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Comparing Coro/Coro/State.xs (file contents):
Revision 1.98 by root, Sun Nov 26 21:25:53 2006 UTC vs.
Revision 1.372 by root, Thu Oct 1 23:50:23 2009 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "schmorp.h"
8
9#if PERL_VERSION < 6
10# ifndef PL_ppaddr
11# define PL_ppaddr ppaddr
12# endif
13# ifndef call_sv
14# define call_sv perl_call_sv
15# endif
16# ifndef get_sv
17# define get_sv perl_get_sv
18# endif
19# ifndef get_cv
20# define get_cv perl_get_cv
21# endif
22# ifndef IS_PADGV
23# define IS_PADGV(v) 0
24# endif
25# ifndef IS_PADCONST
26# define IS_PADCONST(v) 0
27# endif
28#endif
29 12
30#include <stdio.h> 13#include <stdio.h>
31#include <errno.h> 14#include <errno.h>
15#include <assert.h>
32 16
33#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
34# undef STACKGUARD 18# undef setjmp
35#endif 19# undef longjmp
36 20# undef _exit
37#ifndef STACKGUARD 21# define setjmp _setjmp /* deep magic */
38# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
39#endif 24#endif
40 25
41#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
42# include <unistd.h> 27# include <unistd.h>
43# include <sys/mman.h> 28# include <sys/mman.h>
… …
52# ifndef PAGESIZE 37# ifndef PAGESIZE
53# define PAGESIZE pagesize 38# define PAGESIZE pagesize
54# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
55static long pagesize; 40static long pagesize;
56# else 41# else
57# define BOOT_PAGESIZE 42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
57# undef CORO_STACKGUARD
58#endif
59
60#ifndef CORO_STACKGUARD
61# define CORO_STACKGUARD 0
62#endif
63
64/* prefer perl internal functions over our own? */
65#ifndef CORO_PREFER_PERL_FUNCTIONS
66# define CORO_PREFER_PERL_FUNCTIONS 0
67#endif
68
69/* The next macros try to return the current stack pointer, in an as
70 * portable way as possible. */
71#if __GNUC__ >= 4
72# define dSTACKLEVEL int stacklevel_dummy
73# define STACKLEVEL __builtin_frame_address (0)
74#else
75# define dSTACKLEVEL volatile void *stacklevel
76# define STACKLEVEL ((void *)&stacklevel)
77#endif
78
79#define IN_DESTRUCT PL_dirty
80
81#if __GNUC__ >= 3
82# define attribute(x) __attribute__(x)
83# define expect(expr,value) __builtin_expect ((expr), (value))
84# define INLINE static inline
85#else
86# define attribute(x)
87# define expect(expr,value) (expr)
88# define INLINE static
89#endif
90
91#define expect_false(expr) expect ((expr) != 0, 0)
92#define expect_true(expr) expect ((expr) != 0, 1)
93
94#define NOINLINE attribute ((noinline))
95
96#include "CoroAPI.h"
97#define GCoroAPI (&coroapi) /* very sneaky */
98
99#ifdef USE_ITHREADS
100# if CORO_PTHREAD
101static void *coro_thx;
58# endif 102# endif
59#endif 103#endif
60 104
61/* The next macro should declare a variable stacklevel that contains and approximation 105#ifdef __linux
62 * to the current C stack pointer. Its property is that it changes with each call 106# include <time.h> /* for timespec */
63 * and should be unique. */ 107# include <syscall.h> /* for SYS_* */
64#define dSTACKLEVEL int stacklevel 108# ifdef SYS_clock_gettime
65#define STACKLEVEL ((void *)&stacklevel) 109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
66 110# define CORO_CLOCK_MONOTONIC 1
67#define IN_DESTRUCT (PL_main_cv == Nullcv) 111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
68 112# endif
69#include "CoroAPI.h"
70
71#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
72
73#ifdef USE_ITHREADS
74static perl_mutex coro_mutex;
75# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
76# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
77#else
78# define LOCK (void)0
79# define UNLOCK (void)0
80#endif 113#endif
81 114
115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
117
118/* we hijack an hopefully unused CV flag for our purposes */
119#define CVf_SLF 0x4000
120static OP *pp_slf (pTHX);
121
122static U32 cctx_gen;
123static size_t cctx_stacksize = CORO_STACKSIZE;
82static struct CoroAPI coroapi; 124static struct CoroAPI coroapi;
83static AV *main_mainstack; /* used to differentiate between $main and others */ 125static AV *main_mainstack; /* used to differentiate between $main and others */
126static JMPENV *main_top_env;
84static HV *coro_state_stash, *coro_stash; 127static HV *coro_state_stash, *coro_stash;
85static SV *coro_mortal; /* will be freed after next transfer */ 128static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
129
130static AV *av_destroy; /* destruction queue */
131static SV *sv_manager; /* the manager coro */
132static SV *sv_idle; /* $Coro::idle */
133
134static GV *irsgv; /* $/ */
135static GV *stdoutgv; /* *STDOUT */
136static SV *rv_diehook;
137static SV *rv_warnhook;
138static HV *hv_sig; /* %SIG */
139
140/* async_pool helper stuff */
141static SV *sv_pool_rss;
142static SV *sv_pool_size;
143static SV *sv_async_pool_idle; /* description string */
144static AV *av_async_pool; /* idle pool */
145static SV *sv_Coro; /* class string */
146static CV *cv_pool_handler;
147
148/* Coro::AnyEvent */
149static SV *sv_activity;
150
151/* enable processtime/realtime profiling */
152static char enable_times;
153typedef U32 coro_ts[2];
154static coro_ts time_real, time_cpu;
155static char times_valid;
156
157static struct coro_cctx *cctx_first;
158static int cctx_count, cctx_idle;
159
160enum {
161 CC_MAPPED = 0x01,
162 CC_NOREUSE = 0x02, /* throw this away after tracing */
163 CC_TRACE = 0x04,
164 CC_TRACE_SUB = 0x08, /* trace sub calls */
165 CC_TRACE_LINE = 0x10, /* trace each statement */
166 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
167};
86 168
87/* this is a structure representing a c-level coroutine */ 169/* this is a structure representing a c-level coroutine */
88typedef struct coro_stack { 170typedef struct coro_cctx
171{
89 struct coro_stack *next; 172 struct coro_cctx *next;
90 173
91 /* the stack */ 174 /* the stack */
92 void *sptr; 175 void *sptr;
93 long ssize; /* positive == mmap, otherwise malloc */ 176 size_t ssize;
94 177
95 /* cpu state */ 178 /* cpu state */
96 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 179 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
180 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
97 JMPENV *top_env; 181 JMPENV *top_env;
98 coro_context cctx; 182 coro_context cctx;
99} coro_stack; 183
184 U32 gen;
185#if CORO_USE_VALGRIND
186 int valgrind_id;
187#endif
188 unsigned char flags;
189} coro_cctx;
190
191coro_cctx *cctx_current; /* the currently running cctx */
192
193/*****************************************************************************/
194
195enum {
196 CF_RUNNING = 0x0001, /* coroutine is running */
197 CF_READY = 0x0002, /* coroutine is ready */
198 CF_NEW = 0x0004, /* has never been switched to */
199 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
200 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
201};
202
203/* the structure where most of the perl state is stored, overlaid on the cxstack */
204typedef struct
205{
206 SV *defsv;
207 AV *defav;
208 SV *errsv;
209 SV *irsgv;
210 HV *hinthv;
211#define VAR(name,type) type name;
212# include "state.h"
213#undef VAR
214} perl_slots;
215
216#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
100 217
101/* this is a structure representing a perl-level coroutine */ 218/* this is a structure representing a perl-level coroutine */
102struct coro { 219struct coro {
103 /* the c coroutine allocated to this perl coroutine, if any */ 220 /* the C coroutine allocated to this perl coroutine, if any */
104 coro_stack *stack; 221 coro_cctx *cctx;
105 222
106 /* data associated with this coroutine (initial args) */ 223 /* ready queue */
107 AV *args; 224 struct coro *next_ready;
108 int refcnt;
109 225
110 /* optionally saved, might be zero */ 226 /* state data */
111 AV *defav; 227 struct CoroSLF slf_frame; /* saved slf frame */
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118
