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Comparing Coro/Coro/State.xs (file contents):
Revision 1.218 by root, Mon Dec 3 00:41:45 2007 UTC vs.
Revision 1.404 by root, Fri Jun 10 12:27:02 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
4#define PERL_EXT 9#define PERL_EXT
5 10
6#include "EXTERN.h" 11#include "EXTERN.h"
7#include "perl.h" 12#include "perl.h"
8#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
9 15
10#include "patchlevel.h" 16#include "schmorp.h"
17#include "ecb.h"
11 18
19#include <stddef.h>
12#include <stdio.h> 20#include <stdio.h>
13#include <errno.h> 21#include <errno.h>
14#include <assert.h> 22#include <assert.h>
23
24#ifndef SVs_PADSTALE
25# define SVs_PADSTALE 0
26#endif
27
28#if defined(_WIN32)
29# undef HAS_GETTIMEOFDAY
30# undef setjmp
31# undef longjmp
32# undef _exit
33# define setjmp _setjmp /* deep magic */
34#else
15#include <inttypes.h> /* portable stdint.h */ 35# include <inttypes.h> /* most portable stdint.h */
36#endif
16 37
17#ifdef HAVE_MMAP 38#ifdef HAVE_MMAP
18# include <unistd.h> 39# include <unistd.h>
19# include <sys/mman.h> 40# include <sys/mman.h>
20# ifndef MAP_ANONYMOUS 41# ifndef MAP_ANONYMOUS
… …
37# define BOOT_PAGESIZE (void)0 58# define BOOT_PAGESIZE (void)0
38#endif 59#endif
39 60
40#if CORO_USE_VALGRIND 61#if CORO_USE_VALGRIND
41# include <valgrind/valgrind.h> 62# include <valgrind/valgrind.h>
42# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
43#else
44# define REGISTER_STACK(cctx,start,end)
45#endif 63#endif
46 64
47/* the maximum number of idle cctx that will be pooled */ 65/* the maximum number of idle cctx that will be pooled */
48#define MAX_IDLE_CCTX 8 66static int cctx_max_idle = 4;
49
50#define PERL_VERSION_ATLEAST(a,b,c) \
51 (PERL_REVISION > (a) \
52 || (PERL_REVISION == (a) \
53 && (PERL_VERSION > (b) \
54 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
55
56#if !PERL_VERSION_ATLEAST (5,6,0)
57# ifndef PL_ppaddr
58# define PL_ppaddr ppaddr
59# endif
60# ifndef call_sv
61# define call_sv perl_call_sv
62# endif
63# ifndef get_sv
64# define get_sv perl_get_sv
65# endif
66# ifndef get_cv
67# define get_cv perl_get_cv
68# endif
69# ifndef IS_PADGV
70# define IS_PADGV(v) 0
71# endif
72# ifndef IS_PADCONST
73# define IS_PADCONST(v) 0
74# endif
75#endif
76
77/* 5.8.7 */
78#ifndef SvRV_set
79# define SvRV_set(s,v) SvRV(s) = (v)
80#endif
81
82/* 5.8.8 */
83#ifndef GV_NOTQUAL
84# define GV_NOTQUAL 0
85#endif
86#ifndef newSV
87# define newSV(l) NEWSV(0,l)
88#endif
89 67
90#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 68#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
91# undef CORO_STACKGUARD 69# undef CORO_STACKGUARD
92#endif 70#endif
93 71
… …
100# define CORO_PREFER_PERL_FUNCTIONS 0 78# define CORO_PREFER_PERL_FUNCTIONS 0
101#endif 79#endif
102 80
103/* The next macros try to return the current stack pointer, in an as 81/* The next macros try to return the current stack pointer, in an as
104 * portable way as possible. */ 82 * portable way as possible. */
105#define dSTACKLEVEL volatile char stacklevel
106#define STACKLEVEL ((void *)&stacklevel)
107
108#define IN_DESTRUCT (PL_main_cv == Nullcv)
109
110#if __GNUC__ >= 3 83#if __GNUC__ >= 4
111# define attribute(x) __attribute__(x) 84# define dSTACKLEVEL int stacklevel_dummy
112# define BARRIER __asm__ __volatile__ ("" : : : "memory") 85# define STACKLEVEL __builtin_frame_address (0)
113# define expect(expr,value) __builtin_expect ((expr),(value))
114#else 86#else
115# define attribute(x) 87# define dSTACKLEVEL volatile void *stacklevel
116# define BARRIER 88# define STACKLEVEL ((void *)&stacklevel)
117# define expect(expr,value) (expr)
118#endif 89#endif
119 90
120#define expect_false(expr) expect ((expr) != 0, 0) 91#define IN_DESTRUCT PL_dirty
121#define expect_true(expr) expect ((expr) != 0, 1)
122
123#define NOINLINE attribute ((noinline))
124 92
125#include "CoroAPI.h" 93#include "CoroAPI.h"
94#define GCoroAPI (&coroapi) /* very sneaky */
126 95
127#ifdef USE_ITHREADS 96#ifdef USE_ITHREADS
128static perl_mutex coro_mutex; 97# if CORO_PTHREAD
129# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 98static void *coro_thx;
130# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 99# endif
131#else
132# define LOCK (void)0
133# define UNLOCK (void)0
134#endif 100#endif
135 101
136/* helper storage struct for Coro::AIO */ 102#ifdef __linux
137struct io_state 103# include <time.h> /* for timespec */
138{ 104# include <syscall.h> /* for SYS_* */
139 int errorno; 105# ifdef SYS_clock_gettime
140 I32 laststype; 106# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
141 int laststatval; 107# define CORO_CLOCK_MONOTONIC 1
142 Stat_t statcache; 108# define CORO_CLOCK_THREAD_CPUTIME_ID 3
143}; 109# endif
110#endif
144 111
112static double (*nvtime)(); /* so why doesn't it take void? */
113static void (*u2time)(pTHX_ UV ret[2]);
114
115/* we hijack an hopefully unused CV flag for our purposes */
116#define CVf_SLF 0x4000
117static OP *pp_slf (pTHX);
118static void slf_destroy (pTHX_ struct coro *coro);
119
120static U32 cctx_gen;
145static size_t coro_stacksize = CORO_STACKSIZE; 121static size_t cctx_stacksize = CORO_STACKSIZE;
146static struct CoroAPI coroapi; 122static struct CoroAPI coroapi;
147static AV *main_mainstack; /* used to differentiate between $main and others */ 123static AV *main_mainstack; /* used to differentiate between $main and others */
148static JMPENV *main_top_env; 124static JMPENV *main_top_env;
149static HV *coro_state_stash, *coro_stash; 125static HV *coro_state_stash, *coro_stash;
150static volatile SV *coro_mortal; /* will be freed after next transfer */ 126static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
127
128static AV *av_destroy; /* destruction queue */
129static SV *sv_manager; /* the manager coro */
130static SV *sv_idle; /* $Coro::idle */
151 131
152static GV *irsgv; /* $/ */ 132static GV *irsgv; /* $/ */
153static GV *stdoutgv; /* *STDOUT */ 133static GV *stdoutgv; /* *STDOUT */
154static SV *rv_diehook; 134static SV *rv_diehook;
155static SV *rv_warnhook; 135static SV *rv_warnhook;
156static HV *hv_sig; /* %SIG */ 136static HV *hv_sig; /* %SIG */
157 137
158/* async_pool helper stuff */ 138/* async_pool helper stuff */
159static SV *sv_pool_rss; 139static SV *sv_pool_rss;
160static SV *sv_pool_size; 140static SV *sv_pool_size;
141static SV *sv_async_pool_idle; /* description string */
161static AV *av_async_pool; 142static AV *av_async_pool; /* idle pool */
143static SV *sv_Coro; /* class string */
144static CV *cv_pool_handler;
145
146/* Coro::AnyEvent */
147static SV *sv_activity;
148
149/* enable processtime/realtime profiling */
150static char enable_times;
151typedef U32 coro_ts[2];
152static coro_ts time_real, time_cpu;
153static char times_valid;
162 154
163static struct coro_cctx *cctx_first; 155static struct coro_cctx *cctx_first;
164static int cctx_count, cctx_idle; 156static int cctx_count, cctx_idle;
165 157
166enum { 158enum
159{
167 CC_MAPPED = 0x01, 160 CC_MAPPED = 0x01,
168 CC_NOREUSE = 0x02, /* throw this away after tracing */ 161 CC_NOREUSE = 0x02, /* throw this away after tracing */
169 CC_TRACE = 0x04, 162 CC_TRACE = 0x04,
170 CC_TRACE_SUB = 0x08, /* trace sub calls */ 163 CC_TRACE_SUB = 0x08, /* trace sub calls */
171 CC_TRACE_LINE = 0x10, /* trace each statement */ 164 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 165 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173}; 166};
174 167
175/* this is a structure representing a c-level coroutine */ 168/* this is a structure representing a c-level coroutine */
176typedef struct coro_cctx { 169typedef struct coro_cctx
170{
177 struct coro_cctx *next; 171 struct coro_cctx *next;
178 172
179 /* the stack */ 173 /* the stack */
180 void *sptr; 174 void *sptr;
181 size_t ssize; 175 size_t ssize;
… …
184 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 178 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
185 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 179 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
186 JMPENV *top_env; 180 JMPENV *top_env;
187 coro_context cctx; 181 coro_context cctx;
188 182
183 U32 gen;
189#if CORO_USE_VALGRIND 184#if CORO_USE_VALGRIND
190 int valgrind_id; 185 int valgrind_id;
191#endif 186#endif
192 unsigned char flags; 187 unsigned char flags;
193} coro_cctx; 188} coro_cctx;
194 189
190static coro_cctx *cctx_current; /* the currently running cctx */
191
192/*****************************************************************************/
193
194static MGVTBL coro_state_vtbl;
195
195enum { 196enum
197{
196 CF_RUNNING = 0x0001, /* coroutine is running */ 198 CF_RUNNING = 0x0001, /* coroutine is running */
197 CF_READY = 0x0002, /* coroutine is ready */ 199 CF_READY = 0x0002, /* coroutine is ready */
198 CF_NEW = 0x0004, /* has never been switched to */ 200 CF_NEW = 0x0004, /* has never been switched to */
199 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 201 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
202 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
203 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
200}; 204};
201 205
202/* the structure where most of the perl state is stored, overlaid on the cxstack */ 206/* the structure where most of the perl state is stored, overlaid on the cxstack */
203typedef struct { 207typedef struct
208{
204 SV *defsv; 209 SV *defsv;
205 AV *defav; 210 AV *defav;
206 SV *errsv; 211 SV *errsv;
207 SV *irsgv; 212 SV *irsgv;
213 HV *hinthv;
208#define VAR(name,type) type name; 214#define VAR(name,type) type name;
209# include "state.h" 215# include "state.h"
210#undef VAR 216#undef VAR
211} perl_slots; 217} perl_slots;
212 218
219// how many context stack entries do we need for perl_slots
213#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 220#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
214 221
215/* this is a structure representing a perl-level coroutine */ 222/* this is a structure representing a perl-level coroutine */
216struct coro { 223struct coro
224{
217 /* the c coroutine allocated to this perl coroutine, if any */ 225 /* the C coroutine allocated to this perl coroutine, if any */
218 coro_cctx *cctx; 226 coro_cctx *cctx;
219 227
220 /* process data */ 228 /* ready queue */
229 struct coro *next_ready;
230
231 /* state data */
232 struct CoroSLF slf_frame; /* saved slf frame */
221 AV *mainstack; 233 AV *mainstack;
222 perl_slots *slot; /* basically the saved sp */ 234 perl_slots *slot; /* basically the saved sp */
223 235
236 CV *startcv; /* the CV to execute */
224 AV *args; /* data associated with this coroutine (initial args) */ 237 AV *args; /* data associated with this coroutine (initial args) */
225 int refcnt; /* coroutines are refcounted, yes */
226 int flags; /* CF_ flags */ 238 int flags; /* CF_ flags */
227 HV *hv; /* the perl hash associated with this coro, if any */ 239 HV *hv; /* the perl hash associated with this coro, if any */
228 240
229 /* statistics */ 241 /* statistics */
230 int usecount; /* number of transfers to this coro */ 242 int usecount; /* number of transfers to this coro */
231 243
232 /* coro process data */ 244 /* coro process data */
233 int prio; 245 int prio;
234 SV *throw; /* exception to be thrown */ 246 SV *except; /* exception to be thrown */
247 SV *rouse_cb; /* last rouse callback */
248 AV *on_destroy; /* callbacks or coros to notify on destroy */
249 AV *status; /* the exit status list */
235 250
236 /* async_pool */ 251 /* async_pool */
237 SV *saved_deffh; 252 SV *saved_deffh;
253 SV *invoke_cb;
254 AV *invoke_av;
255
256 /* on_enter/on_leave */
257 AV *on_enter;
258 AV *on_leave;
259
260 /* swap_sv */
261 AV *swap_sv;
262
263 /* times */
264 coro_ts t_cpu, t_real;
238 265
239 /* linked list */ 266 /* linked list */
240 struct coro *next, *prev; 267 struct coro *next, *prev;
241}; 268};
242 269
243typedef struct coro *Coro__State; 270typedef struct coro *Coro__State;
244typedef struct coro *Coro__State_or_hashref; 271typedef struct coro *Coro__State_or_hashref;
245 272
273/* the following variables are effectively part of the perl context */
274/* and get copied between struct coro and these variables */
275/* the main reason we don't support windows process emulation */
276static struct CoroSLF slf_frame; /* the current slf frame */
277
246/** Coro ********************************************************************/ 278/** Coro ********************************************************************/
247 279
248#define PRIO_MAX 3 280#define CORO_PRIO_MAX 3
249#define PRIO_HIGH 1 281#define CORO_PRIO_HIGH 1
250#define PRIO_NORMAL 0 282#define CORO_PRIO_NORMAL 0
251#define PRIO_LOW -1 283#define CORO_PRIO_LOW -1
252#define PRIO_IDLE -3 284#define CORO_PRIO_IDLE -3
253#define PRIO_MIN -4 285#define CORO_PRIO_MIN -4
254 286
255/* for Coro.pm */ 287/* for Coro.pm */
256static SV *coro_current; 288static SV *coro_current;
257static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 289static SV *coro_readyhook;
258static int coro_nready; 290static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
291static CV *cv_coro_run;
259static struct coro *coro_first; 292static struct coro *coro_first;
293#define coro_nready coroapi.nready
294
295/** Coro::Select ************************************************************/
296
297static OP *(*coro_old_pp_sselect) (pTHX);
298static SV *coro_select_select;
299
300/* horrible hack, but if it works... */
301static OP *
302coro_pp_sselect (pTHX)
303{
304 dSP;
305 PUSHMARK (SP - 4); /* fake argument list */
306 XPUSHs (coro_select_select);
307 PUTBACK;
308
309 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
310 PL_op->op_flags |= OPf_STACKED;
311 PL_op->op_private = 0;
312 return PL_ppaddr [OP_ENTERSUB](aTHX);
313}
314
315/** time stuff **************************************************************/
316
317#ifdef HAS_GETTIMEOFDAY
318
319ECB_INLINE void
320coro_u2time (pTHX_ UV ret[2])
321{
322 struct timeval tv;
323 gettimeofday (&tv, 0);
324
325 ret [0] = tv.tv_sec;
326 ret [1] = tv.tv_usec;
327}
328
329ECB_INLINE double
330coro_nvtime ()
331{
332 struct timeval tv;
333 gettimeofday (&tv, 0);
334
335 return tv.tv_sec + tv.tv_usec * 1e-6;
336}
337
338ECB_INLINE void
339time_init (pTHX)
340{
341 nvtime = coro_nvtime;
342 u2time = coro_u2time;
343}
344
345#else
346
347ECB_INLINE void
348time_init (pTHX)
349{
350 SV **svp;
351
352 require_pv ("Time/HiRes.pm");
353
354 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
355
356 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
357 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
358
359 nvtime = INT2PTR (double (*)(), SvIV (*svp));
360
361 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
362 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
363}
364
365#endif
260 366
261/** lowlevel stuff **********************************************************/ 367/** lowlevel stuff **********************************************************/
262 368
263static SV * 369static SV * ecb_noinline
264coro_get_sv (pTHX_ const char *name, int create) 370coro_get_sv (pTHX_ const char *name, int create)
265{ 371{
266#if PERL_VERSION_ATLEAST (5,9,0) 372#if PERL_VERSION_ATLEAST (5,10,0)
267 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 373 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
268 get_sv (name, create); 374 get_sv (name, create);
269#endif 375#endif
270 return get_sv (name, create); 376 return get_sv (name, create);
271} 377}
272 378
273static AV * 379static AV * ecb_noinline
274coro_get_av (pTHX_ const char *name, int create) 380coro_get_av (pTHX_ const char *name, int create)
275{ 381{
276#if PERL_VERSION_ATLEAST (5,9,0) 382#if PERL_VERSION_ATLEAST (5,10,0)
277 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 383 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
278 get_av (name, create); 384 get_av (name, create);
279#endif 385#endif
280 return get_av (name, create); 386 return get_av (name, create);
281} 387}
282 388
283static HV * 389static HV * ecb_noinline
284coro_get_hv (pTHX_ const char *name, int create) 390coro_get_hv (pTHX_ const char *name, int create)
285{ 391{
286#if PERL_VERSION_ATLEAST (5,9,0) 392#if PERL_VERSION_ATLEAST (5,10,0)
287 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 393 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
288 get_hv (name, create); 394 get_hv (name, create);
289#endif 395#endif
290 return get_hv (name, create); 396 return get_hv (name, create);
291} 397}
292 398
293static AV * 399ECB_INLINE void
400coro_times_update ()
401{
402#ifdef coro_clock_gettime
403 struct timespec ts;
404
405 ts.tv_sec = ts.tv_nsec = 0;
406 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
407 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
408
409 ts.tv_sec = ts.tv_nsec = 0;
410 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
411 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
412#else
413 dTHX;
414 UV tv[2];
415
416 u2time (aTHX_ tv);
417 time_real [0] = tv [0];
418 time_real [1] = tv [1] * 1000;
