 759 PL_curstackinfo = p;
524 } 760 }
525 761
526 Safefree (PL_tmps_stack); 762 Safefree (PL_tmps_stack);
527 Safefree (PL_markstack); 763 Safefree (PL_markstack);
528 Safefree (PL_scopestack); 764 Safefree (PL_scopestack);
529 Safefree (PL_savestack); 765 Safefree (PL_savestack);
530#if PERL_VERSION < 9 766#if !PERL_VERSION_ATLEAST (5,10,0)
531 Safefree (PL_retstack); 767 Safefree (PL_retstack);
532#endif 768#endif
533} 769}
534 770
535static void 771#define CORO_RSS \
536allocate_stack (Coro__State ctx, int alloc) 772 rss += sizeof (SYM (curstackinfo)); \
537{ 773 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
538 coro_stack *stack; 774 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
775 rss += SYM (tmps_max) * sizeof (SV *); \
776 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
777 rss += SYM (scopestack_max) * sizeof (I32); \
778 rss += SYM (savestack_max) * sizeof (ANY);
539 779
540 New (0, stack, 1, coro_stack); 780static size_t
781coro_rss (pTHX_ struct coro *coro)
782{
783 size_t rss = sizeof (*coro);
541 784
542 stack->refcnt = 1; 785 if (coro->mainstack)
543 stack->usecnt = 1;
544 stack->gencnt = ctx->gencnt = 0;
545
546 if (alloc)
547 { 786 {
548#if HAVE_MMAP 787 if (coro->flags & CF_RUNNING)
549 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
550 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
551 if (stack->sptr != (void *)-1)
552 { 788 {
553# if STACKGUARD 789 #define SYM(sym) PL_ ## sym
554 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 790 CORO_RSS;
555# endif 791 #undef SYM
556 } 792 }
557 else 793 else
794 {
795 #define SYM(sym) coro->slot->sym
796 CORO_RSS;
797 #undef SYM
798 }
799 }
800
801 return rss;
802}
803
804/** coroutine stack handling ************************************************/
805
806static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
807static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
808static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
809
810/* apparently < 5.8.8 */
811#ifndef MgPV_nolen_const
812#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
813 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
814 (const char*)(mg)->mg_ptr)
558#endif 815#endif
816
817/*
818 * This overrides the default magic get method of %SIG elements.
819 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
820 * and instead of trying to save and restore the hash elements, we just provide
821 * readback here.
822 */
823static int
824coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
825{
826 const char *s = MgPV_nolen_const (mg);
827
828 if (*s == '_')
829 {
830 SV **svp = 0;
831
832 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
833 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
834
835 if (svp)
559 { 836 {
560 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 837 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
561 New (0, stack->sptr, STACKSIZE, long); 838 return 0;
562 } 839 }
563 } 840 }
564 else
565 stack->sptr = 0;
566 841
567 ctx->stack = stack; 842 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
568} 843}
569 844
570static void 845static int
571deallocate_stack (Coro__State ctx) 846coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
572{ 847{
573 coro_stack *stack = ctx->stack; 848 const char *s = MgPV_nolen_const (mg);
574 849
575 ctx->stack = 0; 850 if (*s == '_')
576
577 if (stack)
578 { 851 {
579 if (!--stack->refcnt) 852 SV **svp = 0;
853
854 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
855 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
856
857 if (svp)
580 { 858 {
581#ifdef HAVE_MMAP 859 SV *old = *svp;
582 if (stack->ssize > 0 && stack->sptr) 860 *svp = 0;
583 munmap (stack->sptr, stack->ssize); 861 SvREFCNT_dec (old);
584 else 862 return 0;
585#endif
586 Safefree (stack->sptr);
587
588 Safefree (stack);
589 } 863 }
590 else if (ctx->gencnt == stack->gencnt) 864 }
591 --stack->usecnt; 865
866 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
867}
868
869static int
870coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
871{
872 const char *s = MgPV_nolen_const (mg);
873
874 if (*s == '_')
592 } 875 {
593} 876 SV **svp = 0;
594 877
878 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
879 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
880
881 if (svp)
882 {
883 SV *old = *svp;
884 *svp = SvOK (sv) ? newSVsv (sv) : 0;
885 SvREFCNT_dec (old);
886 return 0;
887 }
888 }
889
890 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
891}
892
893static void
894prepare_nop (pTHX_ struct coro_transfer_args *ta)
895{
896 /* kind of mega-hacky, but works */
897 ta->next = ta->prev = (struct coro *)ta;
898}
899
595static void 900static int
596setup_coro (void *arg) 901slf_check_nop (pTHX_ struct CoroSLF *frame)
902{
903 return 0;
904}
905
906static int
907slf_check_repeat (pTHX_ struct CoroSLF *frame)
908{
909 return 1;
910}
911
912static UNOP coro_setup_op;
913
914static void NOINLINE /* noinline to keep it out of the transfer fast path */
915coro_setup (pTHX_ struct coro *coro)
597{ 916{
598 /* 917 /*
599 * emulate part of the perl startup here. 918 * emulate part of the perl startup here.
600 */ 919 */
601 dTHX;
602 dSP;
603 Coro__State ctx = (Coro__State)arg;
604 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605
606 coro_init_stacks (aTHX); 920 coro_init_stacks (aTHX);
607 /*PL_curcop = 0;*/ 921
608 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 922 PL_runops = RUNOPS_DEFAULT;
609 SvREFCNT_dec (GvAV (PL_defgv)); 923 PL_curcop = &PL_compiling;
924 PL_in_eval = EVAL_NULL;
925 PL_comppad = 0;
926 PL_comppad_name = 0;
927 PL_comppad_name_fill = 0;
928 PL_comppad_name_floor = 0;
929 PL_curpm = 0;
930 PL_curpad = 0;
931 PL_localizing = 0;
932 PL_dirty = 0;
933 PL_restartop = 0;
934#if PERL_VERSION_ATLEAST (5,10,0)
935 PL_parser = 0;
936#endif
937 PL_hints = 0;
938
939 /* recreate the die/warn hooks */
940 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
941 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
942
943 GvSV (PL_defgv) = newSV (0);
610 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 944 GvAV (PL_defgv) = coro->args; coro->args = 0;
945 GvSV (PL_errgv) = newSV (0);
946 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
947 GvHV (PL_hintgv) = 0;
948 PL_rs = newSVsv (GvSV (irsgv));
949 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
611 950
612 SPAGAIN; 951 {
952 dSP;
953 UNOP myop;
613 954
955 Zero (&myop, 1, UNOP);
956 myop.op_next = Nullop;
957 myop.op_type = OP_ENTERSUB;
958 myop.op_flags = OPf_WANT_VOID;
959
960 PUSHMARK (SP);
961 PUSHs ((SV *)coro->startcv);
962 PUTBACK;
963 PL_op = (OP *)&myop;
964 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
965 }
966
967 /* this newly created coroutine might be run on an existing cctx which most
968 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
969 */
970 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
971 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
972
973 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
974 coro_setup_op.op_next = PL_op;
975 coro_setup_op.op_type = OP_ENTERSUB;
976 coro_setup_op.op_ppaddr = pp_slf;
977 /* no flags etc. required, as an init function won't be called */
978
979 PL_op = (OP *)&coro_setup_op;
980
981 /* copy throw, in case it was set before coro_setup */
982 CORO_THROW = coro->except;
983
984 if (expect_false (enable_times))
985 {
986 coro_times_update ();
987 coro_times_sub (coro);
988 }
989}
990
991static void
992coro_unwind_stacks (pTHX)
993{
994 if (!IN_DESTRUCT)
995 {
996 /* restore all saved variables and stuff */
997 LEAVE_SCOPE (0);
998 assert (PL_tmps_floor == -1);
999
1000 /* free all temporaries */
1001 FREETMPS;
1002 assert (PL_tmps_ix == -1);
1003
1004 /* unwind all extra stacks */
1005 POPSTACK_TO (PL_mainstack);
1006
1007 /* unwind main stack */
1008 dounwind (-1);
1009 }
1010}
1011
1012static void
1013coro_destruct_perl (pTHX_ struct coro *coro)
1014{
1015 SV *svf [9];
1016
1017 {
1018 struct coro *current = SvSTATE_current;
1019
1020 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1021
1022 save_perl (aTHX_ current);
1023 load_perl (aTHX_ coro);
1024
1025 coro_unwind_stacks (aTHX);
1026 coro_destruct_stacks (aTHX);
1027
1028 // now save some sv's to be free'd later
1029 svf [0] = GvSV (PL_defgv);
1030 svf [1] = (SV *)GvAV (PL_defgv);
1031 svf [2] = GvSV (PL_errgv);
1032 svf [3] = (SV *)PL_defoutgv;
1033 svf [4] = PL_rs;
1034 svf [5] = GvSV (irsgv);
1035 svf [6] = (SV *)GvHV (PL_hintgv);
1036 svf [7] = PL_diehook;
1037 svf [8] = PL_warnhook;
1038 assert (9 == sizeof (svf) / sizeof (*svf));
1039
1040 load_perl (aTHX_ current);
1041 }
1042
1043 {
1044 unsigned int i;
1045
1046 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1047 SvREFCNT_dec (svf [i]);
1048
1049 SvREFCNT_dec (coro->saved_deffh);
1050 SvREFCNT_dec (coro->rouse_cb);
1051 SvREFCNT_dec (coro->invoke_cb);
1052 SvREFCNT_dec (coro->invoke_av);
1053 }
1054}
1055
1056INLINE void
1057free_coro_mortal (pTHX)
1058{
1059 if (expect_true (coro_mortal))
1060 {
1061 SvREFCNT_dec (coro_mortal);
1062 coro_mortal = 0;
1063 }
1064}
1065
1066static int
1067runops_trace (pTHX)
1068{
1069 COP *oldcop = 0;
1070 int oldcxix = -2;
1071
1072 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1073 {
1074 PERL_ASYNC_CHECK ();
1075
1076 if (cctx_current->flags & CC_TRACE_ALL)
1077 {
1078 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1079 {
1080 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1081 SV **bot, **top;
1082 AV *av = newAV (); /* return values */
1083 SV **cb;
1084 dSP;
1085
1086 GV *gv = CvGV (cx->blk_sub.cv);
1087 SV *fullname = sv_2mortal (newSV (0));
1088 if (isGV (gv))
1089 gv_efullname3 (fullname, gv, 0);
1090
1091 bot = PL_stack_base + cx->blk_oldsp + 1;
1092 top = cx->blk_gimme == G_ARRAY ? SP + 1
1093 : cx->blk_gimme == G_SCALAR ? bot + 1
1094 : bot;
1095
1096 av_extend (av, top - bot);
1097 while (bot < top)
1098 av_push (av, SvREFCNT_inc_NN (*bot++));
1099
1100 PL_runops = RUNOPS_DEFAULT;
1101 ENTER;
1102 SAVETMPS;
1103 EXTEND (SP, 3);
1104 PUSHMARK (SP);
1105 PUSHs (&PL_sv_no);
1106 PUSHs (fullname);
1107 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1108 PUTBACK;
1109 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1110 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1111 SPAGAIN;
1112 FREETMPS;
1113 LEAVE;
1114 PL_runops = runops_trace;
1115 }
1116
1117 if (oldcop != PL_curcop)
1118 {
1119 oldcop = PL_curcop;
1120
1121 if (PL_curcop != &PL_compiling)
1122 {
1123 SV **cb;
1124
1125 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1126 {
1127 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1128
