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Comparing Coro/Coro/State.xs (file contents):
Revision 1.212 by root, Wed Oct 10 04:21:33 2007 UTC vs.
Revision 1.406 by root, Sat Jun 11 13:49:00 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/* used in state.h */
137struct io_state 103#define VAR(name,type) VARx(name, PL_ ## name, type)
138{
139 int errorno;
140 I32 laststype;
141 int laststatval;
142 Stat_t statcache;
143};
144 104
105#ifdef __linux
106# include <time.h> /* for timespec */
107# include <syscall.h> /* for SYS_* */
108# ifdef SYS_clock_gettime
109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
110# define CORO_CLOCK_MONOTONIC 1
111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
112# endif
113#endif
114
115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
117
118/* we hijack an hopefully unused CV flag for our purposes */
119#define CVf_SLF 0x4000
120static OP *pp_slf (pTHX);
121static void slf_destroy (pTHX_ struct coro *coro);
122
123static U32 cctx_gen;
145static size_t coro_stacksize = CORO_STACKSIZE; 124static size_t cctx_stacksize = CORO_STACKSIZE;
146static struct CoroAPI coroapi; 125static struct CoroAPI coroapi;
147static AV *main_mainstack; /* used to differentiate between $main and others */ 126static AV *main_mainstack; /* used to differentiate between $main and others */
148static JMPENV *main_top_env; 127static JMPENV *main_top_env;
149static HV *coro_state_stash, *coro_stash; 128static HV *coro_state_stash, *coro_stash;
150static SV *coro_mortal; /* will be freed after next transfer */ 129static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
130
131static AV *av_destroy; /* destruction queue */
132static SV *sv_manager; /* the manager coro */
133static SV *sv_idle; /* $Coro::idle */
151 134
152static GV *irsgv; /* $/ */ 135static GV *irsgv; /* $/ */
153static GV *stdoutgv; /* *STDOUT */ 136static GV *stdoutgv; /* *STDOUT */
154 137static SV *rv_diehook;
138static SV *rv_warnhook;
155static HV *hv_sig; /* %SIG */ 139static HV *hv_sig; /* %SIG */
156static SV *sv_diehook;
157static SV *sv_warnhook;
158 140
159/* async_pool helper stuff */ 141/* async_pool helper stuff */
160static SV *sv_pool_rss; 142static SV *sv_pool_rss;
161static SV *sv_pool_size; 143static SV *sv_pool_size;
144static SV *sv_async_pool_idle; /* description string */
162static AV *av_async_pool; 145static AV *av_async_pool; /* idle pool */
146static SV *sv_Coro; /* class string */
147static CV *cv_pool_handler;
148
149/* Coro::AnyEvent */
150static SV *sv_activity;
151
152/* enable processtime/realtime profiling */
153static char enable_times;
154typedef U32 coro_ts[2];
155static coro_ts time_real, time_cpu;
156static char times_valid;
163 157
164static struct coro_cctx *cctx_first; 158static struct coro_cctx *cctx_first;
165static int cctx_count, cctx_idle; 159static int cctx_count, cctx_idle;
166 160
167enum { 161enum
162{
168 CC_MAPPED = 0x01, 163 CC_MAPPED = 0x01,
169 CC_NOREUSE = 0x02, /* throw this away after tracing */ 164 CC_NOREUSE = 0x02, /* throw this away after tracing */
170 CC_TRACE = 0x04, 165 CC_TRACE = 0x04,
171 CC_TRACE_SUB = 0x08, /* trace sub calls */ 166 CC_TRACE_SUB = 0x08, /* trace sub calls */
172 CC_TRACE_LINE = 0x10, /* trace each statement */ 167 CC_TRACE_LINE = 0x10, /* trace each statement */
173 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 168 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
174}; 169};
175 170
176/* this is a structure representing a c-level coroutine */ 171/* this is a structure representing a c-level coroutine */
177typedef struct coro_cctx { 172typedef struct coro_cctx
173{
178 struct coro_cctx *next; 174 struct coro_cctx *next;
179 175
180 /* the stack */ 176 /* the stack */
181 void *sptr; 177 void *sptr;
182 size_t ssize; 178 size_t ssize;
… …
185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 181 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 182 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
187 JMPENV *top_env; 183 JMPENV *top_env;
188 coro_context cctx; 184 coro_context cctx;
189 185
186 U32 gen;
190#if CORO_USE_VALGRIND 187#if CORO_USE_VALGRIND
191 int valgrind_id; 188 int valgrind_id;
192#endif 189#endif
193 unsigned char flags; 190 unsigned char flags;
194} coro_cctx; 191} coro_cctx;
195 192
193static coro_cctx *cctx_current; /* the currently running cctx */
194
195/*****************************************************************************/
196
197static MGVTBL coro_state_vtbl;
198
196enum { 199enum
200{
197 CF_RUNNING = 0x0001, /* coroutine is running */ 201 CF_RUNNING = 0x0001, /* coroutine is running */
198 CF_READY = 0x0002, /* coroutine is ready */ 202 CF_READY = 0x0002, /* coroutine is ready */
199 CF_NEW = 0x0004, /* has never been switched to */ 203 CF_NEW = 0x0004, /* has never been switched to */
200 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 204 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
205 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
206 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
201}; 207};
202 208
203/* the structure where most of the perl state is stored, overlaid on the cxstack */ 209/* the structure where most of the perl state is stored, overlaid on the cxstack */
204typedef struct { 210typedef struct
205 SV *defsv; 211{
206 AV *defav;
207 SV *errsv;
208 SV *irsgv;
209#define VAR(name,type) type name; 212#define VARx(name,expr,type) type name;
210# include "state.h" 213# include "state.h"
211#undef VAR 214#undef VARx
212} perl_slots; 215} perl_slots;
213 216
217// how many context stack entries do we need for perl_slots
214#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 218#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
215 219
216/* this is a structure representing a perl-level coroutine */ 220/* this is a structure representing a perl-level coroutine */
217struct coro { 221struct coro
222{
218 /* the c coroutine allocated to this perl coroutine, if any */ 223 /* the C coroutine allocated to this perl coroutine, if any */
219 coro_cctx *cctx; 224 coro_cctx *cctx;
220 225
221 /* process data */ 226 /* ready queue */
227 struct coro *next_ready;
228
229 /* state data */
230 struct CoroSLF slf_frame; /* saved slf frame */
222 AV *mainstack; 231 AV *mainstack;
223 perl_slots *slot; /* basically the saved sp */ 232 perl_slots *slot; /* basically the saved sp */
224 233
234 CV *startcv; /* the CV to execute */
225 AV *args; /* data associated with this coroutine (initial args) */ 235 AV *args; /* data associated with this coroutine (initial args) */
226 int refcnt; /* coroutines are refcounted, yes */
227 int flags; /* CF_ flags */ 236 int flags; /* CF_ flags */
228 HV *hv; /* the perl hash associated with this coro, if any */ 237 HV *hv; /* the perl hash associated with this coro, if any */
229 238
230 /* statistics */ 239 /* statistics */
231 int usecount; /* number of transfers to this coro */ 240 int usecount; /* number of transfers to this coro */
232 241
233 /* coro process data */ 242 /* coro process data */
234 int prio; 243 int prio;
235 SV *throw; /* exception to be thrown */ 244 SV *except; /* exception to be thrown */
245 SV *rouse_cb; /* last rouse callback */
246 AV *on_destroy; /* callbacks or coros to notify on destroy */
247 AV *status; /* the exit status list */
236 248
237 /* async_pool */ 249 /* async_pool */
238 SV *saved_deffh; 250 SV *saved_deffh;
251 SV *invoke_cb;
252 AV *invoke_av;
253
254 /* on_enter/on_leave */
255 AV *on_enter;
256 AV *on_leave;
257
258 /* swap_sv */
259 AV *swap_sv;
260
261 /* times */
262 coro_ts t_cpu, t_real;
239 263
240 /* linked list */ 264 /* linked list */
241 struct coro *next, *prev; 265 struct coro *next, *prev;
242}; 266};
243 267
244typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
245typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
246 270
271/* the following variables are effectively part of the perl context */
272/* and get copied between struct coro and these variables */
273/* the main reason we don't support windows process emulation */
274static struct CoroSLF slf_frame; /* the current slf frame */
275
247/** Coro ********************************************************************/ 276/** Coro ********************************************************************/
248 277
249#define PRIO_MAX 3 278#define CORO_PRIO_MAX 3
250#define PRIO_HIGH 1 279#define CORO_PRIO_HIGH 1
251#define PRIO_NORMAL 0 280#define CORO_PRIO_NORMAL 0
252#define PRIO_LOW -1 281#define CORO_PRIO_LOW -1
253#define PRIO_IDLE -3 282#define CORO_PRIO_IDLE -3
254#define PRIO_MIN -4 283#define CORO_PRIO_MIN -4
255 284
256/* for Coro.pm */ 285/* for Coro.pm */
257static SV *coro_current; 286static SV *coro_current;
258static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 287static SV *coro_readyhook;
259static int coro_nready; 288static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
289static CV *cv_coro_run;
260static struct coro *coro_first; 290static struct coro *coro_first;
291#define coro_nready coroapi.nready
292
293/** JIT *********************************************************************/
294
295#if CORO_JIT
296 #ifndef CORO_JIT_TYPE
297 #if __x86_64 && (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris)
298 #define CORO_JIT_TYPE "amd64-unix"
299 typedef void (*load_save_perl_slots_type)(perl_slots *);
300 #else
301 #undef CORO_JIT
302 #endif
303 #endif
304#endif
305
306#if CORO_JIT
307static load_save_perl_slots_type load_perl_slots, save_perl_slots;
308#endif
309
310/** Coro::Select ************************************************************/
311
312static OP *(*coro_old_pp_sselect) (pTHX);
313static SV *coro_select_select;
314
315/* horrible hack, but if it works... */
316static OP *
317coro_pp_sselect (pTHX)
318{
319 dSP;
320 PUSHMARK (SP - 4); /* fake argument list */
321 XPUSHs (coro_select_select);
322 PUTBACK;
323
324 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
325 PL_op->op_flags |= OPf_STACKED;
326 PL_op->op_private = 0;
327 return PL_ppaddr [OP_ENTERSUB](aTHX);
328}
329
330/** time stuff **************************************************************/
331
332#ifdef HAS_GETTIMEOFDAY
333
334ECB_INLINE void
335coro_u2time (pTHX_ UV ret[2])
336{
337 struct timeval tv;
338 gettimeofday (&tv, 0);
339
340 ret [0] = tv.tv_sec;
341 ret [1] = tv.tv_usec;
342}
343
344ECB_INLINE double
345coro_nvtime ()
346{
347 struct timeval tv;
348 gettimeofday (&tv, 0);
349
350 return tv.tv_sec + tv.tv_usec * 1e-6;
351}
352
353ECB_INLINE void
354time_init (pTHX)
355{
356 nvtime = coro_nvtime;
357 u2time = coro_u2time;
358}
359
360#else
361
362ECB_INLINE void
363time_init (pTHX)
364{
365 SV **svp;
366
367 require_pv ("Time/HiRes.pm");
368
369 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
370
371 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
372 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
373
374 nvtime = INT2PTR (double (*)(), SvIV (*svp));
375
376 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
377 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
378}
379
380#endif
261 381
262/** lowlevel stuff **********************************************************/ 382/** lowlevel stuff **********************************************************/
263 383
264static SV * 384static SV * ecb_noinline
265coro_get_sv (const char *name, int create) 385coro_get_sv (pTHX_ const char *name, int create)
266{ 386{
267#if PERL_VERSION_ATLEAST (5,9,0) 387#if PERL_VERSION_ATLEAST (5,10,0)
268 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 388 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
269 get_sv (name, create); 389 get_sv (name, create);
270#endif 390#endif
271 return get_sv (name, create); 391 return get_sv (name, create);
272} 392}
273 393
274static AV * 394static AV * ecb_noinline
275coro_get_av (const char *name, int create) 395coro_get_av (pTHX_ const char *name, int create)
276{ 396{
277#if PERL_VERSION_ATLEAST (5,9,0) 397#if PERL_VERSION_ATLEAST (5,10,0)
278 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 398 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
279 get_av (name, create); 399 get_av (name, create);
280#endif 400#endif
281 return get_av (name, create); 401 return get_av (name, create);
282} 402}
283 403
284static HV * 404static HV * ecb_noinline
285coro_get_hv (const char *name, int create) 405coro_get_hv (pTHX_ const char *name, int create)
286{ 406{
287#if PERL_VERSION_ATLEAST (5,9,0) 407#if PERL_VERSION_ATLEAST (5,10,0)
288 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 408 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
289 get_hv (name, create); 409 get_hv (name, create);
290#endif 410#endif
291 return get_hv (name, create); 411 return get_hv (name, create);
292} 412}
293 413
294static AV * 414ECB_INLINE void
415coro_times_update ()
416{
417#ifdef coro_clock_gettime
418 struct timespec ts;
419
420 ts.tv_sec = ts.tv_nsec = 0;
421 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
422 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
423
424 ts.tv_sec = ts.tv_nsec = 0;
425 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
426 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
427#else
428 dTHX;
429 UV tv[2];
430
431 u2time (aTHX_ tv);
432 time_real [0] = tv [0];
433 time_real [1] = tv [1] * 1000;
434#endif
435}
436
437ECB_INLINE void
438coro_times_add (struct coro *c)
439{
440 c->t_real [1] += time_real [1];
441 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
442 c->t_real [0] += time_real [0];
443
444 c->t_cpu [1] += time_cpu [1];
445 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
446 c->t_cpu [0] += time_cpu [0];
447}
448
449ECB_INLINE void
450coro_times_sub (struct coro *c)
451{
452 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
453 c->t_real [1] -= time_real [1];
454 c->t_real [0] -= time_real [0];
455
456 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
457 c->t_cpu [1] -= time_cpu [1];
458 c->t_cpu [0] -= time_cpu [0];
459}
460
461/*****************************************************************************/
462/* magic glue */
463
464#define CORO_MAGIC_type_cv 26
465#define CORO_MAGIC_type_state PERL_MAGIC_ext
466
467#define CORO_MAGIC_NN(sv, type) \
468 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
469 ? SvMAGIC (sv) \
470 : mg_find (sv, type))
471
472#define CORO_MAGIC(sv, type) \
473 (ecb_expect_true (SvMAGIC (sv)) \
474 ? CORO_MAGIC_NN (sv, type) \
475 : 0)
476
477#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
478#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
479
480ECB_INLINE MAGIC *
481SvSTATEhv_p (pTHX_ SV *coro)
482{
483 MAGIC *mg;
484
485 if (ecb_expect_true (
486 SvTYPE (coro) == SVt_PVHV
487 && (mg = CORO_MAGIC_state (coro))
488 && mg->mg_virtual == &coro_state_vtbl
489 ))
490 return mg;
491
492 return 0;
493}
494
495ECB_INLINE struct coro *
496SvSTATE_ (pTHX_ SV *coro)
497{
498 MAGIC *mg;
499
500 if (SvROK (coro))
501 coro = SvRV (coro);
502
503 mg = SvSTATEhv_p (aTHX_ coro);
504 if (!mg)
505 croak ("Coro::State object required");
506
507 return (struct coro *)mg->mg_ptr;
508}
509
510#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
511
512/* faster than SvSTATE, but expects a coroutine hv */
513#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
514#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
515
516/*****************************************************************************/
517/* padlist management and caching */
518
519ECB_INLINE AV *
295coro_clone_padlist (pTHX_ CV *cv) 520coro_derive_padlist (pTHX_ CV *cv)
296{ 521{
297 AV *padlist = CvPADLIST (cv); 522 AV *padlist = CvPADLIST (cv);
298 AV *newpadlist, *newpad; 523 AV *newpadlist, *newpad;
299 524
300 newpadlist = newAV (); 525 newpadlist = newAV ();
301 AvREAL_off (newpadlist); 526 AvREAL_off (newpadlist);
302#if PERL_VERSION_ATLEAST (5,9,0) 527#if PERL_VERSION_ATLEAST (5,10,0)
303 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 528 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
304#else 529#else
305 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 530 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
306#endif 531#endif
307 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 532 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
308 --AvFILLp (padlist); 533 --AvFILLp (padlist);
309 534
310 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 535 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
311 av_store (newpadlist, 1, (SV *)newpad); 536 av_store (newpadlist, 1, (SV *)newpad);
312 537
313 return newpadlist; 538 return newpadlist;
314} 539}
315 540
316static void 541ECB_INLINE void
317free_padlist (pTHX_ AV *padlist) 542free_padlist (pTHX_ AV *padlist)
318{ 543{
319 /* may be during global destruction */ 544 /* may be during global destruction */
320 if (SvREFCNT (padlist)) 545 if (!IN_DESTRUCT)
321 { 546 {
322 I32 i = AvFILLp (padlist); 547 I32 i = AvFILLp (padlist);
323 while (i >= 0) 548
549 while (i > 0) /* special-case index 0 */
324 { 550 {
325 SV **svp = av_fetch (padlist, i--, FALSE); 551 /* we try to be extra-careful here */
326 if (svp) 552 AV *av = (AV *)AvARRAY (padlist)[i--];
327 { 553 I32 j = AvFILLp (av);
328 SV *sv; 554
329 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 555 while (j >= 0)
556 SvREFCNT_dec (AvARRAY (av)[j--]);
557
558 AvFILLp (av) = -1;
330 SvREFCNT_dec (sv); 559 SvREFCNT_dec (av);
331
332 SvREFCNT_dec (*svp);
333 }
334 } 560 }
335 561
562 SvREFCNT_dec (AvARRAY (padlist)[0]);
563
564 AvFILLp (padlist) = -1;
336 SvREFCNT_dec ((SV*)padlist); 565 SvREFCNT_dec ((SV*)padlist);
337 } 566 }
338} 567}
339 568
340static int 569static int
341coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 570coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
342{ 571{
343 AV *padlist; 572 AV *padlist;
344 AV *av = (AV *)mg->mg_obj; 573 AV *av = (AV *)mg->mg_obj;
574
575 /* perl manages to free our internal AV and _then_ call us */
576 if (IN_DESTRUCT)
577 return 0;
345 578
346 /* casting is fun. */ 579 /* casting is fun. */
347 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 580 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
348 free_padlist (aTHX_ padlist); 581 free_padlist (aTHX_ padlist);
349 582
350 SvREFCNT_dec (av); 583 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
351 584
352 return 0; 585 return 0;
353} 586}
354 587
355#define PERL_MAGIC_coro PERL_MAGIC_ext 588static MGVTBL coro_cv_vtbl = {
356 589 0, 0, 0, 0,
357static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 590 coro_cv_free
358 591};
359#define CORO_MAGIC(cv) \
360 SvMAGIC (cv) \
361 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
362 ? SvMAGIC (cv) \
363 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
364 : 0
365
366static struct coro *
367SvSTATE_ (pTHX_ SV *coro)
368{
369 HV *stash;
370 MAGIC *mg;
371
372 if (SvROK (coro))
373 coro = SvRV (coro);
374
375 if (expect_false (SvTYPE (coro) != SVt_PVHV))
376 croak ("Coro::State object required");
377
378 stash = SvSTASH (coro);
379 if (expect_false (stash != coro_stash && stash != coro_state_stash))
380 {
381 /* very slow, but rare, check */
382 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
383 croak ("Coro::State object required");
384 }
385
386 mg = CORO_MAGIC (coro);
387 return (struct coro *)mg->mg_ptr;
388}
389
390#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
391 592
392/* the next two functions merely cache the padlists */ 593/* the next two functions merely cache the padlists */
393static void 594ECB_INLINE void
394get_padlist (pTHX_ CV *cv) 595get_padlist (pTHX_ CV *cv)
395{ 596{
396 MAGIC *mg = CORO_MAGIC (cv); 597 MAGIC *mg = CORO_MAGIC_cv (cv);
397 AV *av; 598 AV *av;
398 599
399 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 600 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
400 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 601 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
401 else 602 else
402 { 603 {
403#if CORO_PREFER_PERL_FUNCTIONS 604#if CORO_PREFER_PERL_FUNCTIONS
404 /* this is probably cleaner, but also slower? */ 605 /* this is probably cleaner? but also slower! */
606 /* in practise, it seems to be less stable */
405 CV *cp = Perl_cv_clone (cv); 607 CV *cp = Perl_cv_clone (aTHX_ cv);
406 CvPADLIST (cv) = CvPADLIST (cp); 608 CvPADLIST (cv) = CvPADLIST (cp);
407 CvPADLIST (cp) = 0; 609 CvPADLIST (cp) = 0;
408 SvREFCNT_dec (cp); 610 SvREFCNT_dec (cp);
409#else 611#else
410 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 612 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
411#endif 613#endif
412 } 614 }
413} 615}
414 616
415static void 617ECB_INLINE void
416put_padlist (pTHX_ CV *cv) 618put_padlist (pTHX_ CV *cv)
417{ 619{
418 MAGIC *mg = CORO_MAGIC (cv); 620 MAGIC *mg = CORO_MAGIC_cv (cv);
419 AV *av; 621 AV *av;
420 622
421 if (expect_false (!mg)) 623 if (ecb_expect_false (!mg))
422 { 624 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
423 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
424 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
425 mg->mg_virtual = &vtbl_coro;
426 mg->mg_obj = (SV *)newAV ();
427 }
428 625
429 av = (AV *)mg->mg_obj; 626 av = (AV *)mg->mg_obj;
430 627
431 if (expect_false (AvFILLp (av) >= AvMAX (av))) 628 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
432 av_extend (av, AvMAX (av) + 1); 629 av_extend (av, AvFILLp (av) + 1);
433 630
434 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 631 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
435} 632}
436 633
437/** load & save, init *******************************************************/ 634/** load & save, init *******************************************************/
635
636/* swap sv heads, at least logically */
637static void
638swap_svs (pTHX_ Coro__State c)
639{
640 int i;
641
642 for (i = 0; i <= AvFILLp (c->swap_sv); )
643 {
644 SV *a = AvARRAY (c->swap_sv)[i++];
645 SV *b = AvARRAY (c->swap_sv)[i++];
646
647 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
648 SV tmp;
649
650 /* swap sv_any */
651 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
652
653 /* swap sv_flags */
654 SvFLAGS (&tmp) = SvFLAGS (a);
655 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
656 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
657
658#if PERL_VERSION_ATLEAST (5,10,0)
659 /* perl 5.10 complicates this _quite_ a bit, but it also is
660 * much faster, so no quarrels here. alternatively, we could
661 * sv_upgrade to avoid this.