119 /* the stacks and related info (callchain etc..) */
120 PERL_SI *curstackinfo;
121 AV *curstack;
122 AV *mainstack; 228 AV *mainstack;
123 SV **stack_sp; 229 perl_slots *slot; /* basically the saved sp */
124 OP *op; 230
125 SV **curpad; 231 CV *startcv; /* the CV to execute */
126 AV *comppad; 232 AV *args; /* data associated with this coroutine (initial args) */
127 CV *compcv; 233 int refcnt; /* coroutines are refcounted, yes */
128 SV **stack_base; 234 int flags; /* CF_ flags */
129 SV **stack_max; 235 HV *hv; /* the perl hash associated with this coro, if any */
130 SV **tmps_stack; 236 void (*on_destroy)(pTHX_ struct coro *coro);
131 I32 tmps_floor; 237
132 I32 tmps_ix; 238 /* statistics */
133 I32 tmps_max; 239 int usecount; /* number of transfers to this coro */
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 240
149 /* coro process data */ 241 /* coro process data */
150 int prio; 242 int prio;
243 SV *except; /* exception to be thrown */
244 SV *rouse_cb;
245
246 /* async_pool */
247 SV *saved_deffh;
248 SV *invoke_cb;
249 AV *invoke_av;
250
251 /* on_enter/on_leave */
252 AV *on_enter;
253 AV *on_leave;
254
255 /* times */
256 coro_ts t_cpu, t_real;
257
258 /* linked list */
259 struct coro *next, *prev;
151}; 260};
152 261
153typedef struct coro *Coro__State; 262typedef struct coro *Coro__State;
154typedef struct coro *Coro__State_or_hashref; 263typedef struct coro *Coro__State_or_hashref;
155 264
265/* the following variables are effectively part of the perl context */
266/* and get copied between struct coro and these variables */
267/* the mainr easonw e don't support windows process emulation */
268static struct CoroSLF slf_frame; /* the current slf frame */
269
270/** Coro ********************************************************************/
271
272#define CORO_PRIO_MAX 3
273#define CORO_PRIO_HIGH 1
274#define CORO_PRIO_NORMAL 0
275#define CORO_PRIO_LOW -1
276#define CORO_PRIO_IDLE -3
277#define CORO_PRIO_MIN -4
278
279/* for Coro.pm */
280static SV *coro_current;
281static SV *coro_readyhook;
282static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
283static CV *cv_coro_run, *cv_coro_terminate;
284static struct coro *coro_first;
285#define coro_nready coroapi.nready
286
287/** Coro::Select ************************************************************/
288
289static OP *(*coro_old_pp_sselect) (pTHX);
290static SV *coro_select_select;
291
292/* horrible hack, but if it works... */
293static OP *
294coro_pp_sselect (pTHX)
295{
296 dSP;
297 PUSHMARK (SP - 4); /* fake argument list */
298 XPUSHs (coro_select_select);
299 PUTBACK;
300
301 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
302 PL_op->op_flags |= OPf_STACKED;
303 PL_op->op_private = 0;
304 return PL_ppaddr [OP_ENTERSUB](aTHX);
305}
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
156static AV * 319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339INLINE void
340coro_times_update ()
341{
342#ifdef coro_clock_gettime
343 struct timespec ts;
344
345 ts.tv_sec = ts.tv_nsec = 0;
346 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
347 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
348
349 ts.tv_sec = ts.tv_nsec = 0;
350 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
351 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
352#else
353 dTHX;
354 UV tv[2];
355
356 u2time (aTHX_ tv);
357 time_real [0] = tv [0];
358 time_real [1] = tv [1] * 1000;
359#endif
360}
361
362INLINE void
363coro_times_add (struct coro *c)
364{
365 c->t_real [1] += time_real [1];
366 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
367 c->t_real [0] += time_real [0];
368
369 c->t_cpu [1] += time_cpu [1];
370 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
371 c->t_cpu [0] += time_cpu [0];
372}
373
374INLINE void
375coro_times_sub (struct coro *c)
376{
377 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
378 c->t_real [1] -= time_real [1];
379 c->t_real [0] -= time_real [0];
380
381 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
382 c->t_cpu [1] -= time_cpu [1];
383 c->t_cpu [0] -= time_cpu [0];
384}
385
386/*****************************************************************************/
387/* magic glue */
388
389#define CORO_MAGIC_type_cv 26
390#define CORO_MAGIC_type_state PERL_MAGIC_ext
391
392#define CORO_MAGIC_NN(sv, type) \
393 (expect_true (SvMAGIC (sv)->mg_type == type) \
394 ? SvMAGIC (sv) \
395 : mg_find (sv, type))
396
397#define CORO_MAGIC(sv, type) \
398 (expect_true (SvMAGIC (sv)) \
399 ? CORO_MAGIC_NN (sv, type) \
400 : 0)
401
402#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
403#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
404
405INLINE struct coro *
406SvSTATE_ (pTHX_ SV *coro)
407{
408 HV *stash;
409 MAGIC *mg;
410
411 if (SvROK (coro))
412 coro = SvRV (coro);
413
414 if (expect_false (SvTYPE (coro) != SVt_PVHV))
415 croak ("Coro::State object required");
416
417 stash = SvSTASH (coro);
418 if (expect_false (stash != coro_stash && stash != coro_state_stash))
419 {
420 /* very slow, but rare, check */
421 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
422 croak ("Coro::State object required");
423 }
424
425 mg = CORO_MAGIC_state (coro);
426 return (struct coro *)mg->mg_ptr;
427}
428
429#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
430
431/* faster than SvSTATE, but expects a coroutine hv */
432#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
433#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
434
435/*****************************************************************************/
436/* padlist management and caching */
437
438static AV *
157coro_clone_padlist (CV *cv) 439coro_derive_padlist (pTHX_ CV *cv)
158{ 440{
159 AV *padlist = CvPADLIST (cv); 441 AV *padlist = CvPADLIST (cv);
160 AV *newpadlist, *newpad; 442 AV *newpadlist, *newpad;
161 443
162 newpadlist = newAV (); 444 newpadlist = newAV ();
163 AvREAL_off (newpadlist); 445 AvREAL_off (newpadlist);
164#if PERL_VERSION < 9 446#if PERL_VERSION_ATLEAST (5,10,0)
447 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
448#else
165 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 449 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168#endif 450#endif
169 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 451 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170 --AvFILLp (padlist); 452 --AvFILLp (padlist);
171 453
172 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 454 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
173 av_store (newpadlist, 1, (SV *)newpad); 455 av_store (newpadlist, 1, (SV *)newpad);
174 456
175 return newpadlist; 457 return newpadlist;
176} 458}
177 459
178static void 460static void
179free_padlist (AV *padlist) 461free_padlist (pTHX_ AV *padlist)
180{ 462{
181 /* may be during global destruction */ 463 /* may be during global destruction */
182 if (SvREFCNT (padlist)) 464 if (!IN_DESTRUCT)
183 { 465 {
184 I32 i = AvFILLp (padlist); 466 I32 i = AvFILLp (padlist);
185 while (i >= 0) 467
468 while (i > 0) /* special-case index 0 */
186 { 469 {
187 SV **svp = av_fetch (padlist, i--, FALSE); 470 /* we try to be extra-careful here */
188 if (svp) 471 AV *av = (AV *)AvARRAY (padlist)[i--];
189 { 472 I32 j = AvFILLp (av);
190 SV *sv; 473
191 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 474 while (j >= 0)
475 SvREFCNT_dec (AvARRAY (av)[j--]);
476
477 AvFILLp (av) = -1;
192 SvREFCNT_dec (sv); 478 SvREFCNT_dec (av);
193
194 SvREFCNT_dec (*svp);
195 }
196 } 479 }
197 480
481 SvREFCNT_dec (AvARRAY (padlist)[0]);
482
483 AvFILLp (padlist) = -1;
198 SvREFCNT_dec ((SV*)padlist); 484 SvREFCNT_dec ((SV*)padlist);
199 } 485 }
200} 486}
201 487
202static int 488static int
203coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 489coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
204{ 490{
205 AV *padlist; 491 AV *padlist;
206 AV *av = (AV *)mg->mg_obj; 492 AV *av = (AV *)mg->mg_obj;
207 493
494 /* perl manages to free our internal AV and _then_ call us */
