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Comparing Coro/Coro/State.xs (file contents):
Revision 1.220 by root, Thu Jan 10 05:43:14 2008 UTC vs.
Revision 1.375 by root, Fri Oct 2 19:58:02 2009 UTC

1#define NDEBUG 1
2
1#include "libcoro/coro.c" 3#include "libcoro/coro.c"
2 4
3#define PERL_NO_GET_CONTEXT 5#define PERL_NO_GET_CONTEXT
4#define PERL_EXT 6#define PERL_EXT
5 7
6#include "EXTERN.h" 8#include "EXTERN.h"
7#include "perl.h" 9#include "perl.h"
8#include "XSUB.h" 10#include "XSUB.h"
11#include "perliol.h"
9 12
10#include "patchlevel.h" 13#include "schmorp.h"
11 14
12#include <stdio.h> 15#include <stdio.h>
13#include <errno.h> 16#include <errno.h>
14#include <assert.h> 17#include <assert.h>
18
19#ifndef SVs_PADSTALE
20# define SVs_PADSTALE 0
21#endif
22
23#ifdef WIN32
24# undef setjmp
25# undef longjmp
26# undef _exit
27# define setjmp _setjmp /* deep magic */
28#else
15#include <inttypes.h> /* portable stdint.h */ 29# include <inttypes.h> /* most portable stdint.h */
30#endif
16 31
17#ifdef HAVE_MMAP 32#ifdef HAVE_MMAP
18# include <unistd.h> 33# include <unistd.h>
19# include <sys/mman.h> 34# include <sys/mman.h>
20# ifndef MAP_ANONYMOUS 35# ifndef MAP_ANONYMOUS
… …
37# define BOOT_PAGESIZE (void)0 52# define BOOT_PAGESIZE (void)0
38#endif 53#endif
39 54
40#if CORO_USE_VALGRIND 55#if CORO_USE_VALGRIND
41# include <valgrind/valgrind.h> 56# 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 57#endif
46 58
47/* the maximum number of idle cctx that will be pooled */ 59/* the maximum number of idle cctx that will be pooled */
48#define MAX_IDLE_CCTX 8 60static 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 61
90#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 62#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
91# undef CORO_STACKGUARD 63# undef CORO_STACKGUARD
92#endif 64#endif
93 65
… …
100# define CORO_PREFER_PERL_FUNCTIONS 0 72# define CORO_PREFER_PERL_FUNCTIONS 0
101#endif 73#endif
102 74
103/* The next macros try to return the current stack pointer, in an as 75/* The next macros try to return the current stack pointer, in an as
104 * portable way as possible. */ 76 * portable way as possible. */
77#if __GNUC__ >= 4
78# define dSTACKLEVEL int stacklevel_dummy
79# define STACKLEVEL __builtin_frame_address (0)
80#else
105#define dSTACKLEVEL volatile char stacklevel 81# define dSTACKLEVEL volatile void *stacklevel
106#define STACKLEVEL ((void *)&stacklevel) 82# define STACKLEVEL ((void *)&stacklevel)
83#endif
107 84
108#define IN_DESTRUCT (PL_main_cv == Nullcv) 85#define IN_DESTRUCT PL_dirty
109 86
110#if __GNUC__ >= 3 87#if __GNUC__ >= 3
111# define attribute(x) __attribute__(x) 88# define attribute(x) __attribute__(x)
112# define BARRIER __asm__ __volatile__ ("" : : : "memory")
113# define expect(expr,value) __builtin_expect ((expr),(value)) 89# define expect(expr,value) __builtin_expect ((expr), (value))
90# define INLINE static inline
114#else 91#else
115# define attribute(x) 92# define attribute(x)
116# define BARRIER
117# define expect(expr,value) (expr) 93# define expect(expr,value) (expr)
94# define INLINE static
118#endif 95#endif
119 96
120#define expect_false(expr) expect ((expr) != 0, 0) 97#define expect_false(expr) expect ((expr) != 0, 0)
121#define expect_true(expr) expect ((expr) != 0, 1) 98#define expect_true(expr) expect ((expr) != 0, 1)
122 99
123#define NOINLINE attribute ((noinline)) 100#define NOINLINE attribute ((noinline))
124 101
125#include "CoroAPI.h" 102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
126 104
127#ifdef USE_ITHREADS 105#ifdef USE_ITHREADS
128static perl_mutex coro_mutex; 106# if CORO_PTHREAD
129# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 107static void *coro_thx;
130# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 108# endif
131#else
132# define LOCK (void)0
133# define UNLOCK (void)0
134#endif 109#endif
135 110
136/* helper storage struct for Coro::AIO */ 111#ifdef __linux
137struct io_state 112# include <time.h> /* for timespec */
138{ 113# include <syscall.h> /* for SYS_* */
139 int errorno; 114# ifdef SYS_clock_gettime
140 I32 laststype; 115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
141 int laststatval; 116# define CORO_CLOCK_MONOTONIC 1
142 Stat_t statcache; 117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
143}; 118# endif
119#endif
144 120
121static double (*nvtime)(); /* so why doesn't it take void? */
122static void (*u2time)(pTHX_ UV ret[2]);
123
124/* we hijack an hopefully unused CV flag for our purposes */
125#define CVf_SLF 0x4000
126static OP *pp_slf (pTHX);
127
128static U32 cctx_gen;
145static size_t coro_stacksize = CORO_STACKSIZE; 129static size_t cctx_stacksize = CORO_STACKSIZE;
146static struct CoroAPI coroapi; 130static struct CoroAPI coroapi;
147static AV *main_mainstack; /* used to differentiate between $main and others */ 131static AV *main_mainstack; /* used to differentiate between $main and others */
148static JMPENV *main_top_env; 132static JMPENV *main_top_env;
149static HV *coro_state_stash, *coro_stash; 133static HV *coro_state_stash, *coro_stash;
150static volatile SV *coro_mortal; /* will be freed after next transfer */ 134static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
135
136static AV *av_destroy; /* destruction queue */
137static SV *sv_manager; /* the manager coro */
138static SV *sv_idle; /* $Coro::idle */
151 139
152static GV *irsgv; /* $/ */ 140static GV *irsgv; /* $/ */
153static GV *stdoutgv; /* *STDOUT */ 141static GV *stdoutgv; /* *STDOUT */
154static SV *rv_diehook; 142static SV *rv_diehook;
155static SV *rv_warnhook; 143static SV *rv_warnhook;
156static HV *hv_sig; /* %SIG */ 144static HV *hv_sig; /* %SIG */
157 145
158/* async_pool helper stuff */ 146/* async_pool helper stuff */
159static SV *sv_pool_rss; 147static SV *sv_pool_rss;
160static SV *sv_pool_size; 148static SV *sv_pool_size;
149static SV *sv_async_pool_idle; /* description string */
161static AV *av_async_pool; 150static AV *av_async_pool; /* idle pool */
151static SV *sv_Coro; /* class string */
152static CV *cv_pool_handler;
153
154/* Coro::AnyEvent */
155static SV *sv_activity;
156
157/* enable processtime/realtime profiling */
158static char enable_times;
159typedef U32 coro_ts[2];
160static coro_ts time_real, time_cpu;
161static char times_valid;
162 162
163static struct coro_cctx *cctx_first; 163static struct coro_cctx *cctx_first;
164static int cctx_count, cctx_idle; 164static int cctx_count, cctx_idle;
165 165
166enum { 166enum {
… …
171 CC_TRACE_LINE = 0x10, /* trace each statement */ 171 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173}; 173};
174 174
175/* this is a structure representing a c-level coroutine */ 175/* this is a structure representing a c-level coroutine */
176typedef struct coro_cctx { 176typedef struct coro_cctx
177{
177 struct coro_cctx *next; 178 struct coro_cctx *next;
178 179
179 /* the stack */ 180 /* the stack */
180 void *sptr; 181 void *sptr;
181 size_t ssize; 182 size_t ssize;
… …
184 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
185 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 186 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
186 JMPENV *top_env; 187 JMPENV *top_env;
187 coro_context cctx; 188 coro_context cctx;
188 189
190 U32 gen;
189#if CORO_USE_VALGRIND 191#if CORO_USE_VALGRIND
190 int valgrind_id; 192 int valgrind_id;
191#endif 193#endif
192 unsigned char flags; 194 unsigned char flags;
193} coro_cctx; 195} coro_cctx;
194 196
197coro_cctx *cctx_current; /* the currently running cctx */
198
199/*****************************************************************************/
200
195enum { 201enum {
196 CF_RUNNING = 0x0001, /* coroutine is running */ 202 CF_RUNNING = 0x0001, /* coroutine is running */
197 CF_READY = 0x0002, /* coroutine is ready */ 203 CF_READY = 0x0002, /* coroutine is ready */
198 CF_NEW = 0x0004, /* has never been switched to */ 204 CF_NEW = 0x0004, /* has never been switched to */
199 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 205 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
206 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
200}; 207};
201 208
202/* 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 */
203typedef struct { 210typedef struct
211{
204 SV *defsv; 212 SV *defsv;
205 AV *defav; 213 AV *defav;
206 SV *errsv; 214 SV *errsv;
207 SV *irsgv; 215 SV *irsgv;
216 HV *hinthv;
208#define VAR(name,type) type name; 217#define VAR(name,type) type name;
209# include "state.h" 218# include "state.h"
210#undef VAR 219#undef VAR
211} perl_slots; 220} perl_slots;
212 221
213#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 222#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
214 223
215/* this is a structure representing a perl-level coroutine */ 224/* this is a structure representing a perl-level coroutine */
216struct coro { 225struct coro {
217 /* the c coroutine allocated to this perl coroutine, if any */ 226 /* the C coroutine allocated to this perl coroutine, if any */
218 coro_cctx *cctx; 227 coro_cctx *cctx;
219 228
220 /* process data */ 229 /* ready queue */
230 struct coro *next_ready;
231
232 /* state data */
233 struct CoroSLF slf_frame; /* saved slf frame */
221 AV *mainstack; 234 AV *mainstack;
222 perl_slots *slot; /* basically the saved sp */ 235 perl_slots *slot; /* basically the saved sp */
223 236
237 CV *startcv; /* the CV to execute */
224 AV *args; /* data associated with this coroutine (initial args) */ 238 AV *args; /* data associated with this coroutine (initial args) */
225 int refcnt; /* coroutines are refcounted, yes */ 239 int refcnt; /* coroutines are refcounted, yes */
226 int flags; /* CF_ flags */ 240 int flags; /* CF_ flags */
227 HV *hv; /* the perl hash associated with this coro, if any */ 241 HV *hv; /* the perl hash associated with this coro, if any */
242 void (*on_destroy)(pTHX_ struct coro *coro);
228 243
229 /* statistics */ 244 /* statistics */
230 int usecount; /* number of transfers to this coro */ 245 int usecount; /* number of transfers to this coro */
231 246
232 /* coro process data */ 247 /* coro process data */
233 int prio; 248 int prio;
234 SV *throw; /* exception to be thrown */ 249 SV *except; /* exception to be thrown */
250 SV *rouse_cb;
235 251
236 /* async_pool */ 252 /* async_pool */
237 SV *saved_deffh; 253 SV *saved_deffh;
254 SV *invoke_cb;
255 AV *invoke_av;
256
257 /* on_enter/on_leave */
258 AV *on_enter;
259 AV *on_leave;
260
261 /* swap_sv */
262 AV *swap_sv;
263
264 /* times */
265 coro_ts t_cpu, t_real;
238 266
239 /* linked list */ 267 /* linked list */
240 struct coro *next, *prev; 268 struct coro *next, *prev;
241}; 269};
242 270
243typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
244typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
245 273
274/* the following variables are effectively part of the perl context */
275/* and get copied between struct coro and these variables */
276/* the mainr easonw e don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */
278
246/** Coro ********************************************************************/ 279/** Coro ********************************************************************/
247 280
248#define PRIO_MAX 3 281#define CORO_PRIO_MAX 3
249#define PRIO_HIGH 1 282#define CORO_PRIO_HIGH 1
250#define PRIO_NORMAL 0 283#define CORO_PRIO_NORMAL 0
251#define PRIO_LOW -1 284#define CORO_PRIO_LOW -1
252#define PRIO_IDLE -3 285#define CORO_PRIO_IDLE -3
253#define PRIO_MIN -4 286#define CORO_PRIO_MIN -4
254 287
255/* for Coro.pm */ 288/* for Coro.pm */
256static SV *coro_current; 289static SV *coro_current;
257static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 290static SV *coro_readyhook;
258static int coro_nready; 291static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
292static CV *cv_coro_run, *cv_coro_terminate;
259static struct coro *coro_first; 293static struct coro *coro_first;
294#define coro_nready coroapi.nready
295
296/** Coro::Select ************************************************************/
297
298static OP *(*coro_old_pp_sselect) (pTHX);
299static SV *coro_select_select;
300
301/* horrible hack, but if it works... */
302static OP *
303coro_pp_sselect (pTHX)
304{
305 dSP;
306 PUSHMARK (SP - 4); /* fake argument list */
307 XPUSHs (coro_select_select);
308 PUTBACK;
309
310 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
311 PL_op->op_flags |= OPf_STACKED;
312 PL_op->op_private = 0;
313 return PL_ppaddr [OP_ENTERSUB](aTHX);
314}
260 315
261/** lowlevel stuff **********************************************************/ 316/** lowlevel stuff **********************************************************/
262 317
263static SV * 318static SV *
264coro_get_sv (pTHX_ const char *name, int create) 319coro_get_sv (pTHX_ const char *name, int create)
265{ 320{
266#if PERL_VERSION_ATLEAST (5,9,0) 321#if PERL_VERSION_ATLEAST (5,10,0)
267 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
268 get_sv (name, create); 323 get_sv (name, create);
269#endif 324#endif
270 return get_sv (name, create); 325 return get_sv (name, create);
271} 326}
272 327
273static AV * 328static AV *
274coro_get_av (pTHX_ const char *name, int create) 329coro_get_av (pTHX_ const char *name, int create)
275{ 330{
276#if PERL_VERSION_ATLEAST (5,9,0) 331#if PERL_VERSION_ATLEAST (5,10,0)
277 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 332 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
278 get_av (name, create); 333 get_av (name, create);
279#endif 334#endif
280 return get_av (name, create); 335 return get_av (name, create);
281} 336}
282 337
283static HV * 338static HV *
284coro_get_hv (pTHX_ const char *name, int create) 339coro_get_hv (pTHX_ const char *name, int create)
285{ 340{
286#if PERL_VERSION_ATLEAST (5,9,0) 341#if PERL_VERSION_ATLEAST (5,10,0)
287 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 342 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
288 get_hv (name, create); 343 get_hv (name, create);
289#endif 344#endif
290 return get_hv (name, create); 345 return get_hv (name, create);
291} 346}
292 347
348INLINE void
349coro_times_update ()
350{
351#ifdef coro_clock_gettime
352 struct timespec ts;
353
354 ts.tv_sec = ts.tv_nsec = 0;
355 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
356 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
357
358 ts.tv_sec = ts.tv_nsec = 0;
359 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
360 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
361#else
362 dTHX;
363 UV tv[2];
364
365 u2time (aTHX_ tv);
366 time_real [0] = tv [0];
367 time_real [1] = tv [1] * 1000;
368#endif
369}
370
371INLINE void
372coro_times_add (struct coro *c)
373{
374 c->t_real [1] += time_real [1];
375 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
376 c->t_real [0] += time_real [0];
377
378 c->t_cpu [1] += time_cpu [1];
379 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
380 c->t_cpu [0] += time_cpu [0];
381}
382
383INLINE void
384coro_times_sub (struct coro *c)
385{
386 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
387 c->t_real [1] -= time_real [1];
388 c->t_real [0] -= time_real [0];
389
390 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
391 c->t_cpu [1] -= time_cpu [1];
392 c->t_cpu [0] -= time_cpu [0];
393}
394
395/*****************************************************************************/
396/* magic glue */
397
398#define CORO_MAGIC_type_cv 26
399#define CORO_MAGIC_type_state PERL_MAGIC_ext
400
401#define CORO_MAGIC_NN(sv, type) \
402 (expect_true (SvMAGIC (sv)->mg_type == type) \
403 ? SvMAGIC (sv) \
404 : mg_find (sv, type))
405
406#define CORO_MAGIC(sv, type) \
407 (expect_true (SvMAGIC (sv)) \
408 ? CORO_MAGIC_NN (sv, type) \
409 : 0)
410
411#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
412#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
413
414INLINE struct coro *
415SvSTATE_ (pTHX_ SV *coro)
416{
417 HV *stash;
418 MAGIC *mg;
419
420 if (SvROK (coro))
421 coro = SvRV (coro);
422
423 if (expect_false (SvTYPE (coro) != SVt_PVHV))
424 croak ("Coro::State object required");
425
426 stash = SvSTASH (coro);
427 if (expect_false (stash != coro_stash && stash != coro_state_stash))
428 {
429 /* very slow, but rare, check */
430 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
431 croak ("Coro::State object required");
432 }
433
434 mg = CORO_MAGIC_state (coro);
435 return (struct coro *)mg->mg_ptr;
436}
437
438#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
439
440/* faster than SvSTATE, but expects a coroutine hv */