662 */
663 {
664 /* swap sv_u */
665 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
666
667 /* if SvANY points to the head, we need to adjust the pointers,
668 * as the pointer for a still points to b, and maybe vice versa.
669 */
670 #define svany_in_head(type) \
671 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
672
673 if (svany_in_head (SvTYPE (a)))
674 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
675
676 if (svany_in_head (SvTYPE (b)))
677 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
678 }
679#endif
680 }
681}
682
683#define SWAP_SVS(coro) \
684 if (ecb_expect_false ((coro)->swap_sv)) \
685 swap_svs (aTHX_ (coro))
686
687static void
688on_enterleave_call (pTHX_ SV *cb);
438 689
439static void 690static void
440load_perl (pTHX_ Coro__State c) 691load_perl (pTHX_ Coro__State c)
441{ 692{
442 perl_slots *slot = c->slot; 693 perl_slots *slot = c->slot;
443 c->slot = 0; 694 c->slot = 0;
444 695
445 PL_mainstack = c->mainstack; 696 PL_mainstack = c->mainstack;
446 697
447 GvSV (PL_defgv) = slot->defsv; 698#if CORO_JIT
448 GvAV (PL_defgv) = slot->defav; 699 load_perl_slots (slot);
449 GvSV (PL_errgv) = slot->errsv; 700#else
450 GvSV (irsgv) = slot->irsgv;
451
452 #define VAR(name,type) PL_ ## name = slot->name; 701 #define VARx(name,expr,type) expr = slot->name;
453 # include "state.h" 702 # include "state.h"
454 #undef VAR 703 #undef VARx
455 704#endif
456 /*hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0);*/
457 /*hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0);*/
458 705
459 { 706 {
460 dSP; 707 dSP;
461 708
462 CV *cv; 709 CV *cv;
463 710
464 /* now do the ugly restore mess */ 711 /* now do the ugly restore mess */
465 while (expect_true (cv = (CV *)POPs)) 712 while (ecb_expect_true (cv = (CV *)POPs))
466 { 713 {
467 put_padlist (aTHX_ cv); /* mark this padlist as available */ 714 put_padlist (aTHX_ cv); /* mark this padlist as available */
468 CvDEPTH (cv) = PTR2IV (POPs); 715 CvDEPTH (cv) = PTR2IV (POPs);
469 CvPADLIST (cv) = (AV *)POPs; 716 CvPADLIST (cv) = (AV *)POPs;
470 } 717 }
471 718
472 PUTBACK; 719 PUTBACK;
473 } 720 }
721
722 slf_frame = c->slf_frame;
723 CORO_THROW = c->except;
724
725 if (ecb_expect_false (enable_times))
726 {
727 if (ecb_expect_false (!times_valid))
728 coro_times_update ();
729
730 coro_times_sub (c);
731 }
732
733 if (ecb_expect_false (c->on_enter))
734 {
735 int i;
736
737 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
738 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
739 }
740
741 SWAP_SVS (c);
474} 742}
475 743
476static void 744static void
477save_perl (pTHX_ Coro__State c) 745save_perl (pTHX_ Coro__State c)
478{ 746{
747 SWAP_SVS (c);
748
749 if (ecb_expect_false (c->on_leave))
750 {
751 int i;
752
753 for (i = AvFILLp (c->on_leave); i >= 0; --i)
754 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
755 }
756
757 times_valid = 0;
758
759 if (ecb_expect_false (enable_times))
760 {
761 coro_times_update (); times_valid = 1;
762 coro_times_add (c);
763 }
764
765 c->except = CORO_THROW;
766 c->slf_frame = slf_frame;
767
479 { 768 {
480 dSP; 769 dSP;
481 I32 cxix = cxstack_ix; 770 I32 cxix = cxstack_ix;
482 PERL_CONTEXT *ccstk = cxstack; 771 PERL_CONTEXT *ccstk = cxstack;
483 PERL_SI *top_si = PL_curstackinfo; 772 PERL_SI *top_si = PL_curstackinfo;
… …
489 778
490 XPUSHs (Nullsv); 779 XPUSHs (Nullsv);
491 /* this loop was inspired by pp_caller */ 780 /* this loop was inspired by pp_caller */
492 for (;;) 781 for (;;)
493 { 782 {
494 while (expect_true (cxix >= 0)) 783 while (ecb_expect_true (cxix >= 0))
495 { 784 {
496 PERL_CONTEXT *cx = &ccstk[cxix--]; 785 PERL_CONTEXT *cx = &ccstk[cxix--];
497 786
498 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 787 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
499 { 788 {
500 CV *cv = cx->blk_sub.cv; 789 CV *cv = cx->blk_sub.cv;
501 790
502 if (expect_true (CvDEPTH (cv))) 791 if (ecb_expect_true (CvDEPTH (cv)))
503 { 792 {
504 EXTEND (SP, 3); 793 EXTEND (SP, 3);
505 PUSHs ((SV *)CvPADLIST (cv)); 794 PUSHs ((SV *)CvPADLIST (cv));
506 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 795 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
507 PUSHs ((SV *)cv); 796 PUSHs ((SV *)cv);
508 797
509 CvDEPTH (cv) = 0; 798 CvDEPTH (cv) = 0;
510 get_padlist (aTHX_ cv); 799 get_padlist (aTHX_ cv);
511 } 800 }
512 } 801 }
513 } 802 }
514 803
515 if (expect_true (top_si->si_type == PERLSI_MAIN)) 804 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
516 break; 805 break;
517 806
518 top_si = top_si->si_prev; 807 top_si = top_si->si_prev;
519 ccstk = top_si->si_cxstack; 808 ccstk = top_si->si_cxstack;
520 cxix = top_si->si_cxix; 809 cxix = top_si->si_cxix;
… …
522 811
523 PUTBACK; 812 PUTBACK;
524 } 813 }
525 814
526 /* allocate some space on the context stack for our purposes */ 815 /* allocate some space on the context stack for our purposes */
527 /* we manually unroll here, as usually 2 slots is enough */ 816 if (ecb_expect_false (cxstack_ix + SLOT_COUNT >= cxstack_max))
528 if (SLOT_COUNT >= 1) CXINC;
529 if (SLOT_COUNT >= 2) CXINC;
530 if (SLOT_COUNT >= 3) CXINC;
531 { 817 {
532 int i; 818 unsigned int i;
819
533 for (i = 3; i < SLOT_COUNT; ++i) 820 for (i = 0; i < SLOT_COUNT; ++i)
534 CXINC; 821 CXINC;
535 } 822
536 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 823 cxstack_ix -= SLOT_COUNT; /* undo allocation */
824 }
537 825
538 c->mainstack = PL_mainstack; 826 c->mainstack = PL_mainstack;
539 827
540 { 828 {
541 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 829 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
542 830
543 slot->defav = GvAV (PL_defgv); 831#if CORO_JIT
544 slot->defsv = DEFSV; 832 save_perl_slots (slot);
545 slot->errsv = ERRSV; 833#else
546 slot->irsgv = GvSV (irsgv);
547
548 #define VAR(name,type) slot->name = PL_ ## name; 834 #define VARx(name,expr,type) slot->name = expr;
549 # include "state.h" 835 # include "state.h"
550 #undef VAR 836 #undef VARx
837#endif
551 } 838 }
552} 839}
553 840
554/* 841/*
555 * allocate various perl stacks. This is an exact copy 842 * allocate various perl stacks. This is almost an exact copy
556 * of perl.c:init_stacks, except that it uses less memory 843 * of perl.c:init_stacks, except that it uses less memory
557 * on the (sometimes correct) assumption that coroutines do 844 * on the (sometimes correct) assumption that coroutines do
558 * not usually need a lot of stackspace. 845 * not usually need a lot of stackspace.
559 */ 846 */
560#if CORO_PREFER_PERL_FUNCTIONS 847#if CORO_PREFER_PERL_FUNCTIONS
561# define coro_init_stacks init_stacks 848# define coro_init_stacks(thx) init_stacks ()
562#else 849#else
563static void 850static void
564coro_init_stacks (pTHX) 851coro_init_stacks (pTHX)
565{ 852{
566 PL_curstackinfo = new_stackinfo(32, 8); 853 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
567 PL_curstackinfo->si_type = PERLSI_MAIN; 854 PL_curstackinfo->si_type = PERLSI_MAIN;
568 PL_curstack = PL_curstackinfo->si_stack; 855 PL_curstack = PL_curstackinfo->si_stack;
569 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 856 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
570 857
571 PL_stack_base = AvARRAY(PL_curstack); 858 PL_stack_base = AvARRAY(PL_curstack);
… …
591 878
592 New(54,PL_savestack,24,ANY); 879 New(54,PL_savestack,24,ANY);
593 PL_savestack_ix = 0; 880 PL_savestack_ix = 0;
594 PL_savestack_max = 24; 881 PL_savestack_max = 24;
595 882
596#if !PERL_VERSION_ATLEAST (5,9,0) 883#if !PERL_VERSION_ATLEAST (5,10,0)
597 New(54,PL_retstack,4,OP*); 884 New(54,PL_retstack,4,OP*);
598 PL_retstack_ix = 0; 885 PL_retstack_ix = 0;
599 PL_retstack_max = 4; 886 PL_retstack_max = 4;
600#endif 887#endif
601} 888}
… …
603 890
604/* 891/*
605 * destroy the stacks, the callchain etc... 892 * destroy the stacks, the callchain etc...
606 */ 893 */
607static void 894static void
608coro_destroy_stacks (pTHX) 895coro_destruct_stacks (pTHX)
609{ 896{
610 while (PL_curstackinfo->si_next) 897 while (PL_curstackinfo->si_next)
611 PL_curstackinfo = PL_curstackinfo->si_next; 898 PL_curstackinfo = PL_curstackinfo->si_next;
612 899
613 while (PL_curstackinfo) 900 while (PL_curstackinfo)
… …
624 911
625 Safefree (PL_tmps_stack); 912 Safefree (PL_tmps_stack);
626 Safefree (PL_markstack); 913 Safefree (PL_markstack);
627 Safefree (PL_scopestack); 914 Safefree (PL_scopestack);
628 Safefree (PL_savestack); 915 Safefree (PL_savestack);
629#if !PERL_VERSION_ATLEAST (5,9,0) 916#if !PERL_VERSION_ATLEAST (5,10,0)
630 Safefree (PL_retstack); 917 Safefree (PL_retstack);
631#endif 918#endif
632} 919}
633 920
921#define CORO_RSS \
922 rss += sizeof (SYM (curstackinfo)); \
923 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
924 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
925 rss += SYM (tmps_max) * sizeof (SV *); \
926 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
927 rss += SYM (scopestack_max) * sizeof (I32); \
928 rss += SYM (savestack_max) * sizeof (ANY);
929
634static size_t 930static size_t
635coro_rss (pTHX_ struct coro *coro) 931coro_rss (pTHX_ struct coro *coro)
636{ 932{
637 size_t rss = sizeof (*coro); 933 size_t rss = sizeof (*coro);
638 934
639 if (coro->mainstack) 935 if (coro->mainstack)
640 { 936 {
641 perl_slots tmp_slot;
642 perl_slots *slot;
643
644 if (coro->flags & CF_RUNNING) 937 if (coro->flags & CF_RUNNING)
645 { 938 {
646 slot = &tmp_slot; 939 #define SYM(sym) PL_ ## sym
647 940 CORO_RSS;
648 #define VAR(name,type) slot->name = PL_ ## name;
649 # include "state.h"
650 #undef VAR 941 #undef SYM
651 } 942 }
652 else 943 else
653 slot = coro->slot; 944 {
945 #define SYM(sym) coro->slot->sym
946 CORO_RSS;
947 #undef SYM
948 }
949 }
654 950
655 rss += sizeof (slot->curstackinfo); 951 return rss;
656 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 952}
657 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
658 rss += slot->tmps_max * sizeof (SV *);
659 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
660 rss += slot->scopestack_max * sizeof (I32);
661 rss += slot->savestack_max * sizeof (ANY);
662 953
663#if !PERL_VERSION_ATLEAST (5,9,0) 954/** coroutine stack handling ************************************************/
664 rss += slot->retstack_max * sizeof (OP *); 955
956static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
957static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
958static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
959
960/* apparently < 5.8.8 */
961#ifndef MgPV_nolen_const
962#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
963 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
964 (const char*)(mg)->mg_ptr)
665#endif 965#endif
966
967/*
968 * This overrides the default magic get method of %SIG elements.
969 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
970 * and instead of trying to save and restore the hash elements (extremely slow),
971 * we just provide our own readback here.
972 */
973static int ecb_cold
974coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
975{
976 const char *s = MgPV_nolen_const (mg);
977
978 if (*s == '_')
666 } 979 {
980 SV **svp = 0;
667 981
982 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
983 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
984
985 if (svp)
986 {
987 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
988 return 0;
989 }
990 }
991
992 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
993}
994
995static int ecb_cold
996coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
997{
998 const char *s = MgPV_nolen_const (mg);
999
1000 if (*s == '_')
1001 {
1002 SV **svp = 0;
1003
1004 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1005 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1006
1007 if (svp)
1008 {
1009 SV *old = *svp;
1010 *svp = 0;
1011 SvREFCNT_dec (old);
1012 return 0;
1013 }
1014 }
1015
1016 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1017}
1018
1019static int ecb_cold
1020coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1021{
1022 const char *s = MgPV_nolen_const (mg);
1023
1024 if (*s == '_')
1025 {
1026 SV **svp = 0;
1027
1028 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1029 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1030
1031 if (svp)
1032 {
1033 SV *old = *svp;
1034 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1035 SvREFCNT_dec (old);
1036 return 0;
1037 }
1038 }
1039
1040 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1041}
1042
1043static void
1044prepare_nop (pTHX_ struct coro_transfer_args *ta)
1045{
1046 /* kind of mega-hacky, but works */
1047 ta->next = ta->prev = (struct coro *)ta;
1048}
1049
1050static int
1051slf_check_nop (pTHX_ struct CoroSLF *frame)
1052{
668 return rss; 1053 return 0;
669} 1054}
670 1055
671/** coroutine stack handling ************************************************/
672
673static void 1056static int
1057slf_check_repeat (pTHX_ struct CoroSLF *frame)
1058{
1059 return 1;
1060}
1061
1062static UNOP init_perl_op;
1063
1064ecb_noinline static void /* noinline to keep it out of the transfer fast path */
674coro_setup (pTHX_ struct coro *coro) 1065init_perl (pTHX_ struct coro *coro)
675{ 1066{
676 /* 1067 /*
677 * emulate part of the perl startup here. 1068 * emulate part of the perl startup here.