419#endif
420}
421
422ECB_INLINE void
423coro_times_add (struct coro *c)
424{
425 c->t_real [1] += time_real [1];
426 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
427 c->t_real [0] += time_real [0];
428
429 c->t_cpu [1] += time_cpu [1];
430 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
431 c->t_cpu [0] += time_cpu [0];
432}
433
434ECB_INLINE void
435coro_times_sub (struct coro *c)
436{
437 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
438 c->t_real [1] -= time_real [1];
439 c->t_real [0] -= time_real [0];
440
441 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
442 c->t_cpu [1] -= time_cpu [1];
443 c->t_cpu [0] -= time_cpu [0];
444}
445
446/*****************************************************************************/
447/* magic glue */
448
449#define CORO_MAGIC_type_cv 26
450#define CORO_MAGIC_type_state PERL_MAGIC_ext
451
452#define CORO_MAGIC_NN(sv, type) \
453 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
454 ? SvMAGIC (sv) \
455 : mg_find (sv, type))
456
457#define CORO_MAGIC(sv, type) \
458 (ecb_expect_true (SvMAGIC (sv)) \
459 ? CORO_MAGIC_NN (sv, type) \
460 : 0)
461
462#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
463#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
464
465ECB_INLINE MAGIC *
466SvSTATEhv_p (pTHX_ SV *coro)
467{
468 MAGIC *mg;
469
470 if (ecb_expect_true (
471 SvTYPE (coro) == SVt_PVHV
472 && (mg = CORO_MAGIC_state (coro))
473 && mg->mg_virtual == &coro_state_vtbl
474 ))
475 return mg;
476
477 return 0;
478}
479
480ECB_INLINE struct coro *
481SvSTATE_ (pTHX_ SV *coro)
482{
483 MAGIC *mg;
484
485 if (SvROK (coro))
486 coro = SvRV (coro);
487
488 mg = SvSTATEhv_p (aTHX_ coro);
489 if (!mg)
490 croak ("Coro::State object required");
491
492 return (struct coro *)mg->mg_ptr;
493}
494
495#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
496
497/* faster than SvSTATE, but expects a coroutine hv */
498#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
499#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
500
501/*****************************************************************************/
502/* padlist management and caching */
503
504ECB_INLINE AV *
294coro_clone_padlist (pTHX_ CV *cv) 505coro_derive_padlist (pTHX_ CV *cv)
295{ 506{
296 AV *padlist = CvPADLIST (cv); 507 AV *padlist = CvPADLIST (cv);
297 AV *newpadlist, *newpad; 508 AV *newpadlist, *newpad;
298 509
299 newpadlist = newAV (); 510 newpadlist = newAV ();
300 AvREAL_off (newpadlist); 511 AvREAL_off (newpadlist);
301#if PERL_VERSION_ATLEAST (5,9,0) 512#if PERL_VERSION_ATLEAST (5,10,0)
302 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 513 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
303#else 514#else
304 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 515 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
305#endif 516#endif
306 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 517 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
307 --AvFILLp (padlist); 518 --AvFILLp (padlist);
308 519
309 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 520 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
310 av_store (newpadlist, 1, (SV *)newpad); 521 av_store (newpadlist, 1, (SV *)newpad);
311 522
312 return newpadlist; 523 return newpadlist;
313} 524}
314 525
315static void 526ECB_INLINE void
316free_padlist (pTHX_ AV *padlist) 527free_padlist (pTHX_ AV *padlist)
317{ 528{
318 /* may be during global destruction */ 529 /* may be during global destruction */
319 if (SvREFCNT (padlist)) 530 if (!IN_DESTRUCT)
320 { 531 {
321 I32 i = AvFILLp (padlist); 532 I32 i = AvFILLp (padlist);
322 while (i >= 0) 533
534 while (i > 0) /* special-case index 0 */
323 { 535 {
324 SV **svp = av_fetch (padlist, i--, FALSE); 536 /* we try to be extra-careful here */
325 if (svp) 537 AV *av = (AV *)AvARRAY (padlist)[i--];
326 { 538 I32 j = AvFILLp (av);
327 SV *sv; 539
328 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 540 while (j >= 0)
541 SvREFCNT_dec (AvARRAY (av)[j--]);
542
543 AvFILLp (av) = -1;
329 SvREFCNT_dec (sv); 544 SvREFCNT_dec (av);
330
331 SvREFCNT_dec (*svp);
332 }
333 } 545 }
334 546
547 SvREFCNT_dec (AvARRAY (padlist)[0]);
548
549 AvFILLp (padlist) = -1;
335 SvREFCNT_dec ((SV*)padlist); 550 SvREFCNT_dec ((SV*)padlist);
336 } 551 }
337} 552}
338 553
339static int 554static int
340coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 555coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
341{ 556{
342 AV *padlist; 557 AV *padlist;
343 AV *av = (AV *)mg->mg_obj; 558 AV *av = (AV *)mg->mg_obj;
559
560 /* perl manages to free our internal AV and _then_ call us */
561 if (IN_DESTRUCT)
562 return 0;
344 563
345 /* casting is fun. */ 564 /* casting is fun. */
346 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 565 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
347 free_padlist (aTHX_ padlist); 566 free_padlist (aTHX_ padlist);
348 567
568 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
569
349 return 0; 570 return 0;
350} 571}
351
352#define CORO_MAGIC_type_cv PERL_MAGIC_ext
353#define CORO_MAGIC_type_state PERL_MAGIC_ext
354 572
355static MGVTBL coro_cv_vtbl = { 573static MGVTBL coro_cv_vtbl = {
356 0, 0, 0, 0, 574 0, 0, 0, 0,
357 coro_cv_free 575 coro_cv_free
358}; 576};
359 577
360#define CORO_MAGIC(sv,type) \
361 SvMAGIC (sv) \
362 ? SvMAGIC (sv)->mg_type == type \
363 ? SvMAGIC (sv) \
364 : mg_find (sv, type) \
365 : 0
366
367#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
368#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
369
370static struct coro *
371SvSTATE_ (pTHX_ SV *coro)
372{
373 HV *stash;
374 MAGIC *mg;
375
376 if (SvROK (coro))
377 coro = SvRV (coro);
378
379 if (expect_false (SvTYPE (coro) != SVt_PVHV))
380 croak ("Coro::State object required");
381
382 stash = SvSTASH (coro);
383 if (expect_false (stash != coro_stash && stash != coro_state_stash))
384 {
385 /* very slow, but rare, check */
386 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
387 croak ("Coro::State object required");
388 }
389
390 mg = CORO_MAGIC_state (coro);
391 return (struct coro *)mg->mg_ptr;
392}
393
394#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
395
396/* the next two functions merely cache the padlists */ 578/* the next two functions merely cache the padlists */
397static void 579ECB_INLINE void
398get_padlist (pTHX_ CV *cv) 580get_padlist (pTHX_ CV *cv)
399{ 581{
400 MAGIC *mg = CORO_MAGIC_cv (cv); 582 MAGIC *mg = CORO_MAGIC_cv (cv);
401 AV *av; 583 AV *av;
402 584
403 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 585 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
404 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 586 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
405 else 587 else
406 { 588 {
407#if CORO_PREFER_PERL_FUNCTIONS 589#if CORO_PREFER_PERL_FUNCTIONS
408 /* this is probably cleaner, but also slower? */ 590 /* this is probably cleaner? but also slower! */
591 /* in practise, it seems to be less stable */
409 CV *cp = Perl_cv_clone (cv); 592 CV *cp = Perl_cv_clone (aTHX_ cv);
410 CvPADLIST (cv) = CvPADLIST (cp); 593 CvPADLIST (cv) = CvPADLIST (cp);
411 CvPADLIST (cp) = 0; 594 CvPADLIST (cp) = 0;
412 SvREFCNT_dec (cp); 595 SvREFCNT_dec (cp);
413#else 596#else
414 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 597 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
415#endif 598#endif
416 } 599 }
417} 600}
418 601
419static void 602ECB_INLINE void
420put_padlist (pTHX_ CV *cv) 603put_padlist (pTHX_ CV *cv)
421{ 604{
422 MAGIC *mg = CORO_MAGIC_cv (cv); 605 MAGIC *mg = CORO_MAGIC_cv (cv);
423 AV *av; 606 AV *av;
424 607
425 if (expect_false (!mg)) 608 if (ecb_expect_false (!mg))
426 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 609 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
427 610
428 av = (AV *)mg->mg_obj; 611 av = (AV *)mg->mg_obj;
429 612
430 if (expect_false (AvFILLp (av) >= AvMAX (av))) 613 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
431 av_extend (av, AvMAX (av) + 1); 614 av_extend (av, AvFILLp (av) + 1);
432 615
433 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 616 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
434} 617}
435 618
436/** load & save, init *******************************************************/ 619/** load & save, init *******************************************************/
620
621/* swap sv heads, at least logically */
622static void
623swap_svs (pTHX_ Coro__State c)
624{
625 int i;
626
627 for (i = 0; i <= AvFILLp (c->swap_sv); )
628 {
629 SV *a = AvARRAY (c->swap_sv)[i++];
630 SV *b = AvARRAY (c->swap_sv)[i++];
631
632 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
633 SV tmp;
634
635 /* swap sv_any */
636 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
637
638 /* swap sv_flags */
639 SvFLAGS (&tmp) = SvFLAGS (a);
640 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
641 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
642
643#if PERL_VERSION_ATLEAST (5,10,0)
644 /* perl 5.10 complicates this _quite_ a bit, but it also is
645 * much faster, so no quarrels here. alternatively, we could
646 * sv_upgrade to avoid this.
647 */
648 {
649 /* swap sv_u */
650 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
651
652 /* if SvANY points to the head, we need to adjust the pointers,
653 * as the pointer for a still points to b, and maybe vice versa.
654 */
655 #define svany_in_head(type) \
656 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
657
658 if (svany_in_head (SvTYPE (a)))
659 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
660
661 if (svany_in_head (SvTYPE (b)))
662 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
663 }
664#endif
665 }
666}
667
668#define SWAP_SVS(coro) \
669 if (ecb_expect_false ((coro)->swap_sv)) \
670 swap_svs (aTHX_ (coro))
671
672static void
673on_enterleave_call (pTHX_ SV *cb);
437 674
438static void 675static void
439load_perl (pTHX_ Coro__State c) 676load_perl (pTHX_ Coro__State c)
440{ 677{
441 perl_slots *slot = c->slot; 678 perl_slots *slot = c->slot;
442 c->slot = 0; 679 c->slot = 0;
443 680
444 PL_mainstack = c->mainstack; 681 PL_mainstack = c->mainstack;
445 682
446 GvSV (PL_defgv) = slot->defsv; 683 GvSV (PL_defgv) = slot->defsv;
447 GvAV (PL_defgv) = slot->defav; 684 GvAV (PL_defgv) = slot->defav;
448 GvSV (PL_errgv) = slot->errsv; 685 GvSV (PL_errgv) = slot->errsv;
449 GvSV (irsgv) = slot->irsgv; 686 GvSV (irsgv) = slot->irsgv;
687 GvHV (PL_hintgv) = slot->hinthv;
450 688
451 #define VAR(name,type) PL_ ## name = slot->name; 689 #define VAR(name,type) PL_ ## name = slot->name;
452 # include "state.h" 690 # include "state.h"
453 #undef VAR 691 #undef VAR
454 692
… …
456 dSP; 694 dSP;
457 695
458 CV *cv; 696 CV *cv;
459 697
460 /* now do the ugly restore mess */ 698 /* now do the ugly restore mess */
461 while (expect_true (cv = (CV *)POPs)) 699 while (ecb_expect_true (cv = (CV *)POPs))
462 { 700 {
463 put_padlist (aTHX_ cv); /* mark this padlist as available */ 701 put_padlist (aTHX_ cv); /* mark this padlist as available */
464 CvDEPTH (cv) = PTR2IV (POPs); 702 CvDEPTH (cv) = PTR2IV (POPs);
465 CvPADLIST (cv) = (AV *)POPs; 703 CvPADLIST (cv) = (AV *)POPs;
466 } 704 }
467 705
468 PUTBACK; 706 PUTBACK;
469 } 707 }
708
709 slf_frame = c->slf_frame;
710 CORO_THROW = c->except;
711
712 if (ecb_expect_false (enable_times))
713 {
714 if (ecb_expect_false (!times_valid))
715 coro_times_update ();
716
717 coro_times_sub (c);
718 }
719
720 if (ecb_expect_false (c->on_enter))
721 {
722 int i;
723
724 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
725 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
726 }
727
728 SWAP_SVS (c);
470} 729}
471 730
472static void 731static void
473save_perl (pTHX_ Coro__State c) 732save_perl (pTHX_ Coro__State c)
474{ 733{
734 SWAP_SVS (c);
735
736 if (ecb_expect_false (c->on_leave))
737 {
738 int i;
739
740 for (i = AvFILLp (c->on_leave); i >= 0; --i)
741 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
742 }
743
744 times_valid = 0;
745
746 if (ecb_expect_false (enable_times))
747 {
748 coro_times_update (); times_valid = 1;
749 coro_times_add (c);
750 }
751
752 c->except = CORO_THROW;
753 c->slf_frame = slf_frame;
754
475 { 755 {
476 dSP; 756 dSP;
477 I32 cxix = cxstack_ix; 757 I32 cxix = cxstack_ix;
478 PERL_CONTEXT *ccstk = cxstack; 758 PERL_CONTEXT *ccstk = cxstack;
479 PERL_SI *top_si = PL_curstackinfo; 759 PERL_SI *top_si = PL_curstackinfo;
… …
485 765
486 XPUSHs (Nullsv); 766 XPUSHs (Nullsv);
487 /* this loop was inspired by pp_caller */ 767 /* this loop was inspired by pp_caller */
488 for (;;) 768 for (;;)
489 { 769 {
490 while (expect_true (cxix >= 0)) 770 while (ecb_expect_true (cxix >= 0))
491 { 771 {
492 PERL_CONTEXT *cx = &ccstk[cxix--]; 772 PERL_CONTEXT *cx = &ccstk[cxix--];
493 773
494 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 774 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
495 { 775 {
496 CV *cv = cx->blk_sub.cv; 776 CV *cv = cx->blk_sub.cv;
497 777
498 if (expect_true (CvDEPTH (cv))) 778 if (ecb_expect_true (CvDEPTH (cv)))
499 { 779 {
500 EXTEND (SP, 3); 780 EXTEND (SP, 3);
501 PUSHs ((SV *)CvPADLIST (cv)); 781 PUSHs ((SV *)CvPADLIST (cv));
502 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 782 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
503 PUSHs ((SV *)cv); 783 PUSHs ((SV *)cv);
504 784
505 CvDEPTH (cv) = 0; 785 CvDEPTH (cv) = 0;
506 get_padlist (aTHX_ cv); 786 get_padlist (aTHX_ cv);
507 } 787 }
508 } 788 }
509 } 789 }
510 790
511 if (expect_true (top_si->si_type == PERLSI_MAIN)) 791 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
512 break; 792 break;
513 793
514 top_si = top_si->si_prev; 794 top_si = top_si->si_prev;
515 ccstk = top_si->si_cxstack; 795 ccstk = top_si->si_cxstack;
516 cxix = top_si->si_cxix; 796 cxix = top_si->si_cxix;
… …
518 798
519 PUTBACK; 799 PUTBACK;
520 } 800 }
521 801
522 /* allocate some space on the context stack for our purposes */ 802 /* allocate some space on the context stack for our purposes */
523 /* we manually unroll here, as usually 2 slots is enough */ 803 if (ecb_expect_false (cxstack_ix + SLOT_COUNT >= cxstack_max))
524 if (SLOT_COUNT >= 1) CXINC;
525 if (SLOT_COUNT >= 2) CXINC;
526 if (SLOT_COUNT >= 3) CXINC;
527 { 804 {
528 int i; 805 unsigned int i;
806
529 for (i = 3; i < SLOT_COUNT; ++i) 807 for (i = 0; i < SLOT_COUNT; ++i)
530 CXINC; 808 CXINC;
531 } 809
532 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 810 cxstack_ix -= SLOT_COUNT; /* undo allocation */
811 }
533 812
534 c->mainstack = PL_mainstack; 813 c->mainstack = PL_mainstack;
535 814
536 { 815 {
537 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 816 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
538 817
539 slot->defav = GvAV (PL_defgv); 818 slot->defav = GvAV (PL_defgv);
540 slot->defsv = DEFSV; 819 slot->defsv = DEFSV;
541 slot->errsv = ERRSV; 820 slot->errsv = ERRSV;
542 slot->irsgv = GvSV (irsgv); 821 slot->irsgv = GvSV (irsgv);
822 slot->hinthv = GvHV (PL_hintgv);
543 823
544 #define VAR(name,type) slot->name = PL_ ## name; 824 #define VAR(name,type) slot->name = PL_ ## name;
545 # include "state.h" 825 # include "state.h"
546 #undef VAR 826 #undef VAR
547 } 827 }
548} 828}
549 829
550/* 830/*
551 * allocate various perl stacks. This is an exact copy 831 * allocate various perl stacks. This is almost an exact copy
552 * of perl.c:init_stacks, except that it uses less memory 832 * of perl.c:init_stacks, except that it uses less memory
553 * on the (sometimes correct) assumption that coroutines do 833 * on the (sometimes correct) assumption that coroutines do
554 * not usually need a lot of stackspace. 834 * not usually need a lot of stackspace.
555 */ 835 */
556#if CORO_PREFER_PERL_FUNCTIONS 836#if CORO_PREFER_PERL_FUNCTIONS
557# define coro_init_stacks init_stacks 837# define coro_init_stacks(thx) init_stacks ()
558#else 838#else
559static void 839static void
560coro_init_stacks (pTHX) 840coro_init_stacks (pTHX)
561{ 841{
562 PL_curstackinfo = new_stackinfo(32, 8); 842 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
563 PL_curstackinfo->si_type = PERLSI_MAIN; 843 PL_curstackinfo->si_type = PERLSI_MAIN;
564 PL_curstack = PL_curstackinfo->si_stack; 844 PL_curstack = PL_curstackinfo->si_stack;
565 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 845 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
566 846
567 PL_stack_base = AvARRAY(PL_curstack); 847 PL_stack_base = AvARRAY(PL_curstack);
… …
587 867
588 New(54,PL_savestack,24,ANY); 868 New(54,PL_savestack,24,ANY);
589 PL_savestack_ix = 0; 869 PL_savestack_ix = 0;
590 PL_savestack_max = 24; 870 PL_savestack_max = 24;
591 871
592#if !PERL_VERSION_ATLEAST (5,9,0) 872#if !PERL_VERSION_ATLEAST (5,10,0)
593 New(54,PL_retstack,4,OP*); 873 New(54,PL_retstack,4,OP*);
594 PL_retstack_ix = 0; 874 PL_retstack_ix = 0;
595 PL_retstack_max = 4; 875 PL_retstack_max = 4;
596#endif 876#endif
597} 877}
… …
599 879
600/* 880/*
601 * destroy the stacks, the callchain etc... 881 * destroy the stacks, the callchain etc...