495 if (IN_DESTRUCT)
496 return 0;
497
208 /* casting is fun. */ 498 /* casting is fun. */
209 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 499 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210 free_padlist (padlist); 500 free_padlist (aTHX_ padlist);
211 501
212 SvREFCNT_dec (av); 502 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
213 503
214 return 0; 504 return 0;
215} 505}
216 506
217#define PERL_MAGIC_coro PERL_MAGIC_ext 507static MGVTBL coro_cv_vtbl = {
218 508 0, 0, 0, 0,
219static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 509 coro_cv_free
510};
220 511
221/* the next two functions merely cache the padlists */ 512/* the next two functions merely cache the padlists */
222static void 513static void
223get_padlist (CV *cv) 514get_padlist (pTHX_ CV *cv)
224{ 515{
225 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 516 MAGIC *mg = CORO_MAGIC_cv (cv);
517 AV *av;
226 518
227 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 519 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
228 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 520 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229 else 521 else
230 { 522 {
231#if 0 523#if CORO_PREFER_PERL_FUNCTIONS
232 /* this is probably cleaner, but also slower? */ 524 /* this is probably cleaner? but also slower! */
525 /* in practise, it seems to be less stable */
233 CV *cp = Perl_cv_clone (cv); 526 CV *cp = Perl_cv_clone (aTHX_ cv);
234 CvPADLIST (cv) = CvPADLIST (cp); 527 CvPADLIST (cv) = CvPADLIST (cp);
235 CvPADLIST (cp) = 0; 528 CvPADLIST (cp) = 0;
236 SvREFCNT_dec (cp); 529 SvREFCNT_dec (cp);
237#else 530#else
238 CvPADLIST (cv) = coro_clone_padlist (cv); 531 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
239#endif 532#endif
240 } 533 }
241} 534}
242 535
243static void 536static void
244put_padlist (CV *cv) 537put_padlist (pTHX_ CV *cv)
245{ 538{
246 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 539 MAGIC *mg = CORO_MAGIC_cv (cv);
540 AV *av;
247 541
248 if (!mg) 542 if (expect_false (!mg))
249 { 543 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
250 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252 mg->mg_virtual = &vtbl_coro;
253 mg->mg_obj = (SV *)newAV ();
254 }
255 544
256 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 545 av = (AV *)mg->mg_obj;
257}
258 546
259#define SB do { 547 if (expect_false (AvFILLp (av) >= AvMAX (av)))
260#define SE } while (0) 548 av_extend (av, AvFILLp (av) + 1);
261 549
262#define LOAD(state) load_state((state)); 550 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263#define SAVE(state,flags) save_state((state),(flags)); 551}
264 552
265#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 553/** load & save, init *******************************************************/
266 554
267static void 555static void
556on_enterleave_call (pTHX_ SV *cb);
557
558static void
268load_state(Coro__State c) 559load_perl (pTHX_ Coro__State c)
269{ 560{
270 PL_dowarn = c->dowarn; 561 perl_slots *slot = c->slot;
271 PL_in_eval = c->in_eval; 562 c->slot = 0;
272 563
273 PL_curstackinfo = c->curstackinfo;
274 PL_curstack = c->curstack;
275 PL_mainstack = c->mainstack; 564 PL_mainstack = c->mainstack;
276 PL_stack_sp = c->stack_sp;
277 PL_op = c->op;
278 PL_curpad = c->curpad;
279 PL_comppad = c->comppad;
280 PL_compcv = c->compcv;
281 PL_stack_base = c->stack_base;
282 PL_stack_max = c->stack_max;
283 PL_tmps_stack = c->tmps_stack;
284 PL_tmps_floor = c->tmps_floor;
285 PL_tmps_ix = c->tmps_ix;
286 PL_tmps_max = c->tmps_max;
287 PL_markstack = c->markstack;
288 PL_markstack_ptr = c->markstack_ptr;
289 PL_markstack_max = c->markstack_max;
290 PL_scopestack = c->scopestack;
291 PL_scopestack_ix = c->scopestack_ix;
292 PL_scopestack_max = c->scopestack_max;
293 PL_savestack = c->savestack;
294 PL_savestack_ix = c->savestack_ix;
295 PL_savestack_max = c->savestack_max;
296#if PERL_VERSION < 9
297 PL_retstack = c->retstack;
298 PL_retstack_ix = c->retstack_ix;
299 PL_retstack_max = c->retstack_max;
300#endif
301 PL_curpm = c->curpm;
302 PL_curcop = c->curcop;
303 565
304 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 566 GvSV (PL_defgv) = slot->defsv;
305 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 567 GvAV (PL_defgv) = slot->defav;
306 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 568 GvSV (PL_errgv) = slot->errsv;
569 GvSV (irsgv) = slot->irsgv;
570 GvHV (PL_hintgv) = slot->hinthv;
571
572 #define VAR(name,type) PL_ ## name = slot->name;
573 # include "state.h"
574 #undef VAR
307 575
308 { 576 {
309 dSP; 577 dSP;
578
310 CV *cv; 579 CV *cv;
311 580
312 /* now do the ugly restore mess */ 581 /* now do the ugly restore mess */
313 while ((cv = (CV *)POPs)) 582 while (expect_true (cv = (CV *)POPs))
314 { 583 {
315 AV *padlist = (AV *)POPs;
316
317 if (padlist)
318 {
319 put_padlist (cv); /* mark this padlist as available */ 584 put_padlist (aTHX_ cv); /* mark this padlist as available */
320 CvPADLIST(cv) = padlist; 585 CvDEPTH (cv) = PTR2IV (POPs);
321 } 586 CvPADLIST (cv) = (AV *)POPs;
322
323 ++CvDEPTH(cv);
324 } 587 }
325 588
326 PUTBACK; 589 PUTBACK;
327 } 590 }
328}
329 591
592 slf_frame = c->slf_frame;
593 CORO_THROW = c->except;
594
595 if (expect_false (enable_times))
596 {
597 if (expect_false (!times_valid))
598 coro_times_update ();
599
600 coro_times_sub (c);
601 }
602
603 if (expect_false (c->on_enter))
604 {
605 int i;
606
607 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
608 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
609 }
610}
611
330static void 612static void
331save_state(Coro__State c, int flags) 613save_perl (pTHX_ Coro__State c)
332{ 614{
615 if (expect_false (c->on_leave))
616 {
617 int i;
618
619 for (i = AvFILLp (c->on_leave); i >= 0; --i)
620 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
621 }
622
623 times_valid = 0;
624
625 if (expect_false (enable_times))
626 {
627 coro_times_update (); times_valid = 1;
628 coro_times_add (c);
629 }
630
631 c->except = CORO_THROW;
632 c->slf_frame = slf_frame;
633
333 { 634 {
334 dSP; 635 dSP;
335 I32 cxix = cxstack_ix; 636 I32 cxix = cxstack_ix;
336 PERL_CONTEXT *ccstk = cxstack; 637 PERL_CONTEXT *ccstk = cxstack;
337 PERL_SI *top_si = PL_curstackinfo; 638 PERL_SI *top_si = PL_curstackinfo;
… …
339 /* 640 /*
340 * the worst thing you can imagine happens first - we have to save 641 * the worst thing you can imagine happens first - we have to save
341 * (and reinitialize) all cv's in the whole callchain :( 642 * (and reinitialize) all cv's in the whole callchain :(
342 */ 643 */
343 644
344 PUSHs (Nullsv); 645 XPUSHs (Nullsv);
345 /* this loop was inspired by pp_caller */ 646 /* this loop was inspired by pp_caller */
346 for (;;) 647 for (;;)
347 { 648 {
348 while (cxix >= 0) 649 while (expect_true (cxix >= 0))
349 { 650 {
350 PERL_CONTEXT *cx = &ccstk[cxix--]; 651 PERL_CONTEXT *cx = &ccstk[cxix--];
351 652
352 if (CxTYPE(cx) == CXt_SUB) 653 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
353 { 654 {
354 CV *cv = cx->blk_sub.cv; 655 CV *cv = cx->blk_sub.cv;
656
355 if (CvDEPTH(cv)) 657 if (expect_true (CvDEPTH (cv)))
356 { 658 {
357 EXTEND (SP, CvDEPTH(cv)*2); 659 EXTEND (SP, 3);
358
359 while (--CvDEPTH(cv))
360 {
361 /* this tells the restore code to increment CvDEPTH */
362 PUSHs (Nullsv);
363 PUSHs ((SV *)cv);
364 }
365
366 PUSHs ((SV *)CvPADLIST(cv)); 660 PUSHs ((SV *)CvPADLIST (cv));
661 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
367 PUSHs ((SV *)cv); 662 PUSHs ((SV *)cv);
368 663
664 CvDEPTH (cv) = 0;
369 get_padlist (cv); 665 get_padlist (aTHX_ cv);
370 } 666 }
371 } 667 }
372#ifdef CXt_FORMAT
373 else if (CxTYPE(cx) == CXt_FORMAT)
374 {
375 /* I never used formats, so how should I know how these are implemented? */
376 /* my bold guess is as a simple, plain sub... */
377 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
378 }
379#endif
380 } 668 }
381 669