441#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
442#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
443
444/*****************************************************************************/
445/* padlist management and caching */
446
293static AV * 447static AV *
294coro_clone_padlist (pTHX_ CV *cv) 448coro_derive_padlist (pTHX_ CV *cv)
295{ 449{
296 AV *padlist = CvPADLIST (cv); 450 AV *padlist = CvPADLIST (cv);
297 AV *newpadlist, *newpad; 451 AV *newpadlist, *newpad;
298 452
299 newpadlist = newAV (); 453 newpadlist = newAV ();
300 AvREAL_off (newpadlist); 454 AvREAL_off (newpadlist);
301#if PERL_VERSION_ATLEAST (5,9,0) 455#if PERL_VERSION_ATLEAST (5,10,0)
302 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 456 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
303#else 457#else
304 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 458 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
305#endif 459#endif
306 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 460 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
307 --AvFILLp (padlist); 461 --AvFILLp (padlist);
308 462
309 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 463 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
310 av_store (newpadlist, 1, (SV *)newpad); 464 av_store (newpadlist, 1, (SV *)newpad);
311 465
312 return newpadlist; 466 return newpadlist;
313} 467}
314 468
315static void 469static void
316free_padlist (pTHX_ AV *padlist) 470free_padlist (pTHX_ AV *padlist)
317{ 471{
318 /* may be during global destruction */ 472 /* may be during global destruction */
319 if (SvREFCNT (padlist)) 473 if (!IN_DESTRUCT)
320 { 474 {
321 I32 i = AvFILLp (padlist); 475 I32 i = AvFILLp (padlist);
322 while (i >= 0) 476
477 while (i > 0) /* special-case index 0 */
323 { 478 {
324 SV **svp = av_fetch (padlist, i--, FALSE); 479 /* we try to be extra-careful here */
325 if (svp) 480 AV *av = (AV *)AvARRAY (padlist)[i--];
326 { 481 I32 j = AvFILLp (av);
327 SV *sv; 482
328 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 483 while (j >= 0)
484 SvREFCNT_dec (AvARRAY (av)[j--]);
485
486 AvFILLp (av) = -1;
329 SvREFCNT_dec (sv); 487 SvREFCNT_dec (av);
330
331 SvREFCNT_dec (*svp);
332 }
333 } 488 }
334 489
490 SvREFCNT_dec (AvARRAY (padlist)[0]);
491
492 AvFILLp (padlist) = -1;
335 SvREFCNT_dec ((SV*)padlist); 493 SvREFCNT_dec ((SV*)padlist);
336 } 494 }
337} 495}
338 496
339static int 497static int
340coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 498coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
341{ 499{
342 AV *padlist; 500 AV *padlist;
343 AV *av = (AV *)mg->mg_obj; 501 AV *av = (AV *)mg->mg_obj;
502
503 /* perl manages to free our internal AV and _then_ call us */
504 if (IN_DESTRUCT)
505 return 0;
344 506
345 /* casting is fun. */ 507 /* casting is fun. */
346 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 508 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
347 free_padlist (aTHX_ padlist); 509 free_padlist (aTHX_ padlist);
348 510
511 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
512
349 return 0; 513 return 0;
350} 514}
351
352#define CORO_MAGIC_type_cv PERL_MAGIC_ext
353#define CORO_MAGIC_type_state PERL_MAGIC_ext
354 515
355static MGVTBL coro_cv_vtbl = { 516static MGVTBL coro_cv_vtbl = {
356 0, 0, 0, 0, 517 0, 0, 0, 0,
357 coro_cv_free 518 coro_cv_free
358}; 519};
359
360#define CORO_MAGIC(sv,type) \
361 SvMAGIC (sv) \
362 ? SvMAGIC (sv)->mg_type == type \
363 ? SvMAGIC (sv) \
364 : mg_find (sv, type) \
365 : 0
366
367#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
368#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
369
370static struct coro *
371SvSTATE_ (pTHX_ SV *coro)
372{
373 HV *stash;
374 MAGIC *mg;
375
376 if (SvROK (coro))
377 coro = SvRV (coro);
378
379 if (expect_false (SvTYPE (coro) != SVt_PVHV))
380 croak ("Coro::State object required");
381
382 stash = SvSTASH (coro);
383 if (expect_false (stash != coro_stash && stash != coro_state_stash))
384 {
385 /* very slow, but rare, check */
386 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
387 croak ("Coro::State object required");
388 }
389
390 mg = CORO_MAGIC_state (coro);
391 return (struct coro *)mg->mg_ptr;
392}
393
394#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
395 520
396/* the next two functions merely cache the padlists */ 521/* the next two functions merely cache the padlists */
397static void 522static void
398get_padlist (pTHX_ CV *cv) 523get_padlist (pTHX_ CV *cv)
399{ 524{
… …
403 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 528 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
404 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 529 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
405 else 530 else
406 { 531 {
407#if CORO_PREFER_PERL_FUNCTIONS 532#if CORO_PREFER_PERL_FUNCTIONS
408 /* this is probably cleaner, but also slower? */ 533 /* this is probably cleaner? but also slower! */
534 /* in practise, it seems to be less stable */
409 CV *cp = Perl_cv_clone (cv); 535 CV *cp = Perl_cv_clone (aTHX_ cv);
410 CvPADLIST (cv) = CvPADLIST (cp); 536 CvPADLIST (cv) = CvPADLIST (cp);
411 CvPADLIST (cp) = 0; 537 CvPADLIST (cp) = 0;
412 SvREFCNT_dec (cp); 538 SvREFCNT_dec (cp);
413#else 539#else
414 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 540 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
415#endif 541#endif
416 } 542 }
417} 543}
418 544
419static void 545static void
… …
426 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 552 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
427 553
428 av = (AV *)mg->mg_obj; 554 av = (AV *)mg->mg_obj;
429 555
430 if (expect_false (AvFILLp (av) >= AvMAX (av))) 556 if (expect_false (AvFILLp (av) >= AvMAX (av)))
431 av_extend (av, AvMAX (av) + 1); 557 av_extend (av, AvFILLp (av) + 1);
432 558
433 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 559 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
434} 560}
435 561
436/** load & save, init *******************************************************/ 562/** load & save, init *******************************************************/
563
564/* swap sv heads, at least logically */
565static void
566swap_svs (pTHX_ Coro__State c)
567{
568 int i;
569
570 for (i = 0; i <= AvFILLp (c->swap_sv); )
571 {
572 SV *a = AvARRAY (c->swap_sv)[i++];
573 SV *b = AvARRAY (c->swap_sv)[i++];
574
575 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
576 SV tmp;
577
578 /* swap sv_any */
579 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
580
581 /* swap sv_flags */
582 SvFLAGS (&tmp) = SvFLAGS (a);
583 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
584 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
585
586#if PERL_VERSION_ATLEAST (5,10,0)
587 /* perl 5.10 complicates this _quite_ a bit, but it also is
588 * is much faster, so no quarrels here. alternatively, we could
589 * sv_upgrade to avoid this.
590 */
591 {
592 /* swap sv_u */
593 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
594
595 /* if SvANY points to the head, we need to adjust the pointers,
596 * as the pointer for a still points to b, and maybe vice versa.
597 */
598 #define svany_in_head(type) \
599 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
600
601 if (svany_in_head (SvTYPE (a)))
602 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
603
604 if (svany_in_head (SvTYPE (b)))
605 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
606 }
607#endif
608 }
609}
610
611#define SWAP_SVS(coro) \
612 if (expect_false ((coro)->swap_sv)) \
613 swap_svs (aTHX_ (coro))
614
615static void
616on_enterleave_call (pTHX_ SV *cb);
437 617
438static void 618static void
439load_perl (pTHX_ Coro__State c) 619load_perl (pTHX_ Coro__State c)
440{ 620{
441 perl_slots *slot = c->slot; 621 perl_slots *slot = c->slot;
442 c->slot = 0; 622 c->slot = 0;
443 623
444 PL_mainstack = c->mainstack; 624 PL_mainstack = c->mainstack;
445 625
446 GvSV (PL_defgv) = slot->defsv; 626 GvSV (PL_defgv) = slot->defsv;
447 GvAV (PL_defgv) = slot->defav; 627 GvAV (PL_defgv) = slot->defav;
448 GvSV (PL_errgv) = slot->errsv; 628 GvSV (PL_errgv) = slot->errsv;
449 GvSV (irsgv) = slot->irsgv; 629 GvSV (irsgv) = slot->irsgv;
630 GvHV (PL_hintgv) = slot->hinthv;
450 631
451 #define VAR(name,type) PL_ ## name = slot->name; 632 #define VAR(name,type) PL_ ## name = slot->name;
452 # include "state.h" 633 # include "state.h"
453 #undef VAR 634 #undef VAR
454 635
… …
465 CvPADLIST (cv) = (AV *)POPs; 646 CvPADLIST (cv) = (AV *)POPs;
466 } 647 }
467 648
468 PUTBACK; 649 PUTBACK;
469 } 650 }
651
652 slf_frame = c->slf_frame;
653 CORO_THROW = c->except;
654
655 if (expect_false (enable_times))
656 {
657 if (expect_false (!times_valid))
658 coro_times_update ();
659
660 coro_times_sub (c);
661 }
662
663 if (expect_false (c->on_enter))
664 {
665 int i;
666
667 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
668 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
669 }
670
671 SWAP_SVS (c);
470} 672}
471 673
472static void 674static void
473save_perl (pTHX_ Coro__State c) 675save_perl (pTHX_ Coro__State c)
474{ 676{
677 SWAP_SVS (c);
678
679 if (expect_false (c->on_leave))
680 {
681 int i;
682
683 for (i = AvFILLp (c->on_leave); i >= 0; --i)
684 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
685 }
686
687 times_valid = 0;
688
689 if (expect_false (enable_times))
690 {
691 coro_times_update (); times_valid = 1;
692 coro_times_add (c);
693 }
694
695 c->except = CORO_THROW;
696 c->slf_frame = slf_frame;
697
475 { 698 {
476 dSP; 699 dSP;
477 I32 cxix = cxstack_ix; 700 I32 cxix = cxstack_ix;
478 PERL_CONTEXT *ccstk = cxstack; 701 PERL_CONTEXT *ccstk = cxstack;
479 PERL_SI *top_si = PL_curstackinfo; 702 PERL_SI *top_si = PL_curstackinfo;
… …
489 { 712 {
490 while (expect_true (cxix >= 0)) 713 while (expect_true (cxix >= 0))
491 { 714 {
492 PERL_CONTEXT *cx = &ccstk[cxix--]; 715 PERL_CONTEXT *cx = &ccstk[cxix--];
493 716
494 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 717 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
495 { 718 {
496 CV *cv = cx->blk_sub.cv; 719 CV *cv = cx->blk_sub.cv;
497 720
498 if (expect_true (CvDEPTH (cv))) 721 if (expect_true (CvDEPTH (cv)))
499 { 722 {
500 EXTEND (SP, 3);
501 PUSHs ((SV *)CvPADLIST (cv)); 723 PUSHs ((SV *)CvPADLIST (cv));
502 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 724 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
503 PUSHs ((SV *)cv); 725 PUSHs ((SV *)cv);
504 726
505 CvDEPTH (cv) = 0; 727 CvDEPTH (cv) = 0;
506 get_padlist (aTHX_ cv); 728 get_padlist (aTHX_ cv);
507 } 729 }
… …
523 /* we manually unroll here, as usually 2 slots is enough */ 745 /* we manually unroll here, as usually 2 slots is enough */
524 if (SLOT_COUNT >= 1) CXINC; 746 if (SLOT_COUNT >= 1) CXINC;
525 if (SLOT_COUNT >= 2) CXINC; 747 if (SLOT_COUNT >= 2) CXINC;
526 if (SLOT_COUNT >= 3) CXINC; 748 if (SLOT_COUNT >= 3) CXINC;
527 { 749 {
528 int i; 750 unsigned int i;
529 for (i = 3; i < SLOT_COUNT; ++i) 751 for (i = 3; i < SLOT_COUNT; ++i)
530 CXINC; 752 CXINC;
531 } 753 }
532 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 754 cxstack_ix -= SLOT_COUNT; /* undo allocation */
533 755
534 c->mainstack = PL_mainstack; 756 c->mainstack = PL_mainstack;
535 757
536 { 758 {
537 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 759 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
538 760
539 slot->defav = GvAV (PL_defgv); 761 slot->defav = GvAV (PL_defgv);
540 slot->defsv = DEFSV; 762 slot->defsv = DEFSV;
541 slot->errsv = ERRSV; 763 slot->errsv = ERRSV;
542 slot->irsgv = GvSV (irsgv); 764 slot->irsgv = GvSV (irsgv);
765 slot->hinthv = GvHV (PL_hintgv);
543 766
544 #define VAR(name,type) slot->name = PL_ ## name; 767 #define VAR(name,type) slot->name = PL_ ## name;
545 # include "state.h" 768 # include "state.h"
546 #undef VAR 769 #undef VAR
547 } 770 }
548} 771}
549 772
550/* 773/*
551 * allocate various perl stacks. This is an exact copy 774 * allocate various perl stacks. This is almost an exact copy
552 * of perl.c:init_stacks, except that it uses less memory 775 * of perl.c:init_stacks, except that it uses less memory
553 * on the (sometimes correct) assumption that coroutines do 776 * on the (sometimes correct) assumption that coroutines do
554 * not usually need a lot of stackspace. 777 * not usually need a lot of stackspace.
555 */ 778 */
556#if CORO_PREFER_PERL_FUNCTIONS 779#if CORO_PREFER_PERL_FUNCTIONS
557# define coro_init_stacks init_stacks 780# define coro_init_stacks(thx) init_stacks ()
558#else 781#else
559static void 782static void
560coro_init_stacks (pTHX) 783coro_init_stacks (pTHX)
561{ 784{
562 PL_curstackinfo = new_stackinfo(32, 8); 785 PL_curstackinfo = new_stackinfo(32, 8);
… …
587 810
588 New(54,PL_savestack,24,ANY); 811 New(54,PL_savestack,24,ANY);
589 PL_savestack_ix = 0; 812 PL_savestack_ix = 0;
590 PL_savestack_max = 24; 813 PL_savestack_max = 24;
591 814
592#if !PERL_VERSION_ATLEAST (5,9,0) 815#if !PERL_VERSION_ATLEAST (5,10,0)
593 New(54,PL_retstack,4,OP*); 816 New(54,PL_retstack,4,OP*);
594 PL_retstack_ix = 0; 817 PL_retstack_ix = 0;
595 PL_retstack_max = 4; 818 PL_retstack_max = 4;
596#endif 819#endif
597} 820}
… …
599 822
600/* 823/*
601 * destroy the stacks, the callchain etc... 824 * destroy the stacks, the callchain etc...
602 */ 825 */
603static void 826static void
604coro_destroy_stacks (pTHX) 827coro_destruct_stacks (pTHX)
605{ 828{
606 while (PL_curstackinfo->si_next) 829 while (PL_curstackinfo->si_next)
607 PL_curstackinfo = PL_curstackinfo->si_next; 830 PL_curstackinfo = PL_curstackinfo->si_next;
608 831
609 while (PL_curstackinfo) 832 while (PL_curstackinfo)
… …
620 843
621 Safefree (PL_tmps_stack); 844 Safefree (PL_tmps_stack);
622 Safefree (PL_markstack); 845 Safefree (PL_markstack);
623 Safefree (PL_scopestack); 846 Safefree (PL_scopestack);
624 Safefree (PL_savestack); 847 Safefree (PL_savestack);
625#if !PERL_VERSION_ATLEAST (5,9,0) 848#if !PERL_VERSION_ATLEAST (5,10,0)
626 Safefree (PL_retstack); 849 Safefree (PL_retstack);
627#endif 850#endif
628} 851}
629 852
853#define CORO_RSS \
854 rss += sizeof (SYM (curstackinfo)); \
855 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
856 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
857 rss += SYM (tmps_max) * sizeof (SV *); \
858 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
859 rss += SYM (scopestack_max) * sizeof (I32); \
860 rss += SYM (savestack_max) * sizeof (ANY);
861
630static size_t 862static size_t
631coro_rss (pTHX_ struct coro *coro) 863coro_rss (pTHX_ struct coro *coro)
632{ 864{
633 size_t rss = sizeof (*coro); 865 size_t rss = sizeof (*coro);
634 866
635 if (coro->mainstack) 867 if (coro->mainstack)
636 { 868 {
637 perl_slots tmp_slot;
638 perl_slots *slot;
639
640 if (coro->flags & CF_RUNNING) 869 if (coro->flags & CF_RUNNING)
641 { 870 {
642 slot = &tmp_slot; 871 #define SYM(sym) PL_ ## sym
643 872 CORO_RSS;
644 #define VAR(name,type) slot->name = PL_ ## name;
645 # include "state.h"
646 #undef VAR 873 #undef SYM
647 } 874 }
648 else 875 else
649 slot = coro->slot; 876 {
650 877 #define SYM(sym) coro->slot->sym
651 rss += sizeof (slot->curstackinfo); 878 CORO_RSS;
652 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 879 #undef SYM
653 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 880 }
654 rss += slot->tmps_max * sizeof (SV *);
655 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
656 rss += slot->scopestack_max * sizeof (I32);
657 rss += slot->savestack_max * sizeof (ANY);
658
659#if !PERL_VERSION_ATLEAST (5,9,0)
660 rss += slot->retstack_max * sizeof (OP *);
661#endif
662 } 881 }
663 882
664 return rss; 883 return rss;
665} 884}
666 885
667/** coroutine stack handling ************************************************/ 886/** coroutine stack handling ************************************************/
668 887
669static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 888static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
670static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); 889static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
890static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
891
892/* apparently < 5.8.8 */
893#ifndef MgPV_nolen_const
894#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
895 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
896 (const char*)(mg)->mg_ptr)
897#endif
671 898
672/* 899/*
673 * This overrides the default magic get method of %SIG elements. 900 * This overrides the default magic get method of %SIG elements.