602 */ 882 */
603static void 883static void
604coro_destroy_stacks (pTHX) 884coro_destruct_stacks (pTHX)
605{ 885{
606 while (PL_curstackinfo->si_next) 886 while (PL_curstackinfo->si_next)
607 PL_curstackinfo = PL_curstackinfo->si_next; 887 PL_curstackinfo = PL_curstackinfo->si_next;
608 888
609 while (PL_curstackinfo) 889 while (PL_curstackinfo)
… …
620 900
621 Safefree (PL_tmps_stack); 901 Safefree (PL_tmps_stack);
622 Safefree (PL_markstack); 902 Safefree (PL_markstack);
623 Safefree (PL_scopestack); 903 Safefree (PL_scopestack);
624 Safefree (PL_savestack); 904 Safefree (PL_savestack);
625#if !PERL_VERSION_ATLEAST (5,9,0) 905#if !PERL_VERSION_ATLEAST (5,10,0)
626 Safefree (PL_retstack); 906 Safefree (PL_retstack);
627#endif 907#endif
628} 908}
629 909
910#define CORO_RSS \
911 rss += sizeof (SYM (curstackinfo)); \
912 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
913 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
914 rss += SYM (tmps_max) * sizeof (SV *); \
915 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
916 rss += SYM (scopestack_max) * sizeof (I32); \
917 rss += SYM (savestack_max) * sizeof (ANY);
918
630static size_t 919static size_t
631coro_rss (pTHX_ struct coro *coro) 920coro_rss (pTHX_ struct coro *coro)
632{ 921{
633 size_t rss = sizeof (*coro); 922 size_t rss = sizeof (*coro);
634 923
635 if (coro->mainstack) 924 if (coro->mainstack)
636 { 925 {
637 perl_slots tmp_slot;
638 perl_slots *slot;
639
640 if (coro->flags & CF_RUNNING) 926 if (coro->flags & CF_RUNNING)
641 { 927 {
642 slot = &tmp_slot; 928 #define SYM(sym) PL_ ## sym
643 929 CORO_RSS;
644 #define VAR(name,type) slot->name = PL_ ## name;
645 # include "state.h"
646 #undef VAR 930 #undef SYM
647 } 931 }
648 else 932 else
649 slot = coro->slot; 933 {
934 #define SYM(sym) coro->slot->sym
935 CORO_RSS;
936 #undef SYM
937 }
938 }
650 939
651 rss += sizeof (slot->curstackinfo); 940 return rss;
652 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 941}
653 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
654 rss += slot->tmps_max * sizeof (SV *);
655 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
656 rss += slot->scopestack_max * sizeof (I32);
657 rss += slot->savestack_max * sizeof (ANY);
658 942
659#if !PERL_VERSION_ATLEAST (5,9,0) 943/** coroutine stack handling ************************************************/
660 rss += slot->retstack_max * sizeof (OP *); 944
945static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
946static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
947static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
948
949/* apparently < 5.8.8 */
950#ifndef MgPV_nolen_const
951#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
952 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
953 (const char*)(mg)->mg_ptr)
661#endif 954#endif
662 }
663
664 return rss;
665}
666
667/** coroutine stack handling ************************************************/
668
669#if 0
670static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
671 955
672/* 956/*
673 * This overrides the default magic get method of %SIG elements. 957 * This overrides the default magic get method of %SIG elements.
674 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 958 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
675 * and instead of tryign to save and restore the hash elements, we just provide 959 * and instead of trying to save and restore the hash elements (extremely slow),
676 * readback here. 960 * we just provide our own readback here.
677 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
678 * not expecting this to actually change the hook. This is a potential problem
679 * when a schedule happens then, but we ignore this.
680 */ 961 */
962static int ecb_cold
963coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
964{
965 const char *s = MgPV_nolen_const (mg);
966
967 if (*s == '_')
968 {
969 SV **svp = 0;
970
971 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
972 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
973
974 if (svp)
975 {
976 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
977 return 0;
978 }
979 }
980
981 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
982}
983
984static int ecb_cold
985coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
986{
987 const char *s = MgPV_nolen_const (mg);
988
989 if (*s == '_')
990 {
991 SV **svp = 0;
992
993 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
994 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
995
996 if (svp)
997 {
998 SV *old = *svp;
999 *svp = 0;
1000 SvREFCNT_dec (old);
1001 return 0;
1002 }
1003 }
1004
1005 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1006}
1007
1008static int ecb_cold
1009coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1010{
1011 const char *s = MgPV_nolen_const (mg);
1012
1013 if (*s == '_')
1014 {
1015 SV **svp = 0;
1016
1017 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1018 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1019
1020 if (svp)
1021 {
1022 SV *old = *svp;
1023 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1024 SvREFCNT_dec (old);
1025 return 0;
1026 }
1027 }
1028
1029 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1030}
1031
1032static void
1033prepare_nop (pTHX_ struct coro_transfer_args *ta)
1034{
1035 /* kind of mega-hacky, but works */
1036 ta->next = ta->prev = (struct coro *)ta;
1037}
1038
681static int 1039static int
682coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 1040slf_check_nop (pTHX_ struct CoroSLF *frame)
683{ 1041{
684 return orig_sigelem_get (aTHX_ sv, mg); 1042 return 0;
685 const char *s = MgPV_nolen_const (mg);
686
687 if (*s == '_')
688 {
689 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
690 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
691 }
692
693 return orig_sigelem_get (aTHX_ sv, mg);
694} 1043}
695#endif
696 1044
697static void 1045static int
1046slf_check_repeat (pTHX_ struct CoroSLF *frame)
1047{
1048 return 1;
1049}
1050
1051static UNOP init_perl_op;
1052
1053ecb_noinline static void /* noinline to keep it out of the transfer fast path */
698coro_setup (pTHX_ struct coro *coro) 1054init_perl (pTHX_ struct coro *coro)
699{ 1055{
700 /* 1056 /*
701 * emulate part of the perl startup here. 1057 * emulate part of the perl startup here.
702 */ 1058 */
703 coro_init_stacks (aTHX); 1059 coro_init_stacks (aTHX);
704 1060
705 PL_runops = RUNOPS_DEFAULT; 1061 PL_runops = RUNOPS_DEFAULT;
706 PL_curcop = &PL_compiling; 1062 PL_curcop = &PL_compiling;
707 PL_in_eval = EVAL_NULL; 1063 PL_in_eval = EVAL_NULL;
708 PL_comppad = 0; 1064 PL_comppad = 0;
1065 PL_comppad_name = 0;
1066 PL_comppad_name_fill = 0;
1067 PL_comppad_name_floor = 0;
709 PL_curpm = 0; 1068 PL_curpm = 0;
710 PL_curpad = 0; 1069 PL_curpad = 0;
711 PL_localizing = 0; 1070 PL_localizing = 0;
712 PL_dirty = 0;
713 PL_restartop = 0; 1071 PL_restartop = 0;
1072#if PERL_VERSION_ATLEAST (5,10,0)
1073 PL_parser = 0;
1074#endif
1075 PL_hints = 0;
714 1076
715 /* recreate the die/warn hooks */ 1077 /* recreate the die/warn hooks */
716 PL_diehook = 0;
717 hv_store (hv_sig, "__DIE__", sizeof ("__DIE__") - 1, newSV (0), 0);
718 PL_diehook = SvREFCNT_inc (rv_diehook); 1078 PL_diehook = SvREFCNT_inc (rv_diehook);
719
720 PL_warnhook = 0;
721 hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, newSV (0), 0);
722 PL_warnhook = SvREFCNT_inc (rv_warnhook); 1079 PL_warnhook = SvREFCNT_inc (rv_warnhook);
723 1080
724 GvSV (PL_defgv) = newSV (0); 1081 GvSV (PL_defgv) = newSV (0);
725 GvAV (PL_defgv) = coro->args; coro->args = 0; 1082 GvAV (PL_defgv) = coro->args; coro->args = 0;
726 GvSV (PL_errgv) = newSV (0); 1083 GvSV (PL_errgv) = newSV (0);
727 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1084 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1085 GvHV (PL_hintgv) = 0;
728 PL_rs = newSVsv (GvSV (irsgv)); 1086 PL_rs = newSVsv (GvSV (irsgv));
729 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 1087 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
730 1088
731 { 1089 {
732 dSP; 1090 dSP;
733 LOGOP myop; 1091 UNOP myop;
734 1092
735 Zero (&myop, 1, LOGOP); 1093 Zero (&myop, 1, UNOP);
736 myop.op_next = Nullop; 1094 myop.op_next = Nullop;
1095 myop.op_type = OP_ENTERSUB;
737 myop.op_flags = OPf_WANT_VOID; 1096 myop.op_flags = OPf_WANT_VOID;
738 1097
739 PUSHMARK (SP); 1098 PUSHMARK (SP);
740 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1099 PUSHs ((SV *)coro->startcv);
741 PUTBACK; 1100 PUTBACK;
742 PL_op = (OP *)&myop; 1101 PL_op = (OP *)&myop;
743 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1102 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
744 SPAGAIN;
745 } 1103 }
746 1104
747 /* this newly created coroutine might be run on an existing cctx which most 1105 /* this newly created coroutine might be run on an existing cctx which most
748 * likely was suspended in set_stacklevel, called from entersub. 1106 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
749 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
750 * so we ENTER here for symmetry
751 */ 1107 */
752 ENTER; 1108 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
753} 1109 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1110 slf_frame.destroy = 0;
754 1111
1112 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1113 init_perl_op.op_next = PL_op;
1114 init_perl_op.op_type = OP_ENTERSUB;
1115 init_perl_op.op_ppaddr = pp_slf;
1116 /* no flags etc. required, as an init function won't be called */
1117
1118 PL_op = (OP *)&init_perl_op;
1119
1120 /* copy throw, in case it was set before init_perl */
1121 CORO_THROW = coro->except;
1122
1123 SWAP_SVS (coro);
1124
1125 if (ecb_expect_false (enable_times))
1126 {
1127 coro_times_update ();
1128 coro_times_sub (coro);
1129 }
1130}
1131
755static void 1132static void
756coro_destroy (pTHX_ struct coro *coro) 1133coro_unwind_stacks (pTHX)
757{ 1134{
758 if (!IN_DESTRUCT) 1135 if (!IN_DESTRUCT)
759 { 1136 {
760 /* restore all saved variables and stuff */ 1137 /* restore all saved variables and stuff */
761 LEAVE_SCOPE (0); 1138 LEAVE_SCOPE (0);
… …
769 POPSTACK_TO (PL_mainstack); 1146 POPSTACK_TO (PL_mainstack);
770 1147
771 /* unwind main stack */ 1148 /* unwind main stack */
772 dounwind (-1); 1149 dounwind (-1);
773 } 1150 }
1151}
774 1152
775 SvREFCNT_dec (GvSV (PL_defgv)); 1153static void
776 SvREFCNT_dec (GvAV (PL_defgv)); 1154destroy_perl (pTHX_ struct coro *coro)
777 SvREFCNT_dec (GvSV (PL_errgv)); 1155{
778 SvREFCNT_dec (PL_defoutgv); 1156 SV *svf [9];
779 SvREFCNT_dec (PL_rs);
780 SvREFCNT_dec (GvSV (irsgv));
781 1157
782 SvREFCNT_dec (PL_diehook);
783 SvREFCNT_dec (PL_warnhook);
784 1158 {
1159 SV *old_current = SvRV (coro_current);
1160 struct coro *current = SvSTATE (old_current);
1161
1162 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1163
1164 save_perl (aTHX_ current);
1165
1166 /* this will cause transfer_check to croak on block*/
1167 SvRV_set (coro_current, (SV *)coro->hv);
1168
1169 load_perl (aTHX_ coro);
1170
1171 coro_unwind_stacks (aTHX);
1172
1173 /* restore swapped sv's */
1174 SWAP_SVS (coro);
1175
1176 coro_destruct_stacks (aTHX);
1177
1178 // now save some sv's to be free'd later
1179 svf [0] = GvSV (PL_defgv);
1180 svf [1] = (SV *)GvAV (PL_defgv);
1181 svf [2] = GvSV (PL_errgv);
1182 svf [3] = (SV *)PL_defoutgv;
1183 svf [4] = PL_rs;
1184 svf [5] = GvSV (irsgv);
1185 svf [6] = (SV *)GvHV (PL_hintgv);
1186 svf [7] = PL_diehook;
1187 svf [8] = PL_warnhook;
1188 assert (9 == sizeof (svf) / sizeof (*svf));
1189
1190 SvRV_set (coro_current, old_current);
1191
1192 load_perl (aTHX_ current);
1193 }
1194
1195 {
1196 unsigned int i;
1197
1198 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1199 SvREFCNT_dec (svf [i]);
1200
785 SvREFCNT_dec (coro->saved_deffh); 1201 SvREFCNT_dec (coro->saved_deffh);
786 SvREFCNT_dec (coro->throw); 1202 SvREFCNT_dec (coro->rouse_cb);
787 1203 SvREFCNT_dec (coro->invoke_cb);
788 coro_destroy_stacks (aTHX); 1204 SvREFCNT_dec (coro->invoke_av);
1205 }
789} 1206}
790 1207
791static void 1208ECB_INLINE void
792free_coro_mortal (pTHX) 1209free_coro_mortal (pTHX)
793{ 1210{
794 if (expect_true (coro_mortal)) 1211 if (ecb_expect_true (coro_mortal))
795 { 1212 {
796 SvREFCNT_dec (coro_mortal); 1213 SvREFCNT_dec ((SV *)coro_mortal);
797 coro_mortal = 0; 1214 coro_mortal = 0;
798 } 1215 }
799} 1216}
800 1217
801static int 1218static int
802runops_trace (pTHX) 1219runops_trace (pTHX)
803{ 1220{
804 COP *oldcop = 0; 1221 COP *oldcop = 0;
805 int oldcxix = -2; 1222 int oldcxix = -2;
806 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
807 coro_cctx *cctx = coro->cctx;
808 1223
809 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1224 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
810 { 1225 {
811 PERL_ASYNC_CHECK (); 1226 PERL_ASYNC_CHECK ();
812 1227
813 if (cctx->flags & CC_TRACE_ALL) 1228 if (cctx_current->flags & CC_TRACE_ALL)
814 { 1229 {
815 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1230 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
816 { 1231 {
817 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1232 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
818 SV **bot, **top; 1233 SV **bot, **top;
819 AV *av = newAV (); /* return values */ 1234 AV *av = newAV (); /* return values */
820 SV **cb; 1235 SV **cb;
… …
830 : cx->blk_gimme == G_SCALAR ? bot + 1 1245 : cx->blk_gimme == G_SCALAR ? bot + 1
831 : bot; 1246 : bot;
832 1247
833 av_extend (av, top - bot); 1248 av_extend (av, top - bot);
834 while (bot < top) 1249 while (bot < top)
835 av_push (av, SvREFCNT_inc (*bot++)); 1250 av_push (av, SvREFCNT_inc_NN (*bot++));
836 1251
837 PL_runops = RUNOPS_DEFAULT; 1252 PL_runops = RUNOPS_DEFAULT;
838 ENTER; 1253 ENTER;
839 SAVETMPS; 1254 SAVETMPS;
840 EXTEND (SP, 3); 1255 EXTEND (SP, 3);
… …
857 1272
858 if (PL_curcop != &PL_compiling) 1273 if (PL_curcop != &PL_compiling)
859 { 1274 {
860 SV **cb; 1275 SV **cb;
861 1276
862 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1277 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
863 { 1278 {
864 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1279 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
865 1280
866 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1281 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
867 { 1282 {
868 runops_proc_t old_runops = PL_runops;
869 dSP; 1283 dSP;
870 GV *gv = CvGV (cx->blk_sub.cv); 1284 GV *gv = CvGV (cx->blk_sub.cv);
871 SV *fullname = sv_2mortal (newSV (0)); 1285 SV *fullname = sv_2mortal (newSV (0));
872 1286
873 if (isGV (gv)) 1287 if (isGV (gv))
… …
878 SAVETMPS; 1292 SAVETMPS;
879 EXTEND (SP, 3); 1293 EXTEND (SP, 3);
880 PUSHMARK (SP); 1294 PUSHMARK (SP);
881 PUSHs (&PL_sv_yes); 1295 PUSHs (&PL_sv_yes);
882 PUSHs (fullname); 1296 PUSHs (fullname);
883 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1297 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
884 PUTBACK; 1298 PUTBACK;
885 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1299 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
886 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1300 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
887 SPAGAIN; 1301 SPAGAIN;
888 FREETMPS; 1302 FREETMPS;
… …
891 } 1305 }
892 1306
893 oldcxix = cxstack_ix; 1307 oldcxix = cxstack_ix;
894 } 1308 }
895 1309
896 if (cctx->flags & CC_TRACE_LINE) 1310 if (cctx_current->flags & CC_TRACE_LINE)
897 { 1311 {
898 dSP; 1312 dSP;
899 1313
900 PL_runops = RUNOPS_DEFAULT; 1314 PL_runops = RUNOPS_DEFAULT;
901 ENTER; 1315 ENTER;
… …
920 1334
921 TAINT_NOT; 1335 TAINT_NOT;
922 return 0; 1336 return 0;
923} 1337}
924 1338
925/* inject a fake call to Coro::State::_cctx_init into the execution */ 1339static struct CoroSLF cctx_ssl_frame;
926/* _cctx_init should be careful, as it could be called at almost any time */
927/* during execution of a perl program */
928static void NOINLINE
929cctx_prepare (pTHX_ coro_cctx *cctx)
930{
931 dSP;
932 LOGOP myop;
933 1340
1341static void
1342slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1343{
1344 ta->prev = 0;
1345}
1346
1347static int
1348slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1349{
1350 *frame = cctx_ssl_frame;
1351
1352 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1353}
1354
1355/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1356static void ecb_noinline
1357cctx_prepare (pTHX)
1358{
934 PL_top_env = &PL_start_env; 1359 PL_top_env = &PL_start_env;
935 1360
936 if (cctx->flags & CC_TRACE) 1361 if (cctx_current->flags & CC_TRACE)
937 PL_runops = runops_trace; 1362 PL_runops = runops_trace;
938 1363
939 Zero (&myop, 1, LOGOP); 1364 /* we already must be executing an SLF op, there is no other valid way
940 myop.op_next = PL_op; 1365 * that can lead to creation of a new cctx */
941 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1366 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1367 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
942 1368
943 PUSHMARK (SP); 1369 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
944 EXTEND (SP, 2); 1370 cctx_ssl_frame = slf_frame;
945 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1371
946 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1372 slf_frame.prepare = slf_prepare_set_stacklevel;
947 PUTBACK; 1373 slf_frame.check = slf_check_set_stacklevel;
948 PL_op = (OP *)&myop; 1374}
949 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1375
950 SPAGAIN; 1376/* the tail of transfer: execute stuff we can only do after a transfer */
1377ECB_INLINE void
1378transfer_tail (pTHX)
1379{
1380 free_coro_mortal (aTHX);
951} 1381}
952 1382
953/* 1383/*
954 * this is a _very_ stripped down perl interpreter ;) 1384 * this is a _very_ stripped down perl interpreter ;)
955 */ 1385 */
956static void 1386static void
957cctx_run (void *arg) 1387cctx_run (void *arg)
958{ 1388{
1389#ifdef USE_ITHREADS
1390# if CORO_PTHREAD
1391 PERL_SET_CONTEXT (coro_thx);
1392# endif
1393#endif
1394 {
959 dTHX; 1395 dTHX;
960 1396
961 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1397 /* normally we would need to skip the entersub here */
962 UNLOCK; 1398 /* not doing so will re-execute it, which is exactly what we want */
963
964 /* we now skip the entersub that lead to transfer() */
965 PL_op = PL_op->op_next; 1399 /* PL_nop = PL_nop->op_next */
966 1400
967 /* inject a fake subroutine call to cctx_init */ 1401 /* inject a fake subroutine call to cctx_init */
968 cctx_prepare (aTHX_ (coro_cctx *)arg); 1402 cctx_prepare (aTHX);
969 1403
1404 /* cctx_run is the alternative tail of transfer() */
1405 transfer_tail (aTHX);
1406
970 /* somebody or something will hit me for both perl_run and PL_restartop */ 1407 /* somebody or something will hit me for both perl_run and PL_restartop */
971 PL_restartop = PL_op; 1408 PL_restartop = PL_op;
972 perl_run (PL_curinterp); 1409 perl_run (PL_curinterp);
973
974 /* 1410 /*
1411 * Unfortunately, there is no way to get at the return values of the
1412 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1413 * runtime errors here, as this is just a random interpreter, not a thread.