382 if (top_si->si_type == PERLSI_MAIN) 670 if (expect_true (top_si->si_type == PERLSI_MAIN))
383 break; 671 break;
384 672
385 top_si = top_si->si_prev; 673 top_si = top_si->si_prev;
386 ccstk = top_si->si_cxstack; 674 ccstk = top_si->si_cxstack;
387 cxix = top_si->si_cxix; 675 cxix = top_si->si_cxix;
388 } 676 }
389 677
390 PUTBACK; 678 PUTBACK;
391 } 679 }
392 680
393 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 681 /* allocate some space on the context stack for our purposes */
394 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 682 /* we manually unroll here, as usually 2 slots is enough */
395 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 683 if (SLOT_COUNT >= 1) CXINC;
684 if (SLOT_COUNT >= 2) CXINC;
685 if (SLOT_COUNT >= 3) CXINC;
686 {
687 unsigned int i;
688 for (i = 3; i < SLOT_COUNT; ++i)
689 CXINC;
690 }
691 cxstack_ix -= SLOT_COUNT; /* undo allocation */
396 692
397 c->dowarn = PL_dowarn;
398 c->in_eval = PL_in_eval;
399
400 c->curstackinfo = PL_curstackinfo;
401 c->curstack = PL_curstack;
402 c->mainstack = PL_mainstack; 693 c->mainstack = PL_mainstack;
403 c->stack_sp = PL_stack_sp; 694
404 c->op = PL_op; 695 {
405 c->curpad = PL_curpad; 696 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
406 c->comppad = PL_comppad; 697
407 c->compcv = PL_compcv; 698 slot->defav = GvAV (PL_defgv);
408 c->stack_base = PL_stack_base; 699 slot->defsv = DEFSV;
409 c->stack_max = PL_stack_max; 700 slot->errsv = ERRSV;
410 c->tmps_stack = PL_tmps_stack; 701 slot->irsgv = GvSV (irsgv);
411 c->tmps_floor = PL_tmps_floor; 702 slot->hinthv = GvHV (PL_hintgv);
412 c->tmps_ix = PL_tmps_ix; 703
413 c->tmps_max = PL_tmps_max; 704 #define VAR(name,type) slot->name = PL_ ## name;
414 c->markstack = PL_markstack; 705 # include "state.h"
415 c->markstack_ptr = PL_markstack_ptr; 706 #undef VAR
416 c->markstack_max = PL_markstack_max; 707 }
417 c->scopestack = PL_scopestack;
418 c->scopestack_ix = PL_scopestack_ix;
419 c->scopestack_max = PL_scopestack_max;
420 c->savestack = PL_savestack;
421 c->savestack_ix = PL_savestack_ix;
422 c->savestack_max = PL_savestack_max;
423#if PERL_VERSION < 9
424 c->retstack = PL_retstack;
425 c->retstack_ix = PL_retstack_ix;
426 c->retstack_max = PL_retstack_max;
427#endif
428 c->curpm = PL_curpm;
429 c->curcop = PL_curcop;
430} 708}
431 709
432/* 710/*
433 * allocate various perl stacks. This is an exact copy 711 * allocate various perl stacks. This is almost an exact copy
434 * of perl.c:init_stacks, except that it uses less memory 712 * of perl.c:init_stacks, except that it uses less memory
435 * on the (sometimes correct) assumption that coroutines do 713 * on the (sometimes correct) assumption that coroutines do
436 * not usually need a lot of stackspace. 714 * not usually need a lot of stackspace.
437 */ 715 */
716#if CORO_PREFER_PERL_FUNCTIONS
717# define coro_init_stacks(thx) init_stacks ()
718#else
438static void 719static void
439coro_init_stacks () 720coro_init_stacks (pTHX)
440{ 721{
441 LOCK; 722 PL_curstackinfo = new_stackinfo(32, 8);
442
443 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
444 PL_curstackinfo->si_type = PERLSI_MAIN; 723 PL_curstackinfo->si_type = PERLSI_MAIN;
445 PL_curstack = PL_curstackinfo->si_stack; 724 PL_curstack = PL_curstackinfo->si_stack;
446 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 725 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
447 726
448 PL_stack_base = AvARRAY(PL_curstack); 727 PL_stack_base = AvARRAY(PL_curstack);
449 PL_stack_sp = PL_stack_base; 728 PL_stack_sp = PL_stack_base;
450 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 729 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
451 730
452 New(50,PL_tmps_stack,96,SV*); 731 New(50,PL_tmps_stack,32,SV*);
453 PL_tmps_floor = -1; 732 PL_tmps_floor = -1;
454 PL_tmps_ix = -1; 733 PL_tmps_ix = -1;
455 PL_tmps_max = 96; 734 PL_tmps_max = 32;
456 735
457 New(54,PL_markstack,16,I32); 736 New(54,PL_markstack,16,I32);
458 PL_markstack_ptr = PL_markstack; 737 PL_markstack_ptr = PL_markstack;
459 PL_markstack_max = PL_markstack + 16; 738 PL_markstack_max = PL_markstack + 16;
460 739
461#ifdef SET_MARK_OFFSET 740#ifdef SET_MARK_OFFSET
462 SET_MARK_OFFSET; 741 SET_MARK_OFFSET;
463#endif 742#endif
464 743
465 New(54,PL_scopestack,16,I32); 744 New(54,PL_scopestack,8,I32);
466 PL_scopestack_ix = 0; 745 PL_scopestack_ix = 0;
467 PL_scopestack_max = 16; 746 PL_scopestack_max = 8;
468 747
469 New(54,PL_savestack,96,ANY); 748 New(54,PL_savestack,24,ANY);
470 PL_savestack_ix = 0; 749 PL_savestack_ix = 0;
471 PL_savestack_max = 96; 750 PL_savestack_max = 24;
472 751
473#if PERL_VERSION < 9 752#if !PERL_VERSION_ATLEAST (5,10,0)
474 New(54,PL_retstack,8,OP*); 753 New(54,PL_retstack,4,OP*);
475 PL_retstack_ix = 0; 754 PL_retstack_ix = 0;
476 PL_retstack_max = 8; 755 PL_retstack_max = 4;
477#endif 756#endif
478
479 UNLOCK;
480} 757}
758#endif
481 759
482/* 760/*
483 * destroy the stacks, the callchain etc... 761 * destroy the stacks, the callchain etc...
484 */ 762 */
485static void 763static void
486destroy_stacks() 764coro_destruct_stacks (pTHX)
487{ 765{
488 if (!IN_DESTRUCT)
489 {
490 /* is this ugly, I ask? */
491 LEAVE_SCOPE (0);
492
493 /* sure it is, but more important: is it correct?? :/ */
494 FREETMPS;
495
496 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
497 }
498
499 while (PL_curstackinfo->si_next) 766 while (PL_curstackinfo->si_next)
500 PL_curstackinfo = PL_curstackinfo->si_next; 767 PL_curstackinfo = PL_curstackinfo->si_next;
501 768
502 while (PL_curstackinfo) 769 while (PL_curstackinfo)
503 { 770 {
504 PERL_SI *p = PL_curstackinfo->si_prev; 771 PERL_SI *p = PL_curstackinfo->si_prev;
505 772
506 { /*D*//*remove*/
507 dSP;
508 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
509 PUTBACK; /* possibly superfluous */
510 }
511
512 if (!IN_DESTRUCT) 773 if (!IN_DESTRUCT)
513 {
514 dounwind (-1);/*D*//*remove*/
515 SvREFCNT_dec (PL_curstackinfo->si_stack); 774 SvREFCNT_dec (PL_curstackinfo->si_stack);
516 }
517 775
518 Safefree (PL_curstackinfo->si_cxstack); 776 Safefree (PL_curstackinfo->si_cxstack);
519 Safefree (PL_curstackinfo); 777 Safefree (PL_curstackinfo);
520 PL_curstackinfo = p; 778 PL_curstackinfo = p;
521 } 779 }
522 780
523 Safefree (PL_tmps_stack); 781 Safefree (PL_tmps_stack);
524 Safefree (PL_markstack); 782 Safefree (PL_markstack);
525 Safefree (PL_scopestack); 783 Safefree (PL_scopestack);
526 Safefree (PL_savestack); 784 Safefree (PL_savestack);
527#if PERL_VERSION < 9 785#if !PERL_VERSION_ATLEAST (5,10,0)
528 Safefree (PL_retstack); 786 Safefree (PL_retstack);
529#endif 787#endif
530} 788}
531 789
790#define CORO_RSS \
791 rss += sizeof (SYM (curstackinfo)); \
792 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
793 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
794 rss += SYM (tmps_max) * sizeof (SV *); \
795 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
796 rss += SYM (scopestack_max) * sizeof (I32); \
797 rss += SYM (savestack_max) * sizeof (ANY);
798
799static size_t
800coro_rss (pTHX_ struct coro *coro)
801{
802 size_t rss = sizeof (*coro);
803
804 if (coro->mainstack)
805 {
806 if (coro->flags & CF_RUNNING)
807 {
808 #define SYM(sym) PL_ ## sym
809 CORO_RSS;
810 #undef SYM
811 }
812 else
813 {
814 #define SYM(sym) coro->slot->sym
815 CORO_RSS;
816 #undef SYM
817 }
818 }
819
820 return rss;
821}
822
823/** coroutine stack handling ************************************************/
824
825static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
826static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
827static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
828
829/* apparently < 5.8.8 */
830#ifndef MgPV_nolen_const
831#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
832 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
833 (const char*)(mg)->mg_ptr)
834#endif
835
836/*
837 * This overrides the default magic get method of %SIG elements.