678 */ 1069 */
679 coro_init_stacks (aTHX); 1070 coro_init_stacks (aTHX);
680 1071
681 PL_runops = RUNOPS_DEFAULT; 1072 PL_runops = RUNOPS_DEFAULT;
682 PL_curcop = &PL_compiling; 1073 PL_curcop = &PL_compiling;
683 PL_in_eval = EVAL_NULL; 1074 PL_in_eval = EVAL_NULL;
684 PL_comppad = 0; 1075 PL_comppad = 0;
1076 PL_comppad_name = 0;
1077 PL_comppad_name_fill = 0;
1078 PL_comppad_name_floor = 0;
685 PL_curpm = 0; 1079 PL_curpm = 0;
686 PL_curpad = 0; 1080 PL_curpad = 0;
687 PL_localizing = 0; 1081 PL_localizing = 0;
688 PL_dirty = 0;
689 PL_restartop = 0; 1082 PL_restartop = 0;
690 PL_diehook = 0; hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0); 1083#if PERL_VERSION_ATLEAST (5,10,0)
691 PL_warnhook = 0; hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0); 1084 PL_parser = 0;
1085#endif
1086 PL_hints = 0;
1087
1088 /* recreate the die/warn hooks */
1089 PL_diehook = SvREFCNT_inc (rv_diehook);
1090 PL_warnhook = SvREFCNT_inc (rv_warnhook);
692 1091
693 GvSV (PL_defgv) = newSV (0); 1092 GvSV (PL_defgv) = newSV (0);
694 GvAV (PL_defgv) = coro->args; coro->args = 0; 1093 GvAV (PL_defgv) = coro->args; coro->args = 0;
695 GvSV (PL_errgv) = newSV (0); 1094 GvSV (PL_errgv) = newSV (0);
696 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1095 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1096 GvHV (PL_hintgv) = 0;
697 PL_rs = newSVsv (GvSV (irsgv)); 1097 PL_rs = newSVsv (GvSV (irsgv));
698 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 1098 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
699 1099
700 { 1100 {
701 dSP; 1101 dSP;
702 LOGOP myop; 1102 UNOP myop;
703 1103
704 Zero (&myop, 1, LOGOP); 1104 Zero (&myop, 1, UNOP);
705 myop.op_next = Nullop; 1105 myop.op_next = Nullop;
1106 myop.op_type = OP_ENTERSUB;
706 myop.op_flags = OPf_WANT_VOID; 1107 myop.op_flags = OPf_WANT_VOID;
707 1108
708 PUSHMARK (SP); 1109 PUSHMARK (SP);
709 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1110 PUSHs ((SV *)coro->startcv);
710 PUTBACK; 1111 PUTBACK;
711 PL_op = (OP *)&myop; 1112 PL_op = (OP *)&myop;
712 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1113 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
713 SPAGAIN;
714 } 1114 }
715 1115
716 /* this newly created coroutine might be run on an existing cctx which most 1116 /* this newly created coroutine might be run on an existing cctx which most
717 * likely was suspended in set_stacklevel, called from entersub. 1117 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
718 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
719 * so we ENTER here for symmetry
720 */ 1118 */
721 ENTER; 1119 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
722} 1120 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1121 slf_frame.destroy = 0;
723 1122
1123 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1124 init_perl_op.op_next = PL_op;
1125 init_perl_op.op_type = OP_ENTERSUB;
1126 init_perl_op.op_ppaddr = pp_slf;
1127 /* no flags etc. required, as an init function won't be called */
1128
1129 PL_op = (OP *)&init_perl_op;
1130
1131 /* copy throw, in case it was set before init_perl */
1132 CORO_THROW = coro->except;
1133
1134 SWAP_SVS (coro);
1135
1136 if (ecb_expect_false (enable_times))
1137 {
1138 coro_times_update ();
1139 coro_times_sub (coro);
1140 }
1141}
1142
724static void 1143static void
725coro_destroy (pTHX_ struct coro *coro) 1144coro_unwind_stacks (pTHX)
726{ 1145{
727 if (!IN_DESTRUCT) 1146 if (!IN_DESTRUCT)
728 { 1147 {
729 /* restore all saved variables and stuff */ 1148 /* restore all saved variables and stuff */
730 LEAVE_SCOPE (0); 1149 LEAVE_SCOPE (0);
… …
738 POPSTACK_TO (PL_mainstack); 1157 POPSTACK_TO (PL_mainstack);
739 1158
740 /* unwind main stack */ 1159 /* unwind main stack */
741 dounwind (-1); 1160 dounwind (-1);
742 } 1161 }
1162}
743 1163
744 SvREFCNT_dec (GvSV (PL_defgv)); 1164static void
745 SvREFCNT_dec (GvAV (PL_defgv)); 1165destroy_perl (pTHX_ struct coro *coro)
746 SvREFCNT_dec (GvSV (PL_errgv)); 1166{
747 SvREFCNT_dec (PL_defoutgv); 1167 SV *svf [9];
748 SvREFCNT_dec (PL_rs);
749 SvREFCNT_dec (GvSV (irsgv));
750 1168
751 SvREFCNT_dec (PL_diehook);
752 SvREFCNT_dec (PL_warnhook);
753 1169 {
1170 SV *old_current = SvRV (coro_current);
1171 struct coro *current = SvSTATE (old_current);
1172
1173 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1174
1175 save_perl (aTHX_ current);
1176
1177 /* this will cause transfer_check to croak on block*/
1178 SvRV_set (coro_current, (SV *)coro->hv);
1179
1180 load_perl (aTHX_ coro);
1181
1182 coro_unwind_stacks (aTHX);
1183
1184 /* restore swapped sv's */
1185 SWAP_SVS (coro);
1186
1187 coro_destruct_stacks (aTHX);
1188
1189 // now save some sv's to be free'd later
1190 svf [0] = GvSV (PL_defgv);
1191 svf [1] = (SV *)GvAV (PL_defgv);
1192 svf [2] = GvSV (PL_errgv);
1193 svf [3] = (SV *)PL_defoutgv;
1194 svf [4] = PL_rs;
1195 svf [5] = GvSV (irsgv);
1196 svf [6] = (SV *)GvHV (PL_hintgv);
1197 svf [7] = PL_diehook;
1198 svf [8] = PL_warnhook;
1199 assert (9 == sizeof (svf) / sizeof (*svf));
1200
1201 SvRV_set (coro_current, old_current);
1202
1203 load_perl (aTHX_ current);
1204 }
1205
1206 {
1207 unsigned int i;
1208
1209 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1210 SvREFCNT_dec (svf [i]);
1211
754 SvREFCNT_dec (coro->saved_deffh); 1212 SvREFCNT_dec (coro->saved_deffh);
755 SvREFCNT_dec (coro->throw); 1213 SvREFCNT_dec (coro->rouse_cb);
756 1214 SvREFCNT_dec (coro->invoke_cb);
757 coro_destroy_stacks (aTHX); 1215 SvREFCNT_dec (coro->invoke_av);
1216 }
758} 1217}
759 1218
760static void 1219ECB_INLINE void
761free_coro_mortal (pTHX) 1220free_coro_mortal (pTHX)
762{ 1221{
763 if (expect_true (coro_mortal)) 1222 if (ecb_expect_true (coro_mortal))
764 { 1223 {
765 SvREFCNT_dec (coro_mortal); 1224 SvREFCNT_dec ((SV *)coro_mortal);
766 coro_mortal = 0; 1225 coro_mortal = 0;
767 } 1226 }
768} 1227}
769 1228
770static int 1229static int
771runops_trace (pTHX) 1230runops_trace (pTHX)
772{ 1231{
773 COP *oldcop = 0; 1232 COP *oldcop = 0;
774 int oldcxix = -2; 1233 int oldcxix = -2;
775 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
776 coro_cctx *cctx = coro->cctx;
777 1234
778 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1235 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
779 { 1236 {
780 PERL_ASYNC_CHECK (); 1237 PERL_ASYNC_CHECK ();
781 1238
782 if (cctx->flags & CC_TRACE_ALL) 1239 if (cctx_current->flags & CC_TRACE_ALL)
783 { 1240 {
784 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1241 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
785 { 1242 {
786 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1243 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
787 SV **bot, **top; 1244 SV **bot, **top;
788 AV *av = newAV (); /* return values */ 1245 AV *av = newAV (); /* return values */
789 SV **cb; 1246 SV **cb;
… …
799 : cx->blk_gimme == G_SCALAR ? bot + 1 1256 : cx->blk_gimme == G_SCALAR ? bot + 1
800 : bot; 1257 : bot;
801 1258
802 av_extend (av, top - bot); 1259 av_extend (av, top - bot);
803 while (bot < top) 1260 while (bot < top)
804 av_push (av, SvREFCNT_inc (*bot++)); 1261 av_push (av, SvREFCNT_inc_NN (*bot++));
805 1262
806 PL_runops = RUNOPS_DEFAULT; 1263 PL_runops = RUNOPS_DEFAULT;
807 ENTER; 1264 ENTER;
808 SAVETMPS; 1265 SAVETMPS;
809 EXTEND (SP, 3); 1266 EXTEND (SP, 3);
… …
826 1283
827 if (PL_curcop != &PL_compiling) 1284 if (PL_curcop != &PL_compiling)
828 { 1285 {
829 SV **cb; 1286 SV **cb;
830 1287
831 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1288 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
832 { 1289 {
833 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1290 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
834 1291
835 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1292 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
836 { 1293 {
837 runops_proc_t old_runops = PL_runops;
838 dSP; 1294 dSP;
839 GV *gv = CvGV (cx->blk_sub.cv); 1295 GV *gv = CvGV (cx->blk_sub.cv);
840 SV *fullname = sv_2mortal (newSV (0)); 1296 SV *fullname = sv_2mortal (newSV (0));
841 1297
842 if (isGV (gv)) 1298 if (isGV (gv))
… …
847 SAVETMPS; 1303 SAVETMPS;
848 EXTEND (SP, 3); 1304 EXTEND (SP, 3);
849 PUSHMARK (SP); 1305 PUSHMARK (SP);
850 PUSHs (&PL_sv_yes); 1306 PUSHs (&PL_sv_yes);
851 PUSHs (fullname); 1307 PUSHs (fullname);
852 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1308 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
853 PUTBACK; 1309 PUTBACK;
854 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1310 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
855 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1311 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
856 SPAGAIN; 1312 SPAGAIN;
857 FREETMPS; 1313 FREETMPS;
… …
860 } 1316 }
861 1317
862 oldcxix = cxstack_ix; 1318 oldcxix = cxstack_ix;
863 } 1319 }
864 1320
865 if (cctx->flags & CC_TRACE_LINE) 1321 if (cctx_current->flags & CC_TRACE_LINE)
866 { 1322 {
867 dSP; 1323 dSP;
868 1324
869 PL_runops = RUNOPS_DEFAULT; 1325 PL_runops = RUNOPS_DEFAULT;
870 ENTER; 1326 ENTER;
… …
889 1345
890 TAINT_NOT; 1346 TAINT_NOT;
891 return 0; 1347 return 0;
892} 1348}
893 1349
894/* inject a fake call to Coro::State::_cctx_init into the execution */ 1350static struct CoroSLF cctx_ssl_frame;
895/* _cctx_init should be careful, as it could be called at almost any time */
896/* during execution of a perl program */
897static void NOINLINE
898cctx_prepare (pTHX_ coro_cctx *cctx)
899{
900 dSP;
901 LOGOP myop;
902 1351
1352static void
1353slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1354{
1355 ta->prev = 0;
1356}
1357
1358static int
1359slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1360{
1361 *frame = cctx_ssl_frame;
1362
1363 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1364}
1365
1366/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1367static void ecb_noinline
1368cctx_prepare (pTHX)
1369{
903 PL_top_env = &PL_start_env; 1370 PL_top_env = &PL_start_env;
904 1371
905 if (cctx->flags & CC_TRACE) 1372 if (cctx_current->flags & CC_TRACE)
906 PL_runops = runops_trace; 1373 PL_runops = runops_trace;
907 1374
908 Zero (&myop, 1, LOGOP); 1375 /* we already must be executing an SLF op, there is no other valid way
909 myop.op_next = PL_op; 1376 * that can lead to creation of a new cctx */
910 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1377 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1378 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
911 1379
912 PUSHMARK (SP); 1380 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
913 EXTEND (SP, 2); 1381 cctx_ssl_frame = slf_frame;
914 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1382
915 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1383 slf_frame.prepare = slf_prepare_set_stacklevel;
916 PUTBACK; 1384 slf_frame.check = slf_check_set_stacklevel;
917 PL_op = (OP *)&myop; 1385}
918 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1386
919 SPAGAIN; 1387/* the tail of transfer: execute stuff we can only do after a transfer */
1388ECB_INLINE void
1389transfer_tail (pTHX)
1390{
1391 free_coro_mortal (aTHX);
920} 1392}
921 1393
922/* 1394/*
923 * this is a _very_ stripped down perl interpreter ;) 1395 * this is a _very_ stripped down perl interpreter ;)
924 */ 1396 */
925static void 1397static void
926cctx_run (void *arg) 1398cctx_run (void *arg)
927{ 1399{
1400#ifdef USE_ITHREADS
1401# if CORO_PTHREAD
1402 PERL_SET_CONTEXT (coro_thx);
1403# endif
1404#endif
1405 {
928 dTHX; 1406 dTHX;
929 1407
930 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1408 /* normally we would need to skip the entersub here */
931 UNLOCK; 1409 /* not doing so will re-execute it, which is exactly what we want */
932
933 /* we now skip the entersub that lead to transfer() */
934 PL_op = PL_op->op_next; 1410 /* PL_nop = PL_nop->op_next */
935 1411
936 /* inject a fake subroutine call to cctx_init */ 1412 /* inject a fake subroutine call to cctx_init */
937 cctx_prepare (aTHX_ (coro_cctx *)arg); 1413 cctx_prepare (aTHX);
938 1414
1415 /* cctx_run is the alternative tail of transfer() */
1416 transfer_tail (aTHX);
1417
939 /* somebody or something will hit me for both perl_run and PL_restartop */ 1418 /* somebody or something will hit me for both perl_run and PL_restartop */
940 PL_restartop = PL_op; 1419 PL_restartop = PL_op;
941 perl_run (PL_curinterp); 1420 perl_run (PL_curinterp);
942
943 /* 1421 /*
1422 * Unfortunately, there is no way to get at the return values of the
1423 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1424 * runtime errors here, as this is just a random interpreter, not a thread.
1425 */
1426
1427 /*
944 * If perl-run returns we assume exit() was being called or the coro 1428 * If perl-run returns we assume exit() was being called or the coro
945 * fell off the end, which seems to be the only valid (non-bug) 1429 * fell off the end, which seems to be the only valid (non-bug)
946 * reason for perl_run to return. We try to exit by jumping to the 1430 * reason for perl_run to return. We try to exit by jumping to the
947 * bootstrap-time "top" top_env, as we cannot restore the "main" 1431 * bootstrap-time "top" top_env, as we cannot restore the "main"
948 * coroutine as Coro has no such concept 1432 * coroutine as Coro has no such concept.
1433 * This actually isn't valid with the pthread backend, but OSes requiring
1434 * that backend are too broken to do it in a standards-compliant way.