674 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 901 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
675 * and instead of tryign to save and restore the hash elements, we just provide 902 * and instead of trying to save and restore the hash elements, we just provide
676 * readback here. 903 * readback here.
677 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
678 * not expecting this to actually change the hook. This is a potential problem
679 * when a schedule happens then, but we ignore this.
680 */ 904 */
681static int 905static int
682coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 906coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
683{ 907{
684 const char *s = MgPV_nolen_const (mg); 908 const char *s = MgPV_nolen_const (mg);
685 909
686 if (*s == '_') 910 if (*s == '_')
687 { 911 {
688 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0; 912 SV **svp = 0;
689 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0; 913
914 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
915 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
916
917 if (svp)
918 {
919 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
920 return 0;
921 }
690 } 922 }
691 923
692 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 924 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
693} 925}
694 926
695static int 927static int
696coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 928coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
697{ 929{
698 const char *s = MgPV_nolen_const (mg); 930 const char *s = MgPV_nolen_const (mg);
699 931
700 if (*s == '_') 932 if (*s == '_')
701 { 933 {
… …
705 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 937 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
706 938
707 if (svp) 939 if (svp)
708 { 940 {
709 SV *old = *svp; 941 SV *old = *svp;
710 *svp = newSVsv (sv); 942 *svp = 0;
711 SvREFCNT_dec (old); 943 SvREFCNT_dec (old);
712 return; 944 return 0;
713 } 945 }
714 } 946 }
715 947
948 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
949}
950
951static int
952coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
953{
954 const char *s = MgPV_nolen_const (mg);
955
956 if (*s == '_')
957 {
958 SV **svp = 0;
959
960 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
961 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
962
963 if (svp)
964 {
965 SV *old = *svp;
966 *svp = SvOK (sv) ? newSVsv (sv) : 0;
967 SvREFCNT_dec (old);
968 return 0;
969 }
970 }
971
716 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 972 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
717} 973}
718 974
719static void 975static void
976prepare_nop (pTHX_ struct coro_transfer_args *ta)
977{
978 /* kind of mega-hacky, but works */
979 ta->next = ta->prev = (struct coro *)ta;
980}
981
982static int
983slf_check_nop (pTHX_ struct CoroSLF *frame)
984{
985 return 0;
986}
987
988static int
989slf_check_repeat (pTHX_ struct CoroSLF *frame)
990{
991 return 1;
992}
993
994static UNOP init_perl_op;
995
996static void NOINLINE /* noinline to keep it out of the transfer fast path */
720coro_setup (pTHX_ struct coro *coro) 997init_perl (pTHX_ struct coro *coro)
721{ 998{
722 /* 999 /*
723 * emulate part of the perl startup here. 1000 * emulate part of the perl startup here.
724 */ 1001 */
725 coro_init_stacks (aTHX); 1002 coro_init_stacks (aTHX);
726 1003
727 PL_runops = RUNOPS_DEFAULT; 1004 PL_runops = RUNOPS_DEFAULT;
728 PL_curcop = &PL_compiling; 1005 PL_curcop = &PL_compiling;
729 PL_in_eval = EVAL_NULL; 1006 PL_in_eval = EVAL_NULL;
730 PL_comppad = 0; 1007 PL_comppad = 0;
1008 PL_comppad_name = 0;
1009 PL_comppad_name_fill = 0;
1010 PL_comppad_name_floor = 0;
731 PL_curpm = 0; 1011 PL_curpm = 0;
732 PL_curpad = 0; 1012 PL_curpad = 0;
733 PL_localizing = 0; 1013 PL_localizing = 0;
734 PL_dirty = 0; 1014 PL_dirty = 0;
735 PL_restartop = 0; 1015 PL_restartop = 0;
1016#if PERL_VERSION_ATLEAST (5,10,0)
1017 PL_parser = 0;
1018#endif
1019 PL_hints = 0;
736 1020
737 /* recreate the die/warn hooks */ 1021 /* recreate the die/warn hooks */
738 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 1022 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
739 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 1023 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
740 1024
741 GvSV (PL_defgv) = newSV (0); 1025 GvSV (PL_defgv) = newSV (0);
742 GvAV (PL_defgv) = coro->args; coro->args = 0; 1026 GvAV (PL_defgv) = coro->args; coro->args = 0;
743 GvSV (PL_errgv) = newSV (0); 1027 GvSV (PL_errgv) = newSV (0);
744 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1028 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1029 GvHV (PL_hintgv) = 0;
745 PL_rs = newSVsv (GvSV (irsgv)); 1030 PL_rs = newSVsv (GvSV (irsgv));
746 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 1031 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
747 1032
748 { 1033 {
749 dSP; 1034 dSP;
750 LOGOP myop; 1035 UNOP myop;
751 1036
752 Zero (&myop, 1, LOGOP); 1037 Zero (&myop, 1, UNOP);
753 myop.op_next = Nullop; 1038 myop.op_next = Nullop;
1039 myop.op_type = OP_ENTERSUB;
754 myop.op_flags = OPf_WANT_VOID; 1040 myop.op_flags = OPf_WANT_VOID;
755 1041
756 PUSHMARK (SP); 1042 PUSHMARK (SP);
757 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1043 PUSHs ((SV *)coro->startcv);
758 PUTBACK; 1044 PUTBACK;
759 PL_op = (OP *)&myop; 1045 PL_op = (OP *)&myop;
760 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1046 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
761 SPAGAIN;
762 } 1047 }
763 1048
764 /* this newly created coroutine might be run on an existing cctx which most 1049 /* this newly created coroutine might be run on an existing cctx which most
765 * likely was suspended in set_stacklevel, called from entersub. 1050 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
766 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
767 * so we ENTER here for symmetry
768 */ 1051 */
769 ENTER; 1052 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
770} 1053 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
771 1054
1055 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1056 init_perl_op.op_next = PL_op;
1057 init_perl_op.op_type = OP_ENTERSUB;
1058 init_perl_op.op_ppaddr = pp_slf;
1059 /* no flags etc. required, as an init function won't be called */
1060
1061 PL_op = (OP *)&init_perl_op;
1062
1063 /* copy throw, in case it was set before init_perl */
1064 CORO_THROW = coro->except;
1065
1066 SWAP_SVS (coro);
1067
1068 if (expect_false (enable_times))
1069 {
1070 coro_times_update ();
1071 coro_times_sub (coro);
1072 }
1073}
1074
772static void 1075static void
773coro_destroy (pTHX_ struct coro *coro) 1076coro_unwind_stacks (pTHX)
774{ 1077{
775 if (!IN_DESTRUCT) 1078 if (!IN_DESTRUCT)
776 { 1079 {
777 /* restore all saved variables and stuff */ 1080 /* restore all saved variables and stuff */
778 LEAVE_SCOPE (0); 1081 LEAVE_SCOPE (0);
… …
786 POPSTACK_TO (PL_mainstack); 1089 POPSTACK_TO (PL_mainstack);
787 1090
788 /* unwind main stack */ 1091 /* unwind main stack */
789 dounwind (-1); 1092 dounwind (-1);
790 } 1093 }
1094}
791 1095
792 SvREFCNT_dec (GvSV (PL_defgv)); 1096static void
793 SvREFCNT_dec (GvAV (PL_defgv)); 1097destroy_perl (pTHX_ struct coro *coro)
794 SvREFCNT_dec (GvSV (PL_errgv)); 1098{
795 SvREFCNT_dec (PL_defoutgv); 1099 SV *svf [9];
796 SvREFCNT_dec (PL_rs);
797 SvREFCNT_dec (GvSV (irsgv));
798 1100
799 SvREFCNT_dec (PL_diehook);
800 SvREFCNT_dec (PL_warnhook);
801 1101 {
1102 struct coro *current = SvSTATE_current;
1103
1104 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1105
1106 save_perl (aTHX_ current);
1107 load_perl (aTHX_ coro);
1108
1109 coro_unwind_stacks (aTHX);
1110 coro_destruct_stacks (aTHX);
1111
1112 /* restore swapped sv's */
1113 SWAP_SVS (coro);
1114
1115 // now save some sv's to be free'd later
1116 svf [0] = GvSV (PL_defgv);
1117 svf [1] = (SV *)GvAV (PL_defgv);
1118 svf [2] = GvSV (PL_errgv);
1119 svf [3] = (SV *)PL_defoutgv;
1120 svf [4] = PL_rs;
1121 svf [5] = GvSV (irsgv);
1122 svf [6] = (SV *)GvHV (PL_hintgv);
1123 svf [7] = PL_diehook;
1124 svf [8] = PL_warnhook;
1125 assert (9 == sizeof (svf) / sizeof (*svf));
1126
1127 load_perl (aTHX_ current);
1128 }
1129
1130 {
1131 unsigned int i;
1132
1133 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1134 SvREFCNT_dec (svf [i]);
1135
802 SvREFCNT_dec (coro->saved_deffh); 1136 SvREFCNT_dec (coro->saved_deffh);
803 SvREFCNT_dec (coro->throw); 1137 SvREFCNT_dec (coro->rouse_cb);
804 1138 SvREFCNT_dec (coro->invoke_cb);
805 coro_destroy_stacks (aTHX); 1139 SvREFCNT_dec (coro->invoke_av);
1140 SvREFCNT_dec (coro->swap_sv);
1141 }
806} 1142}
807 1143
808static void 1144INLINE void
809free_coro_mortal (pTHX) 1145free_coro_mortal (pTHX)
810{ 1146{
811 if (expect_true (coro_mortal)) 1147 if (expect_true (coro_mortal))
812 { 1148 {
813 SvREFCNT_dec (coro_mortal); 1149 SvREFCNT_dec (coro_mortal);
… …
818static int 1154static int
819runops_trace (pTHX) 1155runops_trace (pTHX)
820{ 1156{
821 COP *oldcop = 0; 1157 COP *oldcop = 0;
822 int oldcxix = -2; 1158 int oldcxix = -2;
823 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
824 coro_cctx *cctx = coro->cctx;
825 1159
826 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1160 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
827 { 1161 {
828 PERL_ASYNC_CHECK (); 1162 PERL_ASYNC_CHECK ();
829 1163
830 if (cctx->flags & CC_TRACE_ALL) 1164 if (cctx_current->flags & CC_TRACE_ALL)
831 { 1165 {
832 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1166 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
833 { 1167 {
834 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1168 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
835 SV **bot, **top; 1169 SV **bot, **top;
836 AV *av = newAV (); /* return values */ 1170 AV *av = newAV (); /* return values */
837 SV **cb; 1171 SV **cb;
… …
847 : cx->blk_gimme == G_SCALAR ? bot + 1 1181 : cx->blk_gimme == G_SCALAR ? bot + 1
848 : bot; 1182 : bot;
849 1183
850 av_extend (av, top - bot); 1184 av_extend (av, top - bot);
851 while (bot < top) 1185 while (bot < top)
852 av_push (av, SvREFCNT_inc (*bot++)); 1186 av_push (av, SvREFCNT_inc_NN (*bot++));
853 1187
854 PL_runops = RUNOPS_DEFAULT; 1188 PL_runops = RUNOPS_DEFAULT;
855 ENTER; 1189 ENTER;
856 SAVETMPS; 1190 SAVETMPS;
857 EXTEND (SP, 3); 1191 EXTEND (SP, 3);
… …
874 1208
875 if (PL_curcop != &PL_compiling) 1209 if (PL_curcop != &PL_compiling)
876 { 1210 {
877 SV **cb; 1211 SV **cb;
878 1212
879 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1213 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
880 { 1214 {
881 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1215 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
882 1216
883 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1217 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
884 { 1218 {
885 runops_proc_t old_runops = PL_runops;
886 dSP; 1219 dSP;
887 GV *gv = CvGV (cx->blk_sub.cv); 1220 GV *gv = CvGV (cx->blk_sub.cv);
888 SV *fullname = sv_2mortal (newSV (0)); 1221 SV *fullname = sv_2mortal (newSV (0));
889 1222
890 if (isGV (gv)) 1223 if (isGV (gv))
… …
895 SAVETMPS; 1228 SAVETMPS;
896 EXTEND (SP, 3); 1229 EXTEND (SP, 3);
897 PUSHMARK (SP); 1230 PUSHMARK (SP);
898 PUSHs (&PL_sv_yes); 1231 PUSHs (&PL_sv_yes);
899 PUSHs (fullname); 1232 PUSHs (fullname);
900 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1233 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
901 PUTBACK; 1234 PUTBACK;
902 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1235 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
903 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1236 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
904 SPAGAIN; 1237 SPAGAIN;
905 FREETMPS; 1238 FREETMPS;
… …
908 } 1241 }
909 1242
910 oldcxix = cxstack_ix; 1243 oldcxix = cxstack_ix;
911 } 1244 }
912 1245
913 if (cctx->flags & CC_TRACE_LINE) 1246 if (cctx_current->flags & CC_TRACE_LINE)
914 { 1247 {
915 dSP; 1248 dSP;
916 1249
917 PL_runops = RUNOPS_DEFAULT; 1250 PL_runops = RUNOPS_DEFAULT;
918 ENTER; 1251 ENTER;
… …
937 1270
938 TAINT_NOT; 1271 TAINT_NOT;
939 return 0; 1272 return 0;
940} 1273}
941 1274
942/* inject a fake call to Coro::State::_cctx_init into the execution */ 1275static struct CoroSLF cctx_ssl_frame;
943/* _cctx_init should be careful, as it could be called at almost any time */ 1276
944/* during execution of a perl program */ 1277static void
1278slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1279{
1280 ta->prev = 0;
1281}
1282
1283static int
1284slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1285{
1286 *frame = cctx_ssl_frame;
1287
1288 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1289}
1290
1291/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
945static void NOINLINE 1292static void NOINLINE
946cctx_prepare (pTHX_ coro_cctx *cctx) 1293cctx_prepare (pTHX)
947{ 1294{
948 dSP;
949 LOGOP myop;
950
951 PL_top_env = &PL_start_env; 1295 PL_top_env = &PL_start_env;
952 1296
953 if (cctx->flags & CC_TRACE) 1297 if (cctx_current->flags & CC_TRACE)
954 PL_runops = runops_trace; 1298 PL_runops = runops_trace;
955 1299
956 Zero (&myop, 1, LOGOP); 1300 /* we already must be executing an SLF op, there is no other valid way
957 myop.op_next = PL_op; 1301 * that can lead to creation of a new cctx */
958 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1302 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1303 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
959 1304
960 PUSHMARK (SP); 1305 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
961 EXTEND (SP, 2); 1306 cctx_ssl_frame = slf_frame;
962 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1307
963 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1308 slf_frame.prepare = slf_prepare_set_stacklevel;
964 PUTBACK; 1309 slf_frame.check = slf_check_set_stacklevel;
965 PL_op = (OP *)&myop; 1310}
966 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1311
967 SPAGAIN; 1312/* the tail of transfer: execute stuff we can only do after a transfer */
1313INLINE void
1314transfer_tail (pTHX)
1315{
1316 free_coro_mortal (aTHX);
968} 1317}
969 1318
970/* 1319/*
971 * this is a _very_ stripped down perl interpreter ;) 1320 * this is a _very_ stripped down perl interpreter ;)
972 */ 1321 */
973static void 1322static void
974cctx_run (void *arg) 1323cctx_run (void *arg)
975{ 1324{
1325#ifdef USE_ITHREADS
1326# if CORO_PTHREAD
1327 PERL_SET_CONTEXT (coro_thx);
1328# endif
1329#endif
1330 {
976 dTHX; 1331 dTHX;
977 1332
978 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1333 /* normally we would need to skip the entersub here */
979 UNLOCK; 1334 /* not doing so will re-execute it, which is exactly what we want */
980
981 /* we now skip the entersub that lead to transfer() */
982 PL_op = PL_op->op_next; 1335 /* PL_nop = PL_nop->op_next */
983 1336
984 /* inject a fake subroutine call to cctx_init */ 1337 /* inject a fake subroutine call to cctx_init */
985 cctx_prepare (aTHX_ (coro_cctx *)arg); 1338 cctx_prepare (aTHX);
986 1339
1340 /* cctx_run is the alternative tail of transfer() */
1341 transfer_tail (aTHX);
1342
987 /* somebody or something will hit me for both perl_run and PL_restartop */ 1343 /* somebody or something will hit me for both perl_run and PL_restartop */
988 PL_restartop = PL_op; 1344 PL_restartop = PL_op;
989 perl_run (PL_curinterp); 1345 perl_run (PL_curinterp);
990
991 /* 1346 /*
1347 * Unfortunately, there is no way to get at the return values of the
1348 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1349 * runtime errors here, as this is just a random interpreter, not a thread.