1129 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1130 {
1131 dSP;
1132 GV *gv = CvGV (cx->blk_sub.cv);
1133 SV *fullname = sv_2mortal (newSV (0));
1134
1135 if (isGV (gv))
1136 gv_efullname3 (fullname, gv, 0);
1137
1138 PL_runops = RUNOPS_DEFAULT;
1139 ENTER;
1140 SAVETMPS;
1141 EXTEND (SP, 3);
1142 PUSHMARK (SP);
1143 PUSHs (&PL_sv_yes);
1144 PUSHs (fullname);
1145 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1146 PUTBACK;
1147 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1148 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1149 SPAGAIN;
1150 FREETMPS;
1151 LEAVE;
1152 PL_runops = runops_trace;
1153 }
1154
1155 oldcxix = cxstack_ix;
1156 }
1157
1158 if (cctx_current->flags & CC_TRACE_LINE)
1159 {
1160 dSP;
1161
1162 PL_runops = RUNOPS_DEFAULT;
1163 ENTER;
1164 SAVETMPS;
1165 EXTEND (SP, 3);
1166 PL_runops = RUNOPS_DEFAULT;
1167 PUSHMARK (SP);
1168 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1169 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1170 PUTBACK;
1171 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1172 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1173 SPAGAIN;
1174 FREETMPS;
1175 LEAVE;
1176 PL_runops = runops_trace;
1177 }
1178 }
1179 }
1180 }
1181 }
1182
1183 TAINT_NOT;
1184 return 0;
1185}
1186
1187static struct CoroSLF cctx_ssl_frame;
1188
1189static void
1190slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1191{
1192 ta->prev = 0;
1193}
1194
1195static int
1196slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1197{
1198 *frame = cctx_ssl_frame;
1199
1200 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1201}
1202
1203/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1204static void NOINLINE
1205cctx_prepare (pTHX)
1206{
1207 PL_top_env = &PL_start_env;
1208
1209 if (cctx_current->flags & CC_TRACE)
1210 PL_runops = runops_trace;
1211
1212 /* we already must be executing an SLF op, there is no other valid way
1213 * that can lead to creation of a new cctx */
1214 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1215 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1216
1217 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1218 cctx_ssl_frame = slf_frame;
1219
1220 slf_frame.prepare = slf_prepare_set_stacklevel;
1221 slf_frame.check = slf_check_set_stacklevel;
1222}
1223
1224/* the tail of transfer: execute stuff we can only do after a transfer */
1225INLINE void
1226transfer_tail (pTHX)
1227{
1228 free_coro_mortal (aTHX);
1229}
1230
1231/*
1232 * this is a _very_ stripped down perl interpreter ;)
1233 */
1234static void
1235cctx_run (void *arg)
1236{
1237#ifdef USE_ITHREADS
1238# if CORO_PTHREAD
1239 PERL_SET_CONTEXT (coro_thx);
1240# endif
1241#endif
1242 {
1243 dTHX;
1244
1245 /* normally we would need to skip the entersub here */
1246 /* not doing so will re-execute it, which is exactly what we want */
1247 /* PL_nop = PL_nop->op_next */
1248
1249 /* inject a fake subroutine call to cctx_init */
1250 cctx_prepare (aTHX);
1251
1252 /* cctx_run is the alternative tail of transfer() */
1253 transfer_tail (aTHX);
1254
1255 /* somebody or something will hit me for both perl_run and PL_restartop */
1256 PL_restartop = PL_op;
1257 perl_run (PL_curinterp);
1258 /*
1259 * Unfortunately, there is no way to get at the return values of the
1260 * coro body here, as perl_run destroys these
1261 */
1262
1263 /*
1264 * If perl-run returns we assume exit() was being called or the coro
1265 * fell off the end, which seems to be the only valid (non-bug)
1266 * reason for perl_run to return. We try to exit by jumping to the
1267 * bootstrap-time "top" top_env, as we cannot restore the "main"
1268 * coroutine as Coro has no such concept.
1269 * This actually isn't valid with the pthread backend, but OSes requiring
1270 * that backend are too broken to do it in a standards-compliant way.
1271 */
1272 PL_top_env = main_top_env;
1273 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1274 }
1275}
1276
1277static coro_cctx *
1278cctx_new ()
1279{
1280 coro_cctx *cctx;
1281
1282 ++cctx_count;
1283 New (0, cctx, 1, coro_cctx);
1284
1285 cctx->gen = cctx_gen;
1286 cctx->flags = 0;
1287 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1288
1289 return cctx;
1290}
1291
1292/* create a new cctx only suitable as source */
1293static coro_cctx *
1294cctx_new_empty ()
1295{
1296 coro_cctx *cctx = cctx_new ();
1297
1298 cctx->sptr = 0;
1299 coro_create (&cctx->cctx, 0, 0, 0, 0);
1300
1301 return cctx;
1302}
1303
1304/* create a new cctx suitable as destination/running a perl interpreter */
1305static coro_cctx *
1306cctx_new_run ()
1307{
1308 coro_cctx *cctx = cctx_new ();
1309 void *stack_start;
1310 size_t stack_size;
1311
1312#if HAVE_MMAP
1313 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1314 /* mmap supposedly does allocate-on-write for us */
1315 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1316
1317 if (cctx->sptr != (void *)-1)
1318 {
1319 #if CORO_STACKGUARD
1320 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1321 #endif
1322 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1323 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1324 cctx->flags |= CC_MAPPED;
1325 }
1326 else
1327#endif
1328 {
1329 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1330 New (0, cctx->sptr, cctx_stacksize, long);
1331
1332 if (!cctx->sptr)
1333 {
1334 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1335 _exit (EXIT_FAILURE);
1336 }
1337
1338 stack_start = cctx->sptr;
1339 stack_size = cctx->ssize;
1340 }
1341
1342 #if CORO_USE_VALGRIND
1343 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1344 #endif
1345
1346 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1347
1348 return cctx;
1349}
1350
1351static void
1352cctx_destroy (coro_cctx *cctx)
1353{
1354 if (!cctx)
1355 return;
1356
1357 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1358
1359 --cctx_count;
1360 coro_destroy (&cctx->cctx);
1361
1362 /* coro_transfer creates new, empty cctx's */
614 if (ctx->stack) 1363 if (cctx->sptr)
1364 {
1365 #if CORO_USE_VALGRIND
1366 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1367 #endif
1368
1369#if HAVE_MMAP
1370 if (cctx->flags & CC_MAPPED)
1371 munmap (cctx->sptr, cctx->ssize);
1372 else
1373#endif
1374 Safefree (cctx->sptr);
615 { 1375 }
616 ctx->cursp = 0;
617 1376
1377 Safefree (cctx);
1378}
1379
1380/* wether this cctx should be destructed */
1381#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1382
1383static coro_cctx *
1384cctx_get (pTHX)
1385{
1386 while (expect_true (cctx_first))
1387 {
1388 coro_cctx *cctx = cctx_first;
1389 cctx_first = cctx->next;
1390 --cctx_idle;
1391
1392 if (expect_true (!CCTX_EXPIRED (cctx)))
1393 return cctx;
1394
1395 cctx_destroy (cctx);
1396 }
1397
1398 return cctx_new_run ();
1399}
1400
1401static void
1402cctx_put (coro_cctx *cctx)
1403{
1404 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1405
1406 /* free another cctx if overlimit */
1407 if (expect_false (cctx_idle >= cctx_max_idle))
1408 {
1409 coro_cctx *first = cctx_first;
1410 cctx_first = first->next;
1411 --cctx_idle;
1412
1413 cctx_destroy (first);
1414 }
1415
1416 ++cctx_idle;
1417 cctx->next = cctx_first;
1418 cctx_first = cctx;
1419}
1420
1421/** coroutine switching *****************************************************/
1422
1423static void
1424transfer_check (pTHX_ struct coro *prev, struct coro *next)
1425{
1426 /* TODO: throwing up here is considered harmful */
1427
1428 if (expect_true (prev != next))
1429 {
1430 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1431 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1432
1433 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1434 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1435
1436#if !PERL_VERSION_ATLEAST (5,10,0)
1437 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1438 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1439#endif
1440 }
1441}
1442
1443/* always use the TRANSFER macro */
1444static void NOINLINE /* noinline so we have a fixed stackframe */
1445transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1446{
1447 dSTACKLEVEL;
1448
1449 /* sometimes transfer is only called to set idle_sp */
1450 if (expect_false (!prev))
1451 {
1452 cctx_current->idle_sp = STACKLEVEL;
1453 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1454 }
1455 else if (expect_true (prev != next))
1456 {
1457 coro_cctx *cctx_prev;
1458
1459 if (expect_false (prev->flags & CF_NEW))
1460 {
1461 /* create a new empty/source context */
1462 prev->flags &= ~CF_NEW;
1463 prev->flags |= CF_RUNNING;
1464 }
1465
1466 prev->flags &= ~CF_RUNNING;
1467 next->flags |= CF_RUNNING;
1468
1469 /* first get rid of the old state */
1470 save_perl (aTHX_ prev);
1471
1472 if (expect_false (next->flags & CF_NEW))
1473 {
1474 /* need to start coroutine */
1475 next->flags &= ~CF_NEW;
1476 /* setup coroutine call */
1477 coro_setup (aTHX_ next);
1478 }
1479 else
1480 load_perl (aTHX_ next);
1481
1482 /* possibly untie and reuse the cctx */
1483 if (expect_true (
1484 cctx_current->idle_sp == STACKLEVEL
1485 && !(cctx_current->flags & CC_TRACE)
1486 && !force_cctx
1487 ))
1488 {
1489 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1490 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1491
1492 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1493 /* without this the next cctx_get might destroy the running cctx while still in use */
1494 if (expect_false (CCTX_EXPIRED (cctx_current)))
1495 if (expect_true (!next->cctx))
1496 next->cctx = cctx_get (aTHX);
1497
1498 cctx_put (cctx_current);
1499 }
1500 else
1501 prev->cctx = cctx_current;
1502
1503 ++next->usecount;
1504
1505 cctx_prev = cctx_current;
1506 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1507
1508 next->cctx = 0;
1509
1510 if (expect_false (cctx_prev != cctx_current))
1511 {
1512 cctx_prev->top_env = PL_top_env;
1513 PL_top_env = cctx_current->top_env;
1514 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1515 }
1516
1517 transfer_tail (aTHX);
1518 }
1519}
1520
1521#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1522#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1523
1524/** high level stuff ********************************************************/
1525
1526static int
1527coro_state_destroy (pTHX_ struct coro *coro)
1528{
1529 if (coro->flags & CF_DESTROYED)
1530 return 0;
1531
1532 if (coro->on_destroy && !PL_dirty)
1533 coro->on_destroy (aTHX_ coro);
1534
1535 coro->flags |= CF_DESTROYED;
1536
1537 if (coro->flags & CF_READY)
1538 {
1539 /* reduce nready, as destroying a ready coro effectively unreadies it */