949 */ 1435 */
950 PL_top_env = main_top_env; 1436 PL_top_env = main_top_env;
951 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1437 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1438 }
952} 1439}
953 1440
954static coro_cctx * 1441static coro_cctx *
955cctx_new () 1442cctx_new ()
956{ 1443{
957 coro_cctx *cctx; 1444 coro_cctx *cctx;
1445
1446 ++cctx_count;
1447 New (0, cctx, 1, coro_cctx);
1448
1449 cctx->gen = cctx_gen;
1450 cctx->flags = 0;
1451 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1452
1453 return cctx;
1454}
1455
1456/* create a new cctx only suitable as source */
1457static coro_cctx *
1458cctx_new_empty ()
1459{
1460 coro_cctx *cctx = cctx_new ();
1461
1462 cctx->sptr = 0;
1463 coro_create (&cctx->cctx, 0, 0, 0, 0);
1464
1465 return cctx;
1466}
1467
1468/* create a new cctx suitable as destination/running a perl interpreter */
1469static coro_cctx *
1470cctx_new_run ()
1471{
1472 coro_cctx *cctx = cctx_new ();
958 void *stack_start; 1473 void *stack_start;
959 size_t stack_size; 1474 size_t stack_size;
960 1475
961 ++cctx_count;
962
963 Newz (0, cctx, 1, coro_cctx);
964
965#if HAVE_MMAP 1476#if HAVE_MMAP
966 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1477 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
967 /* mmap supposedly does allocate-on-write for us */ 1478 /* mmap supposedly does allocate-on-write for us */
968 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1479 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
969 1480
970 if (cctx->sptr != (void *)-1) 1481 if (cctx->sptr != (void *)-1)
971 { 1482 {
972# if CORO_STACKGUARD 1483 #if CORO_STACKGUARD
973 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1484 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
974# endif 1485 #endif
975 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1486 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
976 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1487 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
977 cctx->flags |= CC_MAPPED; 1488 cctx->flags |= CC_MAPPED;
978 } 1489 }
979 else 1490 else
980#endif 1491#endif
981 { 1492 {
982 cctx->ssize = coro_stacksize * (long)sizeof (long); 1493 cctx->ssize = cctx_stacksize * (long)sizeof (long);
983 New (0, cctx->sptr, coro_stacksize, long); 1494 New (0, cctx->sptr, cctx_stacksize, long);
984 1495
985 if (!cctx->sptr) 1496 if (!cctx->sptr)
986 { 1497 {
987 perror ("FATAL: unable to allocate stack for coroutine"); 1498 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
988 _exit (EXIT_FAILURE); 1499 _exit (EXIT_FAILURE);
989 } 1500 }
990 1501
991 stack_start = cctx->sptr; 1502 stack_start = cctx->sptr;
992 stack_size = cctx->ssize; 1503 stack_size = cctx->ssize;
993 } 1504 }
994 1505
995 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1506 #if CORO_USE_VALGRIND
1507 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1508 #endif
1509
996 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1510 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
997 1511
998 return cctx; 1512 return cctx;
999} 1513}
1000 1514
… …
1002cctx_destroy (coro_cctx *cctx) 1516cctx_destroy (coro_cctx *cctx)
1003{ 1517{
1004 if (!cctx) 1518 if (!cctx)
1005 return; 1519 return;
1006 1520
1521 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1522
1007 --cctx_count; 1523 --cctx_count;
1524 coro_destroy (&cctx->cctx);
1008 1525
1526 /* coro_transfer creates new, empty cctx's */
1527 if (cctx->sptr)
1528 {
1009#if CORO_USE_VALGRIND 1529 #if CORO_USE_VALGRIND
1010 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1530 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1531 #endif
1532
1533#if HAVE_MMAP
1534 if (cctx->flags & CC_MAPPED)
1535 munmap (cctx->sptr, cctx->ssize);
1536 else
1011#endif 1537#endif
1012
1013#if HAVE_MMAP
1014 if (cctx->flags & CC_MAPPED)
1015 munmap (cctx->sptr, cctx->ssize);
1016 else
1017#endif
1018 Safefree (cctx->sptr); 1538 Safefree (cctx->sptr);
1539 }
1019 1540
1020 Safefree (cctx); 1541 Safefree (cctx);
1021} 1542}
1022 1543
1023/* wether this cctx should be destructed */ 1544/* wether this cctx should be destructed */
1024#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1545#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1025 1546
1026static coro_cctx * 1547static coro_cctx *
1027cctx_get (pTHX) 1548cctx_get (pTHX)
1028{ 1549{
1029 while (expect_true (cctx_first)) 1550 while (ecb_expect_true (cctx_first))
1030 { 1551 {
1031 coro_cctx *cctx = cctx_first; 1552 coro_cctx *cctx = cctx_first;
1032 cctx_first = cctx->next; 1553 cctx_first = cctx->next;
1033 --cctx_idle; 1554 --cctx_idle;
1034 1555
1035 if (expect_true (!CCTX_EXPIRED (cctx))) 1556 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1036 return cctx; 1557 return cctx;
1037 1558
1038 cctx_destroy (cctx); 1559 cctx_destroy (cctx);
1039 } 1560 }
1040 1561
1041 return cctx_new (); 1562 return cctx_new_run ();
1042} 1563}
1043 1564
1044static void 1565static void
1045cctx_put (coro_cctx *cctx) 1566cctx_put (coro_cctx *cctx)
1046{ 1567{
1568 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1569
1047 /* free another cctx if overlimit */ 1570 /* free another cctx if overlimit */
1048 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1571 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1049 { 1572 {
1050 coro_cctx *first = cctx_first; 1573 coro_cctx *first = cctx_first;
1051 cctx_first = first->next; 1574 cctx_first = first->next;
1052 --cctx_idle; 1575 --cctx_idle;
1053 1576
… …
1062/** coroutine switching *****************************************************/ 1585/** coroutine switching *****************************************************/
1063 1586
1064static void 1587static void
1065transfer_check (pTHX_ struct coro *prev, struct coro *next) 1588transfer_check (pTHX_ struct coro *prev, struct coro *next)
1066{ 1589{
1590 /* TODO: throwing up here is considered harmful */
1591
1067 if (expect_true (prev != next)) 1592 if (ecb_expect_true (prev != next))
1068 { 1593 {
1069 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1594 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1070 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1595 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1071 1596
1072 if (expect_false (next->flags & CF_RUNNING)) 1597 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1073 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1074
1075 if (expect_false (next->flags & CF_DESTROYED))
1076 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1598 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1077 1599
1078 if (
1079#if PERL_VERSION_ATLEAST (5,9,0) 1600#if !PERL_VERSION_ATLEAST (5,10,0)
1080 expect_false (PL_parser)
1081#else
1082 expect_false (PL_lex_state != LEX_NOTPARSING) 1601 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1602 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1083#endif 1603#endif
1084 )
1085 croak ("Coro::State::transfer called while parsing, but this is not supported");
1086 } 1604 }
1087} 1605}
1088 1606
1089/* always use the TRANSFER macro */ 1607/* always use the TRANSFER macro */
1090static void NOINLINE 1608static void ecb_noinline /* noinline so we have a fixed stackframe */
1091transfer (pTHX_ struct coro *prev, struct coro *next) 1609transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1092{ 1610{
1093 dSTACKLEVEL; 1611 dSTACKLEVEL;
1094 1612
1095 /* sometimes transfer is only called to set idle_sp */ 1613 /* sometimes transfer is only called to set idle_sp */
1096 if (expect_false (!next)) 1614 if (ecb_expect_false (!prev))
1097 { 1615 {
1098 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1616 cctx_current->idle_sp = STACKLEVEL;
1099 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1617 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1100 } 1618 }
1101 else if (expect_true (prev != next)) 1619 else if (ecb_expect_true (prev != next))
1102 { 1620 {
1103 coro_cctx *prev__cctx; 1621 coro_cctx *cctx_prev;
1104 1622
1105 if (expect_false (prev->flags & CF_NEW)) 1623 if (ecb_expect_false (prev->flags & CF_NEW))
1106 { 1624 {
1107 /* create a new empty context */ 1625 /* create a new empty/source context */
1108 Newz (0, prev->cctx, 1, coro_cctx);
1109 prev->flags &= ~CF_NEW; 1626 prev->flags &= ~CF_NEW;
1110 prev->flags |= CF_RUNNING; 1627 prev->flags |= CF_RUNNING;
1111 } 1628 }
1112 1629
1113 prev->flags &= ~CF_RUNNING; 1630 prev->flags &= ~CF_RUNNING;
1114 next->flags |= CF_RUNNING; 1631 next->flags |= CF_RUNNING;
1115 1632
1116 LOCK; 1633 /* first get rid of the old state */
1634 save_perl (aTHX_ prev);
1117 1635
1118 if (expect_false (next->flags & CF_NEW)) 1636 if (ecb_expect_false (next->flags & CF_NEW))
1119 { 1637 {
1120 /* need to start coroutine */ 1638 /* need to start coroutine */
1121 next->flags &= ~CF_NEW; 1639 next->flags &= ~CF_NEW;
1122 /* first get rid of the old state */
1123 save_perl (aTHX_ prev);
1124 /* setup coroutine call */ 1640 /* setup coroutine call */
1125 coro_setup (aTHX_ next); 1641 init_perl (aTHX_ next);
1126 } 1642 }
1127 else 1643 else
1644 load_perl (aTHX_ next);
1645
1646 /* possibly untie and reuse the cctx */
1647 if (ecb_expect_true (
1648 cctx_current->idle_sp == STACKLEVEL
1649 && !(cctx_current->flags & CC_TRACE)
1650 && !force_cctx
1651 ))
1128 { 1652 {
1129 /* coroutine already started */ 1653 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1130 save_perl (aTHX_ prev); 1654 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1131 load_perl (aTHX_ next); 1655
1656 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1657 /* without this the next cctx_get might destroy the running cctx while still in use */
1658 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1659 if (ecb_expect_true (!next->cctx))
1660 next->cctx = cctx_get (aTHX);
1661
1662 cctx_put (cctx_current);
1132 } 1663 }
1664 else
1665 prev->cctx = cctx_current;
1133 1666
1134 prev__cctx = prev->cctx; 1667 ++next->usecount;
1135 1668
1136 /* possibly "free" the cctx */ 1669 cctx_prev = cctx_current;
1137 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))) 1670 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1671
1672 next->cctx = 0;
1673
1674 if (ecb_expect_false (cctx_prev != cctx_current))
1138 { 1675 {
1139 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1676 cctx_prev->top_env = PL_top_env;
1140 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1677 PL_top_env = cctx_current->top_env;
1141 1678 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1142 prev->cctx = 0;
1143
1144 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1145 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1146 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1147 if (!next->cctx)
1148 next->cctx = cctx_get (aTHX);
1149
1150 cctx_put (prev__cctx);
1151 } 1679 }
1152 1680
1153 ++next->usecount; 1681 transfer_tail (aTHX);
1154
1155 if (expect_true (!next->cctx))
1156 next->cctx = cctx_get (aTHX);
1157
1158 if (expect_false (prev__cctx != next->cctx))
1159 {
1160 prev__cctx->top_env = PL_top_env;
1161 PL_top_env = next->cctx->top_env;
1162 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1163 }
1164
1165 free_coro_mortal (aTHX);
1166 UNLOCK;
1167
1168 if (expect_false (prev->throw || next->throw))
1169 {
1170 struct coro *coro = SvSTATE (coro_current);
1171
1172 if (coro->throw)
1173 {
1174 SV *exception = coro->throw;
1175 coro->throw = 0;
1176 sv_setsv (ERRSV, exception);
1177 croak (0);
1178 }
1179 }
1180 } 1682 }
1181} 1683}
1182 1684
1183struct transfer_args
1184{
1185 struct coro *prev, *next;
1186};
1187
1188#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1685#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1189#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1686#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1190 1687
1191/** high level stuff ********************************************************/ 1688/** high level stuff ********************************************************/
1192 1689
1690/* this function is actually Coro, not Coro::State, but we call it from here */
1691/* because it is convenient - but it hasn't been declared yet for that reason */
1193static int 1692static void
1693coro_call_on_destroy (pTHX_ struct coro *coro);
1694
1695static void
1194coro_state_destroy (pTHX_ struct coro *coro) 1696coro_state_destroy (pTHX_ struct coro *coro)
1195{ 1697{
1196 if (coro->flags & CF_DESTROYED) 1698 if (coro->flags & CF_ZOMBIE)
1197 return 0; 1699 return;
1198 1700
1701 slf_destroy (aTHX_ coro);
1702
1199 coro->flags |= CF_DESTROYED; 1703 coro->flags |= CF_ZOMBIE;
1200 1704
1201 if (coro->flags & CF_READY) 1705 if (coro->flags & CF_READY)
1202 { 1706 {
1203 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1707 /* reduce nready, as destroying a ready coro effectively unreadies it */
1204 /* alternative: look through all ready queues and remove the coro */ 1708 /* alternative: look through all ready queues and remove the coro */
1205 LOCK;
1206 --coro_nready; 1709 --coro_nready;
1207 UNLOCK;
1208 } 1710 }
1209 else 1711 else
1210 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1712 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1211
1212 if (coro->mainstack && coro->mainstack != main_mainstack)
1213 {
1214 struct coro temp;
1215
1216 if (coro->flags & CF_RUNNING)
1217 croak ("FATAL: tried to destroy currently running coroutine");
1218
1219 save_perl (aTHX_ &temp);
1220 load_perl (aTHX_ coro);
1221
1222 coro_destroy (aTHX_ coro);
1223
1224 load_perl (aTHX_ &temp);
1225
1226 coro->slot = 0;
1227 }
1228
1229 cctx_destroy (coro->cctx);
1230 SvREFCNT_dec (coro->args);
1231 1713
1232 if (coro->next) coro->next->prev = coro->prev; 1714 if (coro->next) coro->next->prev = coro->prev;
1233 if (coro->prev) coro->prev->next = coro->next; 1715 if (coro->prev) coro->prev->next = coro->next;
1234 if (coro == coro_first) coro_first = coro->next; 1716 if (coro == coro_first) coro_first = coro->next;
1235 1717
1236 return 1; 1718 if (coro->mainstack
1719 && coro->mainstack != main_mainstack
1720 && coro->slot
1721 && !PL_dirty)
1722 destroy_perl (aTHX_ coro);
1723
1724 cctx_destroy (coro->cctx);
1725 SvREFCNT_dec (coro->startcv);
1726 SvREFCNT_dec (coro->args);
1727 SvREFCNT_dec (coro->swap_sv);
1728 SvREFCNT_dec (CORO_THROW);
1729
1730 coro_call_on_destroy (aTHX_ coro);
1731
1732 /* more destruction mayhem in coro_state_free */
1237} 1733}
1238 1734
1239static int 1735static int
1240coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1736coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1241{ 1737{
1242 struct coro *coro = (struct coro *)mg->mg_ptr; 1738 struct coro *coro = (struct coro *)mg->mg_ptr;
1243 mg->mg_ptr = 0; 1739 mg->mg_ptr = 0;
1244 1740
1245 coro->hv = 0;
1246
1247 if (--coro->refcnt < 0)
1248 {
1249 coro_state_destroy (aTHX_ coro); 1741 coro_state_destroy (aTHX_ coro);
1742 SvREFCNT_dec (coro->on_destroy);
1743 SvREFCNT_dec (coro->status);
1744
1250 Safefree (coro); 1745 Safefree (coro);
1251 }
1252 1746
1253 return 0; 1747 return 0;
1254} 1748}
1255 1749
1256static int 1750static int ecb_cold
1257coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1751coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1258{ 1752{
1259 struct coro *coro = (struct coro *)mg->mg_ptr; 1753 /* called when perl clones the current process the slow way (windows process emulation) */
1260 1754 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1261 ++coro->refcnt; 1755 mg->mg_ptr = 0;
1756 mg->mg_virtual = 0;
1262 1757
1263 return 0; 1758 return 0;
1264} 1759}
1265 1760
1266static MGVTBL coro_state_vtbl = { 1761static MGVTBL coro_state_vtbl = {
… …
1273# define MGf_DUP 0 1768# define MGf_DUP 0
1274#endif 1769#endif
1275}; 1770};
1276 1771
1277static void 1772static void
1278prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1773prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1279{ 1774{
1280 ta->prev = SvSTATE (prev_sv); 1775 ta->prev = SvSTATE (prev_sv);
1281 ta->next = SvSTATE (next_sv); 1776 ta->next = SvSTATE (next_sv);
1282 TRANSFER_CHECK (*ta); 1777 TRANSFER_CHECK (*ta);
1283} 1778}
1284 1779
1285static void 1780static void
1286api_transfer (SV *prev_sv, SV *next_sv) 1781api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1782{
1783 struct coro_transfer_args ta;
1784
1785 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1786 TRANSFER (ta, 1);
1787}
1788
1789/** Coro ********************************************************************/
1790
1791ECB_INLINE void
1792coro_enq (pTHX_ struct coro *coro)
1793{
1794 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1795
1796 SvREFCNT_inc_NN (coro->hv);
1797
1798 coro->next_ready = 0;
1799 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1800 ready [1] = coro;
1801}
1802
1803ECB_INLINE struct coro *
1804coro_deq (pTHX)
1805{
1806 int prio;
1807
1808 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1809 {
1810 struct coro **ready = coro_ready [prio];
1811
1812 if (ready [0])
1813 {
1814 struct coro *coro = ready [0];
1815 ready [0] = coro->next_ready;
1816 return coro;
1817 }
1818 }
1819
1820 return 0;
1821}
1822
1823static void
1824invoke_sv_ready_hook_helper (void)
1287{ 1825{
1288 dTHX; 1826 dTHX;
1289 struct transfer_args ta; 1827 dSP;
1290 1828
1291 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1829 ENTER;
1292 TRANSFER (ta); 1830 SAVETMPS;
1293}
1294 1831
1295/** Coro ********************************************************************/ 1832 PUSHMARK (SP);
1833 PUTBACK;
1834 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1296 1835
1297static void 1836 FREETMPS;
1298coro_enq (pTHX_ SV *coro_sv) 1837 LEAVE;
1299{
1300 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1301}
1302
1303static SV *
1304coro_deq (pTHX_ int min_prio)
1305{
1306 int prio = PRIO_MAX - PRIO_MIN;
1307
1308 min_prio -= PRIO_MIN;
1309 if (min_prio < 0)
1310 min_prio = 0;
1311
1312 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1313 if (AvFILLp (coro_ready [prio]) >= 0)
1314 return av_shift (coro_ready [prio]);
1315
1316 return 0;
1317} 1838}
1318 1839
1319static int 1840static int
1320api_ready (SV *coro_sv) 1841api_ready (pTHX_ SV *coro_sv)
1321{ 1842{
1322 dTHX;
1323 struct coro *coro;
1324
1325 if (SvROK (coro_sv))
1326 coro_sv = SvRV (coro_sv);
1327
1328 coro = SvSTATE (coro_sv); 1843 struct coro *coro = SvSTATE (coro_sv);
1329 1844
1330 if (coro->flags & CF_READY) 1845 if (coro->flags & CF_READY)
1331 return 0; 1846 return 0;
1332 1847
1333 coro->flags |= CF_READY; 1848 coro->flags |= CF_READY;
1334 1849
1335 LOCK; 1850 coro_enq (aTHX_ coro);
1336 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1851
1337 ++coro_nready; 1852 if (!coro_nready++)
1338 UNLOCK; 1853 if (coroapi.readyhook)
1854 coroapi.readyhook ();
1339 1855
1340 return 1; 1856 return 1;
1341} 1857}
1342 1858
1343static int 1859static int
1344api_is_ready (SV *coro_sv) 1860api_is_ready (pTHX_ SV *coro_sv)
1345{ 1861{
1346 dTHX;
1347 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1862 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1348} 1863}
1349 1864
1350static void 1865/* expects to own a reference to next->hv */
1866ECB_INLINE void
1351prepare_schedule (pTHX_ struct transfer_args *ta) 1867prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1352{ 1868{
1353 SV *prev_sv, *next_sv;
1354
1355 for (;;)
1356 {
1357 LOCK;
1358 next_sv = coro_deq (aTHX_ PRIO_MIN);
1359
1360 /* nothing to schedule: call the idle handler */
1361 if (expect_false (!next_sv))
1362 {