1350 */
1351
1352 /*
992 * If perl-run returns we assume exit() was being called or the coro 1353 * If perl-run returns we assume exit() was being called or the coro
993 * fell off the end, which seems to be the only valid (non-bug) 1354 * fell off the end, which seems to be the only valid (non-bug)
994 * reason for perl_run to return. We try to exit by jumping to the 1355 * reason for perl_run to return. We try to exit by jumping to the
995 * bootstrap-time "top" top_env, as we cannot restore the "main" 1356 * bootstrap-time "top" top_env, as we cannot restore the "main"
996 * coroutine as Coro has no such concept 1357 * coroutine as Coro has no such concept.
1358 * This actually isn't valid with the pthread backend, but OSes requiring
1359 * that backend are too broken to do it in a standards-compliant way.
997 */ 1360 */
998 PL_top_env = main_top_env; 1361 PL_top_env = main_top_env;
999 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1362 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1363 }
1000} 1364}
1001 1365
1002static coro_cctx * 1366static coro_cctx *
1003cctx_new () 1367cctx_new ()
1004{ 1368{
1005 coro_cctx *cctx; 1369 coro_cctx *cctx;
1370
1371 ++cctx_count;
1372 New (0, cctx, 1, coro_cctx);
1373
1374 cctx->gen = cctx_gen;
1375 cctx->flags = 0;
1376 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1377
1378 return cctx;
1379}
1380
1381/* create a new cctx only suitable as source */
1382static coro_cctx *
1383cctx_new_empty ()
1384{
1385 coro_cctx *cctx = cctx_new ();
1386
1387 cctx->sptr = 0;
1388 coro_create (&cctx->cctx, 0, 0, 0, 0);
1389
1390 return cctx;
1391}
1392
1393/* create a new cctx suitable as destination/running a perl interpreter */
1394static coro_cctx *
1395cctx_new_run ()
1396{
1397 coro_cctx *cctx = cctx_new ();
1006 void *stack_start; 1398 void *stack_start;
1007 size_t stack_size; 1399 size_t stack_size;
1008 1400
1009 ++cctx_count;
1010
1011 Newz (0, cctx, 1, coro_cctx);
1012
1013#if HAVE_MMAP 1401#if HAVE_MMAP
1014 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1402 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1015 /* mmap supposedly does allocate-on-write for us */ 1403 /* mmap supposedly does allocate-on-write for us */
1016 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1404 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1017 1405
1018 if (cctx->sptr != (void *)-1) 1406 if (cctx->sptr != (void *)-1)
1019 { 1407 {
1020# if CORO_STACKGUARD 1408 #if CORO_STACKGUARD
1021 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1409 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1022# endif 1410 #endif
1023 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1411 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1024 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1412 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1025 cctx->flags |= CC_MAPPED; 1413 cctx->flags |= CC_MAPPED;
1026 } 1414 }
1027 else 1415 else
1028#endif 1416#endif
1029 { 1417 {
1030 cctx->ssize = coro_stacksize * (long)sizeof (long); 1418 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1031 New (0, cctx->sptr, coro_stacksize, long); 1419 New (0, cctx->sptr, cctx_stacksize, long);
1032 1420
1033 if (!cctx->sptr) 1421 if (!cctx->sptr)
1034 { 1422 {
1035 perror ("FATAL: unable to allocate stack for coroutine"); 1423 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1036 _exit (EXIT_FAILURE); 1424 _exit (EXIT_FAILURE);
1037 } 1425 }
1038 1426
1039 stack_start = cctx->sptr; 1427 stack_start = cctx->sptr;
1040 stack_size = cctx->ssize; 1428 stack_size = cctx->ssize;
1041 } 1429 }
1042 1430
1043 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1431 #if CORO_USE_VALGRIND
1432 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1433 #endif
1434
1044 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1435 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1045 1436
1046 return cctx; 1437 return cctx;
1047} 1438}
1048 1439
… …
1050cctx_destroy (coro_cctx *cctx) 1441cctx_destroy (coro_cctx *cctx)
1051{ 1442{
1052 if (!cctx) 1443 if (!cctx)
1053 return; 1444 return;
1054 1445
1446 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1447
1055 --cctx_count; 1448 --cctx_count;
1449 coro_destroy (&cctx->cctx);
1056 1450
1451 /* coro_transfer creates new, empty cctx's */
1452 if (cctx->sptr)
1453 {
1057#if CORO_USE_VALGRIND 1454 #if CORO_USE_VALGRIND
1058 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1455 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1456 #endif
1457
1458#if HAVE_MMAP
1459 if (cctx->flags & CC_MAPPED)
1460 munmap (cctx->sptr, cctx->ssize);
1461 else
1059#endif 1462#endif
1060
1061#if HAVE_MMAP
1062 if (cctx->flags & CC_MAPPED)
1063 munmap (cctx->sptr, cctx->ssize);
1064 else
1065#endif
1066 Safefree (cctx->sptr); 1463 Safefree (cctx->sptr);
1464 }
1067 1465
1068 Safefree (cctx); 1466 Safefree (cctx);
1069} 1467}
1070 1468
1071/* wether this cctx should be destructed */ 1469/* wether this cctx should be destructed */
1072#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1470#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1073 1471
1074static coro_cctx * 1472static coro_cctx *
1075cctx_get (pTHX) 1473cctx_get (pTHX)
1076{ 1474{
1077 while (expect_true (cctx_first)) 1475 while (expect_true (cctx_first))
… …
1084 return cctx; 1482 return cctx;
1085 1483
1086 cctx_destroy (cctx); 1484 cctx_destroy (cctx);
1087 } 1485 }
1088 1486
1089 return cctx_new (); 1487 return cctx_new_run ();
1090} 1488}
1091 1489
1092static void 1490static void
1093cctx_put (coro_cctx *cctx) 1491cctx_put (coro_cctx *cctx)
1094{ 1492{
1493 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1494
1095 /* free another cctx if overlimit */ 1495 /* free another cctx if overlimit */
1096 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1496 if (expect_false (cctx_idle >= cctx_max_idle))
1097 { 1497 {
1098 coro_cctx *first = cctx_first; 1498 coro_cctx *first = cctx_first;
1099 cctx_first = first->next; 1499 cctx_first = first->next;
1100 --cctx_idle; 1500 --cctx_idle;
1101 1501
… …
1110/** coroutine switching *****************************************************/ 1510/** coroutine switching *****************************************************/
1111 1511
1112static void 1512static void
1113transfer_check (pTHX_ struct coro *prev, struct coro *next) 1513transfer_check (pTHX_ struct coro *prev, struct coro *next)
1114{ 1514{
1515 /* TODO: throwing up here is considered harmful */
1516
1115 if (expect_true (prev != next)) 1517 if (expect_true (prev != next))
1116 { 1518 {
1117 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1519 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1118 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1520 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1119 1521
1120 if (expect_false (next->flags & CF_RUNNING))
1121 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1122
1123 if (expect_false (next->flags & CF_DESTROYED)) 1522 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1124 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1523 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1125 1524
1126 if (
1127#if PERL_VERSION_ATLEAST (5,9,0) 1525#if !PERL_VERSION_ATLEAST (5,10,0)
1128 expect_false (PL_parser)
1129#else
1130 expect_false (PL_lex_state != LEX_NOTPARSING) 1526 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1527 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1131#endif 1528#endif
1132 )
1133 croak ("Coro::State::transfer called while parsing, but this is not supported");
1134 } 1529 }
1135} 1530}
1136 1531
1137/* always use the TRANSFER macro */ 1532/* always use the TRANSFER macro */
1138static void NOINLINE 1533static void NOINLINE /* noinline so we have a fixed stackframe */
1139transfer (pTHX_ struct coro *prev, struct coro *next) 1534transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1140{ 1535{
1141 dSTACKLEVEL; 1536 dSTACKLEVEL;
1142 static volatile int has_throw;
1143 1537
1144 /* sometimes transfer is only called to set idle_sp */ 1538 /* sometimes transfer is only called to set idle_sp */
1145 if (expect_false (!next)) 1539 if (expect_false (!prev))
1146 { 1540 {
1147 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1541 cctx_current->idle_sp = STACKLEVEL;
1148 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1542 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1149 } 1543 }
1150 else if (expect_true (prev != next)) 1544 else if (expect_true (prev != next))
1151 { 1545 {
1152 coro_cctx *prev__cctx; 1546 coro_cctx *cctx_prev;
1153 1547
1154 if (expect_false (prev->flags & CF_NEW)) 1548 if (expect_false (prev->flags & CF_NEW))
1155 { 1549 {
1156 /* create a new empty context */ 1550 /* create a new empty/source context */
1157 Newz (0, prev->cctx, 1, coro_cctx);
1158 prev->flags &= ~CF_NEW; 1551 prev->flags &= ~CF_NEW;
1159 prev->flags |= CF_RUNNING; 1552 prev->flags |= CF_RUNNING;
1160 } 1553 }
1161 1554
1162 prev->flags &= ~CF_RUNNING; 1555 prev->flags &= ~CF_RUNNING;
1163 next->flags |= CF_RUNNING; 1556 next->flags |= CF_RUNNING;
1164
1165 LOCK;
1166 1557
1167 /* first get rid of the old state */ 1558 /* first get rid of the old state */
1168 save_perl (aTHX_ prev); 1559 save_perl (aTHX_ prev);
1169 1560
1170 if (expect_false (next->flags & CF_NEW)) 1561 if (expect_false (next->flags & CF_NEW))
1171 { 1562 {
1172 /* need to start coroutine */ 1563 /* need to start coroutine */
1173 next->flags &= ~CF_NEW; 1564 next->flags &= ~CF_NEW;
1174 /* setup coroutine call */ 1565 /* setup coroutine call */
1175 coro_setup (aTHX_ next); 1566 init_perl (aTHX_ next);
1176 } 1567 }
1177 else 1568 else
1178 load_perl (aTHX_ next); 1569 load_perl (aTHX_ next);
1179 1570
1180 prev__cctx = prev->cctx;
1181
1182 /* possibly "free" the cctx */ 1571 /* possibly untie and reuse the cctx */
1183 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))) 1572 if (expect_true (
1573 cctx_current->idle_sp == STACKLEVEL
1574 && !(cctx_current->flags & CC_TRACE)
1575 && !force_cctx
1576 ))
1184 { 1577 {
1185 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1578 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1186 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1579 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1187 1580
1188 prev->cctx = 0;
1189
1190 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1581 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1191 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1582 /* without this the next cctx_get might destroy the running cctx while still in use */
1192 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1583 if (expect_false (CCTX_EXPIRED (cctx_current)))
1193 if (!next->cctx) 1584 if (expect_true (!next->cctx))
1194 next->cctx = cctx_get (aTHX); 1585 next->cctx = cctx_get (aTHX);
1195 1586
1196 cctx_put (prev__cctx); 1587 cctx_put (cctx_current);
1197 } 1588 }
1589 else
1590 prev->cctx = cctx_current;
1198 1591
1199 ++next->usecount; 1592 ++next->usecount;
1200 1593
1201 if (expect_true (!next->cctx)) 1594 cctx_prev = cctx_current;
1202 next->cctx = cctx_get (aTHX); 1595 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1203 1596
1204 has_throw = !!next->throw; 1597 next->cctx = 0;
1205 1598
1206 if (expect_false (prev__cctx != next->cctx)) 1599 if (expect_false (cctx_prev != cctx_current))
1207 { 1600 {
1208 prev__cctx->top_env = PL_top_env; 1601 cctx_prev->top_env = PL_top_env;
1209 PL_top_env = next->cctx->top_env; 1602 PL_top_env = cctx_current->top_env;
1210 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1603 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1211 } 1604 }
1212 1605
1213 free_coro_mortal (aTHX); 1606 transfer_tail (aTHX);
1214 UNLOCK;
1215
1216 if (expect_false (has_throw))
1217 {
1218 struct coro *coro = SvSTATE (coro_current);
1219
1220 if (coro->throw)
1221 {
1222 SV *exception = coro->throw;
1223 coro->throw = 0;
1224 sv_setsv (ERRSV, exception);
1225 croak (0);
1226 }
1227 }
1228 } 1607 }
1229} 1608}
1230 1609
1231struct transfer_args
1232{
1233 struct coro *prev, *next;
1234};
1235
1236#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1610#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1237#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1611#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1238 1612
1239/** high level stuff ********************************************************/ 1613/** high level stuff ********************************************************/
1240 1614
1241static int 1615static int
1242coro_state_destroy (pTHX_ struct coro *coro) 1616coro_state_destroy (pTHX_ struct coro *coro)
1243{ 1617{
1244 if (coro->flags & CF_DESTROYED) 1618 if (coro->flags & CF_DESTROYED)
1245 return 0; 1619 return 0;
1620
1621 if (coro->on_destroy && !PL_dirty)
1622 coro->on_destroy (aTHX_ coro);
1246 1623
1247 coro->flags |= CF_DESTROYED; 1624 coro->flags |= CF_DESTROYED;
1248 1625
1249 if (coro->flags & CF_READY) 1626 if (coro->flags & CF_READY)
1250 { 1627 {
1251 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1628 /* reduce nready, as destroying a ready coro effectively unreadies it */
1252 /* alternative: look through all ready queues and remove the coro */ 1629 /* alternative: look through all ready queues and remove the coro */
1253 LOCK;
1254 --coro_nready; 1630 --coro_nready;
1255 UNLOCK;
1256 } 1631 }
1257 else 1632 else
1258 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1633 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1259 1634
1260 if (coro->mainstack && coro->mainstack != main_mainstack) 1635 if (coro->mainstack
1261 { 1636 && coro->mainstack != main_mainstack
1262 struct coro temp; 1637 && coro->slot
1263 1638 && !PL_dirty)
1264 if (coro->flags & CF_RUNNING)
1265 croak ("FATAL: tried to destroy currently running coroutine");
1266
1267 save_perl (aTHX_ &temp);
1268 load_perl (aTHX_ coro); 1639 destroy_perl (aTHX_ coro);
1269
1270 coro_destroy (aTHX_ coro);
1271
1272 load_perl (aTHX_ &temp);
1273
1274 coro->slot = 0;
1275 }
1276 1640
1277 cctx_destroy (coro->cctx); 1641 cctx_destroy (coro->cctx);
1642 SvREFCNT_dec (coro->startcv);
1278 SvREFCNT_dec (coro->args); 1643 SvREFCNT_dec (coro->args);
1644 SvREFCNT_dec (CORO_THROW);
1279 1645
1280 if (coro->next) coro->next->prev = coro->prev; 1646 if (coro->next) coro->next->prev = coro->prev;
1281 if (coro->prev) coro->prev->next = coro->next; 1647 if (coro->prev) coro->prev->next = coro->next;
1282 if (coro == coro_first) coro_first = coro->next; 1648 if (coro == coro_first) coro_first = coro->next;
1283 1649
… …
1321# define MGf_DUP 0 1687# define MGf_DUP 0
1322#endif 1688#endif
1323}; 1689};
1324 1690
1325static void 1691static void
1326prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1692prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1327{ 1693{
1328 ta->prev = SvSTATE (prev_sv); 1694 ta->prev = SvSTATE (prev_sv);
1329 ta->next = SvSTATE (next_sv); 1695 ta->next = SvSTATE (next_sv);
1330 TRANSFER_CHECK (*ta); 1696 TRANSFER_CHECK (*ta);
1331} 1697}
1332 1698
1333static void 1699static void
1334api_transfer (SV *prev_sv, SV *next_sv) 1700api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1701{
1702 struct coro_transfer_args ta;
1703
1704 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1705 TRANSFER (ta, 1);
1706}
1707
1708/** Coro ********************************************************************/
1709
1710INLINE void
1711coro_enq (pTHX_ struct coro *coro)
1712{
1713 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1714
1715 SvREFCNT_inc_NN (coro->hv);
1716
1717 coro->next_ready = 0;
1718 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1719 ready [1] = coro;
1720}
1721
1722INLINE struct coro *
1723coro_deq (pTHX)
1724{
1725 int prio;
1726
1727 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1728 {
1729 struct coro **ready = coro_ready [prio];
1730
1731 if (ready [0])
1732 {
1733 struct coro *coro = ready [0];
1734 ready [0] = coro->next_ready;
1735 return coro;
1736 }
1737 }
1738
1739 return 0;
1740}
1741
1742static void
1743invoke_sv_ready_hook_helper (void)
1335{ 1744{
1336 dTHX; 1745 dTHX;
1337 struct transfer_args ta; 1746 dSP;
1338 1747
1339 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1748 ENTER;
1340 TRANSFER (ta); 1749 SAVETMPS;
1341}
1342 1750
1343/** Coro ********************************************************************/ 1751 PUSHMARK (SP);
1752 PUTBACK;
1753 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1344 1754
1345static void 1755 FREETMPS;
1346coro_enq (pTHX_ SV *coro_sv) 1756 LEAVE;
1347{