838 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
839 * and instead of trying to save and restore the hash elements, we just provide
840 * readback here.
841 */
532static void 842static int
533setup_coro (struct coro *coro) 843coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
844{
845 const char *s = MgPV_nolen_const (mg);
846
847 if (*s == '_')
848 {
849 SV **svp = 0;
850
851 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
852 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
853
854 if (svp)
855 {
856 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
857 return 0;
858 }
859 }
860
861 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
862}
863
864static int
865coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
866{
867 const char *s = MgPV_nolen_const (mg);
868
869 if (*s == '_')
870 {
871 SV **svp = 0;
872
873 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
874 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
875
876 if (svp)
877 {
878 SV *old = *svp;
879 *svp = 0;
880 SvREFCNT_dec (old);
881 return 0;
882 }
883 }
884
885 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
886}
887
888static int
889coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
890{
891 const char *s = MgPV_nolen_const (mg);
892
893 if (*s == '_')
894 {
895 SV **svp = 0;
896
897 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
898 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
899
900 if (svp)
901 {
902 SV *old = *svp;
903 *svp = SvOK (sv) ? newSVsv (sv) : 0;
904 SvREFCNT_dec (old);
905 return 0;
906 }
907 }
908
909 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
910}
911
912static void
913prepare_nop (pTHX_ struct coro_transfer_args *ta)
914{
915 /* kind of mega-hacky, but works */
916 ta->next = ta->prev = (struct coro *)ta;
917}
918
919static int
920slf_check_nop (pTHX_ struct CoroSLF *frame)
921{
922 return 0;
923}
924
925static int
926slf_check_repeat (pTHX_ struct CoroSLF *frame)
927{
928 return 1;
929}
930
931static UNOP coro_setup_op;
932
933static void NOINLINE /* noinline to keep it out of the transfer fast path */
934coro_setup (pTHX_ struct coro *coro)
534{ 935{
535 /* 936 /*
536 * emulate part of the perl startup here. 937 * emulate part of the perl startup here.
537 */ 938 */
939 coro_init_stacks (aTHX);
940
941 PL_runops = RUNOPS_DEFAULT;
942 PL_curcop = &PL_compiling;
943 PL_in_eval = EVAL_NULL;
944 PL_comppad = 0;
945 PL_comppad_name = 0;
946 PL_comppad_name_fill = 0;
947 PL_comppad_name_floor = 0;
948 PL_curpm = 0;
949 PL_curpad = 0;
950 PL_localizing = 0;
951 PL_dirty = 0;
952 PL_restartop = 0;
953#if PERL_VERSION_ATLEAST (5,10,0)
954 PL_parser = 0;
955#endif
956 PL_hints = 0;
957
958 /* recreate the die/warn hooks */
959 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
960 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
961
962 GvSV (PL_defgv) = newSV (0);
963 GvAV (PL_defgv) = coro->args; coro->args = 0;
964 GvSV (PL_errgv) = newSV (0);
965 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
966 GvHV (PL_hintgv) = 0;
967 PL_rs = newSVsv (GvSV (irsgv));
968 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
969
970 {
971 dSP;
972 UNOP myop;
973
974 Zero (&myop, 1, UNOP);
975 myop.op_next = Nullop;
976 myop.op_type = OP_ENTERSUB;
977 myop.op_flags = OPf_WANT_VOID;
978
979 PUSHMARK (SP);
980 PUSHs ((SV *)coro->startcv);
981 PUTBACK;
982 PL_op = (OP *)&myop;
983 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
984 }
985
986 /* this newly created coroutine might be run on an existing cctx which most
987 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
988 */
989 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
990 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
991
992 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
993 coro_setup_op.op_next = PL_op;
994 coro_setup_op.op_type = OP_ENTERSUB;
995 coro_setup_op.op_ppaddr = pp_slf;
996 /* no flags etc. required, as an init function won't be called */
997
998 PL_op = (OP *)&coro_setup_op;
999
1000 /* copy throw, in case it was set before coro_setup */
1001 CORO_THROW = coro->except;
1002
1003 if (expect_false (enable_times))
1004 {
1005 coro_times_update ();
1006 coro_times_sub (coro);
1007 }
1008}
1009
1010static void
1011coro_unwind_stacks (pTHX)
1012{
1013 if (!IN_DESTRUCT)
1014 {
1015 /* restore all saved variables and stuff */
1016 LEAVE_SCOPE (0);
1017 assert (PL_tmps_floor == -1);
1018
1019 /* free all temporaries */
1020 FREETMPS;
1021 assert (PL_tmps_ix == -1);
1022
1023 /* unwind all extra stacks */
1024 POPSTACK_TO (PL_mainstack);
1025
1026 /* unwind main stack */
1027 dounwind (-1);
1028 }
1029}
1030
1031static void
1032coro_destruct_perl (pTHX_ struct coro *coro)
1033{
1034 SV *svf [9];
1035
1036 {
1037 struct coro *current = SvSTATE_current;
1038
1039 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1040
1041 save_perl (aTHX_ current);
1042 load_perl (aTHX_ coro);
1043
1044 coro_unwind_stacks (aTHX);
1045 coro_destruct_stacks (aTHX);
1046
1047 // now save some sv's to be free'd later
1048 svf [0] = GvSV (PL_defgv);
1049 svf [1] = (SV *)GvAV (PL_defgv);
1050 svf [2] = GvSV (PL_errgv);
1051 svf [3] = (SV *)PL_defoutgv;
1052 svf [4] = PL_rs;
1053 svf [5] = GvSV (irsgv);
1054 svf [6] = (SV *)GvHV (PL_hintgv);
1055 svf [7] = PL_diehook;
1056 svf [8] = PL_warnhook;
1057 assert (9 == sizeof (svf) / sizeof (*svf));
1058
1059 load_perl (aTHX_ current);
1060 }
1061
1062 {
1063 unsigned int i;
1064
1065 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1066 SvREFCNT_dec (svf [i]);
1067
1068 SvREFCNT_dec (coro->saved_deffh);
1069 SvREFCNT_dec (coro->rouse_cb);
1070 SvREFCNT_dec (coro->invoke_cb);
1071 SvREFCNT_dec (coro->invoke_av);
1072 }
1073}
1074
1075INLINE void
1076free_coro_mortal (pTHX)
1077{
1078 if (expect_true (coro_mortal))
1079 {
1080 SvREFCNT_dec (coro_mortal);
1081 coro_mortal = 0;
1082 }
1083}
1084
1085static int
1086runops_trace (pTHX)
1087{
1088 COP *oldcop = 0;
1089 int oldcxix = -2;
1090
1091 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1092 {
1093 PERL_ASYNC_CHECK ();
1094
1095 if (cctx_current->flags & CC_TRACE_ALL)
1096 {
1097 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1098 {
1099 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1100 SV **bot, **top;
1101 AV *av = newAV (); /* return values */
1102 SV **cb;
1103 dSP;
1104
1105 GV *gv = CvGV (cx->blk_sub.cv);
1106 SV *fullname = sv_2mortal (newSV (0));
1107 if (isGV (gv))
1108 gv_efullname3 (fullname, gv, 0);
1109
1110 bot = PL_stack_base + cx->blk_oldsp + 1;
1111 top = cx->blk_gimme == G_ARRAY ? SP + 1
1112 : cx->blk_gimme == G_SCALAR ? bot + 1
1113 : bot;
1114
1115 av_extend (av, top - bot);
1116 while (bot < top)
1117 av_push (av, SvREFCNT_inc_NN (*bot++));
1118
1119 PL_runops = RUNOPS_DEFAULT;
1120 ENTER;
1121 SAVETMPS;
1122 EXTEND (SP, 3);
1123 PUSHMARK (SP);
1124 PUSHs (&PL_sv_no);
1125 PUSHs (fullname);
1126 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1127 PUTBACK;
1128 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1129 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1130 SPAGAIN;
1131 FREETMPS;
1132 LEAVE;
1133 PL_runops = runops_trace;
1134 }
1135
1136 if (oldcop != PL_curcop)
1137 {
1138 oldcop = PL_curcop;
1139
1140 if (PL_curcop != &PL_compiling)
1141 {
1142 SV **cb;
1143
1144 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1145 {
1146 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1147
1148 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1149 {
1150 dSP;
1151 GV *gv = CvGV (cx->blk_sub.cv);
1152 SV *fullname = sv_2mortal (newSV (0));
1153
1154 if (isGV (gv))
1155 gv_efullname3 (fullname, gv, 0);