1363 dSP;
1364 UNLOCK;
1365
1366 ENTER;
1367 SAVETMPS;
1368
1369 PUSHMARK (SP);
1370 PUTBACK;
1371 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1372
1373 FREETMPS;
1374 LEAVE;
1375 continue;
1376 }
1377
1378 ta->next = SvSTATE (next_sv);
1379
1380 /* cannot transfer to destroyed coros, skip and look for next */
1381 if (expect_false (ta->next->flags & CF_DESTROYED))
1382 {
1383 UNLOCK;
1384 SvREFCNT_dec (next_sv);
1385 /* coro_nready is already taken care of by destroy */
1386 continue;
1387 }
1388
1389 --coro_nready;
1390 UNLOCK;
1391 break;
1392 }
1393
1394 /* free this only after the transfer */
1395 prev_sv = SvRV (coro_current); 1869 SV *prev_sv = SvRV (coro_current);
1870
1396 ta->prev = SvSTATE (prev_sv); 1871 ta->prev = SvSTATE_hv (prev_sv);
1872 ta->next = next;
1873
1397 TRANSFER_CHECK (*ta); 1874 TRANSFER_CHECK (*ta);
1398 assert (ta->next->flags & CF_READY); 1875
1399 ta->next->flags &= ~CF_READY;
1400 SvRV_set (coro_current, next_sv); 1876 SvRV_set (coro_current, (SV *)next->hv);
1401 1877
1402 LOCK;
1403 free_coro_mortal (aTHX); 1878 free_coro_mortal (aTHX);
1404 coro_mortal = prev_sv; 1879 coro_mortal = prev_sv;
1405 UNLOCK;
1406} 1880}
1407 1881
1408static void 1882static void
1883prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1884{
1885 for (;;)
1886 {
1887 struct coro *next = coro_deq (aTHX);
1888
1889 if (ecb_expect_true (next))
1890 {
1891 /* cannot transfer to destroyed coros, skip and look for next */
1892 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1893 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1894 else
1895 {
1896 next->flags &= ~CF_READY;
1897 --coro_nready;
1898
1899 prepare_schedule_to (aTHX_ ta, next);
1900 break;
1901 }
1902 }
1903 else
1904 {
1905 /* nothing to schedule: call the idle handler */
1906 if (SvROK (sv_idle)
1907 && SvOBJECT (SvRV (sv_idle)))
1908 {
1909 if (SvRV (sv_idle) == SvRV (coro_current))
1910 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1911
1912 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1913 api_ready (aTHX_ SvRV (sv_idle));
1914 --coro_nready;
1915 }
1916 else
1917 {
1918 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1919 dSP;
1920
1921 ENTER;
1922 SAVETMPS;
1923
1924 PUSHMARK (SP);
1925 PUTBACK;
1926 call_sv (sv_idle, G_VOID | G_DISCARD);
1927
1928 FREETMPS;
1929 LEAVE;
1930 }
1931 }
1932 }
1933}
1934
1935ECB_INLINE void
1409prepare_cede (pTHX_ struct transfer_args *ta) 1936prepare_cede (pTHX_ struct coro_transfer_args *ta)
1410{ 1937{
1411 api_ready (coro_current); 1938 api_ready (aTHX_ coro_current);
1412 prepare_schedule (aTHX_ ta); 1939 prepare_schedule (aTHX_ ta);
1413} 1940}
1414 1941
1942ECB_INLINE void
1943prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1944{
1945 SV *prev = SvRV (coro_current);
1946
1947 if (coro_nready)
1948 {
1949 prepare_schedule (aTHX_ ta);
1950 api_ready (aTHX_ prev);
1951 }
1952 else
1953 prepare_nop (aTHX_ ta);
1954}
1955
1956static void
1957api_schedule (pTHX)
1958{
1959 struct coro_transfer_args ta;
1960
1961 prepare_schedule (aTHX_ &ta);
1962 TRANSFER (ta, 1);
1963}
1964
1965static void
1966api_schedule_to (pTHX_ SV *coro_sv)
1967{
1968 struct coro_transfer_args ta;
1969 struct coro *next = SvSTATE (coro_sv);
1970
1971 SvREFCNT_inc_NN (coro_sv);
1972 prepare_schedule_to (aTHX_ &ta, next);
1973}
1974
1415static int 1975static int
1416prepare_cede_notself (pTHX_ struct transfer_args *ta) 1976api_cede (pTHX)
1417{ 1977{
1418 if (coro_nready) 1978 struct coro_transfer_args ta;
1419 { 1979
1420 SV *prev = SvRV (coro_current);
1421 prepare_schedule (aTHX_ ta); 1980 prepare_cede (aTHX_ &ta);
1422 api_ready (prev); 1981
1982 if (ecb_expect_true (ta.prev != ta.next))
1983 {
1984 TRANSFER (ta, 1);
1423 return 1; 1985 return 1;
1424 } 1986 }
1425 else 1987 else
1426 return 0; 1988 return 0;
1427} 1989}
1428 1990
1429static void
1430api_schedule (void)
1431{
1432 dTHX;
1433 struct transfer_args ta;
1434
1435 prepare_schedule (aTHX_ &ta);
1436 TRANSFER (ta);
1437}
1438
1439static int 1991static int
1440api_cede (void) 1992api_cede_notself (pTHX)
1441{ 1993{
1442 dTHX; 1994 if (coro_nready)
1995 {
1443 struct transfer_args ta; 1996 struct coro_transfer_args ta;
1444 1997
1445 prepare_cede (aTHX_ &ta); 1998 prepare_cede_notself (aTHX_ &ta);
1446
1447 if (expect_true (ta.prev != ta.next))
1448 {
1449 TRANSFER (ta); 1999 TRANSFER (ta, 1);
1450 return 1; 2000 return 1;
1451 } 2001 }
1452 else 2002 else
1453 return 0; 2003 return 0;
1454} 2004}
1455 2005
1456static int 2006static void
1457api_cede_notself (void)
1458{
1459 dTHX;
1460 struct transfer_args ta;
1461
1462 if (prepare_cede_notself (aTHX_ &ta))
1463 {
1464 TRANSFER (ta);
1465 return 1;
1466 }
1467 else
1468 return 0;
1469}
1470
1471static void
1472api_trace (SV *coro_sv, int flags) 2007api_trace (pTHX_ SV *coro_sv, int flags)
1473{ 2008{
1474 dTHX;
1475 struct coro *coro = SvSTATE (coro_sv); 2009 struct coro *coro = SvSTATE (coro_sv);
1476 2010
2011 if (coro->flags & CF_RUNNING)
2012 croak ("cannot enable tracing on a running coroutine, caught");
2013
1477 if (flags & CC_TRACE) 2014 if (flags & CC_TRACE)
1478 { 2015 {
1479 if (!coro->cctx) 2016 if (!coro->cctx)
1480 coro->cctx = cctx_new (); 2017 coro->cctx = cctx_new_run ();
1481 else if (!(coro->cctx->flags & CC_TRACE)) 2018 else if (!(coro->cctx->flags & CC_TRACE))
1482 croak ("cannot enable tracing on coroutine with custom stack"); 2019 croak ("cannot enable tracing on coroutine with custom stack, caught");
1483 2020
1484 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2021 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1485 } 2022 }
1486 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2023 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1487 { 2024 {
… …
1492 else 2029 else
1493 coro->slot->runops = RUNOPS_DEFAULT; 2030 coro->slot->runops = RUNOPS_DEFAULT;
1494 } 2031 }
1495} 2032}
1496 2033
2034static void
2035coro_push_av (pTHX_ AV *av, I32 gimme_v)
2036{
2037 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2038 {
2039 dSP;
2040
2041 if (gimme_v == G_SCALAR)
2042 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2043 else
2044 {
2045 int i;
2046 EXTEND (SP, AvFILLp (av) + 1);
2047
2048 for (i = 0; i <= AvFILLp (av); ++i)
2049 PUSHs (AvARRAY (av)[i]);
2050 }
2051
2052 PUTBACK;
2053 }
2054}
2055
2056static void
2057coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2058{
2059 if (!coro->on_destroy)
2060 coro->on_destroy = newAV ();
2061
2062 av_push (coro->on_destroy, cb);
2063}
2064
2065static void
2066slf_destroy_join (pTHX_ struct CoroSLF *frame)
2067{
2068 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2069}
2070
2071static int
2072slf_check_join (pTHX_ struct CoroSLF *frame)
2073{
2074 struct coro *coro = (struct coro *)frame->data;
2075
2076 if (!coro->status)
2077 return 1;
2078
2079 frame->destroy = 0;
2080
2081 coro_push_av (aTHX_ coro->status, GIMME_V);
2082
2083 SvREFCNT_dec ((SV *)coro->hv);
2084
2085 return 0;
2086}
2087
2088static void
2089slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2090{
2091 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2092
2093 if (items > 1)
2094 croak ("join called with too many arguments");
2095
2096 if (coro->status)
2097 frame->prepare = prepare_nop;
2098 else
2099 {
2100 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2101 frame->prepare = prepare_schedule;
2102 }
2103
2104 frame->check = slf_check_join;
2105 frame->destroy = slf_destroy_join;
2106 frame->data = (void *)coro;
2107 SvREFCNT_inc (coro->hv);
2108}
2109
2110static void
2111coro_call_on_destroy (pTHX_ struct coro *coro)
2112{
2113 AV *od = coro->on_destroy;
2114
2115 if (!od)
2116 return;
2117
2118 while (AvFILLp (od) >= 0)
2119 {
2120 SV *cb = sv_2mortal (av_pop (od));
2121
2122 /* coro hv's (and only hv's at the moment) are supported as well */
2123 if (SvSTATEhv_p (aTHX_ cb))
2124 api_ready (aTHX_ cb);
2125 else
2126 {
2127 dSP; /* don't disturb outer sp */
2128 PUSHMARK (SP);
2129
2130 if (coro->status)
2131 {
2132 PUTBACK;
2133 coro_push_av (aTHX_ coro->status, G_ARRAY);
2134 SPAGAIN;
2135 }
2136
2137 PUTBACK;
2138 call_sv (cb, G_VOID | G_DISCARD);
2139 }
2140 }
2141}
2142
2143static void
2144coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2145{
2146 AV *av;
2147
2148 if (coro->status)
2149 {
2150 av = coro->status;
2151 av_clear (av);
2152 }
2153 else
2154 av = coro->status = newAV ();
2155
2156 /* items are actually not so common, so optimise for this case */
2157 if (items)
2158 {
2159 int i;
2160
2161 av_extend (av, items - 1);
2162
2163 for (i = 0; i < items; ++i)
2164 av_push (av, SvREFCNT_inc_NN (arg [i]));
2165 }
2166}
2167
2168static void
2169slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2170{
2171 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2172 api_ready (aTHX_ sv_manager);
2173
2174 frame->prepare = prepare_schedule;
2175 frame->check = slf_check_repeat;
2176
2177 /* as a minor optimisation, we could unwind all stacks here */
2178 /* but that puts extra pressure on pp_slf, and is not worth much */
2179 /*coro_unwind_stacks (aTHX);*/
2180}
2181
2182static void
2183slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2184{
2185 HV *coro_hv = (HV *)SvRV (coro_current);
2186
2187 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2188 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2189}
2190
2191static void
2192slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2193{
2194 HV *coro_hv;
2195 struct coro *coro;
2196
2197 if (items <= 0)
2198 croak ("Coro::cancel called without coro object,");
2199
2200 coro = SvSTATE (arg [0]);
2201 coro_hv = coro->hv;
2202
2203 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2204
2205 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2206 {
2207 /* coro currently busy cancelling something, so just notify it */
2208 coro->slf_frame.data = (void *)coro;
2209
2210 frame->prepare = prepare_nop;
2211 frame->check = slf_check_nop;
2212 }
2213 else if (coro_hv == (HV *)SvRV (coro_current))
2214 {
2215 /* cancelling the current coro is allowed, and equals terminate */
2216 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2217 }
2218 else
2219 {
2220 struct coro *self = SvSTATE_current;
2221
2222 /* otherwise we cancel directly, purely for speed reasons
2223 * unfortunately, this requires some magic trickery, as
2224 * somebody else could cancel us, so we have to fight the cancellation.
2225 * this is ugly, and hopefully fully worth the extra speed.
2226 * besides, I can't get the slow-but-safe version working...
2227 */
2228 slf_frame.data = 0;
2229 self->flags |= CF_NOCANCEL;
2230 coro_state_destroy (aTHX_ coro);
2231 self->flags &= ~CF_NOCANCEL;
2232
2233 if (slf_frame.data)
2234 {
2235 /* while we were busy we have been cancelled, so terminate */
2236 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2237 }
2238 else
2239 {
2240 frame->prepare = prepare_nop;
2241 frame->check = slf_check_nop;
2242 }
2243 }
2244}
2245
2246static int
2247slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2248{
2249 frame->prepare = 0;
2250 coro_unwind_stacks (aTHX);
2251
2252 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2253
2254 return 1;
2255}
2256
2257static int
2258safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2259{
2260 if (coro->cctx)
2261 croak ("coro inside C callback, unable to cancel at this time, caught");
2262
2263 if (coro->flags & CF_NEW)
2264 {
2265 coro_set_status (aTHX_ coro, arg, items);
2266 coro_state_destroy (aTHX_ coro);
2267 }
2268 else
2269 {
2270 if (!coro->slf_frame.prepare)
2271 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2272
2273 slf_destroy (aTHX_ coro);
2274
2275 coro_set_status (aTHX_ coro, arg, items);
2276 coro->slf_frame.prepare = prepare_nop;
2277 coro->slf_frame.check = slf_check_safe_cancel;
2278
2279 api_ready (aTHX_ (SV *)coro->hv);
2280 }
2281
2282 return 1;
2283}
2284
2285/*****************************************************************************/
2286/* async pool handler */
2287
2288static int
2289slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2290{
2291 HV *hv = (HV *)SvRV (coro_current);
2292 struct coro *coro = (struct coro *)frame->data;
2293
2294 if (!coro->invoke_cb)
2295 return 1; /* loop till we have invoke */
2296 else
2297 {
2298 hv_store (hv, "desc", sizeof ("desc") - 1,
2299 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2300
2301 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2302
2303 {
2304 dSP;
2305 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2306 PUTBACK;
2307 }
2308
2309 SvREFCNT_dec (GvAV (PL_defgv));
2310 GvAV (PL_defgv) = coro->invoke_av;
2311 coro->invoke_av = 0;
2312
2313 return 0;
2314 }
2315}
2316
2317static void
2318slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2319{
2320 HV *hv = (HV *)SvRV (coro_current);
2321 struct coro *coro = SvSTATE_hv ((SV *)hv);
2322
2323 if (ecb_expect_true (coro->saved_deffh))
2324 {
2325 /* subsequent iteration */
2326 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2327 coro->saved_deffh = 0;
2328
2329 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2330 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2331 {
2332 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2333 return;
2334 }
2335 else
2336 {
2337 av_clear (GvAV (PL_defgv));
2338 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2339
2340 coro->prio = 0;
2341
2342 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2343 api_trace (aTHX_ coro_current, 0);
2344
2345 frame->prepare = prepare_schedule;
2346 av_push (av_async_pool, SvREFCNT_inc (hv));
2347 }
2348 }
2349 else
2350 {
2351 /* first iteration, simply fall through */
2352 frame->prepare = prepare_nop;
2353 }
2354
2355 frame->check = slf_check_pool_handler;
2356 frame->data = (void *)coro;
2357}
2358
2359/*****************************************************************************/
2360/* rouse callback */
2361
2362#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2363
2364static void
2365coro_rouse_callback (pTHX_ CV *cv)
2366{
2367 dXSARGS;
2368 SV *data = (SV *)S_GENSUB_ARG;
2369
2370 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2371 {
2372 /* first call, set args */
2373 SV *coro = SvRV (data);
2374 AV *av = newAV ();
2375
2376 SvRV_set (data, (SV *)av);
2377
2378 /* better take a full copy of the arguments */
2379 while (items--)
2380 av_store (av, items, newSVsv (ST (items)));
2381
2382 api_ready (aTHX_ coro);
2383 SvREFCNT_dec (coro);
2384 }
2385
2386 XSRETURN_EMPTY;
2387}
2388
2389static int
2390slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2391{
2392 SV *data = (SV *)frame->data;
2393
2394 if (CORO_THROW)
2395 return 0;
2396
2397 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2398 return 1;
2399
2400 /* now push all results on the stack */
2401 {
2402 dSP;
2403 AV *av = (AV *)SvRV (data);
2404 int i;
2405
2406 EXTEND (SP, AvFILLp (av) + 1);
2407 for (i = 0; i <= AvFILLp (av); ++i)
2408 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2409
2410 /* we have stolen the elements, so set length to zero and free */
2411 AvFILLp (av) = -1;
2412 av_undef (av);
2413
2414 PUTBACK;
2415 }
2416
2417 return 0;
2418}
2419
2420static void
2421slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2422{
2423 SV *cb;
2424
2425 if (items)
2426 cb = arg [0];
2427 else
2428 {
2429 struct coro *coro = SvSTATE_current;
2430
2431 if (!coro->rouse_cb)
2432 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2433
2434 cb = sv_2mortal (coro->rouse_cb);
2435 coro->rouse_cb = 0;
2436 }
2437
2438 if (!SvROK (cb)
2439 || SvTYPE (SvRV (cb)) != SVt_PVCV
2440 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2441 croak ("Coro::rouse_wait called with illegal callback argument,");
2442
2443 {
2444 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2445 SV *data = (SV *)S_GENSUB_ARG;
2446
2447 frame->data = (void *)data;
2448 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2449 frame->check = slf_check_rouse_wait;
2450 }
2451}
2452
2453static SV *
2454coro_new_rouse_cb (pTHX)
2455{
2456 HV *hv = (HV *)SvRV (coro_current);
2457 struct coro *coro = SvSTATE_hv (hv);
2458 SV *data = newRV_inc ((SV *)hv);
2459 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2460
2461 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2462 SvREFCNT_dec (data); /* magicext increases the refcount */
2463
2464 SvREFCNT_dec (coro->rouse_cb);
2465 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2466
2467 return cb;
2468}
2469
2470/*****************************************************************************/
2471/* schedule-like-function opcode (SLF) */
2472
2473static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2474static const CV *slf_cv;
2475static SV **slf_argv;
2476static int slf_argc, slf_arga; /* count, allocated */
2477static I32 slf_ax; /* top of stack, for restore */
2478
2479/* this restores the stack in the case we patched the entersub, to */
2480/* recreate the stack frame as perl will on following calls */
2481/* since entersub cleared the stack */
2482static OP *
2483pp_restore (pTHX)
2484{
2485 int i;
2486 SV **SP = PL_stack_base + slf_ax;
2487
2488 PUSHMARK (SP);
2489
2490 EXTEND (SP, slf_argc + 1);
2491
2492 for (i = 0; i < slf_argc; ++i)
2493 PUSHs (sv_2mortal (slf_argv [i]));
2494
2495 PUSHs ((SV *)CvGV (slf_cv));
2496
2497 RETURNOP (slf_restore.op_first);
2498}
2499
2500static void
2501slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2502{
2503 SV **arg = (SV **)slf_frame.data;
2504
2505 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2506}
2507
2508static void
2509slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2510{
2511 if (items != 2)
2512 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2513
2514 frame->prepare = slf_prepare_transfer;
2515 frame->check = slf_check_nop;
2516 frame->data = (void *)arg; /* let's hope it will stay valid */
2517}
2518
2519static void
2520slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2521{
2522 frame->prepare = prepare_schedule;
2523 frame->check = slf_check_nop;
2524}
2525
2526static void
2527slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2528{
2529 struct coro *next = (struct coro *)slf_frame.data;
2530
2531 SvREFCNT_inc_NN (next->hv);
2532 prepare_schedule_to (aTHX_ ta, next);
2533}
2534
2535static void
2536slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2537{
2538 if (!items)
2539 croak ("Coro::schedule_to expects a coroutine argument, caught");
2540
2541 frame->data = (void *)SvSTATE (arg [0]);
2542 frame->prepare = slf_prepare_schedule_to;
2543 frame->check = slf_check_nop;
2544}
2545
2546static void
2547slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2548{
2549 api_ready (aTHX_ SvRV (coro_current));
2550
2551 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2552}
2553
2554static void
2555slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2556{
2557 frame->prepare = prepare_cede;
2558 frame->check = slf_check_nop;
2559}
2560
2561static void
2562slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2563{
2564 frame->prepare = prepare_cede_notself;
2565 frame->check = slf_check_nop;
2566}
2567
2568/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2569static void
2570slf_destroy (pTHX_ struct coro *coro)
2571{
2572 /* this callback is reserved for slf functions needing to do cleanup */
2573 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2574 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2575
2576 /*
2577 * The on_destroy above most likely is from an SLF call.