1540 /* alternative: look through all ready queues and remove the coro */
1541 --coro_nready;
1542 }
1543 else
1544 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1545
1546 if (coro->mainstack
1547 && coro->mainstack != main_mainstack
1548 && coro->slot
1549 && !PL_dirty)
1550 coro_destruct_perl (aTHX_ coro);
1551
1552 cctx_destroy (coro->cctx);
1553 SvREFCNT_dec (coro->startcv);
1554 SvREFCNT_dec (coro->args);
1555 SvREFCNT_dec (CORO_THROW);
1556
1557 if (coro->next) coro->next->prev = coro->prev;
1558 if (coro->prev) coro->prev->next = coro->next;
1559 if (coro == coro_first) coro_first = coro->next;
1560
1561 return 1;
1562}
1563
1564static int
1565coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1566{
1567 struct coro *coro = (struct coro *)mg->mg_ptr;
1568 mg->mg_ptr = 0;
1569
1570 coro->hv = 0;
1571
1572 if (--coro->refcnt < 0)
1573 {
1574 coro_state_destroy (aTHX_ coro);
1575 Safefree (coro);
1576 }
1577
1578 return 0;
1579}
1580
1581static int
1582coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1583{
1584 struct coro *coro = (struct coro *)mg->mg_ptr;
1585
1586 ++coro->refcnt;
1587
1588 return 0;
1589}
1590
1591static MGVTBL coro_state_vtbl = {
1592 0, 0, 0, 0,
1593 coro_state_free,
1594 0,
1595#ifdef MGf_DUP
1596 coro_state_dup,
1597#else
1598# define MGf_DUP 0
1599#endif
1600};
1601
1602static void
1603prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1604{
1605 ta->prev = SvSTATE (prev_sv);
1606 ta->next = SvSTATE (next_sv);
1607 TRANSFER_CHECK (*ta);
1608}
1609
1610static void
1611api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1612{
1613 struct coro_transfer_args ta;
1614
1615 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1616 TRANSFER (ta, 1);
1617}
1618
1619/** Coro ********************************************************************/
1620
1621INLINE void
1622coro_enq (pTHX_ struct coro *coro)
1623{
1624 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1625
1626 SvREFCNT_inc_NN (coro->hv);
1627
1628 coro->next_ready = 0;
1629 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1630 ready [1] = coro;
1631}
1632
1633INLINE struct coro *
1634coro_deq (pTHX)
1635{
1636 int prio;
1637
1638 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1639 {
1640 struct coro **ready = coro_ready [prio];
1641
1642 if (ready [0])
1643 {
1644 struct coro *coro = ready [0];
1645 ready [0] = coro->next_ready;
1646 return coro;
1647 }
1648 }
1649
1650 return 0;
1651}
1652
1653static int
1654api_ready (pTHX_ SV *coro_sv)
1655{
1656 struct coro *coro;
1657 SV *sv_hook;
1658 void (*xs_hook)(void);
1659
1660 coro = SvSTATE (coro_sv);
1661
1662 if (coro->flags & CF_READY)
1663 return 0;
1664
1665 coro->flags |= CF_READY;
1666
1667 sv_hook = coro_nready ? 0 : coro_readyhook;
1668 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1669
1670 coro_enq (aTHX_ coro);
1671 ++coro_nready;
1672
1673 if (sv_hook)
1674 {
1675 dSP;
1676
1677 ENTER;
1678 SAVETMPS;
1679
618 PUSHMARK(SP); 1680 PUSHMARK (SP);
619 PUTBACK; 1681 PUTBACK;
620 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1682 call_sv (sv_hook, G_VOID | G_DISCARD);
621 1683
622 if (SvTRUE (ERRSV)) 1684 FREETMPS;
623 croak (NULL); 1685 LEAVE;
624 else
625 croak ("FATAL: CCTXT coroutine returned!");
626 }
627 else
628 { 1686 }
629 UNOP myop;
630 1687
631 Zero(&myop, 1, UNOP); 1688 if (xs_hook)
632 myop.op_next = Nullop; 1689 xs_hook ();
633 myop.op_flags = OPf_WANT_VOID;
634 1690
635 PL_op = (OP *)&myop; 1691 return 1;
1692}
636 1693
637 PUSHMARK(SP); 1694static int
638 XPUSHs (sub_init); 1695api_is_ready (pTHX_ SV *coro_sv)
639 /* 1696{
640 * the next line is slightly wrong, as PL_op->op_next 1697 return !!(SvSTATE (coro_sv)->flags & CF_READY);
641 * is actually being executed so we skip the first op. 1698}
642 * that doesn't matter, though, since it is only
643 * pp_nextstate and we never return...
644 * ah yes, and I don't care anyways ;)
645 */
646 PUTBACK;
647 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648 SPAGAIN;
649 1699
650 ENTER; /* necessary e.g. for dounwind */ 1700/* expects to own a reference to next->hv */
1701INLINE void
1702prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1703{
1704 SV *prev_sv = SvRV (coro_current);
1705
1706 ta->prev = SvSTATE_hv (prev_sv);
1707 ta->next = next;
1708
1709 TRANSFER_CHECK (*ta);
1710
1711 SvRV_set (coro_current, (SV *)next->hv);
1712
1713 free_coro_mortal (aTHX);
1714 coro_mortal = prev_sv;
1715}
1716
1717static void
1718prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1719{
1720 for (;;)
651 } 1721 {
652} 1722 struct coro *next = coro_deq (aTHX);
653 1723
654static void 1724 if (expect_true (next))
655continue_coro (void *arg)
656{
657 /*
658 * this is a _very_ stripped down perl interpreter ;)
659 */
660 dTHX;
661 Coro__State ctx = (Coro__State)arg;
662
663 PL_top_env = &PL_start_env;
664
665 ctx->cursp = 0;
666 PL_op = PL_op->op_next;
667 CALLRUNOPS(aTHX);
668
669 abort ();
670}
671
672/* never call directly, always through the coro_state_transfer global variable */
673static void
674transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
675{
676 dSTACKLEVEL;
677
678 if (prev != next)
679 {
680 /* has this coro been created yet? */
681 if (next->mainstack)
682 { 1725 {
683 LOCK; 1726 /* cannot transfer to destroyed coros, skip and look for next */
684 SAVE (prev, flags); 1727 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
685 LOAD (next); 1728 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
686 UNLOCK; 1729 else
687
688 /* mark this state as in-use */
689 next->mainstack = 0;
690 next->tmps_ix = -2;
691
692 /* stacklevel changed? if yes, grab the stack for us! */
693 if (flags & TRANSFER_SAVE_CCTXT)
694 { 1730 {
695 if (!prev->stack) 1731 next->flags &= ~CF_READY;
696 allocate_stack (prev, 0); 1732 --coro_nready;
697 else if (prev->cursp != stacklevel 1733
698 && prev->stack->usecnt > 1) 1734 prepare_schedule_to (aTHX_ ta, next);
699 { 1735 break;
700 prev->gencnt = ++prev->stack->gencnt;
701 prev->stack->usecnt = 1;
702 }
703
704 /* has our stack been invalidated? */
705 if (next->stack && next->stack->gencnt != next->gencnt)
706 {
707 deallocate_stack (next);
708 allocate_stack (next, 1);
709 coro_create (&(next->stack->cctx),
710 continue_coro, (void *)next,
711 next->stack->sptr, labs (next->stack->ssize));
712 }
713
714 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715 prev->cursp = stacklevel;
716 /* don't add any code here */
717 } 1736 }
718 else
719 next->cursp = stacklevel;
720 } 1737 }
721 else if (next->tmps_ix == -2)
722 croak ("tried to transfer to running coroutine");
723 else 1738 else
724 { 1739 {
725 LOCK; 1740 /* nothing to schedule: call the idle handler */
726 SAVE (prev, -1); /* first get rid of the old state */ 1741 if (SvROK (sv_idle)
727 UNLOCK; 1742 && SvOBJECT (SvRV (sv_idle)))
728
729 /* create the coroutine for the first time */
730 if (flags & TRANSFER_SAVE_CCTXT)
731 { 1743 {
732 if (!prev->stack) 1744 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
733 allocate_stack (prev, 0); 1745 api_ready (aTHX_ SvRV (sv_idle));
734 1746 --coro_nready;
735 /* the new coroutine starts with start_env again */
736 PL_top_env = &PL_start_env;
737
738 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
739 {
740 setup_coro (next);
741 next->cursp = stacklevel;
742
743 prev->stack->refcnt++;
744 prev->stack->usecnt++;
745 next->stack = prev->stack;
746 next->gencnt = prev->gencnt;
747 }
748 else
749 {
750 assert (!next->stack);
751 allocate_stack (next, 1);
752 coro_create (&(next->stack->cctx),
753 setup_coro, (void *)next,
754 next->stack->sptr, labs (next->stack->ssize));
755 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
756 prev->cursp = stacklevel;
757 /* don't add any code here */
758 }
759 } 1747 }
760 else 1748 else
761 { 1749 {
762 setup_coro (next); 1750 dSP;
763 next->cursp = stacklevel; 1751
1752 ENTER;
1753 SAVETMPS;
1754
1755 PUSHMARK (SP);
1756 PUTBACK;
1757 call_sv (sv_idle, G_VOID | G_DISCARD);
1758
1759 FREETMPS;
1760 LEAVE;
764 } 1761 }
765 } 1762 }
766 } 1763 }
1764}
767 1765
768 LOCK; 1766INLINE void
1767prepare_cede (pTHX_ struct coro_transfer_args *ta)
1768{
1769 api_ready (aTHX_ coro_current);
1770 prepare_schedule (aTHX_ ta);
1771}
1772
1773INLINE void
1774prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1775{
1776 SV *prev = SvRV (coro_current);
1777
769 if (coro_mortal) 1778 if (coro_nready)
770 {
771 SvREFCNT_dec (coro_mortal);
772 coro_mortal = 0;
773 } 1779 {
774 UNLOCK; 1780 prepare_schedule (aTHX_ ta);
1781 api_ready (aTHX_ prev);
1782 }
1783 else
1784 prepare_nop (aTHX_ ta);
775} 1785}
776 1786
777void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl; 1787static void
1788api_schedule (pTHX)
1789{
1790 struct coro_transfer_args ta;
778 1791
779#define SV_CORO(sv,func) \ 1792 prepare_schedule (aTHX_ &ta);
780 do { \ 1793 TRANSFER (ta, 1);
781 if (SvROK (sv)) \ 1794}
782 sv = SvRV (sv); \
783 \
784 if (SvTYPE (sv) == SVt_PVHV) \
785 { \
786 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
787 \
788 if (!he) \
789 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
790 \
791 (sv) = SvRV (HeVAL(he)); \
792 } \
793 \
794 /* must also be changed inside Coro::Cont::yield */ \
795 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
796 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
797 \
798 } while(0)
799 1795
800#define SvSTATE(sv) INT2PTR (struct coro *, SvIVX (sv)) 1796static void
1797api_schedule_to (pTHX_ SV *coro_sv)
1798{
1799 struct coro_transfer_args ta;
1800 struct coro *next = SvSTATE (coro_sv);
801 1801
1802 SvREFCNT_inc_NN (coro_sv);
1803 prepare_schedule_to (aTHX_ &ta, next);
1804}
1805
802static void 1806static int
1807api_cede (pTHX)
1808{
1809 struct coro_transfer_args ta;
1810
1811 prepare_cede (aTHX_ &ta);
1812
1813 if (expect_true (ta.prev != ta.next))
1814 {
1815 TRANSFER (ta, 1);
1816 return 1;
1817 }
1818 else
1819 return 0;
1820}
1821
1822static int
1823api_cede_notself (pTHX)
1824{
1825 if (coro_nready)
1826 {
1827 struct coro_transfer_args ta;
1828
1829 prepare_cede_notself (aTHX_ &ta);
1830 TRANSFER (ta, 1);
1831 return 1;
1832 }
1833 else
1834 return 0;
1835}
1836
1837static void
803api_transfer (pTHX_ SV *prev, SV *next, int flags) 1838api_trace (pTHX_ SV *coro_sv, int flags)
804{ 1839{
805 SV_CORO (prev, "Coro::transfer"); 1840 struct coro *coro = SvSTATE (coro_sv);
806 SV_CORO (next, "Coro::transfer");
807 1841
808 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1842 if (coro->flags & CF_RUNNING)
809} 1843 croak ("cannot enable tracing on a running coroutine, caught");
810 1844