1348 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1349}
1350
1351static SV *
1352coro_deq (pTHX)
1353{
1354 int prio;
1355
1356 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1357 if (AvFILLp (coro_ready [prio]) >= 0)
1358 return av_shift (coro_ready [prio]);
1359
1360 return 0;
1361} 1757}
1362 1758
1363static int 1759static int
1364api_ready (SV *coro_sv) 1760api_ready (pTHX_ SV *coro_sv)
1365{ 1761{
1366 dTHX;
1367 struct coro *coro;
1368
1369 if (SvROK (coro_sv))
1370 coro_sv = SvRV (coro_sv);
1371
1372 coro = SvSTATE (coro_sv); 1762 struct coro *coro = SvSTATE (coro_sv);
1373 1763
1374 if (coro->flags & CF_READY) 1764 if (coro->flags & CF_READY)
1375 return 0; 1765 return 0;
1376 1766
1377 coro->flags |= CF_READY; 1767 coro->flags |= CF_READY;
1378 1768
1379 LOCK; 1769 coro_enq (aTHX_ coro);
1380 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1770
1381 ++coro_nready; 1771 if (!coro_nready++)
1382 UNLOCK; 1772 if (coroapi.readyhook)
1773 coroapi.readyhook ();
1383 1774
1384 return 1; 1775 return 1;
1385} 1776}
1386 1777
1387static int 1778static int
1388api_is_ready (SV *coro_sv) 1779api_is_ready (pTHX_ SV *coro_sv)
1389{ 1780{
1390 dTHX;
1391 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1781 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1392} 1782}
1393 1783
1394static void 1784/* expects to own a reference to next->hv */
1785INLINE void
1395prepare_schedule (pTHX_ struct transfer_args *ta) 1786prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1396{ 1787{
1397 SV *prev_sv, *next_sv;
1398
1399 for (;;)
1400 {
1401 LOCK;
1402 next_sv = coro_deq (aTHX);
1403
1404 /* nothing to schedule: call the idle handler */
1405 if (expect_false (!next_sv))
1406 {
1407 dSP;
1408 UNLOCK;
1409
1410 ENTER;
1411 SAVETMPS;
1412
1413 PUSHMARK (SP);
1414 PUTBACK;
1415 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1416 SPAGAIN;
1417
1418 FREETMPS;
1419 LEAVE;
1420 continue;
1421 }
1422
1423 ta->next = SvSTATE (next_sv);
1424
1425 /* cannot transfer to destroyed coros, skip and look for next */
1426 if (expect_false (ta->next->flags & CF_DESTROYED))
1427 {
1428 UNLOCK;
1429 SvREFCNT_dec (next_sv);
1430 /* coro_nready is already taken care of by destroy */
1431 continue;
1432 }
1433
1434 --coro_nready;
1435 UNLOCK;
1436 break;
1437 }
1438
1439 /* free this only after the transfer */
1440 prev_sv = SvRV (coro_current); 1788 SV *prev_sv = SvRV (coro_current);
1789
1441 ta->prev = SvSTATE (prev_sv); 1790 ta->prev = SvSTATE_hv (prev_sv);
1791 ta->next = next;
1792
1442 TRANSFER_CHECK (*ta); 1793 TRANSFER_CHECK (*ta);
1443 assert (ta->next->flags & CF_READY); 1794
1444 ta->next->flags &= ~CF_READY;
1445 SvRV_set (coro_current, next_sv); 1795 SvRV_set (coro_current, (SV *)next->hv);
1446 1796
1447 LOCK;
1448 free_coro_mortal (aTHX); 1797 free_coro_mortal (aTHX);
1449 coro_mortal = prev_sv; 1798 coro_mortal = prev_sv;
1450 UNLOCK;
1451} 1799}
1452 1800
1453static void 1801static void
1802prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1803{
1804 for (;;)
1805 {
1806 struct coro *next = coro_deq (aTHX);
1807
1808 if (expect_true (next))
1809 {
1810 /* cannot transfer to destroyed coros, skip and look for next */
1811 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1812 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1813 else
1814 {
1815 next->flags &= ~CF_READY;
1816 --coro_nready;
1817
1818 prepare_schedule_to (aTHX_ ta, next);
1819 break;
1820 }
1821 }
1822 else
1823 {
1824 /* nothing to schedule: call the idle handler */
1825 if (SvROK (sv_idle)
1826 && SvOBJECT (SvRV (sv_idle)))
1827 {
1828 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1829 api_ready (aTHX_ SvRV (sv_idle));
1830 --coro_nready;
1831 }
1832 else
1833 {
1834 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1835 dSP;
1836
1837 ENTER;
1838 SAVETMPS;
1839
1840 PUSHMARK (SP);
1841 PUTBACK;
1842 call_sv (sv_idle, G_VOID | G_DISCARD);
1843
1844 FREETMPS;
1845 LEAVE;
1846 }
1847 }
1848 }
1849}
1850
1851INLINE void
1454prepare_cede (pTHX_ struct transfer_args *ta) 1852prepare_cede (pTHX_ struct coro_transfer_args *ta)
1455{ 1853{
1456 api_ready (coro_current); 1854 api_ready (aTHX_ coro_current);
1457 prepare_schedule (aTHX_ ta); 1855 prepare_schedule (aTHX_ ta);
1458} 1856}
1459 1857
1858INLINE void
1859prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1860{
1861 SV *prev = SvRV (coro_current);
1862
1863 if (coro_nready)
1864 {
1865 prepare_schedule (aTHX_ ta);
1866 api_ready (aTHX_ prev);
1867 }
1868 else
1869 prepare_nop (aTHX_ ta);
1870}
1871
1872static void
1873api_schedule (pTHX)
1874{
1875 struct coro_transfer_args ta;
1876
1877 prepare_schedule (aTHX_ &ta);
1878 TRANSFER (ta, 1);
1879}
1880
1881static void
1882api_schedule_to (pTHX_ SV *coro_sv)
1883{
1884 struct coro_transfer_args ta;
1885 struct coro *next = SvSTATE (coro_sv);
1886
1887 SvREFCNT_inc_NN (coro_sv);
1888 prepare_schedule_to (aTHX_ &ta, next);
1889}
1890
1460static int 1891static int
1461prepare_cede_notself (pTHX_ struct transfer_args *ta) 1892api_cede (pTHX)
1462{ 1893{
1463 if (coro_nready) 1894 struct coro_transfer_args ta;
1464 { 1895
1465 SV *prev = SvRV (coro_current);
1466 prepare_schedule (aTHX_ ta); 1896 prepare_cede (aTHX_ &ta);
1467 api_ready (prev); 1897
1898 if (expect_true (ta.prev != ta.next))
1899 {
1900 TRANSFER (ta, 1);
1468 return 1; 1901 return 1;
1469 } 1902 }
1470 else 1903 else
1471 return 0; 1904 return 0;
1472} 1905}
1473 1906
1474static void
1475api_schedule (void)
1476{
1477 dTHX;
1478 struct transfer_args ta;
1479
1480 prepare_schedule (aTHX_ &ta);
1481 TRANSFER (ta);
1482}
1483
1484static int 1907static int
1485api_cede (void) 1908api_cede_notself (pTHX)
1486{ 1909{
1487 dTHX; 1910 if (coro_nready)
1911 {
1488 struct transfer_args ta; 1912 struct coro_transfer_args ta;
1489 1913
1490 prepare_cede (aTHX_ &ta); 1914 prepare_cede_notself (aTHX_ &ta);
1491
1492 if (expect_true (ta.prev != ta.next))
1493 {
1494 TRANSFER (ta); 1915 TRANSFER (ta, 1);
1495 return 1; 1916 return 1;
1496 } 1917 }
1497 else 1918 else
1498 return 0; 1919 return 0;
1499} 1920}
1500 1921
1501static int 1922static void
1502api_cede_notself (void)
1503{
1504 dTHX;
1505 struct transfer_args ta;
1506
1507 if (prepare_cede_notself (aTHX_ &ta))
1508 {
1509 TRANSFER (ta);
1510 return 1;
1511 }
1512 else
1513 return 0;
1514}
1515
1516static void
1517api_trace (SV *coro_sv, int flags) 1923api_trace (pTHX_ SV *coro_sv, int flags)
1518{ 1924{
1519 dTHX;
1520 struct coro *coro = SvSTATE (coro_sv); 1925 struct coro *coro = SvSTATE (coro_sv);
1521 1926
1927 if (coro->flags & CF_RUNNING)
1928 croak ("cannot enable tracing on a running coroutine, caught");
1929
1522 if (flags & CC_TRACE) 1930 if (flags & CC_TRACE)
1523 { 1931 {
1524 if (!coro->cctx) 1932 if (!coro->cctx)
1525 coro->cctx = cctx_new (); 1933 coro->cctx = cctx_new_run ();
1526 else if (!(coro->cctx->flags & CC_TRACE)) 1934 else if (!(coro->cctx->flags & CC_TRACE))
1527 croak ("cannot enable tracing on coroutine with custom stack"); 1935 croak ("cannot enable tracing on coroutine with custom stack, caught");
1528 1936
1529 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1937 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1530 } 1938 }
1531 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1939 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1532 { 1940 {
… …
1537 else 1945 else
1538 coro->slot->runops = RUNOPS_DEFAULT; 1946 coro->slot->runops = RUNOPS_DEFAULT;
1539 } 1947 }
1540} 1948}
1541 1949
1950static void
1951coro_call_on_destroy (pTHX_ struct coro *coro)
1952{
1953 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1954 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1955
1956 if (on_destroyp)
1957 {
1958 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1959
1960 while (AvFILLp (on_destroy) >= 0)
1961 {
1962 dSP; /* don't disturb outer sp */
1963 SV *cb = av_pop (on_destroy);
1964
1965 PUSHMARK (SP);
1966
1967 if (statusp)
1968 {
1969 int i;
1970 AV *status = (AV *)SvRV (*statusp);
1971 EXTEND (SP, AvFILLp (status) + 1);
1972
1973 for (i = 0; i <= AvFILLp (status); ++i)
1974 PUSHs (AvARRAY (status)[i]);
1975 }
1976
1977 PUTBACK;
1978 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1979 }
1980 }
1981}
1982
1983static void
1984slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1985{
1986 int i;
1987 HV *hv = (HV *)SvRV (coro_current);
1988 AV *av = newAV ();
1989
1990 /* items are actually not so common, so optimise for this case */
1991 if (items)
1992 {
1993 av_extend (av, items - 1);
1994
1995 for (i = 0; i < items; ++i)
1996 av_push (av, SvREFCNT_inc_NN (arg [i]));
1997 }
1998
1999 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2000
2001 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2002 api_ready (aTHX_ sv_manager);
2003
2004 frame->prepare = prepare_schedule;
2005 frame->check = slf_check_repeat;
2006
2007 /* as a minor optimisation, we could unwind all stacks here */
2008 /* but that puts extra pressure on pp_slf, and is not worth much */
2009 /*coro_unwind_stacks (aTHX);*/
2010}
2011
2012/*****************************************************************************/
2013/* async pool handler */
2014
2015static int
2016slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2017{
2018 HV *hv = (HV *)SvRV (coro_current);
2019 struct coro *coro = (struct coro *)frame->data;
2020
2021 if (!coro->invoke_cb)
2022 return 1; /* loop till we have invoke */
2023 else
2024 {
2025 hv_store (hv, "desc", sizeof ("desc") - 1,
2026 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2027
2028 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2029
2030 {
2031 dSP;
2032 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2033 PUTBACK;
2034 }
2035
2036 SvREFCNT_dec (GvAV (PL_defgv));
2037 GvAV (PL_defgv) = coro->invoke_av;
2038 coro->invoke_av = 0;
2039
2040 return 0;
2041 }
2042}
2043
2044static void
2045slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2046{
2047 HV *hv = (HV *)SvRV (coro_current);
2048 struct coro *coro = SvSTATE_hv ((SV *)hv);
2049
2050 if (expect_true (coro->saved_deffh))
2051 {
2052 /* subsequent iteration */
2053 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2054 coro->saved_deffh = 0;
2055
2056 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2057 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2058 {
2059 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2060 coro->invoke_av = newAV ();
2061
2062 frame->prepare = prepare_nop;
2063 }
2064 else
2065 {
2066 av_clear (GvAV (PL_defgv));
2067 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2068
2069 coro->prio = 0;
2070
2071 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2072 api_trace (aTHX_ coro_current, 0);
2073
2074 frame->prepare = prepare_schedule;
2075 av_push (av_async_pool, SvREFCNT_inc (hv));
2076 }
2077 }
2078 else
2079 {
2080 /* first iteration, simply fall through */
2081 frame->prepare = prepare_nop;
2082 }
2083
2084 frame->check = slf_check_pool_handler;
2085 frame->data = (void *)coro;
2086}
2087
2088/*****************************************************************************/
2089/* rouse callback */
2090
2091#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2092
2093static void
2094coro_rouse_callback (pTHX_ CV *cv)
2095{
2096 dXSARGS;
2097 SV *data = (SV *)S_GENSUB_ARG;
2098
2099 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2100 {
2101 /* first call, set args */
2102 SV *coro = SvRV (data);
2103 AV *av = newAV ();
2104
2105 SvRV_set (data, (SV *)av);
2106
2107 /* better take a full copy of the arguments */
2108 while (items--)
2109 av_store (av, items, newSVsv (ST (items)));
2110
2111 api_ready (aTHX_ coro);
2112 SvREFCNT_dec (coro);
2113 }
2114
2115 XSRETURN_EMPTY;
2116}
2117
2118static int
2119slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2120{
2121 SV *data = (SV *)frame->data;
2122
2123 if (CORO_THROW)
2124 return 0;
2125
2126 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2127 return 1;
2128
2129 /* now push all results on the stack */
2130 {
2131 dSP;
2132 AV *av = (AV *)SvRV (data);
2133 int i;
2134
2135 EXTEND (SP, AvFILLp (av) + 1);
2136 for (i = 0; i <= AvFILLp (av); ++i)
2137 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2138
2139 /* we have stolen the elements, so set length to zero and free */
2140 AvFILLp (av) = -1;
2141 av_undef (av);
2142
2143 PUTBACK;
2144 }
2145
2146 return 0;
2147}
2148
2149static void
2150slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2151{
2152 SV *cb;
2153
2154 if (items)
2155 cb = arg [0];
2156 else
2157 {
2158 struct coro *coro = SvSTATE_current;
2159
2160 if (!coro->rouse_cb)
2161 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2162
2163 cb = sv_2mortal (coro->rouse_cb);
2164 coro->rouse_cb = 0;
2165 }
2166
2167 if (!SvROK (cb)
2168 || SvTYPE (SvRV (cb)) != SVt_PVCV
2169 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2170 croak ("Coro::rouse_wait called with illegal callback argument,");
2171
2172 {
2173 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2174 SV *data = (SV *)S_GENSUB_ARG;
2175
2176 frame->data = (void *)data;
2177 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2178 frame->check = slf_check_rouse_wait;
2179 }
2180}
2181
2182static SV *
2183coro_new_rouse_cb (pTHX)
2184{
2185 HV *hv = (HV *)SvRV (coro_current);
2186 struct coro *coro = SvSTATE_hv (hv);
2187 SV *data = newRV_inc ((SV *)hv);
2188 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2189
2190 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2191 SvREFCNT_dec (data); /* magicext increases the refcount */
2192
2193 SvREFCNT_dec (coro->rouse_cb);
2194 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2195
2196 return cb;
2197}
2198
2199/*****************************************************************************/
2200/* schedule-like-function opcode (SLF) */
2201
2202static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2203static const CV *slf_cv;
2204static SV **slf_argv;
2205static int slf_argc, slf_arga; /* count, allocated */
2206static I32 slf_ax; /* top of stack, for restore */
2207
2208/* this restores the stack in the case we patched the entersub, to */
2209/* recreate the stack frame as perl will on following calls */
2210/* since entersub cleared the stack */
2211static OP *
2212pp_restore (pTHX)
2213{
2214 int i;
2215 SV **SP = PL_stack_base + slf_ax;
2216
2217 PUSHMARK (SP);
2218
2219 EXTEND (SP, slf_argc + 1);
2220
2221 for (i = 0; i < slf_argc; ++i)
2222 PUSHs (sv_2mortal (slf_argv [i]));
2223
2224 PUSHs ((SV *)CvGV (slf_cv));
2225
2226 RETURNOP (slf_restore.op_first);
2227}
2228
2229static void
2230slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2231{
2232 SV **arg = (SV **)slf_frame.data;
2233
2234 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2235}
2236
2237static void
2238slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2239{
2240 if (items != 2)
2241 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2242
2243 frame->prepare = slf_prepare_transfer;
2244 frame->check = slf_check_nop;
2245 frame->data = (void *)arg; /* let's hope it will stay valid */
2246}
2247
2248static void
2249slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2250{
2251 frame->prepare = prepare_schedule;
2252 frame->check = slf_check_nop;
2253}
2254
2255static void
2256slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2257{
2258 struct coro *next = (struct coro *)slf_frame.data;
2259
2260 SvREFCNT_inc_NN (next->hv);
2261 prepare_schedule_to (aTHX_ ta, next);
2262}
2263
2264static void
2265slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2266{
2267 if (!items)
2268 croak ("Coro::schedule_to expects a coroutine argument, caught");
2269
2270 frame->data = (void *)SvSTATE (arg [0]);
2271 frame->prepare = slf_prepare_schedule_to;
2272 frame->check = slf_check_nop;
2273}
2274
2275static void
2276slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2277{
2278 api_ready (aTHX_ SvRV (coro_current));
2279
2280 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2281}
2282
2283static void
2284slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2285{
2286 frame->prepare = prepare_cede;
2287 frame->check = slf_check_nop;
2288}
2289
2290static void
2291slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2292{
2293 frame->prepare = prepare_cede_notself;
2294 frame->check = slf_check_nop;
2295}
2296
2297/*
2298 * these not obviously related functions are all rolled into one
2299 * function to increase chances that they all will call transfer with the same
2300 * stack offset
2301 * SLF stands for "schedule-like-function".