1156
1157 PL_runops = RUNOPS_DEFAULT;
1158 ENTER;
1159 SAVETMPS;
1160 EXTEND (SP, 3);
1161 PUSHMARK (SP);
1162 PUSHs (&PL_sv_yes);
1163 PUSHs (fullname);
1164 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1165 PUTBACK;
1166 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1167 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1168 SPAGAIN;
1169 FREETMPS;
1170 LEAVE;
1171 PL_runops = runops_trace;
1172 }
1173
1174 oldcxix = cxstack_ix;
1175 }
1176
1177 if (cctx_current->flags & CC_TRACE_LINE)
1178 {
1179 dSP;
1180
1181 PL_runops = RUNOPS_DEFAULT;
1182 ENTER;
1183 SAVETMPS;
1184 EXTEND (SP, 3);
1185 PL_runops = RUNOPS_DEFAULT;
1186 PUSHMARK (SP);
1187 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1188 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1189 PUTBACK;
1190 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1191 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1192 SPAGAIN;
1193 FREETMPS;
1194 LEAVE;
1195 PL_runops = runops_trace;
1196 }
1197 }
1198 }
1199 }
1200 }
1201
1202 TAINT_NOT;
1203 return 0;
1204}
1205
1206static struct CoroSLF cctx_ssl_frame;
1207
1208static void
1209slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1210{
1211 ta->prev = 0;
1212}
1213
1214static int
1215slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1216{
1217 *frame = cctx_ssl_frame;
1218
1219 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1220}
1221
1222/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1223static void NOINLINE
1224cctx_prepare (pTHX)
1225{
1226 PL_top_env = &PL_start_env;
1227
1228 if (cctx_current->flags & CC_TRACE)
1229 PL_runops = runops_trace;
1230
1231 /* we already must be executing an SLF op, there is no other valid way
1232 * that can lead to creation of a new cctx */
1233 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1234 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1235
1236 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1237 cctx_ssl_frame = slf_frame;
1238
1239 slf_frame.prepare = slf_prepare_set_stacklevel;
1240 slf_frame.check = slf_check_set_stacklevel;
1241}
1242
1243/* the tail of transfer: execute stuff we can only do after a transfer */
1244INLINE void
1245transfer_tail (pTHX)
1246{
1247 free_coro_mortal (aTHX);
1248}
1249
1250/*
1251 * this is a _very_ stripped down perl interpreter ;)
1252 */
1253static void
1254cctx_run (void *arg)
1255{
1256#ifdef USE_ITHREADS
1257# if CORO_PTHREAD
1258 PERL_SET_CONTEXT (coro_thx);
1259# endif
1260#endif
1261 {
1262 dTHX;
1263
1264 /* normally we would need to skip the entersub here */
1265 /* not doing so will re-execute it, which is exactly what we want */
1266 /* PL_nop = PL_nop->op_next */
1267
1268 /* inject a fake subroutine call to cctx_init */
1269 cctx_prepare (aTHX);
1270
1271 /* cctx_run is the alternative tail of transfer() */
1272 transfer_tail (aTHX);
1273
1274 /* somebody or something will hit me for both perl_run and PL_restartop */
1275 PL_restartop = PL_op;
1276 perl_run (PL_curinterp);
1277 /*
1278 * Unfortunately, there is no way to get at the return values of the
1279 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1280 * runtime errors here, as this is just a random interpreter, not a thread.
1281 */
1282
1283 /*
1284 * If perl-run returns we assume exit() was being called or the coro
1285 * fell off the end, which seems to be the only valid (non-bug)
1286 * reason for perl_run to return. We try to exit by jumping to the
1287 * bootstrap-time "top" top_env, as we cannot restore the "main"
1288 * coroutine as Coro has no such concept.
1289 * This actually isn't valid with the pthread backend, but OSes requiring
1290 * that backend are too broken to do it in a standards-compliant way.
1291 */
1292 PL_top_env = main_top_env;
1293 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1294 }
1295}
1296
1297static coro_cctx *
1298cctx_new ()
1299{
1300 coro_cctx *cctx;
1301
1302 ++cctx_count;
1303 New (0, cctx, 1, coro_cctx);
1304
1305 cctx->gen = cctx_gen;
1306 cctx->flags = 0;
1307 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1308
1309 return cctx;
1310}
1311
1312/* create a new cctx only suitable as source */
1313static coro_cctx *
1314cctx_new_empty ()
1315{
1316 coro_cctx *cctx = cctx_new ();
1317
1318 cctx->sptr = 0;
1319 coro_create (&cctx->cctx, 0, 0, 0, 0);
1320
1321 return cctx;
1322}
1323
1324/* create a new cctx suitable as destination/running a perl interpreter */
1325static coro_cctx *
1326cctx_new_run ()
1327{
1328 coro_cctx *cctx = cctx_new ();
1329 void *stack_start;
1330 size_t stack_size;
1331
1332#if HAVE_MMAP
1333 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1334 /* mmap supposedly does allocate-on-write for us */
1335 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1336
1337 if (cctx->sptr != (void *)-1)
1338 {
1339 #if CORO_STACKGUARD
1340 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1341 #endif
1342 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1343 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1344 cctx->flags |= CC_MAPPED;
1345 }
1346 else
1347#endif
1348 {
1349 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1350 New (0, cctx->sptr, cctx_stacksize, long);
1351
1352 if (!cctx->sptr)
1353 {
1354 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1355 _exit (EXIT_FAILURE);
1356 }
1357
1358 stack_start = cctx->sptr;
1359 stack_size = cctx->ssize;
1360 }
1361
1362 #if CORO_USE_VALGRIND
1363 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1364 #endif
1365
1366 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1367
1368 return cctx;
1369}
1370
1371static void
1372cctx_destroy (coro_cctx *cctx)
1373{
1374 if (!cctx)
1375 return;
1376
1377 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1378
1379 --cctx_count;
1380 coro_destroy (&cctx->cctx);
1381
1382 /* coro_transfer creates new, empty cctx's */
1383 if (cctx->sptr)
1384 {
1385 #if CORO_USE_VALGRIND
1386 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1387 #endif
1388
1389#if HAVE_MMAP
1390 if (cctx->flags & CC_MAPPED)
1391 munmap (cctx->sptr, cctx->ssize);
1392 else
1393#endif
1394 Safefree (cctx->sptr);
1395 }
1396
1397 Safefree (cctx);
1398}
1399
1400/* wether this cctx should be destructed */
1401#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1402
1403static coro_cctx *
1404cctx_get (pTHX)
1405{
1406 while (expect_true (cctx_first))
1407 {
1408 coro_cctx *cctx = cctx_first;
1409 cctx_first = cctx->next;
1410 --cctx_idle;
1411
1412 if (expect_true (!CCTX_EXPIRED (cctx)))
1413 return cctx;
1414
1415 cctx_destroy (cctx);
1416 }
1417
1418 return cctx_new_run ();
1419}
1420
1421static void
1422cctx_put (coro_cctx *cctx)
1423{
1424 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1425
1426 /* free another cctx if overlimit */
1427 if (expect_false (cctx_idle >= cctx_max_idle))
1428 {
1429 coro_cctx *first = cctx_first;
1430 cctx_first = first->next;
1431 --cctx_idle;
1432
1433 cctx_destroy (first);
1434 }
1435
1436 ++cctx_idle;
1437 cctx->next = cctx_first;
1438 cctx_first = cctx;
1439}
1440
1441/** coroutine switching *****************************************************/
1442
1443static void
1444transfer_check (pTHX_ struct coro *prev, struct coro *next)
1445{
1446 /* TODO: throwing up here is considered harmful */
1447
1448 if (expect_true (prev != next))
1449 {
1450 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1451 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1452
1453 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1454 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1455
1456#if !PERL_VERSION_ATLEAST (5,10,0)