1845 if (flags & CC_TRACE)
1846 {
1847 if (!coro->cctx)
1848 coro->cctx = cctx_new_run ();
1849 else if (!(coro->cctx->flags & CC_TRACE))
1850 croak ("cannot enable tracing on coroutine with custom stack, caught");
1851
1852 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1853 }
1854 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1855 {
1856 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1857
1858 if (coro->flags & CF_RUNNING)
1859 PL_runops = RUNOPS_DEFAULT;
1860 else
1861 coro->slot->runops = RUNOPS_DEFAULT;
1862 }
1863}
1864
1865static void
1866coro_call_on_destroy (pTHX_ struct coro *coro)
1867{
1868 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1869 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1870
1871 if (on_destroyp)
1872 {
1873 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1874
1875 while (AvFILLp (on_destroy) >= 0)
1876 {
1877 dSP; /* don't disturb outer sp */
1878 SV *cb = av_pop (on_destroy);
1879
1880 PUSHMARK (SP);
1881
1882 if (statusp)
1883 {
1884 int i;
1885 AV *status = (AV *)SvRV (*statusp);
1886 EXTEND (SP, AvFILLp (status) + 1);
1887
1888 for (i = 0; i <= AvFILLp (status); ++i)
1889 PUSHs (AvARRAY (status)[i]);
1890 }
1891
1892 PUTBACK;
1893 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1894 }
1895 }
1896}
1897
1898static void
1899slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1900{
1901 int i;
1902 HV *hv = (HV *)SvRV (coro_current);
1903 AV *av = newAV ();
1904
1905 av_extend (av, items - 1);
1906 for (i = 0; i < items; ++i)
1907 av_push (av, SvREFCNT_inc_NN (arg [i]));
1908
1909 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1910
1911 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1912 api_ready (aTHX_ sv_manager);
1913
1914 frame->prepare = prepare_schedule;
1915 frame->check = slf_check_repeat;
1916
1917 /* as a minor optimisation, we could unwind all stacks here */
1918 /* but that puts extra pressure on pp_slf, and is not worth much */
1919 /*coro_unwind_stacks (aTHX);*/
1920}
1921
811/** Coro ********************************************************************/ 1922/*****************************************************************************/
1923/* async pool handler */
812 1924
813#define PRIO_MAX 3
814#define PRIO_HIGH 1
815#define PRIO_NORMAL 0
816#define PRIO_LOW -1
817#define PRIO_IDLE -3
818#define PRIO_MIN -4
819
820/* for Coro.pm */
821static GV *coro_current, *coro_idle;
822static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
823static int coro_nready;
824
825static void 1925static int
826coro_enq (pTHX_ SV *sv) 1926slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
827{ 1927{
828 SV **xprio; 1928 HV *hv = (HV *)SvRV (coro_current);
829 int prio; 1929 struct coro *coro = (struct coro *)frame->data;
830 1930
1931 if (!coro->invoke_cb)
1932 return 1; /* loop till we have invoke */
1933 else
1934 {
1935 hv_store (hv, "desc", sizeof ("desc") - 1,
1936 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1937
1938 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1939
1940 {
1941 dSP;
1942 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1943 PUTBACK;
1944 }
1945
1946 SvREFCNT_dec (GvAV (PL_defgv));
1947 GvAV (PL_defgv) = coro->invoke_av;
1948 coro->invoke_av = 0;
1949
1950 return 0;
1951 }
1952}
1953
1954static void
1955slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1956{
1957 HV *hv = (HV *)SvRV (coro_current);
1958 struct coro *coro = SvSTATE_hv ((SV *)hv);
1959
1960 if (expect_true (coro->saved_deffh))
1961 {
1962 /* subsequent iteration */
1963 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1964 coro->saved_deffh = 0;
1965
1966 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1967 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1968 {
1969 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1970 coro->invoke_av = newAV ();
1971
1972 frame->prepare = prepare_nop;
1973 }
1974 else
1975 {
1976 av_clear (GvAV (PL_defgv));
1977 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1978
1979 coro->prio = 0;
1980
1981 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1982 api_trace (aTHX_ coro_current, 0);
1983
1984 frame->prepare = prepare_schedule;
1985 av_push (av_async_pool, SvREFCNT_inc (hv));
1986 }
1987 }
1988 else
1989 {
1990 /* first iteration, simply fall through */
1991 frame->prepare = prepare_nop;
1992 }
1993
1994 frame->check = slf_check_pool_handler;
1995 frame->data = (void *)coro;
1996}
1997
1998/*****************************************************************************/
1999/* rouse callback */
2000
2001#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2002
2003static void
2004coro_rouse_callback (pTHX_ CV *cv)
2005{
2006 dXSARGS;
2007 SV *data = (SV *)S_GENSUB_ARG;
2008
831 if (SvTYPE (sv) != SVt_PVHV) 2009 if (SvTYPE (SvRV (data)) != SVt_PVAV)
832 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2010 {
2011 /* first call, set args */
2012 SV *coro = SvRV (data);
2013 AV *av = newAV ();
833 2014
834 xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 2015 SvRV_set (data, (SV *)av);
835 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
836 2016
837 prio = prio > PRIO_MAX ? PRIO_MAX 2017 /* better take a full copy of the arguments */
838 : prio < PRIO_MIN ? PRIO_MIN 2018 while (items--)
839 : prio; 2019 av_store (av, items, newSVsv (ST (items)));
840 2020
841 av_push (coro_ready [prio - PRIO_MIN], sv); 2021 api_ready (aTHX_ coro);
842 coro_nready++; 2022 SvREFCNT_dec (coro);
2023 }
2024
2025 XSRETURN_EMPTY;
2026}
2027
2028static int
2029slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2030{
2031 SV *data = (SV *)frame->data;
2032
2033 if (CORO_THROW)
2034 return 0;
2035
2036 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2037 return 1;
2038
2039 /* now push all results on the stack */
2040 {
2041 dSP;
2042 AV *av = (AV *)SvRV (data);
2043 int i;
2044
2045 EXTEND (SP, AvFILLp (av) + 1);
2046 for (i = 0; i <= AvFILLp (av); ++i)
2047 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2048
2049 /* we have stolen the elements, so set length to zero and free */
2050 AvFILLp (av) = -1;
2051 av_undef (av);
2052
2053 PUTBACK;
2054 }
2055
2056 return 0;
2057}
2058
2059static void
2060slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2061{
2062 SV *cb;
2063
2064 if (items)
2065 cb = arg [0];
2066 else
2067 {
2068 struct coro *coro = SvSTATE_current;
2069
2070 if (!coro->rouse_cb)
2071 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2072
2073 cb = sv_2mortal (coro->rouse_cb);
2074 coro->rouse_cb = 0;
2075 }
2076
2077 if (!SvROK (cb)
2078 || SvTYPE (SvRV (cb)) != SVt_PVCV
2079 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2080 croak ("Coro::rouse_wait called with illegal callback argument,");
2081
2082 {
2083 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2084 SV *data = (SV *)S_GENSUB_ARG;
2085
2086 frame->data = (void *)data;
2087 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2088 frame->check = slf_check_rouse_wait;
2089 }
843} 2090}
844 2091
845static SV * 2092static SV *
846coro_deq (pTHX_ int min_prio) 2093coro_new_rouse_cb (pTHX)
847{ 2094{
848 int prio = PRIO_MAX - PRIO_MIN; 2095 HV *hv = (HV *)SvRV (coro_current);
2096 struct coro *coro = SvSTATE_hv (hv);
2097 SV *data = newRV_inc ((SV *)hv);
2098 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
849 2099
850 min_prio -= PRIO_MIN; 2100 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
851 if (min_prio < 0) 2101 SvREFCNT_dec (data); /* magicext increases the refcount */
852 min_prio = 0;
853 2102
854 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2103 SvREFCNT_dec (coro->rouse_cb);
855 if (AvFILLp (coro_ready [prio]) >= 0) 2104 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2105
2106 return cb;
2107}
2108
2109/*****************************************************************************/
2110/* schedule-like-function opcode (SLF) */
2111
2112static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2113static const CV *slf_cv;
2114static SV **slf_argv;
2115static int slf_argc, slf_arga; /* count, allocated */
2116static I32 slf_ax; /* top of stack, for restore */
2117
2118/* this restores the stack in the case we patched the entersub, to */
2119/* recreate the stack frame as perl will on following calls */
2120/* since entersub cleared the stack */
2121static OP *
2122pp_restore (pTHX)
2123{
2124 int i;
2125 SV **SP = PL_stack_base + slf_ax;
2126
2127 PUSHMARK (SP);
2128
2129 EXTEND (SP, slf_argc + 1);
2130
2131 for (i = 0; i < slf_argc; ++i)
2132 PUSHs (sv_2mortal (slf_argv [i]));
2133
2134 PUSHs ((SV *)CvGV (slf_cv));
2135
2136 RETURNOP (slf_restore.op_first);
2137}
2138
2139static void
2140slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2141{
2142 SV **arg = (SV **)slf_frame.data;
2143
2144 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2145}
2146
2147static void
2148slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2149{
2150 if (items != 2)
2151 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2152
2153 frame->prepare = slf_prepare_transfer;
2154 frame->check = slf_check_nop;
2155 frame->data = (void *)arg; /* let's hope it will stay valid */
2156}
2157
2158static void
2159slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2160{
2161 frame->prepare = prepare_schedule;
2162 frame->check = slf_check_nop;
2163}
2164
2165static void
2166slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2167{
2168 struct coro *next = (struct coro *)slf_frame.data;
2169
2170 SvREFCNT_inc_NN (next->hv);
2171 prepare_schedule_to (aTHX_ ta, next);
2172}
2173
2174static void
2175slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2176{
2177 if (!items)
2178 croak ("Coro::schedule_to expects a coroutine argument, caught");
2179
2180 frame->data = (void *)SvSTATE (arg [0]);
2181 frame->prepare = slf_prepare_schedule_to;
2182 frame->check = slf_check_nop;
2183}
2184
2185static void
2186slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2187{
2188 api_ready (aTHX_ SvRV (coro_current));
2189
2190 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2191}
2192
2193static void
2194slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2195{
2196 frame->prepare = prepare_cede;
2197 frame->check = slf_check_nop;
2198}
2199
2200static void
2201slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2202{
2203 frame->prepare = prepare_cede_notself;
2204 frame->check = slf_check_nop;
2205}
2206
2207/*
2208 * these not obviously related functions are all rolled into one
2209 * function to increase chances that they all will call transfer with the same
2210 * stack offset
2211 * SLF stands for "schedule-like-function".