2302 */
2303static OP *
2304pp_slf (pTHX)
2305{
2306 I32 checkmark; /* mark SP to see how many elements check has pushed */
2307
2308 /* set up the slf frame, unless it has already been set-up */
2309 /* the latter happens when a new coro has been started */
2310 /* or when a new cctx was attached to an existing coroutine */
2311 if (expect_true (!slf_frame.prepare))
2312 {
2313 /* first iteration */
2314 dSP;
2315 SV **arg = PL_stack_base + TOPMARK + 1;
2316 int items = SP - arg; /* args without function object */
2317 SV *gv = *sp;
2318
2319 /* do a quick consistency check on the "function" object, and if it isn't */
2320 /* for us, divert to the real entersub */
2321 if (SvTYPE (gv) != SVt_PVGV
2322 || !GvCV (gv)
2323 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2324 return PL_ppaddr[OP_ENTERSUB](aTHX);
2325
2326 if (!(PL_op->op_flags & OPf_STACKED))
2327 {
2328 /* ampersand-form of call, use @_ instead of stack */
2329 AV *av = GvAV (PL_defgv);
2330 arg = AvARRAY (av);
2331 items = AvFILLp (av) + 1;
2332 }
2333
2334 /* now call the init function, which needs to set up slf_frame */
2335 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2336 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2337
2338 /* pop args */
2339 SP = PL_stack_base + POPMARK;
2340
2341 PUTBACK;
2342 }
2343
2344 /* now that we have a slf_frame, interpret it! */
2345 /* we use a callback system not to make the code needlessly */
2346 /* complicated, but so we can run multiple perl coros from one cctx */
2347
2348 do
2349 {
2350 struct coro_transfer_args ta;
2351
2352 slf_frame.prepare (aTHX_ &ta);
2353 TRANSFER (ta, 0);
2354
2355 checkmark = PL_stack_sp - PL_stack_base;
2356 }
2357 while (slf_frame.check (aTHX_ &slf_frame));
2358
2359 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2360
2361 /* exception handling */
2362 if (expect_false (CORO_THROW))
2363 {
2364 SV *exception = sv_2mortal (CORO_THROW);
2365
2366 CORO_THROW = 0;
2367 sv_setsv (ERRSV, exception);
2368 croak (0);
2369 }
2370
2371 /* return value handling - mostly like entersub */
2372 /* make sure we put something on the stack in scalar context */
2373 if (GIMME_V == G_SCALAR)
2374 {
2375 dSP;
2376 SV **bot = PL_stack_base + checkmark;
2377
2378 if (sp == bot) /* too few, push undef */
2379 bot [1] = &PL_sv_undef;
2380 else if (sp != bot + 1) /* too many, take last one */
2381 bot [1] = *sp;
2382
2383 SP = bot + 1;
2384
2385 PUTBACK;
2386 }
2387
2388 return NORMAL;
2389}
2390
2391static void
2392api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2393{
2394 int i;
2395 SV **arg = PL_stack_base + ax;
2396 int items = PL_stack_sp - arg + 1;
2397
2398 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2399
2400 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2401 && PL_op->op_ppaddr != pp_slf)
2402 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2403
2404 CvFLAGS (cv) |= CVf_SLF;
2405 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2406 slf_cv = cv;
2407
2408 /* we patch the op, and then re-run the whole call */
2409 /* we have to put the same argument on the stack for this to work */
2410 /* and this will be done by pp_restore */
2411 slf_restore.op_next = (OP *)&slf_restore;
2412 slf_restore.op_type = OP_CUSTOM;
2413 slf_restore.op_ppaddr = pp_restore;
2414 slf_restore.op_first = PL_op;
2415
2416 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2417
2418 if (PL_op->op_flags & OPf_STACKED)
2419 {
2420 if (items > slf_arga)
2421 {
2422 slf_arga = items;
2423 free (slf_argv);
2424 slf_argv = malloc (slf_arga * sizeof (SV *));
2425 }
2426
2427 slf_argc = items;
2428
2429 for (i = 0; i < items; ++i)
2430 slf_argv [i] = SvREFCNT_inc (arg [i]);
2431 }
2432 else
2433 slf_argc = 0;
2434
2435 PL_op->op_ppaddr = pp_slf;
2436 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2437
2438 PL_op = (OP *)&slf_restore;
2439}
2440
2441/*****************************************************************************/
2442/* dynamic wind */
2443
2444static void
2445on_enterleave_call (pTHX_ SV *cb)
2446{
2447 dSP;
2448
2449 PUSHSTACK;
2450
2451 PUSHMARK (SP);
2452 PUTBACK;
2453 call_sv (cb, G_VOID | G_DISCARD);
2454 SPAGAIN;
2455
2456 POPSTACK;
2457}
2458
2459static SV *
2460coro_avp_pop_and_free (pTHX_ AV **avp)
2461{
2462 AV *av = *avp;
2463 SV *res = av_pop (av);
2464
2465 if (AvFILLp (av) < 0)
2466 {
2467 *avp = 0;
2468 SvREFCNT_dec (av);
2469 }
2470
2471 return res;
2472}
2473
2474static void
2475coro_pop_on_enter (pTHX_ void *coro)
2476{
2477 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2478 SvREFCNT_dec (cb);
2479}
2480
2481static void
2482coro_pop_on_leave (pTHX_ void *coro)
2483{
2484 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2485 on_enterleave_call (aTHX_ sv_2mortal (cb));
2486}
2487
2488/*****************************************************************************/
2489/* PerlIO::cede */
2490
2491typedef struct
2492{
2493 PerlIOBuf base;
2494 NV next, every;
2495} PerlIOCede;
2496
2497static IV
2498PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2499{
2500 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2501
2502 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2503 self->next = nvtime () + self->every;
2504
2505 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2506}
2507
2508static SV *
2509PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2510{
2511 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2512
2513 return newSVnv (self->every);
2514}
2515
2516static IV
2517PerlIOCede_flush (pTHX_ PerlIO *f)
2518{
2519 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2520 double now = nvtime ();
2521
2522 if (now >= self->next)
2523 {
2524 api_cede (aTHX);
2525 self->next = now + self->every;
2526 }
2527
2528 return PerlIOBuf_flush (aTHX_ f);
2529}
2530
2531static PerlIO_funcs PerlIO_cede =
2532{
2533 sizeof(PerlIO_funcs),
2534 "cede",
2535 sizeof(PerlIOCede),
2536 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2537 PerlIOCede_pushed,
2538 PerlIOBuf_popped,
2539 PerlIOBuf_open,
2540 PerlIOBase_binmode,
2541 PerlIOCede_getarg,
2542 PerlIOBase_fileno,
2543 PerlIOBuf_dup,
2544 PerlIOBuf_read,
2545 PerlIOBuf_unread,
2546 PerlIOBuf_write,
2547 PerlIOBuf_seek,
2548 PerlIOBuf_tell,
2549 PerlIOBuf_close,
2550 PerlIOCede_flush,
2551 PerlIOBuf_fill,
2552 PerlIOBase_eof,
2553 PerlIOBase_error,
2554 PerlIOBase_clearerr,
2555 PerlIOBase_setlinebuf,
2556 PerlIOBuf_get_base,
2557 PerlIOBuf_bufsiz,
2558 PerlIOBuf_get_ptr,
2559 PerlIOBuf_get_cnt,
2560 PerlIOBuf_set_ptrcnt,
2561};
2562
2563/*****************************************************************************/
2564/* Coro::Semaphore & Coro::Signal */
2565
2566static SV *
2567coro_waitarray_new (pTHX_ int count)
2568{
2569 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2570 AV *av = newAV ();
2571 SV **ary;
2572
2573 /* unfortunately, building manually saves memory */
2574 Newx (ary, 2, SV *);
2575 AvALLOC (av) = ary;
2576#if PERL_VERSION_ATLEAST (5,10,0)
2577 AvARRAY (av) = ary;
2578#else
2579 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2580 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2581 SvPVX ((SV *)av) = (char *)ary;
2582#endif
2583 AvMAX (av) = 1;
2584 AvFILLp (av) = 0;
2585 ary [0] = newSViv (count);
2586
2587 return newRV_noinc ((SV *)av);
2588}
2589
2590/* semaphore */
2591
2592static void
2593coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2594{
2595 SV *count_sv = AvARRAY (av)[0];
2596 IV count = SvIVX (count_sv);
2597
2598 count += adjust;
2599 SvIVX (count_sv) = count;
2600
2601 /* now wake up as many waiters as are expected to lock */
2602 while (count > 0 && AvFILLp (av) > 0)
2603 {
2604 SV *cb;
2605
2606 /* swap first two elements so we can shift a waiter */
2607 AvARRAY (av)[0] = AvARRAY (av)[1];
2608 AvARRAY (av)[1] = count_sv;
2609 cb = av_shift (av);
2610
2611 if (SvOBJECT (cb))
2612 {
2613 api_ready (aTHX_ cb);
2614 --count;
2615 }
2616 else if (SvTYPE (cb) == SVt_PVCV)
2617 {
2618 dSP;
2619 PUSHMARK (SP);
2620 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2621 PUTBACK;
2622 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2623 }
2624
2625 SvREFCNT_dec (cb);
2626 }
2627}
2628
2629static void
2630coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2631{
2632 /* call $sem->adjust (0) to possibly wake up some other waiters */
2633 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2634}
2635
2636static int
2637slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2638{
2639 AV *av = (AV *)frame->data;
2640 SV *count_sv = AvARRAY (av)[0];
2641
2642 /* if we are about to throw, don't actually acquire the lock, just throw */
2643 if (CORO_THROW)
2644 return 0;
2645 else if (SvIVX (count_sv) > 0)
2646 {
2647 SvSTATE_current->on_destroy = 0;
2648
2649 if (acquire)
2650 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2651 else
2652 coro_semaphore_adjust (aTHX_ av, 0);
2653
2654 return 0;
2655 }
2656 else
2657 {
2658 int i;
2659 /* if we were woken up but can't down, we look through the whole */
2660 /* waiters list and only add us if we aren't in there already */
2661 /* this avoids some degenerate memory usage cases */
2662
2663 for (i = 1; i <= AvFILLp (av); ++i)
2664 if (AvARRAY (av)[i] == SvRV (coro_current))
2665 return 1;
2666
2667 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2668 return 1;
2669 }
2670}
2671
2672static int
2673slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2674{
2675 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2676}
2677
2678static int
2679slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2680{
2681 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2682}
2683
2684static void
2685slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2686{
2687 AV *av = (AV *)SvRV (arg [0]);
2688
2689 if (SvIVX (AvARRAY (av)[0]) > 0)
2690 {
2691 frame->data = (void *)av;
2692 frame->prepare = prepare_nop;
2693 }
2694 else
2695 {
2696 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2697
2698 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2699 frame->prepare = prepare_schedule;
2700
2701 /* to avoid race conditions when a woken-up coro gets terminated */
2702 /* we arrange for a temporary on_destroy that calls adjust (0) */
2703 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2704 }
2705}
2706
2707static void
2708slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2709{
2710 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2711 frame->check = slf_check_semaphore_down;
2712}
2713
2714static void
2715slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2716{
2717 if (items >= 2)
2718 {
2719 /* callback form */
2720 AV *av = (AV *)SvRV (arg [0]);
2721 SV *cb_cv = s_get_cv_croak (arg [1]);
2722
2723 av_push (av, SvREFCNT_inc_NN (cb_cv));
2724
2725 if (SvIVX (AvARRAY (av)[0]) > 0)
2726 coro_semaphore_adjust (aTHX_ av, 0);
2727
2728 frame->prepare = prepare_nop;
2729 frame->check = slf_check_nop;
2730 }
2731 else
2732 {
2733 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2734 frame->check = slf_check_semaphore_wait;
2735 }
2736}
2737
2738/* signal */
2739
2740static void
2741coro_signal_wake (pTHX_ AV *av, int count)
2742{
2743 SvIVX (AvARRAY (av)[0]) = 0;
2744
2745 /* now signal count waiters */
2746 while (count > 0 && AvFILLp (av) > 0)
2747 {
2748 SV *cb;
2749
2750 /* swap first two elements so we can shift a waiter */
2751 cb = AvARRAY (av)[0];
2752 AvARRAY (av)[0] = AvARRAY (av)[1];
2753 AvARRAY (av)[1] = cb;
2754
2755 cb = av_shift (av);
2756
2757 if (SvTYPE (cb) == SVt_PVCV)
2758 {
2759 dSP;
2760 PUSHMARK (SP);
2761 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2762 PUTBACK;
2763 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2764 }
2765 else
2766 {
2767 api_ready (aTHX_ cb);
2768 sv_setiv (cb, 0); /* signal waiter */
2769 }
2770
2771 SvREFCNT_dec (cb);
2772
2773 --count;
2774 }
2775}
2776
2777static int
2778slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2779{
2780 /* if we are about to throw, also stop waiting */
2781 return SvROK ((SV *)frame->data) && !CORO_THROW;
2782}
2783
2784static void
2785slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2786{
2787 AV *av = (AV *)SvRV (arg [0]);
2788
2789 if (items >= 2)
2790 {
2791 SV *cb_cv = s_get_cv_croak (arg [1]);
2792 av_push (av, SvREFCNT_inc_NN (cb_cv));
2793
2794 if (SvIVX (AvARRAY (av)[0]))
2795 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2796
2797 frame->prepare = prepare_nop;
2798 frame->check = slf_check_nop;
2799 }
2800 else if (SvIVX (AvARRAY (av)[0]))
2801 {
2802 SvIVX (AvARRAY (av)[0]) = 0;
2803 frame->prepare = prepare_nop;
2804 frame->check = slf_check_nop;
2805 }
2806 else
2807 {
2808 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2809
2810 av_push (av, waiter);
2811
2812 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2813 frame->prepare = prepare_schedule;
2814 frame->check = slf_check_signal_wait;
2815 }
2816}
2817
2818/*****************************************************************************/
2819/* Coro::AIO */
2820
2821#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2822
2823/* helper storage struct */
2824struct io_state
2825{
2826 int errorno;
2827 I32 laststype; /* U16 in 5.10.0 */
2828 int laststatval;
2829 Stat_t statcache;
2830};
2831
2832static void
2833coro_aio_callback (pTHX_ CV *cv)
2834{
2835 dXSARGS;
2836 AV *state = (AV *)S_GENSUB_ARG;
2837 SV *coro = av_pop (state);
2838 SV *data_sv = newSV (sizeof (struct io_state));
2839
2840 av_extend (state, items - 1);
2841
2842 sv_upgrade (data_sv, SVt_PV);
2843 SvCUR_set (data_sv, sizeof (struct io_state));
2844 SvPOK_only (data_sv);
2845
2846 {
2847 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2848
2849 data->errorno = errno;
2850 data->laststype = PL_laststype;
2851 data->laststatval = PL_laststatval;
2852 data->statcache = PL_statcache;
2853 }
2854
2855 /* now build the result vector out of all the parameters and the data_sv */
2856 {
2857 int i;
2858
2859 for (i = 0; i < items; ++i)
2860 av_push (state, SvREFCNT_inc_NN (ST (i)));
2861 }
2862
2863 av_push (state, data_sv);
2864
2865 api_ready (aTHX_ coro);
2866 SvREFCNT_dec (coro);
2867 SvREFCNT_dec ((AV *)state);
2868}
2869
2870static int
2871slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2872{
2873 AV *state = (AV *)frame->data;
2874
2875 /* if we are about to throw, return early */
2876 /* this does not cancel the aio request, but at least */
2877 /* it quickly returns */
2878 if (CORO_THROW)
2879 return 0;
2880
2881 /* one element that is an RV? repeat! */
2882 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2883 return 1;
2884
2885 /* restore status */
2886 {
2887 SV *data_sv = av_pop (state);
2888 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2889
2890 errno = data->errorno;
2891 PL_laststype = data->laststype;
2892 PL_laststatval = data->laststatval;
2893 PL_statcache = data->statcache;
2894
2895 SvREFCNT_dec (data_sv);
2896 }
2897
2898 /* push result values */
2899 {
2900 dSP;
2901 int i;
2902
2903 EXTEND (SP, AvFILLp (state) + 1);
2904 for (i = 0; i <= AvFILLp (state); ++i)
2905 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2906
2907 PUTBACK;
2908 }
2909
2910 return 0;
2911}
2912
2913static void
2914slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2915{
2916 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2917 SV *coro_hv = SvRV (coro_current);
2918 struct coro *coro = SvSTATE_hv (coro_hv);
2919
2920 /* put our coroutine id on the state arg */
2921 av_push (state, SvREFCNT_inc_NN (coro_hv));
2922
2923 /* first see whether we have a non-zero priority and set it as AIO prio */
2924 if (coro->prio)
2925 {
2926 dSP;
2927
2928 static SV *prio_cv;
2929 static SV *prio_sv;
2930
2931 if (expect_false (!prio_cv))
2932 {
2933 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2934 prio_sv = newSViv (0);
2935 }
2936
2937 PUSHMARK (SP);
2938 sv_setiv (prio_sv, coro->prio);
2939 XPUSHs (prio_sv);
2940
2941 PUTBACK;
2942 call_sv (prio_cv, G_VOID | G_DISCARD);
2943 }
2944
2945 /* now call the original request */
2946 {
2947 dSP;
2948 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2949 int i;
2950
2951 PUSHMARK (SP);
2952
2953 /* first push all args to the stack */
2954 EXTEND (SP, items + 1);
2955
2956 for (i = 0; i < items; ++i)
2957 PUSHs (arg [i]);
2958
2959 /* now push the callback closure */
2960 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2961
2962 /* now call the AIO function - we assume our request is uncancelable */
2963 PUTBACK;
2964 call_sv ((SV *)req, G_VOID | G_DISCARD);
2965 }
2966
2967 /* now that the requets is going, we loop toll we have a result */
2968 frame->data = (void *)state;
2969 frame->prepare = prepare_schedule;
2970 frame->check = slf_check_aio_req;
2971}
2972
2973static void
2974coro_aio_req_xs (pTHX_ CV *cv)
2975{
2976 dXSARGS;
2977
2978 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2979
2980 XSRETURN_EMPTY;
2981}
2982
2983/*****************************************************************************/
2984
2985#if CORO_CLONE
2986# include "clone.c"
2987#endif
2988