2578 * Since by definition the SLF call will not finish when we destroy
2579 * the coro, we will have to force-finish it here, otherwise
2580 * cleanup functions cannot call SLF functions.
2581 */
2582 coro->slf_frame.prepare = 0;
2583}
2584
2585/*
2586 * these not obviously related functions are all rolled into one
2587 * function to increase chances that they all will call transfer with the same
2588 * stack offset
2589 * SLF stands for "schedule-like-function".
2590 */
2591static OP *
2592pp_slf (pTHX)
2593{
2594 I32 checkmark; /* mark SP to see how many elements check has pushed */
2595
2596 /* set up the slf frame, unless it has already been set-up */
2597 /* the latter happens when a new coro has been started */
2598 /* or when a new cctx was attached to an existing coroutine */
2599 if (ecb_expect_true (!slf_frame.prepare))
2600 {
2601 /* first iteration */
2602 dSP;
2603 SV **arg = PL_stack_base + TOPMARK + 1;
2604 int items = SP - arg; /* args without function object */
2605 SV *gv = *sp;
2606
2607 /* do a quick consistency check on the "function" object, and if it isn't */
2608 /* for us, divert to the real entersub */
2609 if (SvTYPE (gv) != SVt_PVGV
2610 || !GvCV (gv)
2611 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2612 return PL_ppaddr[OP_ENTERSUB](aTHX);
2613
2614 if (!(PL_op->op_flags & OPf_STACKED))
2615 {
2616 /* ampersand-form of call, use @_ instead of stack */
2617 AV *av = GvAV (PL_defgv);
2618 arg = AvARRAY (av);
2619 items = AvFILLp (av) + 1;
2620 }
2621
2622 /* now call the init function, which needs to set up slf_frame */
2623 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2624 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2625
2626 /* pop args */
2627 SP = PL_stack_base + POPMARK;
2628
2629 PUTBACK;
2630 }
2631
2632 /* now that we have a slf_frame, interpret it! */
2633 /* we use a callback system not to make the code needlessly */
2634 /* complicated, but so we can run multiple perl coros from one cctx */
2635
2636 do
2637 {
2638 struct coro_transfer_args ta;
2639
2640 slf_frame.prepare (aTHX_ &ta);
2641 TRANSFER (ta, 0);
2642
2643 checkmark = PL_stack_sp - PL_stack_base;
2644 }
2645 while (slf_frame.check (aTHX_ &slf_frame));
2646
2647 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2648
2649 /* exception handling */
2650 if (ecb_expect_false (CORO_THROW))
2651 {
2652 SV *exception = sv_2mortal (CORO_THROW);
2653
2654 CORO_THROW = 0;
2655 sv_setsv (ERRSV, exception);
2656 croak (0);
2657 }
2658
2659 /* return value handling - mostly like entersub */
2660 /* make sure we put something on the stack in scalar context */
2661 if (GIMME_V == G_SCALAR
2662 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2663 {
2664 dSP;
2665 SV **bot = PL_stack_base + checkmark;
2666
2667 if (sp == bot) /* too few, push undef */
2668 bot [1] = &PL_sv_undef;
2669 else /* too many, take last one */
2670 bot [1] = *sp;
2671
2672 SP = bot + 1;
2673
2674 PUTBACK;
2675 }
2676
2677 return NORMAL;
2678}
2679
2680static void
2681api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2682{
2683 int i;
2684 SV **arg = PL_stack_base + ax;
2685 int items = PL_stack_sp - arg + 1;
2686
2687 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2688
2689 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2690 && PL_op->op_ppaddr != pp_slf)
2691 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2692
2693 CvFLAGS (cv) |= CVf_SLF;
2694 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2695 slf_cv = cv;
2696
2697 /* we patch the op, and then re-run the whole call */
2698 /* we have to put the same argument on the stack for this to work */
2699 /* and this will be done by pp_restore */
2700 slf_restore.op_next = (OP *)&slf_restore;
2701 slf_restore.op_type = OP_CUSTOM;
2702 slf_restore.op_ppaddr = pp_restore;
2703 slf_restore.op_first = PL_op;
2704
2705 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2706
2707 if (PL_op->op_flags & OPf_STACKED)
2708 {
2709 if (items > slf_arga)
2710 {
2711 slf_arga = items;
2712 Safefree (slf_argv);
2713 New (0, slf_argv, slf_arga, SV *);
2714 }
2715
2716 slf_argc = items;
2717
2718 for (i = 0; i < items; ++i)
2719 slf_argv [i] = SvREFCNT_inc (arg [i]);
2720 }
2721 else
2722 slf_argc = 0;
2723
2724 PL_op->op_ppaddr = pp_slf;
2725 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2726
2727 PL_op = (OP *)&slf_restore;
2728}
2729
2730/*****************************************************************************/
2731/* dynamic wind */
2732
2733static void
2734on_enterleave_call (pTHX_ SV *cb)
2735{
2736 dSP;
2737
2738 PUSHSTACK;
2739
2740 PUSHMARK (SP);
2741 PUTBACK;
2742 call_sv (cb, G_VOID | G_DISCARD);
2743 SPAGAIN;
2744
2745 POPSTACK;
2746}
2747
2748static SV *
2749coro_avp_pop_and_free (pTHX_ AV **avp)
2750{
2751 AV *av = *avp;
2752 SV *res = av_pop (av);
2753
2754 if (AvFILLp (av) < 0)
2755 {
2756 *avp = 0;
2757 SvREFCNT_dec (av);
2758 }
2759
2760 return res;
2761}
2762
2763static void
2764coro_pop_on_enter (pTHX_ void *coro)
2765{
2766 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2767 SvREFCNT_dec (cb);
2768}
2769
2770static void
2771coro_pop_on_leave (pTHX_ void *coro)
2772{
2773 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2774 on_enterleave_call (aTHX_ sv_2mortal (cb));
2775}
2776
2777/*****************************************************************************/
2778/* PerlIO::cede */
2779
2780typedef struct
2781{
2782 PerlIOBuf base;
2783 NV next, every;
2784} PerlIOCede;
2785
2786static IV ecb_cold
2787PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2788{
2789 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2790
2791 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2792 self->next = nvtime () + self->every;
2793
2794 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2795}
2796
2797static SV * ecb_cold
2798PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2799{
2800 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2801
2802 return newSVnv (self->every);
2803}
2804
2805static IV
2806PerlIOCede_flush (pTHX_ PerlIO *f)
2807{
2808 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2809 double now = nvtime ();
2810
2811 if (now >= self->next)
2812 {
2813 api_cede (aTHX);
2814 self->next = now + self->every;
2815 }
2816
2817 return PerlIOBuf_flush (aTHX_ f);
2818}
2819
2820static PerlIO_funcs PerlIO_cede =
2821{
2822 sizeof(PerlIO_funcs),
2823 "cede",
2824 sizeof(PerlIOCede),
2825 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2826 PerlIOCede_pushed,
2827 PerlIOBuf_popped,
2828 PerlIOBuf_open,
2829 PerlIOBase_binmode,
2830 PerlIOCede_getarg,
2831 PerlIOBase_fileno,
2832 PerlIOBuf_dup,
2833 PerlIOBuf_read,
2834 PerlIOBuf_unread,
2835 PerlIOBuf_write,
2836 PerlIOBuf_seek,
2837 PerlIOBuf_tell,
2838 PerlIOBuf_close,
2839 PerlIOCede_flush,
2840 PerlIOBuf_fill,
2841 PerlIOBase_eof,
2842 PerlIOBase_error,
2843 PerlIOBase_clearerr,
2844 PerlIOBase_setlinebuf,
2845 PerlIOBuf_get_base,
2846 PerlIOBuf_bufsiz,
2847 PerlIOBuf_get_ptr,
2848 PerlIOBuf_get_cnt,
2849 PerlIOBuf_set_ptrcnt,
2850};
2851
2852/*****************************************************************************/
2853/* Coro::Semaphore & Coro::Signal */
2854
2855static SV *
2856coro_waitarray_new (pTHX_ int count)
2857{
2858 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2859 AV *av = newAV ();
2860 SV **ary;
2861
2862 /* unfortunately, building manually saves memory */
2863 Newx (ary, 2, SV *);
2864 AvALLOC (av) = ary;
2865#if PERL_VERSION_ATLEAST (5,10,0)
2866 AvARRAY (av) = ary;
2867#else
2868 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2869 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2870 SvPVX ((SV *)av) = (char *)ary;
2871#endif
2872 AvMAX (av) = 1;
2873 AvFILLp (av) = 0;
2874 ary [0] = newSViv (count);
2875
2876 return newRV_noinc ((SV *)av);
2877}
2878
2879/* semaphore */
2880
2881static void
2882coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2883{
2884 SV *count_sv = AvARRAY (av)[0];
2885 IV count = SvIVX (count_sv);
2886
2887 count += adjust;
2888 SvIVX (count_sv) = count;
2889
2890 /* now wake up as many waiters as are expected to lock */
2891 while (count > 0 && AvFILLp (av) > 0)
2892 {
2893 SV *cb;
2894
2895 /* swap first two elements so we can shift a waiter */
2896 AvARRAY (av)[0] = AvARRAY (av)[1];
2897 AvARRAY (av)[1] = count_sv;
2898 cb = av_shift (av);
2899
2900 if (SvOBJECT (cb))
2901 {
2902 api_ready (aTHX_ cb);
2903 --count;
2904 }
2905 else if (SvTYPE (cb) == SVt_PVCV)
2906 {
2907 dSP;
2908 PUSHMARK (SP);
2909 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2910 PUTBACK;
2911 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2912 }
2913
2914 SvREFCNT_dec (cb);
2915 }
2916}
2917
2918static void
2919coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2920{
2921 /* call $sem->adjust (0) to possibly wake up some other waiters */
2922 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2923}
2924
2925static int
2926slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2927{
2928 AV *av = (AV *)frame->data;
2929 SV *count_sv = AvARRAY (av)[0];
2930 SV *coro_hv = SvRV (coro_current);
2931
2932 /* if we are about to throw, don't actually acquire the lock, just throw */
2933 if (CORO_THROW)
2934 return 0;
2935 else if (SvIVX (count_sv) > 0)
2936 {
2937 frame->destroy = 0;
2938
2939 if (acquire)
2940 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2941 else
2942 coro_semaphore_adjust (aTHX_ av, 0);
2943
2944 return 0;
2945 }
2946 else
2947 {
2948 int i;
2949 /* if we were woken up but can't down, we look through the whole */
2950 /* waiters list and only add us if we aren't in there already */
2951 /* this avoids some degenerate memory usage cases */
2952 for (i = AvFILLp (av); i > 0; --i) // i > 0 is not an off-by-one bug
2953 if (AvARRAY (av)[i] == coro_hv)
2954 return 1;
2955
2956 av_push (av, SvREFCNT_inc (coro_hv));
2957 return 1;
2958 }
2959}
2960
2961static int
2962slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2963{
2964 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2965}
2966
2967static int
2968slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2969{
2970 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2971}
2972
2973static void
2974slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2975{
2976 AV *av = (AV *)SvRV (arg [0]);
2977
2978 if (SvIVX (AvARRAY (av)[0]) > 0)
2979 {
2980 frame->data = (void *)av;
2981 frame->prepare = prepare_nop;
2982 }
2983 else
2984 {
2985 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2986
2987 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2988 frame->prepare = prepare_schedule;
2989 /* to avoid race conditions when a woken-up coro gets terminated */
2990 /* we arrange for a temporary on_destroy that calls adjust (0) */
2991 frame->destroy = coro_semaphore_destroy;
2992 }
2993}
2994
2995static void
2996slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2997{
2998 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2999 frame->check = slf_check_semaphore_down;
3000}
3001
3002static void
3003slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3004{
3005 if (items >= 2)
3006 {
3007 /* callback form */
3008 AV *av = (AV *)SvRV (arg [0]);
3009 SV *cb_cv = s_get_cv_croak (arg [1]);
3010
3011 av_push (av, SvREFCNT_inc_NN (cb_cv));
3012
3013 if (SvIVX (AvARRAY (av)[0]) > 0)
3014 coro_semaphore_adjust (aTHX_ av, 0);
3015
3016 frame->prepare = prepare_nop;
3017 frame->check = slf_check_nop;
3018 }
3019 else
3020 {
3021 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3022 frame->check = slf_check_semaphore_wait;
3023 }
3024}
3025
3026/* signal */
3027
3028static void
3029coro_signal_wake (pTHX_ AV *av, int count)
3030{
3031 SvIVX (AvARRAY (av)[0]) = 0;
3032
3033 /* now signal count waiters */
3034 while (count > 0 && AvFILLp (av) > 0)
3035 {
3036 SV *cb;
3037
3038 /* swap first two elements so we can shift a waiter */
3039 cb = AvARRAY (av)[0];
3040 AvARRAY (av)[0] = AvARRAY (av)[1];
3041 AvARRAY (av)[1] = cb;
3042
3043 cb = av_shift (av);
3044
3045 if (SvTYPE (cb) == SVt_PVCV)
3046 {
3047 dSP;
3048 PUSHMARK (SP);
3049 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3050 PUTBACK;
3051 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3052 }
3053 else
3054 {
3055 api_ready (aTHX_ cb);
3056 sv_setiv (cb, 0); /* signal waiter */
3057 }
3058
3059 SvREFCNT_dec (cb);
3060
3061 --count;
3062 }
3063}
3064
3065static int
3066slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3067{
3068 /* if we are about to throw, also stop waiting */
3069 return SvROK ((SV *)frame->data) && !CORO_THROW;
3070}
3071
3072static void
3073slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3074{
3075 AV *av = (AV *)SvRV (arg [0]);
3076
3077 if (items >= 2)
3078 {
3079 SV *cb_cv = s_get_cv_croak (arg [1]);
3080 av_push (av, SvREFCNT_inc_NN (cb_cv));
3081
3082 if (SvIVX (AvARRAY (av)[0]))
3083 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3084
3085 frame->prepare = prepare_nop;
3086 frame->check = slf_check_nop;
3087 }
3088 else if (SvIVX (AvARRAY (av)[0]))
3089 {
3090 SvIVX (AvARRAY (av)[0]) = 0;
3091 frame->prepare = prepare_nop;
3092 frame->check = slf_check_nop;
3093 }
3094 else
3095 {
3096 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3097
3098 av_push (av, waiter);
3099
3100 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3101 frame->prepare = prepare_schedule;
3102 frame->check = slf_check_signal_wait;
3103 }
3104}
3105
3106/*****************************************************************************/
3107/* Coro::AIO */
3108
3109#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3110
3111/* helper storage struct */
3112struct io_state
3113{
3114 int errorno;
3115 I32 laststype; /* U16 in 5.10.0 */
3116 int laststatval;
3117 Stat_t statcache;
3118};
3119
3120static void
3121coro_aio_callback (pTHX_ CV *cv)
3122{
3123 dXSARGS;
3124 AV *state = (AV *)S_GENSUB_ARG;
3125 SV *coro = av_pop (state);
3126 SV *data_sv = newSV (sizeof (struct io_state));
3127
3128 av_extend (state, items - 1);
3129
3130 sv_upgrade (data_sv, SVt_PV);
3131 SvCUR_set (data_sv, sizeof (struct io_state));
3132 SvPOK_only (data_sv);
3133
3134 {
3135 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3136
3137 data->errorno = errno;
3138 data->laststype = PL_laststype;
3139 data->laststatval = PL_laststatval;
3140 data->statcache = PL_statcache;
3141 }
3142
3143 /* now build the result vector out of all the parameters and the data_sv */
3144 {
3145 int i;
3146