2212 */
2213static OP *
2214pp_slf (pTHX)
2215{
2216 I32 checkmark; /* mark SP to see how many elements check has pushed */
2217
2218 /* set up the slf frame, unless it has already been set-up */
2219 /* the latter happens when a new coro has been started */
2220 /* or when a new cctx was attached to an existing coroutine */
2221 if (expect_true (!slf_frame.prepare))
2222 {
2223 /* first iteration */
2224 dSP;
2225 SV **arg = PL_stack_base + TOPMARK + 1;
2226 int items = SP - arg; /* args without function object */
2227 SV *gv = *sp;
2228
2229 /* do a quick consistency check on the "function" object, and if it isn't */
2230 /* for us, divert to the real entersub */
2231 if (SvTYPE (gv) != SVt_PVGV
2232 || !GvCV (gv)
2233 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2234 return PL_ppaddr[OP_ENTERSUB](aTHX);
2235
2236 if (!(PL_op->op_flags & OPf_STACKED))
856 { 2237 {
857 coro_nready--; 2238 /* ampersand-form of call, use @_ instead of stack */
858 return av_shift (coro_ready [prio]); 2239 AV *av = GvAV (PL_defgv);
2240 arg = AvARRAY (av);
2241 items = AvFILLp (av) + 1;
859 } 2242 }
2243
2244 /* now call the init function, which needs to set up slf_frame */
2245 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2246 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2247
2248 /* pop args */
2249 SP = PL_stack_base + POPMARK;
2250
2251 PUTBACK;
2252 }
2253
2254 /* now that we have a slf_frame, interpret it! */
2255 /* we use a callback system not to make the code needlessly */
2256 /* complicated, but so we can run multiple perl coros from one cctx */
2257
2258 do
2259 {
2260 struct coro_transfer_args ta;
2261
2262 slf_frame.prepare (aTHX_ &ta);
2263 TRANSFER (ta, 0);
2264
2265 checkmark = PL_stack_sp - PL_stack_base;
2266 }
2267 while (slf_frame.check (aTHX_ &slf_frame));
2268
2269 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2270
2271 /* exception handling */
2272 if (expect_false (CORO_THROW))
2273 {
2274 SV *exception = sv_2mortal (CORO_THROW);
2275
2276 CORO_THROW = 0;
2277 sv_setsv (ERRSV, exception);
2278 croak (0);
2279 }
2280
2281 /* return value handling - mostly like entersub */
2282 /* make sure we put something on the stack in scalar context */
2283 if (GIMME_V == G_SCALAR)
2284 {
2285 dSP;
2286 SV **bot = PL_stack_base + checkmark;
2287
2288 if (sp == bot) /* too few, push undef */
2289 bot [1] = &PL_sv_undef;
2290 else if (sp != bot + 1) /* too many, take last one */
2291 bot [1] = *sp;
2292
2293 SP = bot + 1;
2294
2295 PUTBACK;
2296 }
2297
2298 return NORMAL;
2299}
2300
2301static void
2302api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2303{
2304 int i;
2305 SV **arg = PL_stack_base + ax;
2306 int items = PL_stack_sp - arg + 1;
2307
2308 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2309
2310 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2311 && PL_op->op_ppaddr != pp_slf)
2312 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2313
2314 CvFLAGS (cv) |= CVf_SLF;
2315 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2316 slf_cv = cv;
2317
2318 /* we patch the op, and then re-run the whole call */
2319 /* we have to put the same argument on the stack for this to work */
2320 /* and this will be done by pp_restore */
2321 slf_restore.op_next = (OP *)&slf_restore;
2322 slf_restore.op_type = OP_CUSTOM;
2323 slf_restore.op_ppaddr = pp_restore;
2324 slf_restore.op_first = PL_op;
2325
2326 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2327
2328 if (PL_op->op_flags & OPf_STACKED)
2329 {
2330 if (items > slf_arga)
2331 {
2332 slf_arga = items;
2333 free (slf_argv);
2334 slf_argv = malloc (slf_arga * sizeof (SV *));
2335 }
2336
2337 slf_argc = items;
2338
2339 for (i = 0; i < items; ++i)
2340 slf_argv [i] = SvREFCNT_inc (arg [i]);
2341 }
2342 else
2343 slf_argc = 0;
2344
2345 PL_op->op_ppaddr = pp_slf;
2346 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2347
2348 PL_op = (OP *)&slf_restore;
2349}
2350
2351/*****************************************************************************/
2352/* dynamic wind */
2353
2354static void
2355on_enterleave_call (pTHX_ SV *cb)
2356{
2357 dSP;
2358
2359 PUSHSTACK;
2360
2361 PUSHMARK (SP);
2362 PUTBACK;
2363 call_sv (cb, G_VOID | G_DISCARD);
2364 SPAGAIN;
2365
2366 POPSTACK;
2367}
2368
2369static SV *
2370coro_avp_pop_and_free (pTHX_ AV **avp)
2371{
2372 AV *av = *avp;
2373 SV *res = av_pop (av);
2374
2375 if (AvFILLp (av) < 0)
2376 {
2377 *avp = 0;
2378 SvREFCNT_dec (av);
2379 }
2380
2381 return res;
2382}
2383
2384static void
2385coro_pop_on_enter (pTHX_ void *coro)
2386{
2387 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2388 SvREFCNT_dec (cb);
2389}
2390
2391static void
2392coro_pop_on_leave (pTHX_ void *coro)
2393{
2394 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2395 on_enterleave_call (aTHX_ sv_2mortal (cb));
2396}
2397
2398/*****************************************************************************/
2399/* PerlIO::cede */
2400
2401typedef struct
2402{
2403 PerlIOBuf base;
2404 NV next, every;
2405} PerlIOCede;
2406
2407static IV
2408PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2409{
2410 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2411
2412 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2413 self->next = nvtime () + self->every;
2414
2415 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2416}
2417
2418static SV *
2419PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2420{
2421 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2422
2423 return newSVnv (self->every);
2424}
2425
2426static IV
2427PerlIOCede_flush (pTHX_ PerlIO *f)
2428{
2429 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2430 double now = nvtime ();
2431
2432 if (now >= self->next)
2433 {
2434 api_cede (aTHX);
2435 self->next = now + self->every;
2436 }
2437
2438 return PerlIOBuf_flush (aTHX_ f);
2439}
2440
2441static PerlIO_funcs PerlIO_cede =
2442{
2443 sizeof(PerlIO_funcs),
2444 "cede",
2445 sizeof(PerlIOCede),
2446 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2447 PerlIOCede_pushed,
2448 PerlIOBuf_popped,
2449 PerlIOBuf_open,
2450 PerlIOBase_binmode,
2451 PerlIOCede_getarg,
2452 PerlIOBase_fileno,
2453 PerlIOBuf_dup,
2454 PerlIOBuf_read,
2455 PerlIOBuf_unread,
2456 PerlIOBuf_write,
2457 PerlIOBuf_seek,
2458 PerlIOBuf_tell,
2459 PerlIOBuf_close,
2460 PerlIOCede_flush,
2461 PerlIOBuf_fill,
2462 PerlIOBase_eof,
2463 PerlIOBase_error,
2464 PerlIOBase_clearerr,
2465 PerlIOBase_setlinebuf,
2466 PerlIOBuf_get_base,
2467 PerlIOBuf_bufsiz,
2468 PerlIOBuf_get_ptr,
2469 PerlIOBuf_get_cnt,
2470 PerlIOBuf_set_ptrcnt,
2471};
2472
2473/*****************************************************************************/
2474/* Coro::Semaphore & Coro::Signal */
2475
2476static SV *
2477coro_waitarray_new (pTHX_ int count)
2478{
2479 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2480 AV *av = newAV ();
2481 SV **ary;
2482
2483 /* unfortunately, building manually saves memory */
2484 Newx (ary, 2, SV *);
2485 AvALLOC (av) = ary;
2486#if PERL_VERSION_ATLEAST (5,10,0)
2487 AvARRAY (av) = ary;
2488#else
2489 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2490 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2491 SvPVX ((SV *)av) = (char *)ary;
2492#endif
2493 AvMAX (av) = 1;
2494 AvFILLp (av) = 0;
2495 ary [0] = newSViv (count);
2496
2497 return newRV_noinc ((SV *)av);
2498}
2499
2500/* semaphore */
2501
2502static void
2503coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2504{
2505 SV *count_sv = AvARRAY (av)[0];
2506 IV count = SvIVX (count_sv);
2507
2508 count += adjust;
2509 SvIVX (count_sv) = count;
2510
2511 /* now wake up as many waiters as are expected to lock */
2512 while (count > 0 && AvFILLp (av) > 0)
2513 {
2514 SV *cb;
2515
2516 /* swap first two elements so we can shift a waiter */
2517 AvARRAY (av)[0] = AvARRAY (av)[1];
2518 AvARRAY (av)[1] = count_sv;
2519 cb = av_shift (av);
2520
2521 if (SvOBJECT (cb))
2522 {
2523 api_ready (aTHX_ cb);
2524 --count;
2525 }
2526 else if (SvTYPE (cb) == SVt_PVCV)
2527 {
2528 dSP;
2529 PUSHMARK (SP);
2530 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2531 PUTBACK;
2532 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2533 }
2534
2535 SvREFCNT_dec (cb);
2536 }
2537}
2538
2539static void
2540coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2541{
2542 /* call $sem->adjust (0) to possibly wake up some other waiters */
2543 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2544}
2545
2546static int
2547slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2548{
2549 AV *av = (AV *)frame->data;
2550 SV *count_sv = AvARRAY (av)[0];
2551
2552 /* if we are about to throw, don't actually acquire the lock, just throw */
2553 if (CORO_THROW)
2554 return 0;
2555 else if (SvIVX (count_sv) > 0)
2556 {
2557 SvSTATE_current->on_destroy = 0;
2558
2559 if (acquire)
2560 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2561 else
2562 coro_semaphore_adjust (aTHX_ av, 0);
2563
2564 return 0;
2565 }
2566 else
2567 {
2568 int i;
2569 /* if we were woken up but can't down, we look through the whole */
2570 /* waiters list and only add us if we aren't in there already */
2571 /* this avoids some degenerate memory usage cases */
2572
2573 for (i = 1; i <= AvFILLp (av); ++i)
2574 if (AvARRAY (av)[i] == SvRV (coro_current))
2575 return 1;
2576
2577 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2578 return 1;
2579 }
2580}
2581
2582static int
2583slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2584{
2585 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2586}
2587
2588static int
2589slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2590{
2591 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2592}
2593
2594static void
2595slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2596{
2597 AV *av = (AV *)SvRV (arg [0]);
2598
2599 if (SvIVX (AvARRAY (av)[0]) > 0)
2600 {
2601 frame->data = (void *)av;
2602 frame->prepare = prepare_nop;
2603 }
2604 else
2605 {
2606 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2607
2608 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2609 frame->prepare = prepare_schedule;
2610
2611 /* to avoid race conditions when a woken-up coro gets terminated */
2612 /* we arrange for a temporary on_destroy that calls adjust (0) */
2613 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2614 }
2615}
2616
2617static void
2618slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2619{
2620 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2621 frame->check = slf_check_semaphore_down;
2622}
2623
2624static void
2625slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2626{
2627 if (items >= 2)
2628 {