2989/*****************************************************************************/
2990
2991static SV *
2992coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2993{
2994 SV *coro_sv;
2995 struct coro *coro;
2996 MAGIC *mg;
2997 HV *hv;
2998 SV *cb;
2999 int i;
3000
3001 if (argc > 0)
3002 {
3003 cb = s_get_cv_croak (argv [0]);
3004
3005 if (!is_coro)
3006 {
3007 if (CvISXSUB (cb))
3008 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3009
3010 if (!CvROOT (cb))
3011 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3012 }
3013 }
3014
3015 Newz (0, coro, 1, struct coro);
3016 coro->args = newAV ();
3017 coro->flags = CF_NEW;
3018
3019 if (coro_first) coro_first->prev = coro;
3020 coro->next = coro_first;
3021 coro_first = coro;
3022
3023 coro->hv = hv = newHV ();
3024 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3025 mg->mg_flags |= MGf_DUP;
3026 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3027
3028 if (argc > 0)
3029 {
3030 av_extend (coro->args, argc + is_coro - 1);
3031
3032 if (is_coro)
3033 {
3034 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3035 cb = (SV *)cv_coro_run;
3036 }
3037
3038 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3039
3040 for (i = 1; i < argc; i++)
3041 av_push (coro->args, newSVsv (argv [i]));
3042 }
3043
3044 return coro_sv;
3045}
3046
1542MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3047MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1543 3048
1544PROTOTYPES: DISABLE 3049PROTOTYPES: DISABLE
1545 3050
1546BOOT: 3051BOOT:
1547{ 3052{
1548#ifdef USE_ITHREADS 3053#ifdef USE_ITHREADS
1549 MUTEX_INIT (&coro_mutex); 3054# if CORO_PTHREAD
3055 coro_thx = PERL_GET_CONTEXT;
3056# endif
1550#endif 3057#endif
1551 BOOT_PAGESIZE; 3058 BOOT_PAGESIZE;
1552 3059
3060 cctx_current = cctx_new_empty ();
3061
1553 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3062 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1554 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3063 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1555 3064
1556 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 3065 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1557 PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3066 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1558 orig_sigelem_set = PL_vtbl_sigelem.svt_set; 3067 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1559 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1560 3068
1561 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 3069 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1562 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 3070 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1563 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 3071 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1564 3072
… …
1573 main_top_env = PL_top_env; 3081 main_top_env = PL_top_env;
1574 3082
1575 while (main_top_env->je_prev) 3083 while (main_top_env->je_prev)
1576 main_top_env = main_top_env->je_prev; 3084 main_top_env = main_top_env->je_prev;
1577 3085
3086 {
3087 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3088
3089 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3090 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3091
3092 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3093 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3094 }
3095
1578 coroapi.ver = CORO_API_VERSION; 3096 coroapi.ver = CORO_API_VERSION;
1579 coroapi.rev = CORO_API_REVISION; 3097 coroapi.rev = CORO_API_REVISION;
3098
1580 coroapi.transfer = api_transfer; 3099 coroapi.transfer = api_transfer;
1581 3100
3101 coroapi.sv_state = SvSTATE_;
3102 coroapi.execute_slf = api_execute_slf;
3103 coroapi.prepare_nop = prepare_nop;
3104 coroapi.prepare_schedule = prepare_schedule;
3105 coroapi.prepare_cede = prepare_cede;
3106 coroapi.prepare_cede_notself = prepare_cede_notself;
3107
3108 {
3109 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3110
3111 if (!svp) croak ("Time::HiRes is required");
3112 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3113
3114 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3115
3116 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3117 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3118 }
3119
1582 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3120 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1583} 3121}
1584 3122
1585SV * 3123SV *
1586new (char *klass, ...) 3124new (SV *klass, ...)
3125 ALIAS:
3126 Coro::new = 1
1587 CODE: 3127 CODE:
1588{ 3128 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1589 struct coro *coro; 3129 OUTPUT:
1590 MAGIC *mg;
1591 HV *hv;
1592 int i;
1593
1594 Newz (0, coro, 1, struct coro);
1595 coro->args = newAV ();
1596 coro->flags = CF_NEW;
1597
1598 if (coro_first) coro_first->prev = coro;
1599 coro->next = coro_first;
1600 coro_first = coro;
1601
1602 coro->hv = hv = newHV ();
1603 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1604 mg->mg_flags |= MGf_DUP;
1605 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1606
1607 av_extend (coro->args, items - 1);
1608 for (i = 1; i < items; i++)
1609 av_push (coro->args, newSVsv (ST (i)));
1610}
1611 OUTPUT:
1612 RETVAL 3130 RETVAL
1613 3131
1614# these not obviously related functions are all rolled into the same xs
1615# function to increase chances that they all will call transfer with the same
1616# stack offset
1617void 3132void
1618_set_stacklevel (...) 3133transfer (...)
1619 ALIAS: 3134 PROTOTYPE: $$
1620 Coro::State::transfer = 1 3135 CODE:
1621 Coro::schedule = 2 3136 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1622 Coro::cede = 3
1623 Coro::cede_notself = 4
1624 CODE:
1625{
1626 struct transfer_args ta;
1627
1628 PUTBACK;
1629 switch (ix)
1630 {
1631 case 0:
1632 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1633 ta.next = 0;
1634 break;
1635
1636 case 1:
1637 if (items != 2)
1638 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1639
1640 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1641 break;
1642
1643 case 2:
1644 prepare_schedule (aTHX_ &ta);
1645 break;
1646
1647 case 3:
1648 prepare_cede (aTHX_ &ta);
1649 break;
1650
1651 case 4:
1652 if (!prepare_cede_notself (aTHX_ &ta))
1653 XSRETURN_EMPTY;
1654
1655 break;
1656 }
1657 SPAGAIN;
1658
1659 BARRIER;
1660 PUTBACK;
1661 TRANSFER (ta);
1662 SPAGAIN; /* might be the sp of a different coroutine now */
1663 /* be extra careful not to ever do anything after TRANSFER */
1664}
1665 3137
1666bool 3138bool
1667_destroy (SV *coro_sv) 3139_destroy (SV *coro_sv)
1668 CODE: 3140 CODE:
1669 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3141 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1670 OUTPUT: 3142 OUTPUT:
1671 RETVAL 3143 RETVAL
1672 3144
1673void 3145void
1674_exit (code) 3146_exit (int code)
1675 int code
1676 PROTOTYPE: $ 3147 PROTOTYPE: $
1677 CODE: 3148 CODE:
1678 _exit (code); 3149 _exit (code);
1679 3150
3151SV *
3152clone (Coro::State coro)
3153 CODE:
3154{
3155#if CORO_CLONE
3156 struct coro *ncoro = coro_clone (aTHX_ coro);
3157 MAGIC *mg;
3158 /* TODO: too much duplication */
3159 ncoro->hv = newHV ();
3160 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3161 mg->mg_flags |= MGf_DUP;
3162 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3163#else
3164 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3165#endif
3166}
3167 OUTPUT:
3168 RETVAL
3169
1680int 3170int
1681cctx_stacksize (int new_stacksize = 0) 3171cctx_stacksize (int new_stacksize = 0)
3172 PROTOTYPE: ;$
1682 CODE: 3173 CODE:
1683 RETVAL = coro_stacksize; 3174 RETVAL = cctx_stacksize;
1684 if (new_stacksize) 3175 if (new_stacksize)
3176 {
1685 coro_stacksize = new_stacksize; 3177 cctx_stacksize = new_stacksize;
3178 ++cctx_gen;
3179 }
1686 OUTPUT: 3180 OUTPUT:
1687 RETVAL 3181 RETVAL
1688 3182
1689int 3183int
3184cctx_max_idle (int max_idle = 0)
3185 PROTOTYPE: ;$
3186 CODE:
3187 RETVAL = cctx_max_idle;
3188 if (max_idle > 1)
3189 cctx_max_idle = max_idle;
3190 OUTPUT:
3191 RETVAL
3192
3193int
1690cctx_count () 3194cctx_count ()
3195 PROTOTYPE:
1691 CODE: 3196 CODE:
1692 RETVAL = cctx_count; 3197 RETVAL = cctx_count;
1693 OUTPUT: 3198 OUTPUT:
1694 RETVAL 3199 RETVAL
1695 3200
1696int 3201int
1697cctx_idle () 3202cctx_idle ()
3203 PROTOTYPE:
1698 CODE: 3204 CODE:
1699 RETVAL = cctx_idle; 3205 RETVAL = cctx_idle;
1700 OUTPUT: 3206 OUTPUT:
1701 RETVAL 3207 RETVAL
1702 3208
1703void 3209void
1704list () 3210list ()
3211 PROTOTYPE:
1705 PPCODE: 3212 PPCODE:
1706{ 3213{
1707 struct coro *coro; 3214 struct coro *coro;
1708 for (coro = coro_first; coro; coro = coro->next) 3215 for (coro = coro_first; coro; coro = coro->next)
1709 if (coro->hv) 3216 if (coro->hv)
… …
1714call (Coro::State coro, SV *coderef) 3221call (Coro::State coro, SV *coderef)
1715 ALIAS: 3222 ALIAS:
1716 eval = 1 3223 eval = 1
1717 CODE: 3224 CODE:
1718{ 3225{
1719 if (coro->mainstack) 3226 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1720 { 3227 {
1721 struct coro temp; 3228 struct coro *current = SvSTATE_current;
1722 3229
1723 if (!(coro->flags & CF_RUNNING)) 3230 if (current != coro)
1724 { 3231 {
1725 PUTBACK; 3232 PUTBACK;
1726 save_perl (aTHX_ &temp); 3233 save_perl (aTHX_ current);
1727 load_perl (aTHX_ coro); 3234 load_perl (aTHX_ coro);
3235 SPAGAIN;
1728 } 3236 }
1729 3237
1730 {
1731 dSP;
1732 ENTER;
1733 SAVETMPS;
1734 PUTBACK;
1735 PUSHSTACK; 3238 PUSHSTACK;
3239
1736 PUSHMARK (SP); 3240 PUSHMARK (SP);
3241 PUTBACK;
1737 3242
1738 if (ix) 3243 if (ix)
1739 eval_sv (coderef, 0); 3244 eval_sv (coderef, 0);
1740 else 3245 else
1741 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3246 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1742 3247
1743 POPSTACK; 3248 POPSTACK;
1744 SPAGAIN; 3249 SPAGAIN;
1745 FREETMPS;
1746 LEAVE;
1747 PUTBACK;
1748 }
1749 3250
1750 if (!(coro->flags & CF_RUNNING)) 3251 if (current != coro)
1751 { 3252 {
3253 PUTBACK;
1752 save_perl (aTHX_ coro); 3254 save_perl (aTHX_ coro);
1753 load_perl (aTHX_ &temp); 3255 load_perl (aTHX_ current);
1754 SPAGAIN; 3256 SPAGAIN;
1755 } 3257 }
1756 } 3258 }
1757} 3259}
1758 3260
… …
1762 ALIAS: 3264 ALIAS:
1763 is_ready = CF_READY 3265 is_ready = CF_READY
1764 is_running = CF_RUNNING 3266 is_running = CF_RUNNING
1765 is_new = CF_NEW 3267 is_new = CF_NEW
1766 is_destroyed = CF_DESTROYED 3268 is_destroyed = CF_DESTROYED
3269 is_suspended = CF_SUSPENDED
1767 CODE: 3270 CODE:
1768 RETVAL = boolSV (coro->flags & ix); 3271 RETVAL = boolSV (coro->flags & ix);
1769 OUTPUT: 3272 OUTPUT:
1770 RETVAL 3273 RETVAL
1771 3274
1772void 3275void
3276throw (Coro::State self, SV *throw = &PL_sv_undef)
3277 PROTOTYPE: $;$
3278 CODE:
3279{
3280 struct coro *current = SvSTATE_current;
3281 SV **throwp = self == current ? &CORO_THROW : &self->except;
3282 SvREFCNT_dec (*throwp);
3283 SvGETMAGIC (throw);
3284 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3285}
3286
3287void
1773api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3288api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3289 PROTOTYPE: $;$
3290 C_ARGS: aTHX_ coro, flags
1774 3291
1775SV * 3292SV *
1776has_stack (Coro::State coro) 3293has_cctx (Coro::State coro)
1777 PROTOTYPE: $ 3294 PROTOTYPE: $
1778 CODE: 3295 CODE:
1779 RETVAL = boolSV (!!coro->cctx); 3296 /* maybe manage the running flag differently */
3297 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1780 OUTPUT: 3298 OUTPUT:
1781 RETVAL 3299 RETVAL
1782 3300
1783int 3301int
1784is_traced (Coro::State coro) 3302is_traced (Coro::State coro)
… …
1786 CODE: 3304 CODE:
1787 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3305 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1788 OUTPUT: 3306 OUTPUT:
1789 RETVAL 3307 RETVAL
1790 3308
1791IV 3309UV
1792rss (Coro::State coro) 3310rss (Coro::State coro)
1793 PROTOTYPE: $ 3311 PROTOTYPE: $
1794 ALIAS: 3312 ALIAS:
1795 usecount = 1 3313 usecount = 1
1796 CODE: 3314 CODE:
… …
1800 case 1: RETVAL = coro->usecount; break; 3318 case 1: RETVAL = coro->usecount; break;
1801 } 3319 }
1802 OUTPUT: 3320 OUTPUT:
1803 RETVAL 3321 RETVAL
1804 3322
3323void
3324force_cctx ()
3325 PROTOTYPE:
3326 CODE:
3327 cctx_current->idle_sp = 0;
3328
3329void
3330swap_defsv (Coro::State self)
3331 PROTOTYPE: $
3332 ALIAS:
3333 swap_defav = 1
3334 CODE:
3335 if (!self->slot)
3336 croak ("cannot swap state with coroutine that has no saved state,");
3337 else
3338 {
3339 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3340 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3341
3342 SV *tmp = *src; *src = *dst; *dst = tmp;
3343 }
3344
3345void
3346cancel (Coro::State self)
3347 CODE:
3348 coro_state_destroy (aTHX_ self);
3349 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3350
3351
3352SV *
3353enable_times (int enabled = enable_times)
3354 CODE:
3355{
3356 RETVAL = boolSV (enable_times);
3357
3358 if (enabled != enable_times)
3359 {
3360 enable_times = enabled;
3361
3362 coro_times_update ();
3363 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3364 }
3365}
3366 OUTPUT:
3367 RETVAL
3368
3369void
3370times (Coro::State self)
3371 PPCODE:
3372{
3373 struct coro *current = SvSTATE (coro_current);
3374
3375 if (expect_false (current == self))
3376 {
3377 coro_times_update ();
3378 coro_times_add (SvSTATE (coro_current));
3379 }
3380
3381 EXTEND (SP, 2);
3382 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3383 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3384
3385 if (expect_false (current == self))
3386 coro_times_sub (SvSTATE (coro_current));
3387}
3388
3389void
3390swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3391 CODE:
3392{
3393 struct coro *current = SvSTATE_current;
3394
3395 if (current == coro)
3396 SWAP_SVS (current);
3397
3398 if (!coro->swap_sv)
3399 coro->swap_sv = newAV ();
3400
3401 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3402 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3403
3404 if (current == coro)
3405 SWAP_SVS (current);
3406}
3407
1805 3408
1806MODULE = Coro::State PACKAGE = Coro 3409MODULE = Coro::State PACKAGE = Coro
1807 3410
1808BOOT: 3411BOOT:
1809{ 3412{
1810 int i;
1811
1812 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3413 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1813 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3414 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3415 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3416 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3417 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1814 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 3418 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3419 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3420 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3421 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1815 3422
1816 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3423 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1817 SvREADONLY_on (coro_current); 3424 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
1818 3425 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3426 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3427
1819 coro_stash = gv_stashpv ("Coro", TRUE); 3428 coro_stash = gv_stashpv ("Coro", TRUE);
1820 3429
1821 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3430 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1822 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3431 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1823 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3432 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1824 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3433 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1825 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3434 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1826 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3435 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1827
1828 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1829 coro_ready[i] = newAV ();
1830 3436
1831 { 3437 {
1832 SV *sv = perl_get_sv ("Coro::API", TRUE); 3438 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1833 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1834 3439
1835 coroapi.schedule = api_schedule; 3440 coroapi.schedule = api_schedule;
3441 coroapi.schedule_to = api_schedule_to;
1836 coroapi.cede = api_cede; 3442 coroapi.cede = api_cede;
1837 coroapi.cede_notself = api_cede_notself; 3443 coroapi.cede_notself = api_cede_notself;
1838 coroapi.ready = api_ready; 3444 coroapi.ready = api_ready;
1839 coroapi.is_ready = api_is_ready; 3445 coroapi.is_ready = api_is_ready;
1840 coroapi.nready = &coro_nready; 3446 coroapi.nready = coro_nready;
1841 coroapi.current = coro_current; 3447 coroapi.current = coro_current;
1842 3448
1843 GCoroAPI = &coroapi; 3449 /*GCoroAPI = &coroapi;*/
1844 sv_setiv (sv, (IV)&coroapi); 3450 sv_setiv (sv, (IV)&coroapi);
1845 SvREADONLY_on (sv); 3451 SvREADONLY_on (sv);
1846 } 3452 }
1847} 3453}
3454
3455SV *
3456async (...)