1414 */
1415
1416 /*
975 * If perl-run returns we assume exit() was being called or the coro 1417 * If perl-run returns we assume exit() was being called or the coro
976 * fell off the end, which seems to be the only valid (non-bug) 1418 * fell off the end, which seems to be the only valid (non-bug)
977 * reason for perl_run to return. We try to exit by jumping to the 1419 * reason for perl_run to return. We try to exit by jumping to the
978 * bootstrap-time "top" top_env, as we cannot restore the "main" 1420 * bootstrap-time "top" top_env, as we cannot restore the "main"
979 * coroutine as Coro has no such concept 1421 * coroutine as Coro has no such concept.
1422 * This actually isn't valid with the pthread backend, but OSes requiring
1423 * that backend are too broken to do it in a standards-compliant way.
980 */ 1424 */
981 PL_top_env = main_top_env; 1425 PL_top_env = main_top_env;
982 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1426 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1427 }
983} 1428}
984 1429
985static coro_cctx * 1430static coro_cctx *
986cctx_new () 1431cctx_new ()
987{ 1432{
988 coro_cctx *cctx; 1433 coro_cctx *cctx;
1434
1435 ++cctx_count;
1436 New (0, cctx, 1, coro_cctx);
1437
1438 cctx->gen = cctx_gen;
1439 cctx->flags = 0;
1440 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1441
1442 return cctx;
1443}
1444
1445/* create a new cctx only suitable as source */
1446static coro_cctx *
1447cctx_new_empty ()
1448{
1449 coro_cctx *cctx = cctx_new ();
1450
1451 cctx->sptr = 0;
1452 coro_create (&cctx->cctx, 0, 0, 0, 0);
1453
1454 return cctx;
1455}
1456
1457/* create a new cctx suitable as destination/running a perl interpreter */
1458static coro_cctx *
1459cctx_new_run ()
1460{
1461 coro_cctx *cctx = cctx_new ();
989 void *stack_start; 1462 void *stack_start;
990 size_t stack_size; 1463 size_t stack_size;
991 1464
992 ++cctx_count;
993
994 Newz (0, cctx, 1, coro_cctx);
995
996#if HAVE_MMAP 1465#if HAVE_MMAP
997 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1466 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
998 /* mmap supposedly does allocate-on-write for us */ 1467 /* mmap supposedly does allocate-on-write for us */
999 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1468 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1000 1469
1001 if (cctx->sptr != (void *)-1) 1470 if (cctx->sptr != (void *)-1)
1002 { 1471 {
1003# if CORO_STACKGUARD 1472 #if CORO_STACKGUARD
1004 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1473 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1005# endif 1474 #endif
1006 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1475 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1007 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1476 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1008 cctx->flags |= CC_MAPPED; 1477 cctx->flags |= CC_MAPPED;
1009 } 1478 }
1010 else 1479 else
1011#endif 1480#endif
1012 { 1481 {
1013 cctx->ssize = coro_stacksize * (long)sizeof (long); 1482 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1014 New (0, cctx->sptr, coro_stacksize, long); 1483 New (0, cctx->sptr, cctx_stacksize, long);
1015 1484
1016 if (!cctx->sptr) 1485 if (!cctx->sptr)
1017 { 1486 {
1018 perror ("FATAL: unable to allocate stack for coroutine"); 1487 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1019 _exit (EXIT_FAILURE); 1488 _exit (EXIT_FAILURE);
1020 } 1489 }
1021 1490
1022 stack_start = cctx->sptr; 1491 stack_start = cctx->sptr;
1023 stack_size = cctx->ssize; 1492 stack_size = cctx->ssize;
1024 } 1493 }
1025 1494
1026 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1495 #if CORO_USE_VALGRIND
1496 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1497 #endif
1498
1027 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1499 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1028 1500
1029 return cctx; 1501 return cctx;
1030} 1502}
1031 1503
… …
1033cctx_destroy (coro_cctx *cctx) 1505cctx_destroy (coro_cctx *cctx)
1034{ 1506{
1035 if (!cctx) 1507 if (!cctx)
1036 return; 1508 return;
1037 1509
1510 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1511
1038 --cctx_count; 1512 --cctx_count;
1513 coro_destroy (&cctx->cctx);
1039 1514
1515 /* coro_transfer creates new, empty cctx's */
1516 if (cctx->sptr)
1517 {
1040#if CORO_USE_VALGRIND 1518 #if CORO_USE_VALGRIND
1041 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1519 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1520 #endif
1521
1522#if HAVE_MMAP
1523 if (cctx->flags & CC_MAPPED)
1524 munmap (cctx->sptr, cctx->ssize);
1525 else
1042#endif 1526#endif
1043
1044#if HAVE_MMAP
1045 if (cctx->flags & CC_MAPPED)
1046 munmap (cctx->sptr, cctx->ssize);
1047 else
1048#endif
1049 Safefree (cctx->sptr); 1527 Safefree (cctx->sptr);
1528 }
1050 1529
1051 Safefree (cctx); 1530 Safefree (cctx);
1052} 1531}
1053 1532
1054/* wether this cctx should be destructed */ 1533/* wether this cctx should be destructed */
1055#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1534#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1056 1535
1057static coro_cctx * 1536static coro_cctx *
1058cctx_get (pTHX) 1537cctx_get (pTHX)
1059{ 1538{
1060 while (expect_true (cctx_first)) 1539 while (ecb_expect_true (cctx_first))
1061 { 1540 {
1062 coro_cctx *cctx = cctx_first; 1541 coro_cctx *cctx = cctx_first;
1063 cctx_first = cctx->next; 1542 cctx_first = cctx->next;
1064 --cctx_idle; 1543 --cctx_idle;
1065 1544
1066 if (expect_true (!CCTX_EXPIRED (cctx))) 1545 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1067 return cctx; 1546 return cctx;
1068 1547
1069 cctx_destroy (cctx); 1548 cctx_destroy (cctx);
1070 } 1549 }
1071 1550
1072 return cctx_new (); 1551 return cctx_new_run ();
1073} 1552}
1074 1553
1075static void 1554static void
1076cctx_put (coro_cctx *cctx) 1555cctx_put (coro_cctx *cctx)
1077{ 1556{
1557 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1558
1078 /* free another cctx if overlimit */ 1559 /* free another cctx if overlimit */
1079 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1560 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1080 { 1561 {
1081 coro_cctx *first = cctx_first; 1562 coro_cctx *first = cctx_first;
1082 cctx_first = first->next; 1563 cctx_first = first->next;
1083 --cctx_idle; 1564 --cctx_idle;
1084 1565
… …
1093/** coroutine switching *****************************************************/ 1574/** coroutine switching *****************************************************/
1094 1575
1095static void 1576static void
1096transfer_check (pTHX_ struct coro *prev, struct coro *next) 1577transfer_check (pTHX_ struct coro *prev, struct coro *next)
1097{ 1578{
1579 /* TODO: throwing up here is considered harmful */
1580
1098 if (expect_true (prev != next)) 1581 if (ecb_expect_true (prev != next))
1099 { 1582 {
1100 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1583 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1101 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1584 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1102 1585
1103 if (expect_false (next->flags & CF_RUNNING)) 1586 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1104 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1105
1106 if (expect_false (next->flags & CF_DESTROYED))
1107 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1587 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1108 1588
1109 if (
1110#if PERL_VERSION_ATLEAST (5,9,0) 1589#if !PERL_VERSION_ATLEAST (5,10,0)
1111 expect_false (PL_parser)
1112#else
1113 expect_false (PL_lex_state != LEX_NOTPARSING) 1590 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1591 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1114#endif 1592#endif
1115 )
1116 croak ("Coro::State::transfer called while parsing, but this is not supported");
1117 } 1593 }
1118} 1594}
1119 1595
1120/* always use the TRANSFER macro */ 1596/* always use the TRANSFER macro */
1121static void NOINLINE 1597static void ecb_noinline /* noinline so we have a fixed stackframe */
1122transfer (pTHX_ struct coro *prev, struct coro *next) 1598transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1123{ 1599{
1124 dSTACKLEVEL; 1600 dSTACKLEVEL;
1125 static volatile int has_throw;
1126 1601
1127 /* sometimes transfer is only called to set idle_sp */ 1602 /* sometimes transfer is only called to set idle_sp */
1128 if (expect_false (!next)) 1603 if (ecb_expect_false (!prev))
1129 { 1604 {
1130 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1605 cctx_current->idle_sp = STACKLEVEL;
1131 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1606 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1132 } 1607 }
1133 else if (expect_true (prev != next)) 1608 else if (ecb_expect_true (prev != next))
1134 { 1609 {
1135 coro_cctx *prev__cctx; 1610 coro_cctx *cctx_prev;
1136 1611
1137 if (expect_false (prev->flags & CF_NEW)) 1612 if (ecb_expect_false (prev->flags & CF_NEW))
1138 { 1613 {
1139 /* create a new empty context */ 1614 /* create a new empty/source context */
1140 Newz (0, prev->cctx, 1, coro_cctx);
1141 prev->flags &= ~CF_NEW; 1615 prev->flags &= ~CF_NEW;
1142 prev->flags |= CF_RUNNING; 1616 prev->flags |= CF_RUNNING;
1143 } 1617 }
1144 1618
1145 prev->flags &= ~CF_RUNNING; 1619 prev->flags &= ~CF_RUNNING;
1146 next->flags |= CF_RUNNING; 1620 next->flags |= CF_RUNNING;
1147 1621
1148 LOCK;
1149
1150 /* first get rid of the old state */ 1622 /* first get rid of the old state */
1151 save_perl (aTHX_ prev); 1623 save_perl (aTHX_ prev);
1152 1624
1153 if (expect_false (next->flags & CF_NEW)) 1625 if (ecb_expect_false (next->flags & CF_NEW))
1154 { 1626 {
1155 /* need to start coroutine */ 1627 /* need to start coroutine */
1156 next->flags &= ~CF_NEW; 1628 next->flags &= ~CF_NEW;
1157 /* setup coroutine call */ 1629 /* setup coroutine call */
1158 coro_setup (aTHX_ next); 1630 init_perl (aTHX_ next);
1159 } 1631 }
1160 else 1632 else
1161 load_perl (aTHX_ next); 1633 load_perl (aTHX_ next);
1162 1634
1163 prev__cctx = prev->cctx;
1164
1165 /* possibly "free" the cctx */ 1635 /* possibly untie and reuse the cctx */
1166 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))) 1636 if (ecb_expect_true (
1637 cctx_current->idle_sp == STACKLEVEL
1638 && !(cctx_current->flags & CC_TRACE)
1639 && !force_cctx
1640 ))
1167 { 1641 {
1168 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1642 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1169 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1643 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1170 1644
1171 prev->cctx = 0;
1172
1173 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1645 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1174 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1646 /* without this the next cctx_get might destroy the running cctx while still in use */
1175 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1647 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1176 if (!next->cctx) 1648 if (ecb_expect_true (!next->cctx))
1177 next->cctx = cctx_get (aTHX); 1649 next->cctx = cctx_get (aTHX);
1178 1650
1179 cctx_put (prev__cctx); 1651 cctx_put (cctx_current);
1180 } 1652 }
1653 else
1654 prev->cctx = cctx_current;
1181 1655
1182 ++next->usecount; 1656 ++next->usecount;
1183 1657
1184 if (expect_true (!next->cctx)) 1658 cctx_prev = cctx_current;
1185 next->cctx = cctx_get (aTHX); 1659 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1186 1660
1187 has_throw = !!next->throw; 1661 next->cctx = 0;
1188 1662
1189 if (expect_false (prev__cctx != next->cctx)) 1663 if (ecb_expect_false (cctx_prev != cctx_current))
1190 { 1664 {
1191 prev__cctx->top_env = PL_top_env; 1665 cctx_prev->top_env = PL_top_env;
1192 PL_top_env = next->cctx->top_env; 1666 PL_top_env = cctx_current->top_env;
1193 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1667 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1194 } 1668 }
1195 1669
1196 free_coro_mortal (aTHX); 1670 transfer_tail (aTHX);
1197 UNLOCK;
1198
1199 if (expect_false (has_throw))
1200 {
1201 struct coro *coro = SvSTATE (coro_current);
1202
1203 if (coro->throw)
1204 {
1205 SV *exception = coro->throw;
1206 coro->throw = 0;
1207 sv_setsv (ERRSV, exception);
1208 croak (0);
1209 }
1210 }
1211 } 1671 }
1212} 1672}
1213 1673
1214struct transfer_args
1215{
1216 struct coro *prev, *next;
1217};
1218
1219#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1674#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1220#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1675#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1221 1676
1222/** high level stuff ********************************************************/ 1677/** high level stuff ********************************************************/
1223 1678
1679/* this function is actually Coro, not Coro::State, but we call it from here */
1680/* because it is convenient - but it hasn't been declared yet for that reason */
1224static int 1681static void
1682coro_call_on_destroy (pTHX_ struct coro *coro);
1683
1684static void
1225coro_state_destroy (pTHX_ struct coro *coro) 1685coro_state_destroy (pTHX_ struct coro *coro)
1226{ 1686{
1227 if (coro->flags & CF_DESTROYED) 1687 if (coro->flags & CF_ZOMBIE)
1228 return 0; 1688 return;
1229 1689
1690 slf_destroy (aTHX_ coro);
1691
1230 coro->flags |= CF_DESTROYED; 1692 coro->flags |= CF_ZOMBIE;
1231 1693
1232 if (coro->flags & CF_READY) 1694 if (coro->flags & CF_READY)
1233 { 1695 {
1234 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1696 /* reduce nready, as destroying a ready coro effectively unreadies it */
1235 /* alternative: look through all ready queues and remove the coro */ 1697 /* alternative: look through all ready queues and remove the coro */
1236 LOCK;
1237 --coro_nready; 1698 --coro_nready;
1238 UNLOCK;
1239 } 1699 }
1240 else 1700 else
1241 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1701 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1242
1243 if (coro->mainstack && coro->mainstack != main_mainstack)
1244 {
1245 struct coro temp;
1246
1247 if (coro->flags & CF_RUNNING)
1248 croak ("FATAL: tried to destroy currently running coroutine");
1249
1250 save_perl (aTHX_ &temp);
1251 load_perl (aTHX_ coro);
1252
1253 coro_destroy (aTHX_ coro);
1254
1255 load_perl (aTHX_ &temp);
1256
1257 coro->slot = 0;
1258 }
1259
1260 cctx_destroy (coro->cctx);
1261 SvREFCNT_dec (coro->args);
1262 1702
1263 if (coro->next) coro->next->prev = coro->prev; 1703 if (coro->next) coro->next->prev = coro->prev;
1264 if (coro->prev) coro->prev->next = coro->next; 1704 if (coro->prev) coro->prev->next = coro->next;
1265 if (coro == coro_first) coro_first = coro->next; 1705 if (coro == coro_first) coro_first = coro->next;
1266 1706
1267 return 1; 1707 if (coro->mainstack
1708 && coro->mainstack != main_mainstack
1709 && coro->slot
1710 && !PL_dirty)
1711 destroy_perl (aTHX_ coro);
1712
1713 cctx_destroy (coro->cctx);
1714 SvREFCNT_dec (coro->startcv);
1715 SvREFCNT_dec (coro->args);
1716 SvREFCNT_dec (coro->swap_sv);
1717 SvREFCNT_dec (CORO_THROW);
1718
1719 coro_call_on_destroy (aTHX_ coro);
1720
1721 /* more destruction mayhem in coro_state_free */
1268} 1722}
1269 1723
1270static int 1724static int
1271coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1725coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1272{ 1726{