2629 /* callback form */
2630 AV *av = (AV *)SvRV (arg [0]);
2631 SV *cb_cv = s_get_cv_croak (arg [1]);
2632
2633 av_push (av, SvREFCNT_inc_NN (cb_cv));
2634
2635 if (SvIVX (AvARRAY (av)[0]) > 0)
2636 coro_semaphore_adjust (aTHX_ av, 0);
2637
2638 frame->prepare = prepare_nop;
2639 frame->check = slf_check_nop;
2640 }
2641 else
2642 {
2643 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2644 frame->check = slf_check_semaphore_wait;
2645 }
2646}
2647
2648/* signal */
2649
2650static void
2651coro_signal_wake (pTHX_ AV *av, int count)
2652{
2653 SvIVX (AvARRAY (av)[0]) = 0;
2654
2655 /* now signal count waiters */
2656 while (count > 0 && AvFILLp (av) > 0)
2657 {
2658 SV *cb;
2659
2660 /* swap first two elements so we can shift a waiter */
2661 cb = AvARRAY (av)[0];
2662 AvARRAY (av)[0] = AvARRAY (av)[1];
2663 AvARRAY (av)[1] = cb;
2664
2665 cb = av_shift (av);
2666
2667 if (SvTYPE (cb) == SVt_PVCV)
2668 {
2669 dSP;
2670 PUSHMARK (SP);
2671 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2672 PUTBACK;
2673 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2674 }
2675 else
2676 {
2677 api_ready (aTHX_ cb);
2678 sv_setiv (cb, 0); /* signal waiter */
2679 }
2680
2681 SvREFCNT_dec (cb);
2682
2683 --count;
2684 }
2685}
2686
2687static int
2688slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2689{
2690 /* if we are about to throw, also stop waiting */
2691 return SvROK ((SV *)frame->data) && !CORO_THROW;
2692}
2693
2694static void
2695slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2696{
2697 AV *av = (AV *)SvRV (arg [0]);
2698
2699 if (items >= 2)
2700 {
2701 SV *cb_cv = s_get_cv_croak (arg [1]);
2702 av_push (av, SvREFCNT_inc_NN (cb_cv));
2703
2704 if (SvIVX (AvARRAY (av)[0]))
2705 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2706
2707 frame->prepare = prepare_nop;
2708 frame->check = slf_check_nop;
2709 }
2710 else if (SvIVX (AvARRAY (av)[0]))
2711 {
2712 SvIVX (AvARRAY (av)[0]) = 0;
2713 frame->prepare = prepare_nop;
2714 frame->check = slf_check_nop;
2715 }
2716 else
2717 {
2718 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2719
2720 av_push (av, waiter);
2721
2722 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2723 frame->prepare = prepare_schedule;
2724 frame->check = slf_check_signal_wait;
2725 }
2726}
2727
2728/*****************************************************************************/
2729/* Coro::AIO */
2730
2731#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2732
2733/* helper storage struct */
2734struct io_state
2735{
2736 int errorno;
2737 I32 laststype; /* U16 in 5.10.0 */
2738 int laststatval;
2739 Stat_t statcache;
2740};
2741
2742static void
2743coro_aio_callback (pTHX_ CV *cv)
2744{
2745 dXSARGS;
2746 AV *state = (AV *)S_GENSUB_ARG;
2747 SV *coro = av_pop (state);
2748 SV *data_sv = newSV (sizeof (struct io_state));
2749
2750 av_extend (state, items - 1);
2751
2752 sv_upgrade (data_sv, SVt_PV);
2753 SvCUR_set (data_sv, sizeof (struct io_state));
2754 SvPOK_only (data_sv);
2755
2756 {
2757 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2758
2759 data->errorno = errno;
2760 data->laststype = PL_laststype;
2761 data->laststatval = PL_laststatval;
2762 data->statcache = PL_statcache;
2763 }
2764
2765 /* now build the result vector out of all the parameters and the data_sv */
2766 {
2767 int i;
2768
2769 for (i = 0; i < items; ++i)
2770 av_push (state, SvREFCNT_inc_NN (ST (i)));
2771 }
2772
2773 av_push (state, data_sv);
2774
2775 api_ready (aTHX_ coro);
2776 SvREFCNT_dec (coro);
2777 SvREFCNT_dec ((AV *)state);
2778}
2779
2780static int
2781slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2782{
2783 AV *state = (AV *)frame->data;
2784
2785 /* if we are about to throw, return early */
2786 /* this does not cancel the aio request, but at least */
2787 /* it quickly returns */
2788 if (CORO_THROW)
2789 return 0;
2790
2791 /* one element that is an RV? repeat! */
2792 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2793 return 1;
2794
2795 /* restore status */
2796 {
2797 SV *data_sv = av_pop (state);
2798 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2799
2800 errno = data->errorno;
2801 PL_laststype = data->laststype;
2802 PL_laststatval = data->laststatval;
2803 PL_statcache = data->statcache;
2804
2805 SvREFCNT_dec (data_sv);
2806 }
2807
2808 /* push result values */
2809 {
2810 dSP;
2811 int i;
2812
2813 EXTEND (SP, AvFILLp (state) + 1);
2814 for (i = 0; i <= AvFILLp (state); ++i)
2815 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2816
2817 PUTBACK;
2818 }
860 2819
861 return 0; 2820 return 0;
862} 2821}
863 2822
864static void 2823static void
865api_ready (SV *coro) 2824slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
866{ 2825{
867 dTHX; 2826 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
868
869 if (SvROK (coro))
870 coro = SvRV (coro);
871
872 LOCK;
873 coro_enq (aTHX_ SvREFCNT_inc (coro));
874 UNLOCK;
875}
876
877static void
878api_schedule (void)
879{
880 dTHX;
881
882 SV *prev, *next;
883
884 LOCK;
885
886 prev = SvRV (GvSV (coro_current)); 2827 SV *coro_hv = SvRV (coro_current);
887 next = coro_deq (aTHX_ PRIO_MIN); 2828 struct coro *coro = SvSTATE_hv (coro_hv);
888 2829
889 if (!next) 2830 /* put our coroutine id on the state arg */
890 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 2831 av_push (state, SvREFCNT_inc_NN (coro_hv));
891 2832
892 /* free this only after the transfer */ 2833 /* first see whether we have a non-zero priority and set it as AIO prio */
893 coro_mortal = prev; 2834 if (coro->prio)
894 SV_CORO (prev, "Coro::schedule"); 2835 {
2836 dSP;
895 2837
896 SvRV (GvSV (coro_current)) = next; 2838 static SV *prio_cv;
2839 static SV *prio_sv;
897 2840
898 SV_CORO (next, "Coro::schedule"); 2841 if (expect_false (!prio_cv))
2842 {
2843 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2844 prio_sv = newSViv (0);
2845 }
899 2846
900 UNLOCK; 2847 PUSHMARK (SP);
2848 sv_setiv (prio_sv, coro->prio);
2849 XPUSHs (prio_sv);
901 2850
902 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 2851 PUTBACK;
903 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2852 call_sv (prio_cv, G_VOID | G_DISCARD);
904} 2853 }
905 2854
906static void 2855 /* now call the original request */
907api_cede (void) 2856 {
908{ 2857 dSP;
909 dTHX; 2858 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2859 int i;
910 2860
911 LOCK; 2861 PUSHMARK (SP);
912 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
913 UNLOCK;
914 2862
915 api_schedule (); 2863 /* first push all args to the stack */
916} 2864 EXTEND (SP, items + 1);
917 2865
2866 for (i = 0; i < items; ++i)
2867 PUSHs (arg [i]);
2868
2869 /* now push the callback closure */
2870 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2871
2872 /* now call the AIO function - we assume our request is uncancelable */
2873 PUTBACK;
2874 call_sv ((SV *)req, G_VOID | G_DISCARD);
2875 }
2876
2877 /* now that the requets is going, we loop toll we have a result */
2878 frame->data = (void *)state;
2879 frame->prepare = prepare_schedule;
2880 frame->check = slf_check_aio_req;
2881}
2882
2883static void
2884coro_aio_req_xs (pTHX_ CV *cv)
2885{
2886 dXSARGS;
2887
2888 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2889
2890 XSRETURN_EMPTY;
2891}
2892
2893/*****************************************************************************/
2894
2895#if CORO_CLONE
2896# include "clone.c"
2897#endif
2898
918MODULE = Coro::State PACKAGE = Coro::State 2899MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
919 2900
920PROTOTYPES: ENABLE 2901PROTOTYPES: DISABLE
921 2902
922BOOT: 2903BOOT:
923{ /* {} necessary for stoopid perl-5.6.x */ 2904{
924#ifdef USE_ITHREADS 2905#ifdef USE_ITHREADS
925 MUTEX_INIT (&coro_mutex); 2906# if CORO_PTHREAD
2907 coro_thx = PERL_GET_CONTEXT;
2908# endif
926#endif 2909#endif
927 BOOT_PAGESIZE; 2910 BOOT_PAGESIZE;
928 2911
929 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2912 cctx_current = cctx_new_empty ();
930 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2913
2914 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2915 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2916
2917 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2918 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2919 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2920
2921 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2922 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2923 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2924
931 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2925 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
932 2926
933 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2927 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
934 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2928 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
935 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2929 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
936 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2930 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
937 2931
938 main_mainstack = PL_mainstack; 2932 main_mainstack = PL_mainstack;
2933 main_top_env = PL_top_env;
939 2934
2935 while (main_top_env->je_prev)
2936 main_top_env = main_top_env->je_prev;
2937
2938 {
2939 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2940
2941 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2942 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2943
2944 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2945 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2946 }
2947
940 coroapi.ver = CORO_API_VERSION; 2948 coroapi.ver = CORO_API_VERSION;
2949 coroapi.rev = CORO_API_REVISION;
2950
941 coroapi.transfer = api_transfer; 2951 coroapi.transfer = api_transfer;
942}
943 2952
944Coro::State 2953 coroapi.sv_state = SvSTATE_;
945_newprocess(args) 2954 coroapi.execute_slf = api_execute_slf;
946 SV * args 2955 coroapi.prepare_nop = prepare_nop;
947 PROTOTYPE: $ 2956 coroapi.prepare_schedule = prepare_schedule;
2957 coroapi.prepare_cede = prepare_cede;
2958 coroapi.prepare_cede_notself = prepare_cede_notself;
2959
2960 {
2961 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2962
2963 if (!svp) croak ("Time::HiRes is required");
2964 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2965
2966 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2967
2968 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
2969 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
2970 }
2971
2972 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
2973}
2974
2975SV *
2976new (char *klass, ...)