3457 PROTOTYPE: &@
3458 CODE:
3459 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3460 api_ready (aTHX_ RETVAL);
3461 OUTPUT:
3462 RETVAL
3463
3464void
3465terminate (...)
3466 CODE:
3467 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3468
3469void
3470schedule (...)
3471 CODE:
3472 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3473
3474void
3475schedule_to (...)
3476 CODE:
3477 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3478
3479void
3480cede_to (...)
3481 CODE:
3482 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3483
3484void
3485cede (...)
3486 CODE:
3487 CORO_EXECUTE_SLF_XS (slf_init_cede);
3488
3489void
3490cede_notself (...)
3491 CODE:
3492 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1848 3493
1849void 3494void
1850_set_current (SV *current) 3495_set_current (SV *current)
1851 PROTOTYPE: $ 3496 PROTOTYPE: $
1852 CODE: 3497 CODE:
1853 SvREFCNT_dec (SvRV (coro_current)); 3498 SvREFCNT_dec (SvRV (coro_current));
1854 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3499 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3500
3501void
3502_set_readyhook (SV *hook)
3503 PROTOTYPE: $
3504 CODE:
3505 SvREFCNT_dec (coro_readyhook);
3506 SvGETMAGIC (hook);
3507 if (SvOK (hook))
3508 {
3509 coro_readyhook = newSVsv (hook);
3510 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3511 }
3512 else
3513 {
3514 coro_readyhook = 0;
3515 CORO_READYHOOK = 0;
3516 }
1855 3517
1856int 3518int
1857prio (Coro::State coro, int newprio = 0) 3519prio (Coro::State coro, int newprio = 0)
3520 PROTOTYPE: $;$
1858 ALIAS: 3521 ALIAS:
1859 nice = 1 3522 nice = 1
1860 CODE: 3523 CODE:
1861{ 3524{
1862 RETVAL = coro->prio; 3525 RETVAL = coro->prio;
… …
1864 if (items > 1) 3527 if (items > 1)
1865 { 3528 {
1866 if (ix) 3529 if (ix)
1867 newprio = coro->prio - newprio; 3530 newprio = coro->prio - newprio;
1868 3531
1869 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3532 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1870 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3533 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1871 3534
1872 coro->prio = newprio; 3535 coro->prio = newprio;
1873 } 3536 }
1874} 3537}
1875 OUTPUT: 3538 OUTPUT:
… …
1877 3540
1878SV * 3541SV *
1879ready (SV *self) 3542ready (SV *self)
1880 PROTOTYPE: $ 3543 PROTOTYPE: $
1881 CODE: 3544 CODE:
1882 RETVAL = boolSV (api_ready (self)); 3545 RETVAL = boolSV (api_ready (aTHX_ self));
1883 OUTPUT: 3546 OUTPUT:
1884 RETVAL 3547 RETVAL
1885 3548
1886int 3549int
1887nready (...) 3550nready (...)
… …
1890 RETVAL = coro_nready; 3553 RETVAL = coro_nready;
1891 OUTPUT: 3554 OUTPUT:
1892 RETVAL 3555 RETVAL
1893 3556
1894void 3557void
1895throw (Coro::State self, SV *throw = &PL_sv_undef) 3558suspend (Coro::State self)
1896 PROTOTYPE: $;$ 3559 PROTOTYPE: $
1897 CODE: 3560 CODE:
1898 SvREFCNT_dec (self->throw); 3561 self->flags |= CF_SUSPENDED;
1899 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1900 3562
1901# for async_pool speedup
1902void 3563void
1903_pool_1 (SV *cb) 3564resume (Coro::State self)
3565 PROTOTYPE: $
1904 CODE: 3566 CODE:
1905{ 3567 self->flags &= ~CF_SUSPENDED;
1906 struct coro *coro = SvSTATE (coro_current);
1907 HV *hv = (HV *)SvRV (coro_current);
1908 AV *defav = GvAV (PL_defgv);
1909 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1910 AV *invoke_av;
1911 int i, len;
1912 3568
1913 if (!invoke) 3569void
1914 croak ("\3async_pool terminate\2\n"); 3570_pool_handler (...)
3571 CODE:
3572 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1915 3573
1916 SvREFCNT_dec (coro->saved_deffh); 3574void
1917 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 3575async_pool (SV *cv, ...)
3576 PROTOTYPE: &@
3577 PPCODE:
3578{
3579 HV *hv = (HV *)av_pop (av_async_pool);
3580 AV *av = newAV ();
3581 SV *cb = ST (0);
3582 int i;
1918 3583
1919 hv_store (hv, "desc", sizeof ("desc") - 1, 3584 av_extend (av, items - 2);
1920 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3585 for (i = 1; i < items; ++i)
3586 av_push (av, SvREFCNT_inc_NN (ST (i)));
1921 3587
1922 invoke_av = (AV *)SvRV (invoke); 3588 if ((SV *)hv == &PL_sv_undef)
1923 len = av_len (invoke_av);
1924
1925 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1926
1927 if (len > 0)
1928 { 3589 {
1929 av_fill (defav, len - 1); 3590 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1930 for (i = 0; i < len; ++i) 3591 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1931 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3592 SvREFCNT_dec (sv);
1932 } 3593 }
1933 3594
3595 {
3596 struct coro *coro = SvSTATE_hv (hv);
3597
3598 assert (!coro->invoke_cb);
3599 assert (!coro->invoke_av);
3600 coro->invoke_cb = SvREFCNT_inc (cb);
3601 coro->invoke_av = av;
3602 }
3603
3604 api_ready (aTHX_ (SV *)hv);
3605
3606 if (GIMME_V != G_VOID)
3607 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3608 else
1934 SvREFCNT_dec (invoke); 3609 SvREFCNT_dec (hv);
1935} 3610}
1936 3611
1937void 3612SV *
1938_pool_2 (SV *cb) 3613rouse_cb ()
3614 PROTOTYPE:
1939 CODE: 3615 CODE:
1940{ 3616 RETVAL = coro_new_rouse_cb (aTHX);
1941 struct coro *coro = SvSTATE (coro_current);
1942
1943 sv_setsv (cb, &PL_sv_undef);
1944
1945 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1946 coro->saved_deffh = 0;
1947
1948 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1949 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1950 croak ("\3async_pool terminate\2\n");
1951
1952 av_clear (GvAV (PL_defgv));
1953 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1954 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1955
1956 coro->prio = 0;
1957
1958 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1959 api_trace (coro_current, 0);
1960
1961 av_push (av_async_pool, newSVsv (coro_current));
1962}
1963
1964
1965MODULE = Coro::State PACKAGE = Coro::AIO
1966
1967SV *
1968_get_state ()
1969 CODE:
1970{
1971 struct io_state *data;
1972
1973 RETVAL = newSV (sizeof (struct io_state));
1974 data = (struct io_state *)SvPVX (RETVAL);
1975 SvCUR_set (RETVAL, sizeof (struct io_state));
1976 SvPOK_only (RETVAL);
1977
1978 data->errorno = errno;
1979 data->laststype = PL_laststype;
1980 data->laststatval = PL_laststatval;
1981 data->statcache = PL_statcache;
1982}
1983 OUTPUT: 3617 OUTPUT:
1984 RETVAL 3618 RETVAL
1985 3619
1986void 3620void
1987_set_state (char *data_) 3621rouse_wait (...)
3622 PROTOTYPE: ;$
3623 PPCODE:
3624 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3625
3626void
3627on_enter (SV *block)
3628 ALIAS:
3629 on_leave = 1
1988 PROTOTYPE: $ 3630 PROTOTYPE: &
1989 CODE: 3631 CODE:
1990{ 3632{
1991 struct io_state *data = (void *)data_; 3633 struct coro *coro = SvSTATE_current;
3634 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1992 3635
1993 errno = data->errorno; 3636 block = s_get_cv_croak (block);
1994 PL_laststype = data->laststype;
1995 PL_laststatval = data->laststatval;
1996 PL_statcache = data->statcache;
1997}
1998 3637
3638 if (!*avp)
3639 *avp = newAV ();
3640
3641 av_push (*avp, SvREFCNT_inc (block));
3642
3643 if (!ix)
3644 on_enterleave_call (aTHX_ block);
3645
3646 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3647 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3648 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3649}
3650
3651
3652MODULE = Coro::State PACKAGE = PerlIO::cede
3653
3654BOOT:
3655 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3656
3657
3658MODULE = Coro::State PACKAGE = Coro::Semaphore
3659
3660SV *
3661new (SV *klass, SV *count = 0)
3662 CODE:
3663{
3664 int semcnt = 1;
3665
3666 if (count)
3667 {
3668 SvGETMAGIC (count);
3669
3670 if (SvOK (count))
3671 semcnt = SvIV (count);
3672 }
3673
3674 RETVAL = sv_bless (
3675 coro_waitarray_new (aTHX_ semcnt),
3676 GvSTASH (CvGV (cv))
3677 );
3678}
3679 OUTPUT:
3680 RETVAL
3681
3682# helper for Coro::Channel and others
3683SV *
3684_alloc (int count)
3685 CODE:
3686 RETVAL = coro_waitarray_new (aTHX_ count);
3687 OUTPUT:
3688 RETVAL
3689
3690SV *
3691count (SV *self)
3692 CODE:
3693 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3694 OUTPUT:
3695 RETVAL
3696
3697void
3698up (SV *self, int adjust = 1)
3699 ALIAS:
3700 adjust = 1
3701 CODE:
3702 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3703
3704void
3705down (...)
3706 CODE:
3707 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3708
3709void
3710wait (...)
3711 CODE:
3712 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3713
3714void
3715try (SV *self)
3716 PPCODE:
3717{
3718 AV *av = (AV *)SvRV (self);
3719 SV *count_sv = AvARRAY (av)[0];
3720 IV count = SvIVX (count_sv);
3721
3722 if (count > 0)
3723 {
3724 --count;
3725 SvIVX (count_sv) = count;
3726 XSRETURN_YES;
3727 }
3728 else
3729 XSRETURN_NO;
3730}
3731
3732void
3733waiters (SV *self)
3734 PPCODE:
3735{
3736 AV *av = (AV *)SvRV (self);
3737 int wcount = AvFILLp (av) + 1 - 1;
3738
3739 if (GIMME_V == G_SCALAR)
3740 XPUSHs (sv_2mortal (newSViv (wcount)));
3741 else
3742 {
3743 int i;
3744 EXTEND (SP, wcount);
3745 for (i = 1; i <= wcount; ++i)
3746 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3747 }
3748}
3749
3750MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3751
3752void
3753_may_delete (SV *sem, int count, int extra_refs)
3754 PPCODE:
3755{
3756 AV *av = (AV *)SvRV (sem);
3757
3758 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3759 && AvFILLp (av) == 0 /* no waiters, just count */
3760 && SvIV (AvARRAY (av)[0]) == count)
3761 XSRETURN_YES;
3762
3763 XSRETURN_NO;
3764}
3765
3766MODULE = Coro::State PACKAGE = Coro::Signal
3767
3768SV *
3769new (SV *klass)
3770 CODE:
3771 RETVAL = sv_bless (
3772 coro_waitarray_new (aTHX_ 0),
3773 GvSTASH (CvGV (cv))
3774 );
3775 OUTPUT:
3776 RETVAL
3777
3778void
3779wait (...)
3780 CODE:
3781 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3782
3783void
3784broadcast (SV *self)
3785 CODE:
3786{
3787 AV *av = (AV *)SvRV (self);
3788 coro_signal_wake (aTHX_ av, AvFILLp (av));
3789}
3790
3791void
3792send (SV *self)
3793 CODE:
3794{
3795 AV *av = (AV *)SvRV (self);
3796
3797 if (AvFILLp (av))
3798 coro_signal_wake (aTHX_ av, 1);
3799 else
3800 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3801}
3802
3803IV
3804awaited (SV *self)
3805 CODE:
3806 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3807 OUTPUT:
3808 RETVAL
3809
3810
3811MODULE = Coro::State PACKAGE = Coro::AnyEvent
3812
3813BOOT:
3814 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3815
3816void
3817_schedule (...)
3818 CODE:
3819{
3820 static int incede;
3821
3822 api_cede_notself (aTHX);
3823
3824 ++incede;
3825 while (coro_nready >= incede && api_cede (aTHX))
3826 ;
3827
3828 sv_setsv (sv_activity, &PL_sv_undef);
3829 if (coro_nready >= incede)
3830 {
3831 PUSHMARK (SP);
3832 PUTBACK;
3833 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3834 }
3835
3836 --incede;
3837}
3838
3839
3840MODULE = Coro::State PACKAGE = Coro::AIO
3841
3842void
3843_register (char *target, char *proto, SV *req)
3844 CODE:
3845{
3846 SV *req_cv = s_get_cv_croak (req);
3847 /* newXSproto doesn't return the CV on 5.8 */
3848 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3849 sv_setpv ((SV *)slf_cv, proto);
3850 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3851}
3852
3853MODULE = Coro::State PACKAGE = Coro::Select
3854
3855void
3856patch_pp_sselect ()
3857 CODE:
3858 if (!coro_old_pp_sselect)
3859 {
3860 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3861 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3862 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3863 }
3864
3865void
3866unpatch_pp_sselect ()
3867 CODE:
3868 if (coro_old_pp_sselect)
3869 {
3870 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3871 coro_old_pp_sselect = 0;
3872 }
3873
3874

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