1273 struct coro *coro = (struct coro *)mg->mg_ptr; 1727 struct coro *coro = (struct coro *)mg->mg_ptr;
1274 mg->mg_ptr = 0; 1728 mg->mg_ptr = 0;
1275 1729
1276 coro->hv = 0;
1277
1278 if (--coro->refcnt < 0)
1279 {
1280 coro_state_destroy (aTHX_ coro); 1730 coro_state_destroy (aTHX_ coro);
1731 SvREFCNT_dec (coro->on_destroy);
1732 SvREFCNT_dec (coro->status);
1733
1281 Safefree (coro); 1734 Safefree (coro);
1282 }
1283 1735
1284 return 0; 1736 return 0;
1285} 1737}
1286 1738
1287static int 1739static int ecb_cold
1288coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1740coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1289{ 1741{
1290 struct coro *coro = (struct coro *)mg->mg_ptr; 1742 /* called when perl clones the current process the slow way (windows process emulation) */
1291 1743 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1292 ++coro->refcnt; 1744 mg->mg_ptr = 0;
1745 mg->mg_virtual = 0;
1293 1746
1294 return 0; 1747 return 0;
1295} 1748}
1296 1749
1297static MGVTBL coro_state_vtbl = { 1750static MGVTBL coro_state_vtbl = {
… …
1304# define MGf_DUP 0 1757# define MGf_DUP 0
1305#endif 1758#endif
1306}; 1759};
1307 1760
1308static void 1761static void
1309prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1762prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1310{ 1763{
1311 ta->prev = SvSTATE (prev_sv); 1764 ta->prev = SvSTATE (prev_sv);
1312 ta->next = SvSTATE (next_sv); 1765 ta->next = SvSTATE (next_sv);
1313 TRANSFER_CHECK (*ta); 1766 TRANSFER_CHECK (*ta);
1314} 1767}
1315 1768
1316static void 1769static void
1317api_transfer (SV *prev_sv, SV *next_sv) 1770api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1771{
1772 struct coro_transfer_args ta;
1773
1774 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1775 TRANSFER (ta, 1);
1776}
1777
1778/** Coro ********************************************************************/
1779
1780ECB_INLINE void
1781coro_enq (pTHX_ struct coro *coro)
1782{
1783 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1784
1785 SvREFCNT_inc_NN (coro->hv);
1786
1787 coro->next_ready = 0;
1788 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1789 ready [1] = coro;
1790}
1791
1792ECB_INLINE struct coro *
1793coro_deq (pTHX)
1794{
1795 int prio;
1796
1797 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1798 {
1799 struct coro **ready = coro_ready [prio];
1800
1801 if (ready [0])
1802 {
1803 struct coro *coro = ready [0];
1804 ready [0] = coro->next_ready;
1805 return coro;
1806 }
1807 }
1808
1809 return 0;
1810}
1811
1812static void
1813invoke_sv_ready_hook_helper (void)
1318{ 1814{
1319 dTHX; 1815 dTHX;
1320 struct transfer_args ta; 1816 dSP;
1321 1817
1322 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1818 ENTER;
1323 TRANSFER (ta); 1819 SAVETMPS;
1324}
1325 1820
1326/** Coro ********************************************************************/ 1821 PUSHMARK (SP);
1822 PUTBACK;
1823 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1327 1824
1328static void 1825 FREETMPS;
1329coro_enq (pTHX_ SV *coro_sv) 1826 LEAVE;
1330{
1331 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1332}
1333
1334static SV *
1335coro_deq (pTHX)
1336{
1337 int prio;
1338
1339 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1340 if (AvFILLp (coro_ready [prio]) >= 0)
1341 return av_shift (coro_ready [prio]);
1342
1343 return 0;
1344} 1827}
1345 1828
1346static int 1829static int
1347api_ready (SV *coro_sv) 1830api_ready (pTHX_ SV *coro_sv)
1348{ 1831{
1349 dTHX;
1350 struct coro *coro;
1351
1352 if (SvROK (coro_sv))
1353 coro_sv = SvRV (coro_sv);
1354
1355 coro = SvSTATE (coro_sv); 1832 struct coro *coro = SvSTATE (coro_sv);
1356 1833
1357 if (coro->flags & CF_READY) 1834 if (coro->flags & CF_READY)
1358 return 0; 1835 return 0;
1359 1836
1360 coro->flags |= CF_READY; 1837 coro->flags |= CF_READY;
1361 1838
1362 LOCK; 1839 coro_enq (aTHX_ coro);
1363 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1840
1364 ++coro_nready; 1841 if (!coro_nready++)
1365 UNLOCK; 1842 if (coroapi.readyhook)
1843 coroapi.readyhook ();
1366 1844
1367 return 1; 1845 return 1;
1368} 1846}
1369 1847
1370static int 1848static int
1371api_is_ready (SV *coro_sv) 1849api_is_ready (pTHX_ SV *coro_sv)
1372{ 1850{
1373 dTHX;
1374 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1851 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1375} 1852}
1376 1853
1377static void 1854/* expects to own a reference to next->hv */
1855ECB_INLINE void
1378prepare_schedule (pTHX_ struct transfer_args *ta) 1856prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1379{ 1857{
1380 SV *prev_sv, *next_sv;
1381
1382 for (;;)
1383 {
1384 LOCK;
1385 next_sv = coro_deq (aTHX);
1386
1387 /* nothing to schedule: call the idle handler */
1388 if (expect_false (!next_sv))
1389 {
1390 dSP;
1391 UNLOCK;
1392
1393 ENTER;
1394 SAVETMPS;
1395
1396 PUSHMARK (SP);
1397 PUTBACK;
1398 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1399
1400 FREETMPS;
1401 LEAVE;
1402 continue;
1403 }
1404
1405 ta->next = SvSTATE (next_sv);
1406
1407 /* cannot transfer to destroyed coros, skip and look for next */
1408 if (expect_false (ta->next->flags & CF_DESTROYED))
1409 {
1410 UNLOCK;
1411 SvREFCNT_dec (next_sv);
1412 /* coro_nready is already taken care of by destroy */
1413 continue;
1414 }
1415
1416 --coro_nready;
1417 UNLOCK;
1418 break;
1419 }
1420
1421 /* free this only after the transfer */
1422 prev_sv = SvRV (coro_current); 1858 SV *prev_sv = SvRV (coro_current);
1859
1423 ta->prev = SvSTATE (prev_sv); 1860 ta->prev = SvSTATE_hv (prev_sv);
1861 ta->next = next;
1862
1424 TRANSFER_CHECK (*ta); 1863 TRANSFER_CHECK (*ta);
1425 assert (ta->next->flags & CF_READY); 1864
1426 ta->next->flags &= ~CF_READY;
1427 SvRV_set (coro_current, next_sv); 1865 SvRV_set (coro_current, (SV *)next->hv);
1428 1866
1429 LOCK;
1430 free_coro_mortal (aTHX); 1867 free_coro_mortal (aTHX);
1431 coro_mortal = prev_sv; 1868 coro_mortal = prev_sv;
1432 UNLOCK;
1433} 1869}
1434 1870
1435static void 1871static void
1872prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1873{
1874 for (;;)
1875 {
1876 struct coro *next = coro_deq (aTHX);
1877
1878 if (ecb_expect_true (next))
1879 {
1880 /* cannot transfer to destroyed coros, skip and look for next */
1881 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1882 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1883 else
1884 {
1885 next->flags &= ~CF_READY;
1886 --coro_nready;
1887
1888 prepare_schedule_to (aTHX_ ta, next);
1889 break;
1890 }
1891 }
1892 else
1893 {
1894 /* nothing to schedule: call the idle handler */
1895 if (SvROK (sv_idle)
1896 && SvOBJECT (SvRV (sv_idle)))
1897 {
1898 if (SvRV (sv_idle) == SvRV (coro_current))
1899 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1900
1901 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1902 api_ready (aTHX_ SvRV (sv_idle));
1903 --coro_nready;
1904 }
1905 else
1906 {
1907 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1908 dSP;
1909
1910 ENTER;
1911 SAVETMPS;
1912
1913 PUSHMARK (SP);
1914 PUTBACK;
1915 call_sv (sv_idle, G_VOID | G_DISCARD);
1916
1917 FREETMPS;
1918 LEAVE;
1919 }
1920 }
1921 }
1922}
1923
1924ECB_INLINE void
1436prepare_cede (pTHX_ struct transfer_args *ta) 1925prepare_cede (pTHX_ struct coro_transfer_args *ta)
1437{ 1926{
1438 api_ready (coro_current); 1927 api_ready (aTHX_ coro_current);
1439 prepare_schedule (aTHX_ ta); 1928 prepare_schedule (aTHX_ ta);
1440} 1929}
1441 1930
1931ECB_INLINE void
1932prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1933{
1934 SV *prev = SvRV (coro_current);
1935
1936 if (coro_nready)
1937 {
1938 prepare_schedule (aTHX_ ta);
1939 api_ready (aTHX_ prev);
1940 }
1941 else
1942 prepare_nop (aTHX_ ta);
1943}
1944
1945static void
1946api_schedule (pTHX)
1947{
1948 struct coro_transfer_args ta;
1949
1950 prepare_schedule (aTHX_ &ta);
1951 TRANSFER (ta, 1);
1952}
1953
1954static void
1955api_schedule_to (pTHX_ SV *coro_sv)
1956{
1957 struct coro_transfer_args ta;
1958 struct coro *next = SvSTATE (coro_sv);
1959
1960 SvREFCNT_inc_NN (coro_sv);
1961 prepare_schedule_to (aTHX_ &ta, next);
1962}
1963
1442static int 1964static int
1443prepare_cede_notself (pTHX_ struct transfer_args *ta) 1965api_cede (pTHX)
1444{ 1966{
1445 if (coro_nready) 1967 struct coro_transfer_args ta;
1446 { 1968
1447 SV *prev = SvRV (coro_current);
1448 prepare_schedule (aTHX_ ta); 1969 prepare_cede (aTHX_ &ta);
1449 api_ready (prev); 1970
1971 if (ecb_expect_true (ta.prev != ta.next))
1972 {
1973 TRANSFER (ta, 1);
1450 return 1; 1974 return 1;
1451 } 1975 }
1452 else 1976 else
1453 return 0; 1977 return 0;
1454} 1978}
1455 1979
1456static void
1457api_schedule (void)
1458{
1459 dTHX;
1460 struct transfer_args ta;
1461
1462 prepare_schedule (aTHX_ &ta);
1463 TRANSFER (ta);
1464}
1465
1466static int 1980static int
1467api_cede (void) 1981api_cede_notself (pTHX)
1468{ 1982{
1469 dTHX; 1983 if (coro_nready)
1984 {
1470 struct transfer_args ta; 1985 struct coro_transfer_args ta;
1471 1986
1472 prepare_cede (aTHX_ &ta); 1987 prepare_cede_notself (aTHX_ &ta);
1473
1474 if (expect_true (ta.prev != ta.next))
1475 {
1476 TRANSFER (ta); 1988 TRANSFER (ta, 1);
1477 return 1; 1989 return 1;
1478 } 1990 }
1479 else 1991 else
1480 return 0; 1992 return 0;
1481} 1993}
1482 1994
1483static int 1995static void
1484api_cede_notself (void)
1485{
1486 dTHX;
1487 struct transfer_args ta;
1488
1489 if (prepare_cede_notself (aTHX_ &ta))
1490 {
1491 TRANSFER (ta);
1492 return 1;
1493 }
1494 else
1495 return 0;
1496}
1497
1498static void
1499api_trace (SV *coro_sv, int flags) 1996api_trace (pTHX_ SV *coro_sv, int flags)
1500{ 1997{
1501 dTHX;
1502 struct coro *coro = SvSTATE (coro_sv); 1998 struct coro *coro = SvSTATE (coro_sv);
1503 1999
2000 if (coro->flags & CF_RUNNING)
2001 croak ("cannot enable tracing on a running coroutine, caught");
2002
1504 if (flags & CC_TRACE) 2003 if (flags & CC_TRACE)
1505 { 2004 {
1506 if (!coro->cctx) 2005 if (!coro->cctx)
1507 coro->cctx = cctx_new (); 2006 coro->cctx = cctx_new_run ();
1508 else if (!(coro->cctx->flags & CC_TRACE)) 2007 else if (!(coro->cctx->flags & CC_TRACE))
1509 croak ("cannot enable tracing on coroutine with custom stack"); 2008 croak ("cannot enable tracing on coroutine with custom stack, caught");
1510 2009
1511 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2010 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1512 } 2011 }
1513 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2012 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1514 { 2013 {
… …
1519 else 2018 else
1520 coro->slot->runops = RUNOPS_DEFAULT; 2019 coro->slot->runops = RUNOPS_DEFAULT;
1521 } 2020 }
1522} 2021}
1523 2022
2023static void
2024coro_push_av (pTHX_ AV *av, I32 gimme_v)
2025{
2026 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2027 {
2028 dSP;
2029
2030 if (gimme_v == G_SCALAR)
2031 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2032 else
2033 {
2034 int i;
2035 EXTEND (SP, AvFILLp (av) + 1);
2036
2037 for (i = 0; i <= AvFILLp (av); ++i)
2038 PUSHs (AvARRAY (av)[i]);
2039 }
2040
2041 PUTBACK;
2042 }
2043}
2044
2045static void
2046coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2047{
2048 if (!coro->on_destroy)
2049 coro->on_destroy = newAV ();
2050
2051 av_push (coro->on_destroy, cb);
2052}
2053
2054static void
2055slf_destroy_join (pTHX_ struct CoroSLF *frame)
2056{
2057 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2058}
2059
2060static int
2061slf_check_join (pTHX_ struct CoroSLF *frame)
2062{
2063 struct coro *coro = (struct coro *)frame->data;
2064
2065 if (!coro->status)
2066 return 1;
2067
2068 frame->destroy = 0;
2069
2070 coro_push_av (aTHX_ coro->status, GIMME_V);
2071
2072 SvREFCNT_dec ((SV *)coro->hv);
2073
2074 return 0;
2075}
2076
2077static void
2078slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2079{
2080 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2081
2082 if (items > 1)
2083 croak ("join called with too many arguments");
2084
2085 if (coro->status)
2086 frame->prepare = prepare_nop;
2087 else
2088 {
2089 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2090 frame->prepare = prepare_schedule;
2091 }
2092
2093 frame->check = slf_check_join;
2094 frame->destroy = slf_destroy_join;
2095 frame->data = (void *)coro;
2096 SvREFCNT_inc (coro->hv);
2097}
2098
2099static void
2100coro_call_on_destroy (pTHX_ struct coro *coro)
2101{
2102 AV *od = coro->on_destroy;
2103
2104 if (!od)
2105 return;
2106
2107 while (AvFILLp (od) >= 0)
2108 {
2109 SV *cb = sv_2mortal (av_pop (od));
2110
2111 /* coro hv's (and only hv's at the moment) are supported as well */
2112 if (SvSTATEhv_p (aTHX_ cb))
2113 api_ready (aTHX_ cb);
2114 else
2115 {
2116 dSP; /* don't disturb outer sp */
2117 PUSHMARK (SP);
2118
2119 if (coro->status)
2120 {
2121 PUTBACK;
2122 coro_push_av (aTHX_ coro->status, G_ARRAY);
2123 SPAGAIN;
2124 }
2125
2126 PUTBACK;
2127 call_sv (cb, G_VOID | G_DISCARD);
2128 }
2129 }
2130}
2131
2132static void
2133coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2134{
2135 AV *av;
2136
2137 if (coro->status)
2138 {
2139 av = coro->status;
2140 av_clear (av);
2141 }
2142 else
2143 av = coro->status = newAV ();
2144
2145 /* items are actually not so common, so optimise for this case */
2146 if (items)
2147 {
2148 int i;
2149
2150 av_extend (av, items - 1);
2151
2152 for (i = 0; i < items; ++i)
2153 av_push (av, SvREFCNT_inc_NN (arg [i]));
2154 }
2155}
2156
2157static void
2158slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2159{
2160 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2161 api_ready (aTHX_ sv_manager);
2162
2163 frame->prepare = prepare_schedule;
2164 frame->check = slf_check_repeat;
2165
2166 /* as a minor optimisation, we could unwind all stacks here */
2167 /* but that puts extra pressure on pp_slf, and is not worth much */
2168 /*coro_unwind_stacks (aTHX);*/
2169}
2170
2171static void
2172slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2173{
2174 HV *coro_hv = (HV *)SvRV (coro_current);
2175
2176 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2177 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2178}
2179
2180static void
2181slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2182{
2183 HV *coro_hv;
2184 struct coro *coro;
2185
2186 if (items <= 0)
2187 croak ("Coro::cancel called without coro object,");
2188
2189 coro = SvSTATE (arg [0]);
2190 coro_hv = coro->hv;
2191
2192 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2193
2194 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2195 {
2196 /* coro currently busy cancelling something, so just notify it */
2197 coro->slf_frame.data = (void *)coro;
2198
2199 frame->prepare = prepare_nop;
2200 frame->check = slf_check_nop;
2201 }
2202 else if (coro_hv == (HV *)SvRV (coro_current))
2203 {
2204 /* cancelling the current coro is allowed, and equals terminate */
2205 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2206 }
2207 else
2208 {
2209 struct coro *self = SvSTATE_current;
2210
2211 /* otherwise we cancel directly, purely for speed reasons
2212 * unfortunately, this requires some magic trickery, as
2213 * somebody else could cancel us, so we have to fight the cancellation.
2214 * this is ugly, and hopefully fully worth the extra speed.
2215 * besides, I can't get the slow-but-safe version working...