1457 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1458 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1459#endif
1460 }
1461}
1462
1463/* always use the TRANSFER macro */
1464static void NOINLINE /* noinline so we have a fixed stackframe */
1465transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1466{
1467 dSTACKLEVEL;
1468
1469 /* sometimes transfer is only called to set idle_sp */
1470 if (expect_false (!prev))
1471 {
1472 cctx_current->idle_sp = STACKLEVEL;
1473 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1474 }
1475 else if (expect_true (prev != next))
1476 {
1477 coro_cctx *cctx_prev;
1478
1479 if (expect_false (prev->flags & CF_NEW))
1480 {
1481 /* create a new empty/source context */
1482 prev->flags &= ~CF_NEW;
1483 prev->flags |= CF_RUNNING;
1484 }
1485
1486 prev->flags &= ~CF_RUNNING;
1487 next->flags |= CF_RUNNING;
1488
1489 /* first get rid of the old state */
1490 save_perl (aTHX_ prev);
1491
1492 if (expect_false (next->flags & CF_NEW))
1493 {
1494 /* need to start coroutine */
1495 next->flags &= ~CF_NEW;
1496 /* setup coroutine call */
1497 coro_setup (aTHX_ next);
1498 }
1499 else
1500 load_perl (aTHX_ next);
1501
1502 /* possibly untie and reuse the cctx */
1503 if (expect_true (
1504 cctx_current->idle_sp == STACKLEVEL
1505 && !(cctx_current->flags & CC_TRACE)
1506 && !force_cctx
1507 ))
1508 {
1509 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1510 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1511
1512 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1513 /* without this the next cctx_get might destroy the running cctx while still in use */
1514 if (expect_false (CCTX_EXPIRED (cctx_current)))
1515 if (expect_true (!next->cctx))
1516 next->cctx = cctx_get (aTHX);
1517
1518 cctx_put (cctx_current);
1519 }
1520 else
1521 prev->cctx = cctx_current;
1522
1523 ++next->usecount;
1524
1525 cctx_prev = cctx_current;
1526 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1527
1528 next->cctx = 0;
1529
1530 if (expect_false (cctx_prev != cctx_current))
1531 {
1532 cctx_prev->top_env = PL_top_env;
1533 PL_top_env = cctx_current->top_env;
1534 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1535 }
1536
1537 transfer_tail (aTHX);
1538 }
1539}
1540
1541#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1542#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1543
1544/** high level stuff ********************************************************/
1545
1546static int
1547coro_state_destroy (pTHX_ struct coro *coro)
1548{
1549 if (coro->flags & CF_DESTROYED)
1550 return 0;
1551
1552 if (coro->on_destroy && !PL_dirty)
1553 coro->on_destroy (aTHX_ coro);
1554
1555 coro->flags |= CF_DESTROYED;
1556
1557 if (coro->flags & CF_READY)
1558 {
1559 /* reduce nready, as destroying a ready coro effectively unreadies it */
1560 /* alternative: look through all ready queues and remove the coro */
1561 --coro_nready;
1562 }
1563 else
1564 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1565
1566 if (coro->mainstack
1567 && coro->mainstack != main_mainstack
1568 && coro->slot
1569 && !PL_dirty)
1570 coro_destruct_perl (aTHX_ coro);
1571
1572 cctx_destroy (coro->cctx);
1573 SvREFCNT_dec (coro->startcv);
1574 SvREFCNT_dec (coro->args);
1575 SvREFCNT_dec (CORO_THROW);
1576
1577 if (coro->next) coro->next->prev = coro->prev;
1578 if (coro->prev) coro->prev->next = coro->next;
1579 if (coro == coro_first) coro_first = coro->next;
1580
1581 return 1;
1582}
1583
1584static int
1585coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1586{
1587 struct coro *coro = (struct coro *)mg->mg_ptr;
1588 mg->mg_ptr = 0;
1589
1590 coro->hv = 0;
1591
1592 if (--coro->refcnt < 0)
1593 {
1594 coro_state_destroy (aTHX_ coro);
1595 Safefree (coro);
1596 }
1597
1598 return 0;
1599}
1600
1601static int
1602coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1603{
1604 struct coro *coro = (struct coro *)mg->mg_ptr;
1605
1606 ++coro->refcnt;
1607
1608 return 0;
1609}
1610
1611static MGVTBL coro_state_vtbl = {
1612 0, 0, 0, 0,
1613 coro_state_free,
1614 0,
1615#ifdef MGf_DUP
1616 coro_state_dup,
1617#else
1618# define MGf_DUP 0
1619#endif
1620};
1621
1622static void
1623prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1624{
1625 ta->prev = SvSTATE (prev_sv);
1626 ta->next = SvSTATE (next_sv);
1627 TRANSFER_CHECK (*ta);
1628}
1629
1630static void
1631api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1632{
1633 struct coro_transfer_args ta;
1634
1635 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1636 TRANSFER (ta, 1);
1637}
1638
1639/** Coro ********************************************************************/
1640
1641INLINE void
1642coro_enq (pTHX_ struct coro *coro)
1643{
1644 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1645
1646 SvREFCNT_inc_NN (coro->hv);
1647
1648 coro->next_ready = 0;
1649 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1650 ready [1] = coro;
1651}
1652
1653INLINE struct coro *
1654coro_deq (pTHX)
1655{
1656 int prio;
1657
1658 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1659 {
1660 struct coro **ready = coro_ready [prio];
1661
1662 if (ready [0])
1663 {
1664 struct coro *coro = ready [0];
1665 ready [0] = coro->next_ready;
1666 return coro;
1667 }
1668 }
1669
1670 return 0;
1671}
1672
1673static void
1674invoke_sv_ready_hook_helper (void)
1675{
538 dTHX; 1676 dTHX;
539 dSP; 1677 dSP;
540 UNOP myop;
541 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
542 1678
543 coro_init_stacks (); 1679 ENTER;
544 /*PL_curcop = 0;*/ 1680 SAVETMPS;
545 /*PL_in_eval = PL_in_eval;*/ /* inherit */
546 SvREFCNT_dec (GvAV (PL_defgv));
547 GvAV (PL_defgv) = coro->args; coro->args = 0;
548 1681
549 SPAGAIN;
550
551 Zero (&myop, 1, UNOP);
552 myop.op_next = Nullop;
553 myop.op_flags = OPf_WANT_VOID;
554
555 PL_op = (OP *)&myop;
556
557 PUSHMARK(SP); 1682 PUSHMARK (SP);
558 XPUSHs (sub_init);
559 PUTBACK; 1683 PUTBACK;
560 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1684 call_sv (coro_readyhook, G_VOID | G_DISCARD);
561 SPAGAIN;
562 1685
563 ENTER; /* necessary e.g. for dounwind */ 1686 FREETMPS;
1687 LEAVE;
564} 1688}
565 1689
566static void 1690static int
567free_coro_mortal () 1691api_ready (pTHX_ SV *coro_sv)
568{ 1692{
569 if (coro_mortal) 1693 struct coro *coro = SvSTATE (coro_sv);
570 {
571 SvREFCNT_dec (coro_mortal);
572 coro_mortal = 0;
573 }
574}
575 1694
576static void 1695 if (coro->flags & CF_READY)
577coro_run (void *arg)
578{
579 /*
580 * this is a _very_ stripped down perl interpreter ;)
581 */
582 dTHX;
583 int ret;
584
585 UNLOCK;
586
587 PL_top_env = &PL_start_env;
588
589 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
590 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
591
592 /* continue at cctx_init, without entersub */
593 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
594
595 /* somebody will hit me for both perl_run and PL_restartop */
596 ret = perl_run (PERL_GET_CONTEXT);
597 printf ("ret %d\n", ret);//D
598
599 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
600 abort ();
601}
602
603static coro_stack *
604stack_new ()
605{
606 coro_stack *stack;
607
608 New (0, stack, 1, coro_stack);
609
610#if HAVE_MMAP
611
612 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
613 /* mmap suppsedly does allocate-on-write for us */
614 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
615
616 if (stack->sptr == (void *)-1)
617 {
618 perror ("FATAL: unable to mmap stack for coroutine");
619 _exit (EXIT_FAILURE);
620 }
621
622# if STACKGUARD
623 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
624# endif
625
626#else
627
628 stack->ssize = STACKSIZE * (long)sizeof (long);
629 New (0, stack->sptr, STACKSIZE, long);