2977 ALIAS:
2978 Coro::new = 1
948 CODE: 2979 CODE:
949 Coro__State coro; 2980{
2981 struct coro *coro;
2982 MAGIC *mg;
2983 HV *hv;
2984 SV *cb;
2985 int i;
950 2986
951 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2987 if (items > 1)
952 croak ("Coro::State::_newprocess expects an arrayref");
953 2988 {
2989 cb = s_get_cv_croak (ST (1));
2990
2991 if (!ix)
2992 {
2993 if (CvISXSUB (cb))
2994 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2995
2996 if (!CvROOT (cb))
2997 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2998 }
2999 }
3000
954 Newz (0, coro, 1, struct coro); 3001 Newz (0, coro, 1, struct coro);
3002 coro->args = newAV ();
3003 coro->flags = CF_NEW;
955 3004
956 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 3005 if (coro_first) coro_first->prev = coro;
957 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 3006 coro->next = coro_first;
958 /*coro->stack = 0;*/ 3007 coro_first = coro;
959 3008
960 RETVAL = coro; 3009 coro->hv = hv = newHV ();
3010 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3011 mg->mg_flags |= MGf_DUP;
3012 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
3013
3014 if (items > 1)
3015 {
3016 av_extend (coro->args, items - 1 + ix - 1);
3017
3018 if (ix)
3019 {
3020 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3021 cb = (SV *)cv_coro_run;
3022 }
3023
3024 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3025
3026 for (i = 2; i < items; i++)
3027 av_push (coro->args, newSVsv (ST (i)));
3028 }
3029}
961 OUTPUT: 3030 OUTPUT:
962 RETVAL 3031 RETVAL
963 3032
964void 3033void
965transfer(prev, next, flags) 3034transfer (...)
966 SV *prev
967 SV *next
968 int flags
969 PROTOTYPE: @ 3035 PROTOTYPE: $$
970 CODE: 3036 CODE:
971 PUTBACK; 3037 CORO_EXECUTE_SLF_XS (slf_init_transfer);
972 SV_CORO (next, "Coro::transfer"); 3038
973 SV_CORO (prev, "Coro::transfer"); 3039bool
974 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3040_destroy (SV *coro_sv)
975 SPAGAIN; 3041 CODE:
3042 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3043 OUTPUT:
3044 RETVAL
976 3045
977void 3046void
978DESTROY(coro)
979 Coro::State coro
980 CODE:
981
982 if (coro->mainstack && coro->mainstack != main_mainstack)
983 {
984 struct coro temp;
985
986 PUTBACK;
987 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
988 LOAD (aTHX_ coro);
989 SPAGAIN;
990
991 destroy_stacks (aTHX);
992
993 LOAD ((&temp)); /* this will get rid of defsv etc.. */
994 SPAGAIN;
995
996 coro->mainstack = 0;
997 }
998
999 deallocate_stack (coro);
1000 SvREFCNT_dec (coro->args);
1001 Safefree (coro);
1002
1003void
1004_exit(code) 3047_exit (int code)
1005 int code
1006 PROTOTYPE: $ 3048 PROTOTYPE: $
1007 CODE: 3049 CODE:
1008 _exit (code); 3050 _exit (code);
1009 3051
1010MODULE = Coro::State PACKAGE = Coro::Cont 3052SV *
3053clone (Coro::State coro)
3054 CODE:
3055{
3056#if CORO_CLONE
3057 struct coro *ncoro = coro_clone (aTHX_ coro);
3058 MAGIC *mg;
3059 /* TODO: too much duplication */
3060 ncoro->hv = newHV ();
3061 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3062 mg->mg_flags |= MGf_DUP;
3063 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3064#else
3065 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3066#endif
3067}
3068 OUTPUT:
3069 RETVAL
3070
3071int
3072cctx_stacksize (int new_stacksize = 0)
3073 PROTOTYPE: ;$
3074 CODE:
3075 RETVAL = cctx_stacksize;
3076 if (new_stacksize)
3077 {
3078 cctx_stacksize = new_stacksize;
3079 ++cctx_gen;
3080 }
3081 OUTPUT:
3082 RETVAL
3083
3084int
3085cctx_max_idle (int max_idle = 0)
3086 PROTOTYPE: ;$
3087 CODE:
3088 RETVAL = cctx_max_idle;
3089 if (max_idle > 1)
3090 cctx_max_idle = max_idle;
3091 OUTPUT:
3092 RETVAL
3093
3094int
3095cctx_count ()
3096 PROTOTYPE:
3097 CODE:
3098 RETVAL = cctx_count;
3099 OUTPUT:
3100 RETVAL
3101
3102int
3103cctx_idle ()
3104 PROTOTYPE:
3105 CODE:
3106 RETVAL = cctx_idle;
3107 OUTPUT:
3108 RETVAL
1011 3109
1012void 3110void
1013yield(...) 3111list ()
1014 PROTOTYPE: @ 3112 PROTOTYPE:
3113 PPCODE:
3114{
3115 struct coro *coro;
3116 for (coro = coro_first; coro; coro = coro->next)
3117 if (coro->hv)
3118 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3119}
3120
3121void
3122call (Coro::State coro, SV *coderef)
3123 ALIAS:
3124 eval = 1
3125 CODE:
3126{
3127 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3128 {
3129 struct coro *current = SvSTATE_current;
3130
3131 if (current != coro)
3132 {
3133 PUTBACK;
3134 save_perl (aTHX_ current);
3135 load_perl (aTHX_ coro);
3136 SPAGAIN;
3137 }
3138
3139 PUSHSTACK;
3140
3141 PUSHMARK (SP);
3142 PUTBACK;
3143
3144 if (ix)
3145 eval_sv (coderef, 0);
3146 else
3147 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3148
3149 POPSTACK;
3150 SPAGAIN;
3151
3152 if (current != coro)
3153 {
3154 PUTBACK;
3155 save_perl (aTHX_ coro);
3156 load_perl (aTHX_ current);
3157 SPAGAIN;
3158 }
3159 }
3160}
3161
3162SV *
3163is_ready (Coro::State coro)
3164 PROTOTYPE: $
3165 ALIAS:
3166 is_ready = CF_READY
3167 is_running = CF_RUNNING
3168 is_new = CF_NEW
3169 is_destroyed = CF_DESTROYED
3170 is_suspended = CF_SUSPENDED
3171 CODE:
3172 RETVAL = boolSV (coro->flags & ix);
3173 OUTPUT:
3174 RETVAL
3175
3176void
3177throw (Coro::State self, SV *throw = &PL_sv_undef)
3178 PROTOTYPE: $;$
1015 CODE: 3179 CODE:
1016 SV *yieldstack; 3180{
1017 SV *sv; 3181 struct coro *current = SvSTATE_current;
1018 AV *defav = GvAV (PL_defgv); 3182 SV **throwp = self == current ? &CORO_THROW : &self->except;
1019 struct coro *prev, *next; 3183 SvREFCNT_dec (*throwp);
3184 SvGETMAGIC (throw);
3185 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3186}
1020 3187
1021 yieldstack = *hv_fetch ( 3188void
1022 (HV *)SvRV (GvSV (coro_current)), 3189api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1023 "yieldstack", sizeof ("yieldstack") - 1, 3190 PROTOTYPE: $;$
3191 C_ARGS: aTHX_ coro, flags
3192
3193SV *
3194has_cctx (Coro::State coro)
3195 PROTOTYPE: $
3196 CODE:
3197 /* maybe manage the running flag differently */
3198 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3199 OUTPUT:
3200 RETVAL
3201
3202int
3203is_traced (Coro::State coro)
3204 PROTOTYPE: $
3205 CODE:
3206 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3207 OUTPUT:
3208 RETVAL
3209
3210UV
3211rss (Coro::State coro)
3212 PROTOTYPE: $
3213 ALIAS:
3214 usecount = 1
3215 CODE:
3216 switch (ix)
3217 {
3218 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3219 case 1: RETVAL = coro->usecount; break;
1024 0 3220 }
3221 OUTPUT:
3222 RETVAL
3223
3224void
3225force_cctx ()
3226 PROTOTYPE:
3227 CODE:
3228 cctx_current->idle_sp = 0;
3229
3230void
3231swap_defsv (Coro::State self)
3232 PROTOTYPE: $
3233 ALIAS:
3234 swap_defav = 1
3235 CODE:
3236 if (!self->slot)
3237 croak ("cannot swap state with coroutine that has no saved state,");
3238 else
1025 ); 3239 {
3240 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3241 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1026 3242
1027 /* set up @_ -- ugly */ 3243 SV *tmp = *src; *src = *dst; *dst = tmp;
1028 av_clear (defav); 3244 }
1029 av_fill (defav, items - 1);
1030 while (items--)
1031 av_store (defav, items, SvREFCNT_inc (ST(items)));
1032 3245
1033 sv = av_pop ((AV *)SvRV (yieldstack)); 3246void
1034 prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 3247cancel (Coro::State self)
1035 next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 3248 CODE:
1036 SvREFCNT_dec (sv); 3249 coro_state_destroy (aTHX_ self);
3250 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
1037 3251
1038 coro_state_transfer (aTHX_ prev, next, 0); 3252
3253SV *
3254enable_times (int enabled = enable_times)
3255 CODE:
3256{
3257 RETVAL = boolSV (enable_times);
3258
3259 if (enabled != enable_times)
3260 {
3261 enable_times = enabled;
3262
3263 coro_times_update ();
3264 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3265 }
3266}
3267 OUTPUT:
3268 RETVAL
3269
3270void
3271times (Coro::State self)
3272 PPCODE:
3273{
3274 struct coro *current = SvSTATE (coro_current);
3275
3276 if (expect_false (current == self))
3277 {
3278 coro_times_update ();
3279 coro_times_add (SvSTATE (coro_current));
3280 }
3281
3282 EXTEND (SP, 2);
3283 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3284 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3285
3286 if (expect_false (current == self))
3287 coro_times_sub (SvSTATE (coro_current));
3288}
1039 3289
1040MODULE = Coro::State PACKAGE = Coro 3290MODULE = Coro::State PACKAGE = Coro
1041 3291
1042BOOT: 3292BOOT:
1043{ 3293{
1044 int i; 3294 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3295 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3296 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3297 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3298 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3299 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3300 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3301 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3302 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3303
3304 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3305 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3306 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3307 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3308
1045 HV *stash = gv_stashpv ("Coro", TRUE); 3309 coro_stash = gv_stashpv ("Coro", TRUE);
1046 3310
1047 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3311 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1048 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3312 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1049 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3313 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1050 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3314 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1051 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3315 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1052 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3316 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1053
1054 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1055 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1056
1057 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1058 coro_ready[i] = newAV ();
1059 3317
1060 { 3318 {
1061 SV *sv = perl_get_sv("Coro::API", 1); 3319 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1062 3320
1063 coroapi.schedule = api_schedule; 3321 coroapi.schedule = api_schedule;
3322 coroapi.schedule_to = api_schedule_to;
1064 coroapi.cede = api_cede; 3323 coroapi.cede = api_cede;
3324 coroapi.cede_notself = api_cede_notself;
1065 coroapi.ready = api_ready; 3325 coroapi.ready = api_ready;
3326 coroapi.is_ready = api_is_ready;
1066 coroapi.nready = &coro_nready; 3327 coroapi.nready = coro_nready;
1067 coroapi.current = coro_current; 3328 coroapi.current = coro_current;
1068 3329
1069 GCoroAPI = &coroapi; 3330 /*GCoroAPI = &coroapi;*/
1070 sv_setiv (sv, (IV)&coroapi); 3331 sv_setiv (sv, (IV)&coroapi);
1071 SvREADONLY_on (sv); 3332 SvREADONLY_on (sv);
1072 } 3333 }
1073} 3334}
1074 3335
1075#if !PERL_MICRO
1076
1077void 3336void
1078ready(self) 3337terminate (...)