2216 */
2217 slf_frame.data = 0;
2218 self->flags |= CF_NOCANCEL;
2219 coro_state_destroy (aTHX_ coro);
2220 self->flags &= ~CF_NOCANCEL;
2221
2222 if (slf_frame.data)
2223 {
2224 /* while we were busy we have been cancelled, so terminate */
2225 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2226 }
2227 else
2228 {
2229 frame->prepare = prepare_nop;
2230 frame->check = slf_check_nop;
2231 }
2232 }
2233}
2234
2235static int
2236slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2237{
2238 frame->prepare = 0;
2239 coro_unwind_stacks (aTHX);
2240
2241 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2242
2243 return 1;
2244}
2245
2246static int
2247safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2248{
2249 if (coro->cctx)
2250 croak ("coro inside C callback, unable to cancel at this time, caught");
2251
2252 if (coro->flags & CF_NEW)
2253 {
2254 coro_set_status (aTHX_ coro, arg, items);
2255 coro_state_destroy (aTHX_ coro);
2256 }
2257 else
2258 {
2259 if (!coro->slf_frame.prepare)
2260 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2261
2262 slf_destroy (aTHX_ coro);
2263
2264 coro_set_status (aTHX_ coro, arg, items);
2265 coro->slf_frame.prepare = prepare_nop;
2266 coro->slf_frame.check = slf_check_safe_cancel;
2267
2268 api_ready (aTHX_ (SV *)coro->hv);
2269 }
2270
2271 return 1;
2272}
2273
2274/*****************************************************************************/
2275/* async pool handler */
2276
2277static int
2278slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2279{
2280 HV *hv = (HV *)SvRV (coro_current);
2281 struct coro *coro = (struct coro *)frame->data;
2282
2283 if (!coro->invoke_cb)
2284 return 1; /* loop till we have invoke */
2285 else
2286 {
2287 hv_store (hv, "desc", sizeof ("desc") - 1,
2288 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2289
2290 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2291
2292 {
2293 dSP;
2294 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2295 PUTBACK;
2296 }
2297
2298 SvREFCNT_dec (GvAV (PL_defgv));
2299 GvAV (PL_defgv) = coro->invoke_av;
2300 coro->invoke_av = 0;
2301
2302 return 0;
2303 }
2304}
2305
2306static void
2307slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2308{
2309 HV *hv = (HV *)SvRV (coro_current);
2310 struct coro *coro = SvSTATE_hv ((SV *)hv);
2311
2312 if (ecb_expect_true (coro->saved_deffh))
2313 {
2314 /* subsequent iteration */
2315 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2316 coro->saved_deffh = 0;
2317
2318 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2319 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2320 {
2321 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2322 return;
2323 }
2324 else
2325 {
2326 av_clear (GvAV (PL_defgv));
2327 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2328
2329 coro->prio = 0;
2330
2331 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2332 api_trace (aTHX_ coro_current, 0);
2333
2334 frame->prepare = prepare_schedule;
2335 av_push (av_async_pool, SvREFCNT_inc (hv));
2336 }
2337 }
2338 else
2339 {
2340 /* first iteration, simply fall through */
2341 frame->prepare = prepare_nop;
2342 }
2343
2344 frame->check = slf_check_pool_handler;
2345 frame->data = (void *)coro;
2346}
2347
2348/*****************************************************************************/
2349/* rouse callback */
2350
2351#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2352
2353static void
2354coro_rouse_callback (pTHX_ CV *cv)
2355{
2356 dXSARGS;
2357 SV *data = (SV *)S_GENSUB_ARG;
2358
2359 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2360 {
2361 /* first call, set args */
2362 SV *coro = SvRV (data);
2363 AV *av = newAV ();
2364
2365 SvRV_set (data, (SV *)av);
2366
2367 /* better take a full copy of the arguments */
2368 while (items--)
2369 av_store (av, items, newSVsv (ST (items)));
2370
2371 api_ready (aTHX_ coro);
2372 SvREFCNT_dec (coro);
2373 }
2374
2375 XSRETURN_EMPTY;
2376}
2377
2378static int
2379slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2380{
2381 SV *data = (SV *)frame->data;
2382
2383 if (CORO_THROW)
2384 return 0;
2385
2386 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2387 return 1;
2388
2389 /* now push all results on the stack */
2390 {
2391 dSP;
2392 AV *av = (AV *)SvRV (data);
2393 int i;
2394
2395 EXTEND (SP, AvFILLp (av) + 1);
2396 for (i = 0; i <= AvFILLp (av); ++i)
2397 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2398
2399 /* we have stolen the elements, so set length to zero and free */
2400 AvFILLp (av) = -1;
2401 av_undef (av);
2402
2403 PUTBACK;
2404 }
2405
2406 return 0;
2407}
2408
2409static void
2410slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2411{
2412 SV *cb;
2413
2414 if (items)
2415 cb = arg [0];
2416 else
2417 {
2418 struct coro *coro = SvSTATE_current;
2419
2420 if (!coro->rouse_cb)
2421 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2422
2423 cb = sv_2mortal (coro->rouse_cb);
2424 coro->rouse_cb = 0;
2425 }
2426
2427 if (!SvROK (cb)
2428 || SvTYPE (SvRV (cb)) != SVt_PVCV
2429 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2430 croak ("Coro::rouse_wait called with illegal callback argument,");
2431
2432 {
2433 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2434 SV *data = (SV *)S_GENSUB_ARG;
2435
2436 frame->data = (void *)data;
2437 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2438 frame->check = slf_check_rouse_wait;
2439 }
2440}
2441
2442static SV *
2443coro_new_rouse_cb (pTHX)
2444{
2445 HV *hv = (HV *)SvRV (coro_current);
2446 struct coro *coro = SvSTATE_hv (hv);
2447 SV *data = newRV_inc ((SV *)hv);
2448 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2449
2450 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2451 SvREFCNT_dec (data); /* magicext increases the refcount */
2452
2453 SvREFCNT_dec (coro->rouse_cb);
2454 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2455
2456 return cb;
2457}
2458
2459/*****************************************************************************/
2460/* schedule-like-function opcode (SLF) */
2461
2462static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2463static const CV *slf_cv;
2464static SV **slf_argv;
2465static int slf_argc, slf_arga; /* count, allocated */
2466static I32 slf_ax; /* top of stack, for restore */
2467
2468/* this restores the stack in the case we patched the entersub, to */
2469/* recreate the stack frame as perl will on following calls */
2470/* since entersub cleared the stack */
2471static OP *
2472pp_restore (pTHX)
2473{
2474 int i;
2475 SV **SP = PL_stack_base + slf_ax;
2476
2477 PUSHMARK (SP);
2478
2479 EXTEND (SP, slf_argc + 1);
2480
2481 for (i = 0; i < slf_argc; ++i)
2482 PUSHs (sv_2mortal (slf_argv [i]));
2483
2484 PUSHs ((SV *)CvGV (slf_cv));
2485
2486 RETURNOP (slf_restore.op_first);
2487}
2488
2489static void
2490slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2491{
2492 SV **arg = (SV **)slf_frame.data;
2493
2494 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2495}
2496
2497static void
2498slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2499{
2500 if (items != 2)
2501 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2502
2503 frame->prepare = slf_prepare_transfer;
2504 frame->check = slf_check_nop;
2505 frame->data = (void *)arg; /* let's hope it will stay valid */
2506}
2507
2508static void
2509slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2510{
2511 frame->prepare = prepare_schedule;
2512 frame->check = slf_check_nop;
2513}
2514
2515static void
2516slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2517{
2518 struct coro *next = (struct coro *)slf_frame.data;
2519
2520 SvREFCNT_inc_NN (next->hv);
2521 prepare_schedule_to (aTHX_ ta, next);
2522}
2523
2524static void
2525slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2526{
2527 if (!items)
2528 croak ("Coro::schedule_to expects a coroutine argument, caught");
2529
2530 frame->data = (void *)SvSTATE (arg [0]);
2531 frame->prepare = slf_prepare_schedule_to;
2532 frame->check = slf_check_nop;
2533}
2534
2535static void
2536slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2537{
2538 api_ready (aTHX_ SvRV (coro_current));
2539
2540 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2541}
2542
2543static void
2544slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2545{
2546 frame->prepare = prepare_cede;
2547 frame->check = slf_check_nop;
2548}
2549
2550static void
2551slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2552{
2553 frame->prepare = prepare_cede_notself;
2554 frame->check = slf_check_nop;
2555}
2556
2557/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2558static void
2559slf_destroy (pTHX_ struct coro *coro)
2560{
2561 /* this callback is reserved for slf functions needing to do cleanup */
2562 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2563 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2564
2565 /*
2566 * The on_destroy above most likely is from an SLF call.
2567 * Since by definition the SLF call will not finish when we destroy
2568 * the coro, we will have to force-finish it here, otherwise
2569 * cleanup functions cannot call SLF functions.
2570 */
2571 coro->slf_frame.prepare = 0;
2572}
2573
2574/*
2575 * these not obviously related functions are all rolled into one
2576 * function to increase chances that they all will call transfer with the same
2577 * stack offset
2578 * SLF stands for "schedule-like-function".
2579 */
2580static OP *
2581pp_slf (pTHX)
2582{
2583 I32 checkmark; /* mark SP to see how many elements check has pushed */
2584
2585 /* set up the slf frame, unless it has already been set-up */
2586 /* the latter happens when a new coro has been started */
2587 /* or when a new cctx was attached to an existing coroutine */
2588 if (ecb_expect_true (!slf_frame.prepare))
2589 {
2590 /* first iteration */
2591 dSP;
2592 SV **arg = PL_stack_base + TOPMARK + 1;
2593 int items = SP - arg; /* args without function object */
2594 SV *gv = *sp;
2595
2596 /* do a quick consistency check on the "function" object, and if it isn't */
2597 /* for us, divert to the real entersub */
2598 if (SvTYPE (gv) != SVt_PVGV
2599 || !GvCV (gv)
2600 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2601 return PL_ppaddr[OP_ENTERSUB](aTHX);
2602
2603 if (!(PL_op->op_flags & OPf_STACKED))
2604 {
2605 /* ampersand-form of call, use @_ instead of stack */
2606 AV *av = GvAV (PL_defgv);
2607 arg = AvARRAY (av);
2608 items = AvFILLp (av) + 1;
2609 }
2610
2611 /* now call the init function, which needs to set up slf_frame */
2612 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2613 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2614
2615 /* pop args */
2616 SP = PL_stack_base + POPMARK;
2617
2618 PUTBACK;
2619 }
2620
2621 /* now that we have a slf_frame, interpret it! */
2622 /* we use a callback system not to make the code needlessly */
2623 /* complicated, but so we can run multiple perl coros from one cctx */
2624
2625 do
2626 {
2627 struct coro_transfer_args ta;
2628
2629 slf_frame.prepare (aTHX_ &ta);
2630 TRANSFER (ta, 0);
2631
2632 checkmark = PL_stack_sp - PL_stack_base;
2633 }
2634 while (slf_frame.check (aTHX_ &slf_frame));
2635
2636 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2637
2638 /* exception handling */
2639 if (ecb_expect_false (CORO_THROW))
2640 {
2641 SV *exception = sv_2mortal (CORO_THROW);
2642
2643 CORO_THROW = 0;
2644 sv_setsv (ERRSV, exception);
2645 croak (0);
2646 }
2647
2648 /* return value handling - mostly like entersub */
2649 /* make sure we put something on the stack in scalar context */
2650 if (GIMME_V == G_SCALAR
2651 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2652 {
2653 dSP;
2654 SV **bot = PL_stack_base + checkmark;
2655
2656 if (sp == bot) /* too few, push undef */
2657 bot [1] = &PL_sv_undef;
2658 else /* too many, take last one */
2659 bot [1] = *sp;
2660
2661 SP = bot + 1;
2662
2663 PUTBACK;
2664 }
2665
2666 return NORMAL;
2667}
2668
2669static void
2670api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2671{
2672 int i;
2673 SV **arg = PL_stack_base + ax;
2674 int items = PL_stack_sp - arg + 1;
2675
2676 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2677
2678 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2679 && PL_op->op_ppaddr != pp_slf)
2680 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2681
2682 CvFLAGS (cv) |= CVf_SLF;
2683 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2684 slf_cv = cv;
2685
2686 /* we patch the op, and then re-run the whole call */
2687 /* we have to put the same argument on the stack for this to work */
2688 /* and this will be done by pp_restore */
2689 slf_restore.op_next = (OP *)&slf_restore;
2690 slf_restore.op_type = OP_CUSTOM;
2691 slf_restore.op_ppaddr = pp_restore;
2692 slf_restore.op_first = PL_op;
2693
2694 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2695
2696 if (PL_op->op_flags & OPf_STACKED)
2697 {
2698 if (items > slf_arga)
2699 {
2700 slf_arga = items;
2701 Safefree (slf_argv);
2702 New (0, slf_argv, slf_arga, SV *);
2703 }
2704
2705 slf_argc = items;
2706
2707 for (i = 0; i < items; ++i)
2708 slf_argv [i] = SvREFCNT_inc (arg [i]);
2709 }
2710 else
2711 slf_argc = 0;
2712
2713 PL_op->op_ppaddr = pp_slf;
2714 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2715
2716 PL_op = (OP *)&slf_restore;
2717}
2718
2719/*****************************************************************************/
2720/* dynamic wind */
2721
2722static void
2723on_enterleave_call (pTHX_ SV *cb)
2724{
2725 dSP;
2726
2727 PUSHSTACK;
2728
2729 PUSHMARK (SP);
2730 PUTBACK;
2731 call_sv (cb, G_VOID | G_DISCARD);
2732 SPAGAIN;
2733
2734 POPSTACK;
2735}
2736
2737static SV *
2738coro_avp_pop_and_free (pTHX_ AV **avp)
2739{
2740 AV *av = *avp;
2741 SV *res = av_pop (av);
2742
2743 if (AvFILLp (av) < 0)
2744 {
2745 *avp = 0;
2746 SvREFCNT_dec (av);
2747 }
2748
2749 return res;
2750}
2751
2752static void
2753coro_pop_on_enter (pTHX_ void *coro)
2754{
2755 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2756 SvREFCNT_dec (cb);
2757}
2758
2759static void
2760coro_pop_on_leave (pTHX_ void *coro)
2761{
2762 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2763 on_enterleave_call (aTHX_ sv_2mortal (cb));
2764}
2765
2766/*****************************************************************************/
2767/* PerlIO::cede */
2768
2769typedef struct
2770{
2771 PerlIOBuf base;
2772 NV next, every;
2773} PerlIOCede;
2774
2775static IV ecb_cold
2776PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2777{
2778 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2779
2780 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2781 self->next = nvtime () + self->every;
2782
2783 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2784}
2785
2786static SV * ecb_cold
2787PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2788{
2789 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2790
2791 return newSVnv (self->every);
2792}
2793
2794static IV
2795PerlIOCede_flush (pTHX_ PerlIO *f)
2796{
2797 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2798 double now = nvtime ();
2799
2800 if (now >= self->next)
2801 {
2802 api_cede (aTHX);
2803 self->next = now + self->every;
2804 }
2805
2806 return PerlIOBuf_flush (aTHX_ f);
2807}
2808
2809static PerlIO_funcs PerlIO_cede =
2810{
2811 sizeof(PerlIO_funcs),
2812 "cede",
2813 sizeof(PerlIOCede),
2814 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2815 PerlIOCede_pushed,
2816 PerlIOBuf_popped,
2817 PerlIOBuf_open,
2818 PerlIOBase_binmode,
2819 PerlIOCede_getarg,
2820 PerlIOBase_fileno,
2821 PerlIOBuf_dup,
2822 PerlIOBuf_read,
2823 PerlIOBuf_unread,
2824 PerlIOBuf_write,
2825 PerlIOBuf_seek,
2826 PerlIOBuf_tell,
2827 PerlIOBuf_close,
2828 PerlIOCede_flush,
2829 PerlIOBuf_fill,
2830 PerlIOBase_eof,
2831 PerlIOBase_error,
2832 PerlIOBase_clearerr,
2833 PerlIOBase_setlinebuf,
2834 PerlIOBuf_get_base,
2835 PerlIOBuf_bufsiz,
2836 PerlIOBuf_get_ptr,
2837 PerlIOBuf_get_cnt,
2838 PerlIOBuf_set_ptrcnt,
2839};
2840
2841/*****************************************************************************/
2842/* Coro::Semaphore & Coro::Signal */
2843
2844static SV *
2845coro_waitarray_new (pTHX_ int count)
2846{
2847 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2848 AV *av = newAV ();
2849 SV **ary;
2850
2851 /* unfortunately, building manually saves memory */
2852 Newx (ary, 2, SV *);
2853 AvALLOC (av) = ary;
2854#if PERL_VERSION_ATLEAST (5,10,0)
2855 AvARRAY (av) = ary;
2856#else
2857 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2858 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2859 SvPVX ((SV *)av) = (char *)ary;
2860#endif
2861 AvMAX (av) = 1;
2862 AvFILLp (av) = 0;
2863 ary [0] = newSViv (count);
2864
2865 return newRV_noinc ((SV *)av);
2866}
2867
2868/* semaphore */
2869
2870static void
2871coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2872{
2873 SV *count_sv = AvARRAY (av)[0];
2874 IV count = SvIVX (count_sv);
2875
2876 count += adjust;
2877 SvIVX (count_sv) = count;
2878
2879 /* now wake up as many waiters as are expected to lock */
2880 while (count > 0 && AvFILLp (av) > 0)
2881 {
2882 SV *cb;
2883
2884 /* swap first two elements so we can shift a waiter */
2885 AvARRAY (av)[0] = AvARRAY (av)[1];
2886 AvARRAY (av)[1] = count_sv;
2887 cb = av_shift (av);
2888
2889 if (SvOBJECT (cb))
2890 {
2891 api_ready (aTHX_ cb);
2892 --count;
2893 }
2894 else if (SvTYPE (cb) == SVt_PVCV)
2895 {
2896 dSP;
2897 PUSHMARK (SP);
2898 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2899 PUTBACK;
2900 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2901 }
2902
2903 SvREFCNT_dec (cb);
2904 }
2905}
2906
2907static void
2908coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2909{
2910 /* call $sem->adjust (0) to possibly wake up some other waiters */
2911 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2912}
2913
2914static int
2915slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2916{
2917 AV *av = (AV *)frame->data;