3147 for (i = 0; i < items; ++i)
3148 av_push (state, SvREFCNT_inc_NN (ST (i)));
3149 }
3150
3151 av_push (state, data_sv);
3152
3153 api_ready (aTHX_ coro);
3154 SvREFCNT_dec (coro);
3155 SvREFCNT_dec ((AV *)state);
3156}
3157
3158static int
3159slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3160{
3161 AV *state = (AV *)frame->data;
3162
3163 /* if we are about to throw, return early */
3164 /* this does not cancel the aio request, but at least */
3165 /* it quickly returns */
3166 if (CORO_THROW)
3167 return 0;
3168
3169 /* one element that is an RV? repeat! */
3170 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3171 return 1;
3172
3173 /* restore status */
3174 {
3175 SV *data_sv = av_pop (state);
3176 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3177
3178 errno = data->errorno;
3179 PL_laststype = data->laststype;
3180 PL_laststatval = data->laststatval;
3181 PL_statcache = data->statcache;
3182
3183 SvREFCNT_dec (data_sv);
3184 }
3185
3186 /* push result values */
3187 {
3188 dSP;
3189 int i;
3190
3191 EXTEND (SP, AvFILLp (state) + 1);
3192 for (i = 0; i <= AvFILLp (state); ++i)
3193 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3194
3195 PUTBACK;
3196 }
3197
3198 return 0;
3199}
3200
3201static void
3202slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3203{
3204 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3205 SV *coro_hv = SvRV (coro_current);
3206 struct coro *coro = SvSTATE_hv (coro_hv);
3207
3208 /* put our coroutine id on the state arg */
3209 av_push (state, SvREFCNT_inc_NN (coro_hv));
3210
3211 /* first see whether we have a non-zero priority and set it as AIO prio */
3212 if (coro->prio)
3213 {
3214 dSP;
3215
3216 static SV *prio_cv;
3217 static SV *prio_sv;
3218
3219 if (ecb_expect_false (!prio_cv))
3220 {
3221 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3222 prio_sv = newSViv (0);
3223 }
3224
3225 PUSHMARK (SP);
3226 sv_setiv (prio_sv, coro->prio);
3227 XPUSHs (prio_sv);
3228
3229 PUTBACK;
3230 call_sv (prio_cv, G_VOID | G_DISCARD);
3231 }
3232
3233 /* now call the original request */
3234 {
3235 dSP;
3236 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3237 int i;
3238
3239 PUSHMARK (SP);
3240
3241 /* first push all args to the stack */
3242 EXTEND (SP, items + 1);
3243
3244 for (i = 0; i < items; ++i)
3245 PUSHs (arg [i]);
3246
3247 /* now push the callback closure */
3248 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3249
3250 /* now call the AIO function - we assume our request is uncancelable */
3251 PUTBACK;
3252 call_sv ((SV *)req, G_VOID | G_DISCARD);
3253 }
3254
3255 /* now that the request is going, we loop till we have a result */
3256 frame->data = (void *)state;
3257 frame->prepare = prepare_schedule;
3258 frame->check = slf_check_aio_req;
3259}
3260
3261static void
3262coro_aio_req_xs (pTHX_ CV *cv)
3263{
3264 dXSARGS;
3265
3266 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3267
3268 XSRETURN_EMPTY;
3269}
3270
3271/*****************************************************************************/
3272
3273#if CORO_CLONE
3274# include "clone.c"
3275#endif
3276
3277/*****************************************************************************/
3278
3279static SV *
3280coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3281{
3282 SV *coro_sv;
3283 struct coro *coro;
3284 MAGIC *mg;
3285 HV *hv;
3286 SV *cb;
3287 int i;
3288
3289 if (argc > 0)
3290 {
3291 cb = s_get_cv_croak (argv [0]);
3292
3293 if (!is_coro)
3294 {
3295 if (CvISXSUB (cb))
3296 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3297
3298 if (!CvROOT (cb))
3299 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3300 }
3301 }
3302
3303 Newz (0, coro, 1, struct coro);
3304 coro->args = newAV ();
3305 coro->flags = CF_NEW;
3306
3307 if (coro_first) coro_first->prev = coro;
3308 coro->next = coro_first;
3309 coro_first = coro;
3310
3311 coro->hv = hv = newHV ();
3312 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3313 mg->mg_flags |= MGf_DUP;
3314 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3315
3316 if (argc > 0)
3317 {
3318 av_extend (coro->args, argc + is_coro - 1);
3319
3320 if (is_coro)
3321 {
3322 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3323 cb = (SV *)cv_coro_run;
3324 }
3325
3326 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3327
3328 for (i = 1; i < argc; i++)
3329 av_push (coro->args, newSVsv (argv [i]));
3330 }
3331
3332 return coro_sv;
3333}
3334
3335#ifndef __cplusplus
3336ecb_cold XS(boot_Coro__State);
3337#endif
3338
3339#if CORO_JIT
3340
3341static void ecb_noinline ecb_cold
3342pushav_3uv (pTHX_ UV a, UV b, UV c)
3343{
3344 dSP;
3345 AV *av = newAV ();
3346
3347 av_store (av, 2, newSVuv (c));
3348 av_store (av, 1, newSVuv (b));
3349 av_store (av, 0, newSVuv (a));
3350
3351 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3352
3353 PUTBACK;
3354}
3355
3356static void ecb_noinline ecb_cold
3357jit_init (pTHX)
3358{
3359 dSP;
3360 SV *load, *save;
3361 char *map_base;
3362 char *load_ptr, *save_ptr;
3363 STRLEN load_len, save_len;
3364 int count;
3365
3366 PUSHMARK (SP);
3367 PUTBACK;
3368#define VARx(name,expr,type) pushav_3uv (aTHX_ (UV)&(expr), offsetof (perl_slots, name), sizeof (type));
3369# include "state.h"
3370#undef VARx
3371 count = call_pv ("Coro::State::_jit", G_ARRAY);
3372 SPAGAIN;
3373
3374 save = POPs; save_ptr = SvPVbyte (save, save_len);
3375 load = POPs; load_ptr = SvPVbyte (load, load_len);
3376
3377 map_base = mmap (0, load_len + save_len + 16, PROT_EXEC | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3378
3379 assert (("Coro: unable mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3380
3381 load_perl_slots = (load_save_perl_slots_type)map_base;
3382 memcpy (map_base, load_ptr, load_len);
3383
3384 map_base += (load_len + 15) & ~15;
3385
3386 save_perl_slots = (load_save_perl_slots_type)map_base;
3387 memcpy (map_base, save_ptr, save_len);
3388}
3389
3390#endif
3391
1497MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3392MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1498 3393
1499PROTOTYPES: DISABLE 3394PROTOTYPES: DISABLE
1500 3395
1501BOOT: 3396BOOT:
1502{ 3397{
1503#ifdef USE_ITHREADS 3398#ifdef USE_ITHREADS
1504 MUTEX_INIT (&coro_mutex); 3399# if CORO_PTHREAD
3400 coro_thx = PERL_GET_CONTEXT;
3401# endif
1505#endif 3402#endif
1506 BOOT_PAGESIZE; 3403 BOOT_PAGESIZE;
1507 3404
3405 /* perl defines these to check for existance first, but why it doesn't */
3406 /* just create them one at init time is not clear to me, except for */
3407 /* programs trying to delete them, but... */
3408 /* anyway, we declare this as invalid and make sure they are initialised here */
3409 DEFSV;
3410 ERRSV;
3411
3412 cctx_current = cctx_new_empty ();
3413
1508 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3414 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1509 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3415 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1510 3416
3417 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3418 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3419 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3420
1511 hv_sig = coro_get_hv ("SIG", TRUE); 3421 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1512 sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE); 3422 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1513 sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE); 3423 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1514
1515 if (!PL_diehook ) hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0);
1516 if (!PL_warnhook) hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0);
1517 3424
1518 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3425 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1519 3426
1520 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3427 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1521 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3428 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1526 main_top_env = PL_top_env; 3433 main_top_env = PL_top_env;
1527 3434
1528 while (main_top_env->je_prev) 3435 while (main_top_env->je_prev)
1529 main_top_env = main_top_env->je_prev; 3436 main_top_env = main_top_env->je_prev;
1530 3437
3438 {
3439 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3440
3441 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3442 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3443
3444 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3445 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3446 }
3447
1531 coroapi.ver = CORO_API_VERSION; 3448 coroapi.ver = CORO_API_VERSION;
1532 coroapi.rev = CORO_API_REVISION; 3449 coroapi.rev = CORO_API_REVISION;
3450
1533 coroapi.transfer = api_transfer; 3451 coroapi.transfer = api_transfer;
1534 3452
3453 coroapi.sv_state = SvSTATE_;
3454 coroapi.execute_slf = api_execute_slf;
3455 coroapi.prepare_nop = prepare_nop;
3456 coroapi.prepare_schedule = prepare_schedule;
3457 coroapi.prepare_cede = prepare_cede;
3458 coroapi.prepare_cede_notself = prepare_cede_notself;
3459
3460 time_init (aTHX);
3461
1535 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3462 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3463#if CORO_JIT
3464 PUTBACK;
3465 require_pv ("Coro/jit-" CORO_JIT_TYPE ".pl");
3466 jit_init (aTHX);
3467 perl_eval_pv ("undef &Coro::State::_jit", 1);
3468 SPAGAIN;
3469#endif
1536} 3470}
1537 3471
1538SV * 3472SV *
1539new (char *klass, ...) 3473new (SV *klass, ...)
3474 ALIAS:
3475 Coro::new = 1
1540 CODE: 3476 CODE:
1541{ 3477 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1542 struct coro *coro;
1543 HV *hv;
1544 int i;
1545
1546 Newz (0, coro, 1, struct coro);
1547 coro->args = newAV ();
1548 coro->flags = CF_NEW;
1549
1550 if (coro_first) coro_first->prev = coro;
1551 coro->next = coro_first;
1552 coro_first = coro;
1553
1554 coro->hv = hv = newHV ();
1555 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1556 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1557
1558 av_extend (coro->args, items - 1);
1559 for (i = 1; i < items; i++)
1560 av_push (coro->args, newSVsv (ST (i)));
1561}
1562 OUTPUT:
1563 RETVAL
1564
1565# these not obviously related functions are all rolled into the same xs
1566# function to increase chances that they all will call transfer with the same
1567# stack offset
1568void
1569_set_stacklevel (...)
1570 ALIAS:
1571 Coro::State::transfer = 1
1572 Coro::schedule = 2
1573 Coro::cede = 3
1574 Coro::cede_notself = 4
1575 CODE:
1576{
1577 struct transfer_args ta;
1578
1579 switch (ix)
1580 {
1581 case 0:
1582 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1583 ta.next = 0;
1584 break;
1585
1586 case 1:
1587 if (items != 2)
1588 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1589
1590 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1591 break;
1592
1593 case 2:
1594 prepare_schedule (aTHX_ &ta);
1595 break;
1596
1597 case 3:
1598 prepare_cede (aTHX_ &ta);
1599 break;
1600
1601 case 4:
1602 if (!prepare_cede_notself (aTHX_ &ta))
1603 XSRETURN_EMPTY;
1604
1605 break;
1606 }
1607
1608 BARRIER;
1609 PUTBACK;
1610 TRANSFER (ta);
1611 SPAGAIN; /* might be the sp of a different coroutine now */
1612 /* be extra careful not to ever do anything after TRANSFER */
1613}
1614
1615bool
1616_destroy (SV *coro_sv)
1617 CODE:
1618 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1619 OUTPUT: 3478 OUTPUT:
1620 RETVAL 3479 RETVAL
1621 3480
1622void 3481void
3482transfer (...)
3483 PROTOTYPE: $$
3484 CODE:
3485 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3486
3487void
1623_exit (code) 3488_exit (int code)
1624 int code
1625 PROTOTYPE: $ 3489 PROTOTYPE: $
1626 CODE: 3490 CODE:
1627 _exit (code); 3491 _exit (code);
1628 3492
3493SV *
3494clone (Coro::State coro)
3495 CODE:
3496{
3497#if CORO_CLONE
3498 struct coro *ncoro = coro_clone (aTHX_ coro);
3499 MAGIC *mg;
3500 /* TODO: too much duplication */
3501 ncoro->hv = newHV ();
3502 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3503 mg->mg_flags |= MGf_DUP;
3504 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3505#else
3506 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3507#endif
3508}
3509 OUTPUT:
3510 RETVAL
3511
1629int 3512int
1630cctx_stacksize (int new_stacksize = 0) 3513cctx_stacksize (int new_stacksize = 0)
3514 PROTOTYPE: ;$
1631 CODE: 3515 CODE:
1632 RETVAL = coro_stacksize; 3516 RETVAL = cctx_stacksize;
1633 if (new_stacksize) 3517 if (new_stacksize)
3518 {
1634 coro_stacksize = new_stacksize; 3519 cctx_stacksize = new_stacksize;
3520 ++cctx_gen;
3521 }
1635 OUTPUT: 3522 OUTPUT:
1636 RETVAL 3523 RETVAL
1637 3524
1638int 3525int
3526cctx_max_idle (int max_idle = 0)
3527 PROTOTYPE: ;$
3528 CODE:
3529 RETVAL = cctx_max_idle;
3530 if (max_idle > 1)
3531 cctx_max_idle = max_idle;
3532 OUTPUT:
3533 RETVAL
3534
3535int
1639cctx_count () 3536cctx_count ()
3537 PROTOTYPE:
1640 CODE: 3538 CODE:
1641 RETVAL = cctx_count; 3539 RETVAL = cctx_count;
1642 OUTPUT: 3540 OUTPUT:
1643 RETVAL 3541 RETVAL
1644 3542
1645int 3543int
1646cctx_idle () 3544cctx_idle ()
3545 PROTOTYPE:
1647 CODE: 3546 CODE:
1648 RETVAL = cctx_idle; 3547 RETVAL = cctx_idle;
1649 OUTPUT: 3548 OUTPUT:
1650 RETVAL 3549 RETVAL
1651 3550
1652void 3551void
1653list () 3552list ()
3553 PROTOTYPE:
1654 PPCODE: 3554 PPCODE:
1655{ 3555{
1656 struct coro *coro; 3556 struct coro *coro;
1657 for (coro = coro_first; coro; coro = coro->next) 3557 for (coro = coro_first; coro; coro = coro->next)
1658 if (coro->hv) 3558 if (coro->hv)
… …
1663call (Coro::State coro, SV *coderef) 3563call (Coro::State coro, SV *coderef)
1664 ALIAS: 3564 ALIAS:
1665 eval = 1 3565 eval = 1
1666 CODE: 3566 CODE:
1667{ 3567{
1668 if (coro->mainstack) 3568 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1669 { 3569 {
1670 struct coro temp; 3570 struct coro *current = SvSTATE_current;
3571 struct CoroSLF slf_save;
1671 3572
1672 if (!(coro->flags & CF_RUNNING)) 3573 if (current != coro)
1673 { 3574 {
3575 PUTBACK;
1674 save_perl (aTHX_ &temp); 3576 save_perl (aTHX_ current);
1675 load_perl (aTHX_ coro); 3577 load_perl (aTHX_ coro);
3578 /* the coro is most likely in an active SLF call.
3579 * while not strictly required (the code we execute is
3580 * not allowed to call any SLF functions), it's cleaner
3581 * to reinitialise the slf_frame and restore it later.
3582 * This might one day allow us to actually do SLF calls
3583 * from code executed here.