1079 SV * self 3338 CODE:
3339 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3340
3341void
3342schedule (...)
3343 CODE:
3344 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3345
3346void
3347schedule_to (...)
3348 CODE:
3349 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3350
3351void
3352cede_to (...)
3353 CODE:
3354 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3355
3356void
3357cede (...)
3358 CODE:
3359 CORO_EXECUTE_SLF_XS (slf_init_cede);
3360
3361void
3362cede_notself (...)
3363 CODE:
3364 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3365
3366void
3367_set_current (SV *current)
1080 PROTOTYPE: $ 3368 PROTOTYPE: $
1081 CODE: 3369 CODE:
1082 api_ready (self); 3370 SvREFCNT_dec (SvRV (coro_current));
3371 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1083 3372
1084#endif 3373void
3374_set_readyhook (SV *hook)
3375 PROTOTYPE: $
3376 CODE:
3377 SvREFCNT_dec (coro_readyhook);
3378 SvGETMAGIC (hook);
3379 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1085 3380
1086int 3381int
3382prio (Coro::State coro, int newprio = 0)
3383 PROTOTYPE: $;$
3384 ALIAS:
3385 nice = 1
3386 CODE:
3387{
3388 RETVAL = coro->prio;
3389
3390 if (items > 1)
3391 {
3392 if (ix)
3393 newprio = coro->prio - newprio;
3394
3395 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3396 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3397
3398 coro->prio = newprio;
3399 }
3400}
3401 OUTPUT:
3402 RETVAL
3403
3404SV *
3405ready (SV *self)
3406 PROTOTYPE: $
3407 CODE:
3408 RETVAL = boolSV (api_ready (aTHX_ self));
3409 OUTPUT:
3410 RETVAL
3411
3412int
1087nready(...) 3413nready (...)
1088 PROTOTYPE: 3414 PROTOTYPE:
1089 CODE: 3415 CODE:
1090 RETVAL = coro_nready; 3416 RETVAL = coro_nready;
1091 OUTPUT: 3417 OUTPUT:
1092 RETVAL 3418 RETVAL
1093 3419
1094void 3420void
1095schedule(...) 3421suspend (Coro::State self)
1096 PROTOTYPE: 3422 PROTOTYPE: $
1097 CODE: 3423 CODE:
1098 api_schedule (); 3424 self->flags |= CF_SUSPENDED;
1099 3425
1100void 3426void
1101cede(...) 3427resume (Coro::State self)
1102 PROTOTYPE: 3428 PROTOTYPE: $
1103 CODE: 3429 CODE:
1104 api_cede (); 3430 self->flags &= ~CF_SUSPENDED;
1105 3431
1106# and these are hacks 3432void
3433_pool_handler (...)
3434 CODE:
3435 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3436
3437void
3438async_pool (SV *cv, ...)
3439 PROTOTYPE: &@
3440 PPCODE:
3441{
3442 HV *hv = (HV *)av_pop (av_async_pool);
3443 AV *av = newAV ();
3444 SV *cb = ST (0);
3445 int i;
3446
3447 av_extend (av, items - 2);
3448 for (i = 1; i < items; ++i)
3449 av_push (av, SvREFCNT_inc_NN (ST (i)));
3450
3451 if ((SV *)hv == &PL_sv_undef)
3452 {
3453 PUSHMARK (SP);
3454 EXTEND (SP, 2);
3455 PUSHs (sv_Coro);
3456 PUSHs ((SV *)cv_pool_handler);
3457 PUTBACK;
3458 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3459 SPAGAIN;
3460
3461 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3462 }
3463
3464 {
3465 struct coro *coro = SvSTATE_hv (hv);
3466
3467 assert (!coro->invoke_cb);
3468 assert (!coro->invoke_av);
3469 coro->invoke_cb = SvREFCNT_inc (cb);
3470 coro->invoke_av = av;
3471 }
3472
3473 api_ready (aTHX_ (SV *)hv);
3474
3475 if (GIMME_V != G_VOID)
3476 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3477 else
3478 SvREFCNT_dec (hv);
3479}
3480
1107SV * 3481SV *
1108_aio_get_state () 3482rouse_cb ()
3483 PROTOTYPE:
1109 CODE: 3484 CODE:
1110{ 3485 RETVAL = coro_new_rouse_cb (aTHX);
1111 struct {
1112 int errorno;
1113 int laststype;
1114 int laststatval;
1115 Stat_t statcache;
1116 } data;
1117
1118 data.errorno = errno;
1119 data.laststype = PL_laststype;
1120 data.laststatval = PL_laststatval;
1121 data.statcache = PL_statcache;
1122
1123 RETVAL = newSVpvn ((char *)&data, sizeof data);
1124}
1125 OUTPUT: 3486 OUTPUT:
1126 RETVAL 3487 RETVAL
1127 3488
1128void 3489void
1129_aio_set_state (char *data_) 3490rouse_wait (...)
3491 PROTOTYPE: ;$
3492 PPCODE:
3493 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3494
3495void
3496on_enter (SV *block)
3497 ALIAS:
3498 on_leave = 1
1130 PROTOTYPE: $ 3499 PROTOTYPE: &
1131 CODE: 3500 CODE:
1132{ 3501{
1133 struct { 3502 struct coro *coro = SvSTATE_current;
3503 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3504
3505 block = s_get_cv_croak (block);
3506
3507 if (!*avp)
3508 *avp = newAV ();
3509
3510 av_push (*avp, SvREFCNT_inc (block));
3511
3512 if (!ix)
3513 on_enterleave_call (aTHX_ block);
3514
3515 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3516 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3517 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3518}
3519
3520
3521MODULE = Coro::State PACKAGE = PerlIO::cede
3522
3523BOOT:
3524 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3525
3526
3527MODULE = Coro::State PACKAGE = Coro::Semaphore
3528
3529SV *
3530new (SV *klass, SV *count = 0)
3531 CODE:
3532{
3533 int semcnt = 1;
3534
3535 if (count)
3536 {
3537 SvGETMAGIC (count);
3538
3539 if (SvOK (count))
3540 semcnt = SvIV (count);
3541 }
3542
3543 RETVAL = sv_bless (
3544 coro_waitarray_new (aTHX_ semcnt),
3545 GvSTASH (CvGV (cv))
3546 );
3547}
3548 OUTPUT:
3549 RETVAL
3550
3551# helper for Coro::Channel and others
3552SV *
3553_alloc (int count)
3554 CODE:
3555 RETVAL = coro_waitarray_new (aTHX_ count);
3556 OUTPUT:
3557 RETVAL
3558
3559SV *
3560count (SV *self)
3561 CODE:
3562 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3563 OUTPUT:
3564 RETVAL
3565
3566void
3567up (SV *self, int adjust = 1)
3568 ALIAS:
3569 adjust = 1
3570 CODE:
3571 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3572
3573void
3574down (...)
3575 CODE:
3576 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3577
3578void
3579wait (...)
3580 CODE:
3581 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3582
3583void
3584try (SV *self)
3585 PPCODE:
3586{
3587 AV *av = (AV *)SvRV (self);
3588 SV *count_sv = AvARRAY (av)[0];
3589 IV count = SvIVX (count_sv);
3590
3591 if (count > 0)
3592 {
3593 --count;
3594 SvIVX (count_sv) = count;
3595 XSRETURN_YES;
3596 }
3597 else
3598 XSRETURN_NO;
3599}
3600
3601void
3602waiters (SV *self)
3603 PPCODE:
3604{
3605 AV *av = (AV *)SvRV (self);
3606 int wcount = AvFILLp (av) + 1 - 1;
3607
3608 if (GIMME_V == G_SCALAR)
3609 XPUSHs (sv_2mortal (newSViv (wcount)));
3610 else
3611 {
1134 int errorno; 3612 int i;
1135 int laststype; 3613 EXTEND (SP, wcount);
1136 int laststatval; 3614 for (i = 1; i <= wcount; ++i)
1137 Stat_t statcache; 3615 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1138 } *data = (void *)data_; 3616 }
1139
1140 errno = data->errorno;
1141 PL_laststype = data->laststype;
1142 PL_laststatval = data->laststatval;
1143 PL_statcache = data->statcache;
1144} 3617}
3618
3619MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3620
3621void
3622_may_delete (SV *sem, int count, int extra_refs)
3623 PPCODE:
3624{
3625 AV *av = (AV *)SvRV (sem);
3626
3627 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3628 && AvFILLp (av) == 0 /* no waiters, just count */
3629 && SvIV (AvARRAY (av)[0]) == count)
3630 XSRETURN_YES;
3631
3632 XSRETURN_NO;
3633}
3634
3635MODULE = Coro::State PACKAGE = Coro::Signal
3636
3637SV *
3638new (SV *klass)
3639 CODE:
3640 RETVAL = sv_bless (
3641 coro_waitarray_new (aTHX_ 0),
3642 GvSTASH (CvGV (cv))
3643 );
3644 OUTPUT:
3645 RETVAL
3646
3647void
3648wait (...)
3649 CODE:
3650 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3651
3652void
3653broadcast (SV *self)
3654 CODE:
3655{
3656 AV *av = (AV *)SvRV (self);
3657 coro_signal_wake (aTHX_ av, AvFILLp (av));
3658}
3659
3660void
3661send (SV *self)
3662 CODE:
3663{
3664 AV *av = (AV *)SvRV (self);
3665
3666 if (AvFILLp (av))
3667 coro_signal_wake (aTHX_ av, 1);
3668 else
3669 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3670}
3671
3672IV
3673awaited (SV *self)
3674 CODE:
3675 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3676 OUTPUT:
3677 RETVAL
3678
3679
3680MODULE = Coro::State PACKAGE = Coro::AnyEvent
3681
3682BOOT:
3683 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3684
3685void
3686_schedule (...)
3687 CODE:
3688{
3689 static int incede;
3690
3691 api_cede_notself (aTHX);
3692
3693 ++incede;
3694 while (coro_nready >= incede && api_cede (aTHX))
3695 ;
3696
3697 sv_setsv (sv_activity, &PL_sv_undef);
3698 if (coro_nready >= incede)
3699 {
3700 PUSHMARK (SP);
3701 PUTBACK;
3702 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3703 }
3704
3705 --incede;
3706}
3707
3708
3709MODULE = Coro::State PACKAGE = Coro::AIO
3710
3711void
3712_register (char *target, char *proto, SV *req)
3713 CODE:
3714{
3715 SV *req_cv = s_get_cv_croak (req);
3716 /* newXSproto doesn't return the CV on 5.8 */
3717 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3718 sv_setpv ((SV *)slf_cv, proto);
3719 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3720}
3721

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