2918 SV *count_sv = AvARRAY (av)[0];
2919 SV *coro_hv = SvRV (coro_current);
2920
2921 /* if we are about to throw, don't actually acquire the lock, just throw */
2922 if (CORO_THROW)
2923 return 0;
2924 else if (SvIVX (count_sv) > 0)
2925 {
2926 frame->destroy = 0;
2927
2928 if (acquire)
2929 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2930 else
2931 coro_semaphore_adjust (aTHX_ av, 0);
2932
2933 return 0;
2934 }
2935 else
2936 {
2937 int i;
2938 /* if we were woken up but can't down, we look through the whole */
2939 /* waiters list and only add us if we aren't in there already */
2940 /* this avoids some degenerate memory usage cases */
2941 for (i = AvFILLp (av); i > 0; --i) // i > 0 is not an off-by-one bug
2942 if (AvARRAY (av)[i] == coro_hv)
2943 return 1;
2944
2945 av_push (av, SvREFCNT_inc (coro_hv));
2946 return 1;
2947 }
2948}
2949
2950static int
2951slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2952{
2953 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2954}
2955
2956static int
2957slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2958{
2959 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2960}
2961
2962static void
2963slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2964{
2965 AV *av = (AV *)SvRV (arg [0]);
2966
2967 if (SvIVX (AvARRAY (av)[0]) > 0)
2968 {
2969 frame->data = (void *)av;
2970 frame->prepare = prepare_nop;
2971 }
2972 else
2973 {
2974 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2975
2976 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2977 frame->prepare = prepare_schedule;
2978 /* to avoid race conditions when a woken-up coro gets terminated */
2979 /* we arrange for a temporary on_destroy that calls adjust (0) */
2980 frame->destroy = coro_semaphore_destroy;
2981 }
2982}
2983
2984static void
2985slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2986{
2987 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2988 frame->check = slf_check_semaphore_down;
2989}
2990
2991static void
2992slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2993{
2994 if (items >= 2)
2995 {
2996 /* callback form */
2997 AV *av = (AV *)SvRV (arg [0]);
2998 SV *cb_cv = s_get_cv_croak (arg [1]);
2999
3000 av_push (av, SvREFCNT_inc_NN (cb_cv));
3001
3002 if (SvIVX (AvARRAY (av)[0]) > 0)
3003 coro_semaphore_adjust (aTHX_ av, 0);
3004
3005 frame->prepare = prepare_nop;
3006 frame->check = slf_check_nop;
3007 }
3008 else
3009 {
3010 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3011 frame->check = slf_check_semaphore_wait;
3012 }
3013}
3014
3015/* signal */
3016
3017static void
3018coro_signal_wake (pTHX_ AV *av, int count)
3019{
3020 SvIVX (AvARRAY (av)[0]) = 0;
3021
3022 /* now signal count waiters */
3023 while (count > 0 && AvFILLp (av) > 0)
3024 {
3025 SV *cb;
3026
3027 /* swap first two elements so we can shift a waiter */
3028 cb = AvARRAY (av)[0];
3029 AvARRAY (av)[0] = AvARRAY (av)[1];
3030 AvARRAY (av)[1] = cb;
3031
3032 cb = av_shift (av);
3033
3034 if (SvTYPE (cb) == SVt_PVCV)
3035 {
3036 dSP;
3037 PUSHMARK (SP);
3038 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3039 PUTBACK;
3040 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3041 }
3042 else
3043 {
3044 api_ready (aTHX_ cb);
3045 sv_setiv (cb, 0); /* signal waiter */
3046 }
3047
3048 SvREFCNT_dec (cb);
3049
3050 --count;
3051 }
3052}
3053
3054static int
3055slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3056{
3057 /* if we are about to throw, also stop waiting */
3058 return SvROK ((SV *)frame->data) && !CORO_THROW;
3059}
3060
3061static void
3062slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3063{
3064 AV *av = (AV *)SvRV (arg [0]);
3065
3066 if (items >= 2)
3067 {
3068 SV *cb_cv = s_get_cv_croak (arg [1]);
3069 av_push (av, SvREFCNT_inc_NN (cb_cv));
3070
3071 if (SvIVX (AvARRAY (av)[0]))
3072 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3073
3074 frame->prepare = prepare_nop;
3075 frame->check = slf_check_nop;
3076 }
3077 else if (SvIVX (AvARRAY (av)[0]))
3078 {
3079 SvIVX (AvARRAY (av)[0]) = 0;
3080 frame->prepare = prepare_nop;
3081 frame->check = slf_check_nop;
3082 }
3083 else
3084 {
3085 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3086
3087 av_push (av, waiter);
3088
3089 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3090 frame->prepare = prepare_schedule;
3091 frame->check = slf_check_signal_wait;
3092 }
3093}
3094
3095/*****************************************************************************/
3096/* Coro::AIO */
3097
3098#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3099
3100/* helper storage struct */
3101struct io_state
3102{
3103 int errorno;
3104 I32 laststype; /* U16 in 5.10.0 */
3105 int laststatval;
3106 Stat_t statcache;
3107};
3108
3109static void
3110coro_aio_callback (pTHX_ CV *cv)
3111{
3112 dXSARGS;
3113 AV *state = (AV *)S_GENSUB_ARG;
3114 SV *coro = av_pop (state);
3115 SV *data_sv = newSV (sizeof (struct io_state));
3116
3117 av_extend (state, items - 1);
3118
3119 sv_upgrade (data_sv, SVt_PV);
3120 SvCUR_set (data_sv, sizeof (struct io_state));
3121 SvPOK_only (data_sv);
3122
3123 {
3124 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3125
3126 data->errorno = errno;
3127 data->laststype = PL_laststype;
3128 data->laststatval = PL_laststatval;
3129 data->statcache = PL_statcache;
3130 }
3131
3132 /* now build the result vector out of all the parameters and the data_sv */
3133 {
3134 int i;
3135
3136 for (i = 0; i < items; ++i)
3137 av_push (state, SvREFCNT_inc_NN (ST (i)));
3138 }
3139
3140 av_push (state, data_sv);
3141
3142 api_ready (aTHX_ coro);
3143 SvREFCNT_dec (coro);
3144 SvREFCNT_dec ((AV *)state);
3145}
3146
3147static int
3148slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3149{
3150 AV *state = (AV *)frame->data;
3151
3152 /* if we are about to throw, return early */
3153 /* this does not cancel the aio request, but at least */
3154 /* it quickly returns */
3155 if (CORO_THROW)
3156 return 0;
3157
3158 /* one element that is an RV? repeat! */
3159 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3160 return 1;
3161
3162 /* restore status */
3163 {
3164 SV *data_sv = av_pop (state);
3165 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3166
3167 errno = data->errorno;
3168 PL_laststype = data->laststype;
3169 PL_laststatval = data->laststatval;
3170 PL_statcache = data->statcache;
3171
3172 SvREFCNT_dec (data_sv);
3173 }
3174
3175 /* push result values */
3176 {
3177 dSP;
3178 int i;
3179
3180 EXTEND (SP, AvFILLp (state) + 1);
3181 for (i = 0; i <= AvFILLp (state); ++i)
3182 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3183
3184 PUTBACK;
3185 }
3186
3187 return 0;
3188}
3189
3190static void
3191slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3192{
3193 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3194 SV *coro_hv = SvRV (coro_current);
3195 struct coro *coro = SvSTATE_hv (coro_hv);
3196
3197 /* put our coroutine id on the state arg */
3198 av_push (state, SvREFCNT_inc_NN (coro_hv));
3199
3200 /* first see whether we have a non-zero priority and set it as AIO prio */
3201 if (coro->prio)
3202 {
3203 dSP;
3204
3205 static SV *prio_cv;
3206 static SV *prio_sv;
3207
3208 if (ecb_expect_false (!prio_cv))
3209 {
3210 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3211 prio_sv = newSViv (0);
3212 }
3213
3214 PUSHMARK (SP);
3215 sv_setiv (prio_sv, coro->prio);
3216 XPUSHs (prio_sv);
3217
3218 PUTBACK;
3219 call_sv (prio_cv, G_VOID | G_DISCARD);
3220 }
3221
3222 /* now call the original request */
3223 {
3224 dSP;
3225 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3226 int i;
3227
3228 PUSHMARK (SP);
3229
3230 /* first push all args to the stack */
3231 EXTEND (SP, items + 1);
3232
3233 for (i = 0; i < items; ++i)
3234 PUSHs (arg [i]);
3235
3236 /* now push the callback closure */
3237 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3238
3239 /* now call the AIO function - we assume our request is uncancelable */
3240 PUTBACK;
3241 call_sv ((SV *)req, G_VOID | G_DISCARD);
3242 }
3243
3244 /* now that the request is going, we loop till we have a result */
3245 frame->data = (void *)state;
3246 frame->prepare = prepare_schedule;
3247 frame->check = slf_check_aio_req;
3248}
3249
3250static void
3251coro_aio_req_xs (pTHX_ CV *cv)
3252{
3253 dXSARGS;
3254
3255 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3256
3257 XSRETURN_EMPTY;
3258}
3259
3260/*****************************************************************************/
3261
3262#if CORO_CLONE
3263# include "clone.c"
3264#endif
3265
3266/*****************************************************************************/
3267
3268static SV *
3269coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3270{
3271 SV *coro_sv;
3272 struct coro *coro;
3273 MAGIC *mg;
3274 HV *hv;
3275 SV *cb;
3276 int i;
3277
3278 if (argc > 0)
3279 {
3280 cb = s_get_cv_croak (argv [0]);
3281
3282 if (!is_coro)
3283 {
3284 if (CvISXSUB (cb))
3285 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3286
3287 if (!CvROOT (cb))
3288 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3289 }
3290 }
3291
3292 Newz (0, coro, 1, struct coro);
3293 coro->args = newAV ();
3294 coro->flags = CF_NEW;
3295
3296 if (coro_first) coro_first->prev = coro;
3297 coro->next = coro_first;
3298 coro_first = coro;
3299
3300 coro->hv = hv = newHV ();
3301 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3302 mg->mg_flags |= MGf_DUP;
3303 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3304
3305 if (argc > 0)
3306 {
3307 av_extend (coro->args, argc + is_coro - 1);
3308
3309 if (is_coro)
3310 {
3311 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3312 cb = (SV *)cv_coro_run;
3313 }
3314
3315 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3316
3317 for (i = 1; i < argc; i++)
3318 av_push (coro->args, newSVsv (argv [i]));
3319 }
3320
3321 return coro_sv;
3322}
3323
3324#ifndef __cplusplus
3325ecb_cold XS(boot_Coro__State);
3326#endif
3327
1524MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3328MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1525 3329
1526PROTOTYPES: DISABLE 3330PROTOTYPES: DISABLE
1527 3331
1528BOOT: 3332BOOT:
1529{ 3333{
1530#ifdef USE_ITHREADS 3334#ifdef USE_ITHREADS
1531 MUTEX_INIT (&coro_mutex); 3335# if CORO_PTHREAD
3336 coro_thx = PERL_GET_CONTEXT;
3337# endif
1532#endif 3338#endif
1533 BOOT_PAGESIZE; 3339 BOOT_PAGESIZE;
1534 3340
3341 cctx_current = cctx_new_empty ();
3342
1535 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3343 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1536 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3344 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1537#if 0 3345
1538 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 3346 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1539 PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3347 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1540#endif 3348 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3349
1541 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 3350 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1542 rv_diehook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 3351 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1543 rv_warnhook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 3352 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1544 3353
1545 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3354 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1546 3355
1547 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3356 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1548 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3357 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1553 main_top_env = PL_top_env; 3362 main_top_env = PL_top_env;
1554 3363
1555 while (main_top_env->je_prev) 3364 while (main_top_env->je_prev)
1556 main_top_env = main_top_env->je_prev; 3365 main_top_env = main_top_env->je_prev;
1557 3366
3367 {
3368 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3369
3370 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3371 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3372
3373 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3374 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3375 }
3376
1558 coroapi.ver = CORO_API_VERSION; 3377 coroapi.ver = CORO_API_VERSION;
1559 coroapi.rev = CORO_API_REVISION; 3378 coroapi.rev = CORO_API_REVISION;
3379
1560 coroapi.transfer = api_transfer; 3380 coroapi.transfer = api_transfer;
1561 3381
3382 coroapi.sv_state = SvSTATE_;
3383 coroapi.execute_slf = api_execute_slf;
3384 coroapi.prepare_nop = prepare_nop;
3385 coroapi.prepare_schedule = prepare_schedule;
3386 coroapi.prepare_cede = prepare_cede;
3387 coroapi.prepare_cede_notself = prepare_cede_notself;
3388
3389 time_init (aTHX);
3390
1562 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3391 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1563} 3392}
1564 3393
1565SV * 3394SV *
1566new (char *klass, ...) 3395new (SV *klass, ...)
3396 ALIAS:
3397 Coro::new = 1
1567 CODE: 3398 CODE:
1568{ 3399 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1569 struct coro *coro;
1570 MAGIC *mg;
1571 HV *hv;
1572 int i;
1573
1574 Newz (0, coro, 1, struct coro);
1575 coro->args = newAV ();
1576 coro->flags = CF_NEW;
1577
1578 if (coro_first) coro_first->prev = coro;
1579 coro->next = coro_first;
1580 coro_first = coro;
1581
1582 coro->hv = hv = newHV ();
1583 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1584 mg->mg_flags |= MGf_DUP;
1585 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1586
1587 av_extend (coro->args, items - 1);
1588 for (i = 1; i < items; i++)
1589 av_push (coro->args, newSVsv (ST (i)));
1590}
1591 OUTPUT:
1592 RETVAL
1593
1594# these not obviously related functions are all rolled into the same xs
1595# function to increase chances that they all will call transfer with the same
1596# stack offset
1597void
1598_set_stacklevel (...)
1599 ALIAS:
1600 Coro::State::transfer = 1
1601 Coro::schedule = 2
1602 Coro::cede = 3
1603 Coro::cede_notself = 4
1604 CODE:
1605{
1606 struct transfer_args ta;
1607
1608 switch (ix)
1609 {
1610 case 0:
1611 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1612 ta.next = 0;
1613 break;
1614
1615 case 1:
1616 if (items != 2)
1617 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1618
1619 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1620 break;
1621
1622 case 2:
1623 prepare_schedule (aTHX_ &ta);
1624 break;
1625
1626 case 3:
1627 prepare_cede (aTHX_ &ta);
1628 break;
1629
1630 case 4:
1631 if (!prepare_cede_notself (aTHX_ &ta))
1632 XSRETURN_EMPTY;
1633
1634 break;
1635 }
1636
1637 BARRIER;
1638 PUTBACK;
1639 TRANSFER (ta);
1640 SPAGAIN; /* might be the sp of a different coroutine now */
1641 /* be extra careful not to ever do anything after TRANSFER */
1642}
1643
1644bool
1645_destroy (SV *coro_sv)
1646 CODE:
1647 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1648 OUTPUT: 3400 OUTPUT:
1649 RETVAL 3401 RETVAL
1650 3402
1651void 3403void
3404transfer (...)
3405 PROTOTYPE: $$
3406 CODE:
3407 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3408
3409void
1652_exit (code) 3410_exit (int code)
1653 int code
1654 PROTOTYPE: $ 3411 PROTOTYPE: $
1655 CODE: 3412 CODE:
1656 _exit (code); 3413 _exit (code);
1657 3414
3415SV *
3416clone (Coro::State coro)
3417 CODE:
3418{
3419#if CORO_CLONE
3420 struct coro *ncoro = coro_clone (aTHX_ coro);
3421 MAGIC *mg;
3422 /* TODO: too much duplication */
3423 ncoro->hv = newHV ();
3424 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3425 mg->mg_flags |= MGf_DUP;
3426 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3427#else
3428 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3429#endif
3430}
3431 OUTPUT:
3432 RETVAL
3433
1658int 3434int
1659cctx_stacksize (int new_stacksize = 0) 3435cctx_stacksize (int new_stacksize = 0)
3436 PROTOTYPE: ;$
1660 CODE: 3437 CODE:
1661 RETVAL = coro_stacksize; 3438 RETVAL = cctx_stacksize;
1662 if (new_stacksize) 3439 if (new_stacksize)
3440 {
1663 coro_stacksize = new_stacksize; 3441 cctx_stacksize = new_stacksize;
3442 ++cctx_gen;
3443 }
1664 OUTPUT: 3444 OUTPUT:
1665 RETVAL 3445 RETVAL
1666 3446
1667int 3447int
3448cctx_max_idle (int max_idle = 0)
3449 PROTOTYPE: ;$
3450 CODE:
3451 RETVAL = cctx_max_idle;
3452 if (max_idle > 1)
3453 cctx_max_idle = max_idle;
3454 OUTPUT:
3455 RETVAL
3456
3457int
1668cctx_count () 3458cctx_count ()
3459 PROTOTYPE:
1669 CODE: 3460 CODE:
1670 RETVAL = cctx_count; 3461 RETVAL = cctx_count;
1671 OUTPUT: 3462 OUTPUT:
1672 RETVAL 3463 RETVAL
1673 3464
1674int 3465int
1675cctx_idle () 3466cctx_idle ()
3467 PROTOTYPE:
1676 CODE: 3468 CODE:
1677 RETVAL = cctx_idle; 3469 RETVAL = cctx_idle;
1678 OUTPUT: 3470 OUTPUT:
1679 RETVAL 3471 RETVAL
1680 3472
1681void 3473void
1682list () 3474list ()
3475 PROTOTYPE:
1683 PPCODE: 3476 PPCODE:
1684{ 3477{
1685 struct coro *coro; 3478 struct coro *coro;
1686 for (coro = coro_first; coro; coro = coro->next) 3479 for (coro = coro_first; coro; coro = coro->next)
1687 if (coro->hv) 3480 if (coro->hv)
… …
1692call (Coro::State coro, SV *coderef) 3485call (Coro::State coro, SV *coderef)
1693 ALIAS: 3486 ALIAS:
1694 eval = 1 3487 eval = 1
1695 CODE: 3488 CODE:
1696{ 3489{
1697 if (coro->mainstack) 3490 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1698 { 3491 {
1699 struct coro temp; 3492 struct coro *current = SvSTATE_current;
3493 struct CoroSLF slf_save;
1700 3494
1701 if (!(coro->flags & CF_RUNNING)) 3495 if (current != coro)
1702 { 3496 {
3497 PUTBACK;
1703 save_perl (aTHX_ &temp); 3498 save_perl (aTHX_ current);
1704 load_perl (aTHX_ coro); 3499 load_perl (aTHX_ coro);
3500 /* the coro is most likely in an active SLF call.
3501 * while not strictly required (the code we execute is
3502 * not allowed to call any SLF functions), it's cleaner
3503 * to reinitialise the slf_frame and restore it later.
3504 * This might one day allow us to actually do SLF calls
3505 * from code executed here.