3584 */
3585 slf_save = slf_frame;
3586 slf_frame.prepare = 0;
3587 SPAGAIN;
1676 } 3588 }
1677 3589
1678 {
1679 dSP;
1680 ENTER;
1681 SAVETMPS;
1682 PUTBACK;
1683 PUSHSTACK; 3590 PUSHSTACK;
3591
1684 PUSHMARK (SP); 3592 PUSHMARK (SP);
3593 PUTBACK;
1685 3594
1686 if (ix) 3595 if (ix)
1687 eval_sv (coderef, 0); 3596 eval_sv (coderef, 0);
1688 else 3597 else
1689 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3598 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1690 3599
1691 POPSTACK; 3600 POPSTACK;
1692 SPAGAIN; 3601 SPAGAIN;
1693 FREETMPS;
1694 LEAVE;
1695 PUTBACK;
1696 }
1697 3602
1698 if (!(coro->flags & CF_RUNNING)) 3603 if (current != coro)
1699 { 3604 {
3605 PUTBACK;
3606 slf_frame = slf_save;
1700 save_perl (aTHX_ coro); 3607 save_perl (aTHX_ coro);
1701 load_perl (aTHX_ &temp); 3608 load_perl (aTHX_ current);
3609 SPAGAIN;
1702 } 3610 }
1703 } 3611 }
1704} 3612}
1705 3613
1706SV * 3614SV *
… …
1708 PROTOTYPE: $ 3616 PROTOTYPE: $
1709 ALIAS: 3617 ALIAS:
1710 is_ready = CF_READY 3618 is_ready = CF_READY
1711 is_running = CF_RUNNING 3619 is_running = CF_RUNNING
1712 is_new = CF_NEW 3620 is_new = CF_NEW
1713 is_destroyed = CF_DESTROYED 3621 is_destroyed = CF_ZOMBIE
3622 is_zombie = CF_ZOMBIE
3623 is_suspended = CF_SUSPENDED
1714 CODE: 3624 CODE:
1715 RETVAL = boolSV (coro->flags & ix); 3625 RETVAL = boolSV (coro->flags & ix);
1716 OUTPUT: 3626 OUTPUT:
1717 RETVAL 3627 RETVAL
1718 3628
1719void 3629void
3630throw (Coro::State self, SV *exception = &PL_sv_undef)
3631 PROTOTYPE: $;$
3632 CODE:
3633{
3634 struct coro *current = SvSTATE_current;
3635 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3636 SvREFCNT_dec (*exceptionp);
3637 SvGETMAGIC (exception);
3638 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3639}
3640
3641void
1720api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3642api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3643 PROTOTYPE: $;$
3644 C_ARGS: aTHX_ coro, flags
1721 3645
1722SV * 3646SV *
1723has_stack (Coro::State coro) 3647has_cctx (Coro::State coro)
1724 PROTOTYPE: $ 3648 PROTOTYPE: $
1725 CODE: 3649 CODE:
1726 RETVAL = boolSV (!!coro->cctx); 3650 /* maybe manage the running flag differently */
3651 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1727 OUTPUT: 3652 OUTPUT:
1728 RETVAL 3653 RETVAL
1729 3654
1730int 3655int
1731is_traced (Coro::State coro) 3656is_traced (Coro::State coro)
… …
1733 CODE: 3658 CODE:
1734 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3659 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1735 OUTPUT: 3660 OUTPUT:
1736 RETVAL 3661 RETVAL
1737 3662
1738IV 3663UV
1739rss (Coro::State coro) 3664rss (Coro::State coro)
1740 PROTOTYPE: $ 3665 PROTOTYPE: $
1741 ALIAS: 3666 ALIAS:
1742 usecount = 1 3667 usecount = 1
1743 CODE: 3668 CODE:
… …
1747 case 1: RETVAL = coro->usecount; break; 3672 case 1: RETVAL = coro->usecount; break;
1748 } 3673 }
1749 OUTPUT: 3674 OUTPUT:
1750 RETVAL 3675 RETVAL
1751 3676
3677void
3678force_cctx ()
3679 PROTOTYPE:
3680 CODE:
3681 cctx_current->idle_sp = 0;
3682
3683void
3684swap_defsv (Coro::State self)
3685 PROTOTYPE: $
3686 ALIAS:
3687 swap_defav = 1
3688 CODE:
3689 if (!self->slot)
3690 croak ("cannot swap state with coroutine that has no saved state,");
3691 else
3692 {
3693 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3694 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3695
3696 SV *tmp = *src; *src = *dst; *dst = tmp;
3697 }
3698
3699void
3700cancel (Coro::State self)
3701 CODE:
3702 coro_state_destroy (aTHX_ self);
3703
3704SV *
3705enable_times (int enabled = enable_times)
3706 CODE:
3707{
3708 RETVAL = boolSV (enable_times);
3709
3710 if (enabled != enable_times)
3711 {
3712 enable_times = enabled;
3713
3714 coro_times_update ();
3715 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3716 }
3717}
3718 OUTPUT:
3719 RETVAL
3720
3721void
3722times (Coro::State self)
3723 PPCODE:
3724{
3725 struct coro *current = SvSTATE (coro_current);
3726
3727 if (ecb_expect_false (current == self))
3728 {
3729 coro_times_update ();
3730 coro_times_add (SvSTATE (coro_current));
3731 }
3732
3733 EXTEND (SP, 2);
3734 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3735 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3736
3737 if (ecb_expect_false (current == self))
3738 coro_times_sub (SvSTATE (coro_current));
3739}
3740
3741void
3742swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3743 CODE:
3744{
3745 struct coro *current = SvSTATE_current;
3746
3747 if (current == coro)
3748 SWAP_SVS (current);
3749
3750 if (!coro->swap_sv)
3751 coro->swap_sv = newAV ();
3752
3753 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3754 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3755
3756 if (current == coro)
3757 SWAP_SVS (current);
3758}
3759
1752 3760
1753MODULE = Coro::State PACKAGE = Coro 3761MODULE = Coro::State PACKAGE = Coro
1754 3762
1755BOOT: 3763BOOT:
1756{ 3764{
1757 int i;
1758
1759 sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE); 3765 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1760 sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE); 3766 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3767 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3768 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1761 av_async_pool = coro_get_av ("Coro::async_pool", TRUE); 3769 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3770 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3771 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3772 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1762 3773
1763 coro_current = coro_get_sv ("Coro::current", FALSE); 3774 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1764 SvREADONLY_on (coro_current); 3775 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
1765 3776 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3777 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3778
1766 coro_stash = gv_stashpv ("Coro", TRUE); 3779 coro_stash = gv_stashpv ("Coro", TRUE);
1767 3780
1768 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3781 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1769 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3782 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1770 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3783 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1771 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3784 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1772 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3785 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1773 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3786 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1774
1775 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1776 coro_ready[i] = newAV ();
1777 3787
1778 { 3788 {
1779 SV *sv = perl_get_sv ("Coro::API", TRUE); 3789 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1780 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1781 3790
1782 coroapi.schedule = api_schedule; 3791 coroapi.schedule = api_schedule;
3792 coroapi.schedule_to = api_schedule_to;
1783 coroapi.cede = api_cede; 3793 coroapi.cede = api_cede;
1784 coroapi.cede_notself = api_cede_notself; 3794 coroapi.cede_notself = api_cede_notself;
1785 coroapi.ready = api_ready; 3795 coroapi.ready = api_ready;
1786 coroapi.is_ready = api_is_ready; 3796 coroapi.is_ready = api_is_ready;
1787 coroapi.nready = &coro_nready; 3797 coroapi.nready = coro_nready;
1788 coroapi.current = coro_current; 3798 coroapi.current = coro_current;
1789 3799
1790 GCoroAPI = &coroapi; 3800 /*GCoroAPI = &coroapi;*/
1791 sv_setiv (sv, (IV)&coroapi); 3801 sv_setiv (sv, (IV)&coroapi);
1792 SvREADONLY_on (sv); 3802 SvREADONLY_on (sv);
1793 } 3803 }
1794} 3804}
3805
3806SV *
3807async (...)
3808 PROTOTYPE: &@
3809 CODE:
3810 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3811 api_ready (aTHX_ RETVAL);
3812 OUTPUT:
3813 RETVAL
3814
3815void
3816_destroy (Coro::State coro)
3817 CODE:
3818 /* used by the manager thread */
3819 coro_state_destroy (aTHX_ coro);
3820
3821void
3822on_destroy (Coro::State coro, SV *cb)
3823 CODE:
3824 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3825
3826void
3827join (...)
3828 CODE:
3829 CORO_EXECUTE_SLF_XS (slf_init_join);
3830
3831void
3832terminate (...)
3833 CODE:
3834 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3835
3836void
3837cancel (...)
3838 CODE:
3839 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3840
3841int
3842safe_cancel (Coro::State self, ...)
3843 C_ARGS: aTHX_ self, &ST (1), items - 1
3844
3845void
3846schedule (...)
3847 CODE:
3848 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3849
3850void
3851schedule_to (...)
3852 CODE:
3853 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3854
3855void
3856cede_to (...)
3857 CODE:
3858 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3859
3860void
3861cede (...)
3862 CODE:
3863 CORO_EXECUTE_SLF_XS (slf_init_cede);
3864
3865void
3866cede_notself (...)
3867 CODE:
3868 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1795 3869
1796void 3870void
1797_set_current (SV *current) 3871_set_current (SV *current)
1798 PROTOTYPE: $ 3872 PROTOTYPE: $
1799 CODE: 3873 CODE:
1800 SvREFCNT_dec (SvRV (coro_current)); 3874 SvREFCNT_dec (SvRV (coro_current));
1801 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3875 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3876
3877void
3878_set_readyhook (SV *hook)
3879 PROTOTYPE: $
3880 CODE:
3881 SvREFCNT_dec (coro_readyhook);
3882 SvGETMAGIC (hook);
3883 if (SvOK (hook))
3884 {
3885 coro_readyhook = newSVsv (hook);
3886 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3887 }
3888 else
3889 {
3890 coro_readyhook = 0;
3891 CORO_READYHOOK = 0;
3892 }
1802 3893
1803int 3894int
1804prio (Coro::State coro, int newprio = 0) 3895prio (Coro::State coro, int newprio = 0)
3896 PROTOTYPE: $;$
1805 ALIAS: 3897 ALIAS:
1806 nice = 1 3898 nice = 1
1807 CODE: 3899 CODE:
1808{ 3900{
1809 RETVAL = coro->prio; 3901 RETVAL = coro->prio;
… …
1811 if (items > 1) 3903 if (items > 1)
1812 { 3904 {
1813 if (ix) 3905 if (ix)
1814 newprio = coro->prio - newprio; 3906 newprio = coro->prio - newprio;
1815 3907
1816 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3908 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1817 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3909 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1818 3910
1819 coro->prio = newprio; 3911 coro->prio = newprio;
1820 } 3912 }
1821} 3913}
1822 OUTPUT: 3914 OUTPUT:
… …
1824 3916
1825SV * 3917SV *
1826ready (SV *self) 3918ready (SV *self)
1827 PROTOTYPE: $ 3919 PROTOTYPE: $
1828 CODE: 3920 CODE:
1829 RETVAL = boolSV (api_ready (self)); 3921 RETVAL = boolSV (api_ready (aTHX_ self));
1830 OUTPUT: 3922 OUTPUT:
1831 RETVAL 3923 RETVAL
1832 3924
1833int 3925int
1834nready (...) 3926nready (...)
… …
1837 RETVAL = coro_nready; 3929 RETVAL = coro_nready;
1838 OUTPUT: 3930 OUTPUT:
1839 RETVAL 3931 RETVAL
1840 3932
1841void 3933void
1842throw (Coro::State self, SV *throw = &PL_sv_undef) 3934suspend (Coro::State self)
1843 PROTOTYPE: $;$ 3935 PROTOTYPE: $
1844 CODE: 3936 CODE:
1845 SvREFCNT_dec (self->throw); 3937 self->flags |= CF_SUSPENDED;
1846 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1847 3938
1848# for async_pool speedup
1849void 3939void
1850_pool_1 (SV *cb) 3940resume (Coro::State self)
3941 PROTOTYPE: $
1851 CODE: 3942 CODE:
1852{ 3943 self->flags &= ~CF_SUSPENDED;
1853 struct coro *coro = SvSTATE (coro_current);
1854 HV *hv = (HV *)SvRV (coro_current);
1855 AV *defav = GvAV (PL_defgv);
1856 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1857 AV *invoke_av;
1858 int i, len;
1859 3944
1860 if (!invoke) 3945void
1861 croak ("\3async_pool terminate\2\n"); 3946_pool_handler (...)
3947 CODE:
3948 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1862 3949
1863 SvREFCNT_dec (coro->saved_deffh); 3950void
1864 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 3951async_pool (SV *cv, ...)
3952 PROTOTYPE: &@
3953 PPCODE:
3954{
3955 HV *hv = (HV *)av_pop (av_async_pool);
3956 AV *av = newAV ();
3957 SV *cb = ST (0);
3958 int i;
1865 3959
1866 hv_store (hv, "desc", sizeof ("desc") - 1, 3960 av_extend (av, items - 2);
1867 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3961 for (i = 1; i < items; ++i)
3962 av_push (av, SvREFCNT_inc_NN (ST (i)));
1868 3963
1869 invoke_av = (AV *)SvRV (invoke); 3964 if ((SV *)hv == &PL_sv_undef)
1870 len = av_len (invoke_av);
1871
1872 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1873
1874 if (len > 0)
1875 { 3965 {
1876 av_fill (defav, len - 1); 3966 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1877 for (i = 0; i < len; ++i) 3967 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1878 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3968 SvREFCNT_dec (sv);
1879 } 3969 }
1880 3970
3971 {
3972 struct coro *coro = SvSTATE_hv (hv);
3973
3974 assert (!coro->invoke_cb);
3975 assert (!coro->invoke_av);
3976 coro->invoke_cb = SvREFCNT_inc (cb);
3977 coro->invoke_av = av;
3978 }
3979
3980 api_ready (aTHX_ (SV *)hv);
3981
3982 if (GIMME_V != G_VOID)
3983 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3984 else
1881 SvREFCNT_dec (invoke); 3985 SvREFCNT_dec (hv);
1882} 3986}
1883 3987
1884void 3988SV *
1885_pool_2 (SV *cb) 3989rouse_cb ()
3990 PROTOTYPE:
1886 CODE: 3991 CODE:
1887{ 3992 RETVAL = coro_new_rouse_cb (aTHX);
1888 struct coro *coro = SvSTATE (coro_current);
1889
1890 sv_setsv (cb, &PL_sv_undef);
1891
1892 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1893 coro->saved_deffh = 0;
1894
1895 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1896 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1897 croak ("\3async_pool terminate\2\n");
1898
1899 av_clear (GvAV (PL_defgv));
1900 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1901 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1902
1903 coro->prio = 0;
1904
1905 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1906 api_trace (coro_current, 0);
1907
1908 av_push (av_async_pool, newSVsv (coro_current));
1909}
1910
1911
1912MODULE = Coro::State PACKAGE = Coro::AIO
1913
1914SV *
1915_get_state ()
1916 CODE:
1917{
1918 struct io_state *data;
1919
1920 RETVAL = newSV (sizeof (struct io_state));
1921 data = (struct io_state *)SvPVX (RETVAL);
1922 SvCUR_set (RETVAL, sizeof (struct io_state));
1923 SvPOK_only (RETVAL);
1924
1925 data->errorno = errno;
1926 data->laststype = PL_laststype;
1927 data->laststatval = PL_laststatval;
1928 data->statcache = PL_statcache;
1929}
1930 OUTPUT: 3993 OUTPUT:
1931 RETVAL 3994 RETVAL
1932 3995
1933void 3996void
1934_set_state (char *data_) 3997rouse_wait (...)
3998 PROTOTYPE: ;$
3999 PPCODE:
4000 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4001
4002void
4003on_enter (SV *block)
4004 ALIAS:
4005 on_leave = 1
1935 PROTOTYPE: $ 4006 PROTOTYPE: &
1936 CODE: 4007 CODE:
1937{ 4008{
1938 struct io_state *data = (void *)data_; 4009 struct coro *coro = SvSTATE_current;
4010 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1939 4011
1940 errno = data->errorno; 4012 block = s_get_cv_croak (block);
1941 PL_laststype = data->laststype;
1942 PL_laststatval = data->laststatval;
1943 PL_statcache = data->statcache;
1944}
1945 4013
4014 if (!*avp)
4015 *avp = newAV ();
4016
4017 av_push (*avp, SvREFCNT_inc (block));
4018
4019 if (!ix)
4020 on_enterleave_call (aTHX_ block);
4021
4022 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4023 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4024 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4025}
4026
4027
4028MODULE = Coro::State PACKAGE = PerlIO::cede
4029
4030BOOT:
4031 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4032
4033
4034MODULE = Coro::State PACKAGE = Coro::Semaphore
4035
4036SV *
4037new (SV *klass, SV *count = 0)
4038 CODE:
4039{
4040 int semcnt = 1;
4041
4042 if (count)
4043 {
4044 SvGETMAGIC (count);
4045
4046 if (SvOK (count))
4047 semcnt = SvIV (count);
4048 }
4049
4050 RETVAL = sv_bless (
4051 coro_waitarray_new (aTHX_ semcnt),
4052 GvSTASH (CvGV (cv))
4053 );
4054}
4055 OUTPUT:
4056 RETVAL
4057
4058# helper for Coro::Channel and others
4059SV *
4060_alloc (int count)
4061 CODE:
4062 RETVAL = coro_waitarray_new (aTHX_ count);
4063 OUTPUT:
4064 RETVAL
4065
4066SV *
4067count (SV *self)
4068 CODE:
4069 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4070 OUTPUT:
4071 RETVAL
4072
4073void
4074up (SV *self, int adjust = 1)
4075 ALIAS:
4076 adjust = 1
4077 CODE:
4078 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4079
4080void
4081down (...)
4082 CODE:
4083 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4084
4085void
4086wait (...)
4087 CODE:
4088 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4089
4090void
4091try (SV *self)
4092 PPCODE:
4093{
4094 AV *av = (AV *)SvRV (self);
4095 SV *count_sv = AvARRAY (av)[0];
4096 IV count = SvIVX (count_sv);
4097
4098 if (count > 0)
4099 {
4100 --count;
4101 SvIVX (count_sv) = count;
4102 XSRETURN_YES;
4103 }
4104 else
4105 XSRETURN_NO;
4106}
4107
4108void
4109waiters (SV *self)
4110 PPCODE:
4111{
4112 AV *av = (AV *)SvRV (self);
4113 int wcount = AvFILLp (av) + 1 - 1;
4114
4115 if (GIMME_V == G_SCALAR)
4116 XPUSHs (sv_2mortal (newSViv (wcount)));
4117 else
4118 {
4119 int i;
4120 EXTEND (SP, wcount);
4121 for (i = 1; i <= wcount; ++i)
4122 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4123 }
4124}
4125
4126MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4127
4128void
4129_may_delete (SV *sem, int count, int extra_refs)
4130 PPCODE:
4131{
4132 AV *av = (AV *)SvRV (sem);
4133
4134 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4135 && AvFILLp (av) == 0 /* no waiters, just count */
4136 && SvIV (AvARRAY (av)[0]) == count)
4137 XSRETURN_YES;
4138
4139 XSRETURN_NO;
4140}
4141
4142MODULE = Coro::State PACKAGE = Coro::Signal
4143
4144SV *
4145new (SV *klass)
4146 CODE:
4147 RETVAL = sv_bless (
4148 coro_waitarray_new (aTHX_ 0),
4149 GvSTASH (CvGV (cv))
4150 );
4151 OUTPUT:
4152 RETVAL
4153
4154void
4155wait (...)
4156 CODE:
4157 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4158
4159void
4160broadcast (SV *self)
4161 CODE:
4162{
4163 AV *av = (AV *)SvRV (self);
4164 coro_signal_wake (aTHX_ av, AvFILLp (av));
4165}
4166
4167void
4168send (SV *self)
4169 CODE:
4170{
4171 AV *av = (AV *)SvRV (self);
4172
4173 if (AvFILLp (av))
4174 coro_signal_wake (aTHX_ av, 1);
4175 else
4176 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4177}
4178
4179IV
4180awaited (SV *self)
4181 CODE:
4182 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4183 OUTPUT:
4184 RETVAL
4185
4186
4187MODULE = Coro::State PACKAGE = Coro::AnyEvent
4188
4189BOOT:
4190 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4191
4192void
4193_schedule (...)
4194 CODE:
4195{
4196 static int incede;
4197
4198 api_cede_notself (aTHX);
4199
4200 ++incede;
4201 while (coro_nready >= incede && api_cede (aTHX))
4202 ;
4203
4204 sv_setsv (sv_activity, &PL_sv_undef);
4205 if (coro_nready >= incede)
4206 {
4207 PUSHMARK (SP);
4208 PUTBACK;
4209 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4210 }
4211
4212 --incede;
4213}
4214
4215
4216MODULE = Coro::State PACKAGE = Coro::AIO
4217
4218void
4219_register (char *target, char *proto, SV *req)
4220 CODE:
4221{
4222 SV *req_cv = s_get_cv_croak (req);
4223 /* newXSproto doesn't return the CV on 5.8 */
4224 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4225 sv_setpv ((SV *)slf_cv, proto);
4226 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4227}
4228
4229MODULE = Coro::State PACKAGE = Coro::Select
4230
4231void
4232patch_pp_sselect ()
4233 CODE:
4234 if (!coro_old_pp_sselect)
4235 {
4236 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4237 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4238 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4239 }
4240
4241void
4242unpatch_pp_sselect ()
4243 CODE:
4244 if (coro_old_pp_sselect)
4245 {
4246 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4247 coro_old_pp_sselect = 0;
4248 }
4249

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