3506 */
3507 slf_save = slf_frame;
3508 slf_frame.prepare = 0;
3509 SPAGAIN;
1705 } 3510 }
1706 3511
1707 {
1708 dSP;
1709 ENTER;
1710 SAVETMPS;
1711 PUTBACK;
1712 PUSHSTACK; 3512 PUSHSTACK;
3513
1713 PUSHMARK (SP); 3514 PUSHMARK (SP);
3515 PUTBACK;
1714 3516
1715 if (ix) 3517 if (ix)
1716 eval_sv (coderef, 0); 3518 eval_sv (coderef, 0);
1717 else 3519 else
1718 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3520 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1719 3521
1720 POPSTACK; 3522 POPSTACK;
1721 SPAGAIN; 3523 SPAGAIN;
1722 FREETMPS;
1723 LEAVE;
1724 PUTBACK;
1725 }
1726 3524
1727 if (!(coro->flags & CF_RUNNING)) 3525 if (current != coro)
1728 { 3526 {
3527 PUTBACK;
3528 slf_frame = slf_save;
1729 save_perl (aTHX_ coro); 3529 save_perl (aTHX_ coro);
1730 load_perl (aTHX_ &temp); 3530 load_perl (aTHX_ current);
3531 SPAGAIN;
1731 } 3532 }
1732 } 3533 }
1733} 3534}
1734 3535
1735SV * 3536SV *
… …
1737 PROTOTYPE: $ 3538 PROTOTYPE: $
1738 ALIAS: 3539 ALIAS:
1739 is_ready = CF_READY 3540 is_ready = CF_READY
1740 is_running = CF_RUNNING 3541 is_running = CF_RUNNING
1741 is_new = CF_NEW 3542 is_new = CF_NEW
1742 is_destroyed = CF_DESTROYED 3543 is_destroyed = CF_ZOMBIE
3544 is_zombie = CF_ZOMBIE
3545 is_suspended = CF_SUSPENDED
1743 CODE: 3546 CODE:
1744 RETVAL = boolSV (coro->flags & ix); 3547 RETVAL = boolSV (coro->flags & ix);
1745 OUTPUT: 3548 OUTPUT:
1746 RETVAL 3549 RETVAL
1747 3550
1748void 3551void
3552throw (Coro::State self, SV *exception = &PL_sv_undef)
3553 PROTOTYPE: $;$
3554 CODE:
3555{
3556 struct coro *current = SvSTATE_current;
3557 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3558 SvREFCNT_dec (*exceptionp);
3559 SvGETMAGIC (exception);
3560 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3561}
3562
3563void
1749api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3564api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3565 PROTOTYPE: $;$
3566 C_ARGS: aTHX_ coro, flags
1750 3567
1751SV * 3568SV *
1752has_stack (Coro::State coro) 3569has_cctx (Coro::State coro)
1753 PROTOTYPE: $ 3570 PROTOTYPE: $
1754 CODE: 3571 CODE:
1755 RETVAL = boolSV (!!coro->cctx); 3572 /* maybe manage the running flag differently */
3573 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1756 OUTPUT: 3574 OUTPUT:
1757 RETVAL 3575 RETVAL
1758 3576
1759int 3577int
1760is_traced (Coro::State coro) 3578is_traced (Coro::State coro)
… …
1762 CODE: 3580 CODE:
1763 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3581 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1764 OUTPUT: 3582 OUTPUT:
1765 RETVAL 3583 RETVAL
1766 3584
1767IV 3585UV
1768rss (Coro::State coro) 3586rss (Coro::State coro)
1769 PROTOTYPE: $ 3587 PROTOTYPE: $
1770 ALIAS: 3588 ALIAS:
1771 usecount = 1 3589 usecount = 1
1772 CODE: 3590 CODE:
… …
1776 case 1: RETVAL = coro->usecount; break; 3594 case 1: RETVAL = coro->usecount; break;
1777 } 3595 }
1778 OUTPUT: 3596 OUTPUT:
1779 RETVAL 3597 RETVAL
1780 3598
3599void
3600force_cctx ()
3601 PROTOTYPE:
3602 CODE:
3603 cctx_current->idle_sp = 0;
3604
3605void
3606swap_defsv (Coro::State self)
3607 PROTOTYPE: $
3608 ALIAS:
3609 swap_defav = 1
3610 CODE:
3611 if (!self->slot)
3612 croak ("cannot swap state with coroutine that has no saved state,");
3613 else
3614 {
3615 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3616 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3617
3618 SV *tmp = *src; *src = *dst; *dst = tmp;
3619 }
3620
3621void
3622cancel (Coro::State self)
3623 CODE:
3624 coro_state_destroy (aTHX_ self);
3625
3626SV *
3627enable_times (int enabled = enable_times)
3628 CODE:
3629{
3630 RETVAL = boolSV (enable_times);
3631
3632 if (enabled != enable_times)
3633 {
3634 enable_times = enabled;
3635
3636 coro_times_update ();
3637 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3638 }
3639}
3640 OUTPUT:
3641 RETVAL
3642
3643void
3644times (Coro::State self)
3645 PPCODE:
3646{
3647 struct coro *current = SvSTATE (coro_current);
3648
3649 if (ecb_expect_false (current == self))
3650 {
3651 coro_times_update ();
3652 coro_times_add (SvSTATE (coro_current));
3653 }
3654
3655 EXTEND (SP, 2);
3656 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3657 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3658
3659 if (ecb_expect_false (current == self))
3660 coro_times_sub (SvSTATE (coro_current));
3661}
3662
3663void
3664swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3665 CODE:
3666{
3667 struct coro *current = SvSTATE_current;
3668
3669 if (current == coro)
3670 SWAP_SVS (current);
3671
3672 if (!coro->swap_sv)
3673 coro->swap_sv = newAV ();
3674
3675 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3676 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3677
3678 if (current == coro)
3679 SWAP_SVS (current);
3680}
3681
1781 3682
1782MODULE = Coro::State PACKAGE = Coro 3683MODULE = Coro::State PACKAGE = Coro
1783 3684
1784BOOT: 3685BOOT:
1785{ 3686{
1786 int i;
1787
1788 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3687 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1789 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3688 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3689 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3690 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1790 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 3691 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3692 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3693 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3694 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1791 3695
1792 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3696 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1793 SvREADONLY_on (coro_current); 3697 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
1794 3698 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3699 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3700
1795 coro_stash = gv_stashpv ("Coro", TRUE); 3701 coro_stash = gv_stashpv ("Coro", TRUE);
1796 3702
1797 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3703 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1798 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3704 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1799 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3705 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1800 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3706 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1801 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3707 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1802 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3708 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1803
1804 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1805 coro_ready[i] = newAV ();
1806 3709
1807 { 3710 {
1808 SV *sv = perl_get_sv ("Coro::API", TRUE); 3711 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1809 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1810 3712
1811 coroapi.schedule = api_schedule; 3713 coroapi.schedule = api_schedule;
3714 coroapi.schedule_to = api_schedule_to;
1812 coroapi.cede = api_cede; 3715 coroapi.cede = api_cede;
1813 coroapi.cede_notself = api_cede_notself; 3716 coroapi.cede_notself = api_cede_notself;
1814 coroapi.ready = api_ready; 3717 coroapi.ready = api_ready;
1815 coroapi.is_ready = api_is_ready; 3718 coroapi.is_ready = api_is_ready;
1816 coroapi.nready = &coro_nready; 3719 coroapi.nready = coro_nready;
1817 coroapi.current = coro_current; 3720 coroapi.current = coro_current;
1818 3721
1819 GCoroAPI = &coroapi; 3722 /*GCoroAPI = &coroapi;*/
1820 sv_setiv (sv, (IV)&coroapi); 3723 sv_setiv (sv, (IV)&coroapi);
1821 SvREADONLY_on (sv); 3724 SvREADONLY_on (sv);
1822 } 3725 }
1823} 3726}
3727
3728SV *
3729async (...)
3730 PROTOTYPE: &@
3731 CODE:
3732 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3733 api_ready (aTHX_ RETVAL);
3734 OUTPUT:
3735 RETVAL
3736
3737void
3738_destroy (Coro::State coro)
3739 CODE:
3740 /* used by the manager thread */
3741 coro_state_destroy (aTHX_ coro);
3742
3743void
3744on_destroy (Coro::State coro, SV *cb)
3745 CODE:
3746 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3747
3748void
3749join (...)
3750 CODE:
3751 CORO_EXECUTE_SLF_XS (slf_init_join);
3752
3753void
3754terminate (...)
3755 CODE:
3756 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3757
3758void
3759cancel (...)
3760 CODE:
3761 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3762
3763int
3764safe_cancel (Coro::State self, ...)
3765 C_ARGS: aTHX_ self, &ST (1), items - 1
3766
3767void
3768schedule (...)
3769 CODE:
3770 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3771
3772void
3773schedule_to (...)
3774 CODE:
3775 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3776
3777void
3778cede_to (...)
3779 CODE:
3780 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3781
3782void
3783cede (...)
3784 CODE:
3785 CORO_EXECUTE_SLF_XS (slf_init_cede);
3786
3787void
3788cede_notself (...)
3789 CODE:
3790 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1824 3791
1825void 3792void
1826_set_current (SV *current) 3793_set_current (SV *current)
1827 PROTOTYPE: $ 3794 PROTOTYPE: $
1828 CODE: 3795 CODE:
1829 SvREFCNT_dec (SvRV (coro_current)); 3796 SvREFCNT_dec (SvRV (coro_current));
1830 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3797 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3798
3799void
3800_set_readyhook (SV *hook)
3801 PROTOTYPE: $
3802 CODE:
3803 SvREFCNT_dec (coro_readyhook);
3804 SvGETMAGIC (hook);
3805 if (SvOK (hook))
3806 {
3807 coro_readyhook = newSVsv (hook);
3808 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3809 }
3810 else
3811 {
3812 coro_readyhook = 0;
3813 CORO_READYHOOK = 0;
3814 }
1831 3815
1832int 3816int
1833prio (Coro::State coro, int newprio = 0) 3817prio (Coro::State coro, int newprio = 0)
3818 PROTOTYPE: $;$
1834 ALIAS: 3819 ALIAS:
1835 nice = 1 3820 nice = 1
1836 CODE: 3821 CODE:
1837{ 3822{
1838 RETVAL = coro->prio; 3823 RETVAL = coro->prio;
… …
1840 if (items > 1) 3825 if (items > 1)
1841 { 3826 {
1842 if (ix) 3827 if (ix)
1843 newprio = coro->prio - newprio; 3828 newprio = coro->prio - newprio;
1844 3829
1845 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3830 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1846 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3831 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1847 3832
1848 coro->prio = newprio; 3833 coro->prio = newprio;
1849 } 3834 }
1850} 3835}
1851 OUTPUT: 3836 OUTPUT:
… …
1853 3838
1854SV * 3839SV *
1855ready (SV *self) 3840ready (SV *self)
1856 PROTOTYPE: $ 3841 PROTOTYPE: $
1857 CODE: 3842 CODE:
1858 RETVAL = boolSV (api_ready (self)); 3843 RETVAL = boolSV (api_ready (aTHX_ self));
1859 OUTPUT: 3844 OUTPUT:
1860 RETVAL 3845 RETVAL
1861 3846
1862int 3847int
1863nready (...) 3848nready (...)
… …
1866 RETVAL = coro_nready; 3851 RETVAL = coro_nready;
1867 OUTPUT: 3852 OUTPUT:
1868 RETVAL 3853 RETVAL
1869 3854
1870void 3855void
1871throw (Coro::State self, SV *throw = &PL_sv_undef) 3856suspend (Coro::State self)
1872 PROTOTYPE: $;$ 3857 PROTOTYPE: $
1873 CODE: 3858 CODE:
1874 SvREFCNT_dec (self->throw); 3859 self->flags |= CF_SUSPENDED;
1875 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1876 3860
1877# for async_pool speedup
1878void 3861void
1879_pool_1 (SV *cb) 3862resume (Coro::State self)
3863 PROTOTYPE: $
1880 CODE: 3864 CODE:
1881{ 3865 self->flags &= ~CF_SUSPENDED;
1882 struct coro *coro = SvSTATE (coro_current);
1883 HV *hv = (HV *)SvRV (coro_current);
1884 AV *defav = GvAV (PL_defgv);
1885 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1886 AV *invoke_av;
1887 int i, len;
1888 3866
1889 if (!invoke) 3867void
1890 croak ("\3async_pool terminate\2\n"); 3868_pool_handler (...)
3869 CODE:
3870 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1891 3871
1892 SvREFCNT_dec (coro->saved_deffh); 3872void
1893 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 3873async_pool (SV *cv, ...)
3874 PROTOTYPE: &@
3875 PPCODE:
3876{
3877 HV *hv = (HV *)av_pop (av_async_pool);
3878 AV *av = newAV ();
3879 SV *cb = ST (0);
3880 int i;
1894 3881
1895 hv_store (hv, "desc", sizeof ("desc") - 1, 3882 av_extend (av, items - 2);
1896 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3883 for (i = 1; i < items; ++i)
3884 av_push (av, SvREFCNT_inc_NN (ST (i)));
1897 3885
1898 invoke_av = (AV *)SvRV (invoke); 3886 if ((SV *)hv == &PL_sv_undef)
1899 len = av_len (invoke_av);
1900
1901 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1902
1903 if (len > 0)
1904 { 3887 {
1905 av_fill (defav, len - 1); 3888 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1906 for (i = 0; i < len; ++i) 3889 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1907 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3890 SvREFCNT_dec (sv);
1908 } 3891 }
1909 3892
3893 {
3894 struct coro *coro = SvSTATE_hv (hv);
3895
3896 assert (!coro->invoke_cb);
3897 assert (!coro->invoke_av);
3898 coro->invoke_cb = SvREFCNT_inc (cb);
3899 coro->invoke_av = av;
3900 }
3901
3902 api_ready (aTHX_ (SV *)hv);
3903
3904 if (GIMME_V != G_VOID)
3905 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3906 else
1910 SvREFCNT_dec (invoke); 3907 SvREFCNT_dec (hv);
1911} 3908}
1912 3909
1913void 3910SV *
1914_pool_2 (SV *cb) 3911rouse_cb ()
3912 PROTOTYPE:
1915 CODE: 3913 CODE:
1916{ 3914 RETVAL = coro_new_rouse_cb (aTHX);
1917 struct coro *coro = SvSTATE (coro_current);
1918
1919 sv_setsv (cb, &PL_sv_undef);
1920
1921 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1922 coro->saved_deffh = 0;
1923
1924 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1925 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1926 croak ("\3async_pool terminate\2\n");
1927
1928 av_clear (GvAV (PL_defgv));
1929 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1930 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1931
1932 coro->prio = 0;
1933
1934 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1935 api_trace (coro_current, 0);
1936
1937 av_push (av_async_pool, newSVsv (coro_current));
1938}
1939
1940
1941MODULE = Coro::State PACKAGE = Coro::AIO
1942
1943SV *
1944_get_state ()
1945 CODE:
1946{
1947 struct io_state *data;
1948
1949 RETVAL = newSV (sizeof (struct io_state));
1950 data = (struct io_state *)SvPVX (RETVAL);
1951 SvCUR_set (RETVAL, sizeof (struct io_state));
1952 SvPOK_only (RETVAL);
1953
1954 data->errorno = errno;
1955 data->laststype = PL_laststype;
1956 data->laststatval = PL_laststatval;
1957 data->statcache = PL_statcache;
1958}
1959 OUTPUT: 3915 OUTPUT:
1960 RETVAL 3916 RETVAL
1961 3917
1962void 3918void
1963_set_state (char *data_) 3919rouse_wait (...)
3920 PROTOTYPE: ;$
3921 PPCODE:
3922 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3923
3924void
3925on_enter (SV *block)
3926 ALIAS:
3927 on_leave = 1
1964 PROTOTYPE: $ 3928 PROTOTYPE: &
1965 CODE: 3929 CODE:
1966{ 3930{
1967 struct io_state *data = (void *)data_; 3931 struct coro *coro = SvSTATE_current;
3932 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1968 3933
1969 errno = data->errorno; 3934 block = s_get_cv_croak (block);
1970 PL_laststype = data->laststype;
1971 PL_laststatval = data->laststatval;
1972 PL_statcache = data->statcache;
1973}
1974 3935
3936 if (!*avp)
3937 *avp = newAV ();
3938
3939 av_push (*avp, SvREFCNT_inc (block));
3940
3941 if (!ix)
3942 on_enterleave_call (aTHX_ block);
3943
3944 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3945 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3946 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3947}
3948
3949
3950MODULE = Coro::State PACKAGE = PerlIO::cede
3951
3952BOOT:
3953 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3954
3955
3956MODULE = Coro::State PACKAGE = Coro::Semaphore
3957
3958SV *
3959new (SV *klass, SV *count = 0)
3960 CODE:
3961{
3962 int semcnt = 1;
3963
3964 if (count)
3965 {
3966 SvGETMAGIC (count);
3967
3968 if (SvOK (count))
3969 semcnt = SvIV (count);
3970 }
3971
3972 RETVAL = sv_bless (
3973 coro_waitarray_new (aTHX_ semcnt),
3974 GvSTASH (CvGV (cv))
3975 );
3976}
3977 OUTPUT:
3978 RETVAL
3979
3980# helper for Coro::Channel and others
3981SV *
3982_alloc (int count)
3983 CODE:
3984 RETVAL = coro_waitarray_new (aTHX_ count);
3985 OUTPUT:
3986 RETVAL
3987
3988SV *
3989count (SV *self)
3990 CODE:
3991 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3992 OUTPUT:
3993 RETVAL
3994
3995void
3996up (SV *self, int adjust = 1)
3997 ALIAS:
3998 adjust = 1
3999 CODE:
4000 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4001
4002void
4003down (...)
4004 CODE:
4005 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4006
4007void
4008wait (...)
4009 CODE:
4010 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4011
4012void
4013try (SV *self)
4014 PPCODE:
4015{
4016 AV *av = (AV *)SvRV (self);
4017 SV *count_sv = AvARRAY (av)[0];
4018 IV count = SvIVX (count_sv);
4019
4020 if (count > 0)
4021 {
4022 --count;
4023 SvIVX (count_sv) = count;
4024 XSRETURN_YES;
4025 }
4026 else
4027 XSRETURN_NO;
4028}
4029
4030void
4031waiters (SV *self)
4032 PPCODE:
4033{
4034 AV *av = (AV *)SvRV (self);
4035 int wcount = AvFILLp (av) + 1 - 1;
4036
4037 if (GIMME_V == G_SCALAR)
4038 XPUSHs (sv_2mortal (newSViv (wcount)));
4039 else
4040 {
4041 int i;
4042 EXTEND (SP, wcount);
4043 for (i = 1; i <= wcount; ++i)
4044 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4045 }
4046}
4047
4048MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4049
4050void
4051_may_delete (SV *sem, int count, int extra_refs)
4052 PPCODE:
4053{
4054 AV *av = (AV *)SvRV (sem);
4055
4056 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4057 && AvFILLp (av) == 0 /* no waiters, just count */
4058 && SvIV (AvARRAY (av)[0]) == count)
4059 XSRETURN_YES;
4060
4061 XSRETURN_NO;
4062}
4063
4064MODULE = Coro::State PACKAGE = Coro::Signal
4065
4066SV *
4067new (SV *klass)
4068 CODE:
4069 RETVAL = sv_bless (
4070 coro_waitarray_new (aTHX_ 0),
4071 GvSTASH (CvGV (cv))
4072 );
4073 OUTPUT:
4074 RETVAL
4075
4076void
4077wait (...)
4078 CODE:
4079 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4080
4081void
4082broadcast (SV *self)
4083 CODE:
4084{
4085 AV *av = (AV *)SvRV (self);
4086 coro_signal_wake (aTHX_ av, AvFILLp (av));
4087}
4088
4089void
4090send (SV *self)
4091 CODE:
4092{
4093 AV *av = (AV *)SvRV (self);
4094
4095 if (AvFILLp (av))
4096 coro_signal_wake (aTHX_ av, 1);
4097 else
4098 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4099}
4100
4101IV
4102awaited (SV *self)
4103 CODE:
4104 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4105 OUTPUT:
4106 RETVAL
4107
4108
4109MODULE = Coro::State PACKAGE = Coro::AnyEvent
4110
4111BOOT:
4112 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4113
4114void
4115_schedule (...)
4116 CODE:
4117{
4118 static int incede;
4119
4120 api_cede_notself (aTHX);
4121
4122 ++incede;
4123 while (coro_nready >= incede && api_cede (aTHX))
4124 ;
4125
4126 sv_setsv (sv_activity, &PL_sv_undef);
4127 if (coro_nready >= incede)
4128 {
4129 PUSHMARK (SP);
4130 PUTBACK;
4131 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4132 }
4133
4134 --incede;
4135}
4136
4137
4138MODULE = Coro::State PACKAGE = Coro::AIO
4139
4140void
4141_register (char *target, char *proto, SV *req)
4142 CODE:
4143{
4144 SV *req_cv = s_get_cv_croak (req);
4145 /* newXSproto doesn't return the CV on 5.8 */
4146 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4147 sv_setpv ((SV *)slf_cv, proto);
4148 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4149}
4150
4151MODULE = Coro::State PACKAGE = Coro::Select
4152
4153void
4154patch_pp_sselect ()
4155 CODE:
4156 if (!coro_old_pp_sselect)
4157 {
4158 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4159 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4160 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4161 }
4162
4163void
4164unpatch_pp_sselect ()
4165 CODE:
4166 if (coro_old_pp_sselect)
4167 {
4168 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4169 coro_old_pp_sselect = 0;
4170 }
4171

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