630
631 if (!stack->sptr)
632 {
633 perror (stderr, "FATAL: unable to malloc stack for coroutine");
634 _exit (EXIT_FAILURE);
635 }
636
637#endif
638
639 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
640
641 return stack;
642}
643
644static void
645stack_free (coro_stack *stack)
646{
647 if (!stack)
648 return; 1696 return 0;
649 1697
650#if HAVE_MMAP 1698 coro->flags |= CF_READY;
651 munmap (stack->sptr, stack->ssize);
652#else
653 Safefree (stack->sptr);
654#endif
655 1699
656 Safefree (stack); 1700 coro_enq (aTHX_ coro);
657}
658 1701
659static coro_stack *stack_first; 1702 if (!coro_nready++)
1703 if (coroapi.readyhook)
1704 coroapi.readyhook ();
660 1705
661static coro_stack * 1706 return 1;
662stack_get () 1707}
663{
664 coro_stack *stack;
665 1708
666 if (stack_first) 1709static int
667 { 1710api_is_ready (pTHX_ SV *coro_sv)
668 stack = stack_first; 1711{
669 stack_first = stack->next; 1712 return !!(SvSTATE (coro_sv)->flags & CF_READY);
670 } 1713}
671 else 1714
1715/* expects to own a reference to next->hv */
1716INLINE void
1717prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1718{
1719 SV *prev_sv = SvRV (coro_current);
1720
1721 ta->prev = SvSTATE_hv (prev_sv);
1722 ta->next = next;
1723
1724 TRANSFER_CHECK (*ta);
1725
1726 SvRV_set (coro_current, (SV *)next->hv);
1727
1728 free_coro_mortal (aTHX);
1729 coro_mortal = prev_sv;
1730}
1731
1732static void
1733prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1734{
1735 for (;;)
672 { 1736 {
673 stack = stack_new (); 1737 struct coro *next = coro_deq (aTHX);
674 PL_op = PL_op->op_next;
675 }
676 1738
677 return stack; 1739 if (expect_true (next))
678}
679
680static void
681stack_put (coro_stack *stack)
682{
683 stack->next = stack_first;
684 stack_first = stack;
685}
686
687/* never call directly, always through the coro_state_transfer global variable */
688static void
689transfer_impl (struct coro *prev, struct coro *next, int flags)
690{
691 dSTACKLEVEL;
692
693 /* sometimes transfer is only called to set idle_sp */
694 if (flags == TRANSFER_SET_STACKLEVEL)
695 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
696 else if (prev != next)
697 {
698 coro_stack *prev__stack;
699
700 LOCK;
701
702 if (next->mainstack)
703 { 1740 {
704 /* coroutine already started */ 1741 /* cannot transfer to destroyed coros, skip and look for next */
705 SAVE (prev, flags); 1742 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
706 LOAD (next); 1743 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1744 else
1745 {
1746 next->flags &= ~CF_READY;
1747 --coro_nready;
1748
1749 prepare_schedule_to (aTHX_ ta, next);
1750 break;
1751 }
707 } 1752 }
708 else 1753 else
709 { 1754 {
710 /* need to start coroutine */ 1755 /* nothing to schedule: call the idle handler */
711 /* first get rid of the old state */ 1756 if (SvROK (sv_idle)
712 SAVE (prev, -1); 1757 && SvOBJECT (SvRV (sv_idle)))
713 /* setup coroutine call */ 1758 {
714 setup_coro (next); 1759 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
715 /* need a stack */ 1760 api_ready (aTHX_ SvRV (sv_idle));
716 next->stack = 0; 1761 --coro_nready;
1762 }
1763 else
1764 {
1765 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1766 dSP;
1767
1768 ENTER;
1769 SAVETMPS;
1770
1771 PUSHMARK (SP);
1772 PUTBACK;
1773 call_sv (sv_idle, G_VOID | G_DISCARD);
1774
1775 FREETMPS;
1776 LEAVE;
1777 }
717 } 1778 }
1779 }
1780}
718 1781
719 if (!prev->stack) 1782INLINE void
720 /* create a new empty context */ 1783prepare_cede (pTHX_ struct coro_transfer_args *ta)
721 Newz (0, prev->stack, 1, coro_stack); 1784{
1785 api_ready (aTHX_ coro_current);
1786 prepare_schedule (aTHX_ ta);
1787}
722 1788
723 prev__stack = prev->stack; 1789INLINE void
1790prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1791{
1792 SV *prev = SvRV (coro_current);
724 1793
725 /* possibly "free" the stack */ 1794 if (coro_nready)
726 if (prev__stack->idle_sp == STACKLEVEL) 1795 {
1796 prepare_schedule (aTHX_ ta);
1797 api_ready (aTHX_ prev);
1798 }
1799 else
1800 prepare_nop (aTHX_ ta);
1801}
1802
1803static void
1804api_schedule (pTHX)
1805{
1806 struct coro_transfer_args ta;
1807
1808 prepare_schedule (aTHX_ &ta);
1809 TRANSFER (ta, 1);
1810}
1811
1812static void
1813api_schedule_to (pTHX_ SV *coro_sv)
1814{
1815 struct coro_transfer_args ta;
1816 struct coro *next = SvSTATE (coro_sv);
1817
1818 SvREFCNT_inc_NN (coro_sv);
1819 prepare_schedule_to (aTHX_ &ta, next);
1820}
1821
1822static int
1823api_cede (pTHX)
1824{
1825 struct coro_transfer_args ta;
1826
1827 prepare_cede (aTHX_ &ta);
1828
1829 if (expect_true (ta.prev != ta.next))
1830 {
1831 TRANSFER (ta, 1);
1832 return 1;
1833 }
1834 else
1835 return 0;
1836}
1837
1838static int
1839api_cede_notself (pTHX)
1840{
1841 if (coro_nready)
1842 {
1843 struct coro_transfer_args ta;
1844
1845 prepare_cede_notself (aTHX_ &ta);
1846 TRANSFER (ta, 1);
1847 return 1;
1848 }
1849 else
1850 return 0;
1851}
1852
1853static void
1854api_trace (pTHX_ SV *coro_sv, int flags)
1855{
1856 struct coro *coro = SvSTATE (coro_sv);
1857
1858 if (coro->flags & CF_RUNNING)
1859 croak ("cannot enable tracing on a running coroutine, caught");
1860
1861 if (flags & CC_TRACE)
1862 {
1863 if (!coro->cctx)
1864 coro->cctx = cctx_new_run ();
1865 else if (!(coro->cctx->flags & CC_TRACE))
1866 croak ("cannot enable tracing on coroutine with custom stack, caught");
1867
1868 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1869 }
1870 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1871 {
1872 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1873
1874 if (coro->flags & CF_RUNNING)
1875 PL_runops = RUNOPS_DEFAULT;
1876 else
1877 coro->slot->runops = RUNOPS_DEFAULT;
1878 }
1879}
1880
1881static void
1882coro_call_on_destroy (pTHX_ struct coro *coro)
1883{
1884 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1885 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1886
1887 if (on_destroyp)
1888 {
1889 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1890
1891 while (AvFILLp (on_destroy) >= 0)
727 { 1892 {
728 stack_put (prev__stack); 1893 dSP; /* don't disturb outer sp */
729 prev->stack = 0; 1894 SV *cb = av_pop (on_destroy);
1895
1896 PUSHMARK (SP);
1897
1898 if (statusp)
1899 {
1900 int i;
1901 AV *status = (AV *)SvRV (*statusp);
1902 EXTEND (SP, AvFILLp (status) + 1);
1903
1904 for (i = 0; i <= AvFILLp (status); ++i)
1905 PUSHs (AvARRAY (status)[i]);
1906 }
1907
1908 PUTBACK;
1909 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
730 } 1910 }
731
732 if (!next->stack)
733 next->stack = stack_get ();
734
735 if (prev__stack != next->stack)
736 {
737 prev__stack->top_env = PL_top_env;
738 PL_top_env = next->stack->top_env;
739 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
740 }
741
742 free_coro_mortal ();
743
744 UNLOCK;
745 }
746}
747
748/* use this function pointer to call the above function */
749/* this is done to increase chances of the compiler not inlining the call */
750/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
751void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
752
753struct transfer_args
754{
755 struct coro *prev, *next;
756 int flags;
757};
758
759#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
760
761static void
762coro_state_destroy (struct coro *coro)
763{
764 if (coro->refcnt--)
765 return;
766
767 if (coro->mainstack && coro->mainstack != main_mainstack)
768 { 1911 }
769 struct coro temp; 1912}
770 1913
771 SAVE ((&temp), TRANSFER_SAVE_ALL); 1914static void
772 LOAD (coro); 1915slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1916{
1917 int i;
1918 HV *hv = (HV *)SvRV (coro_current);
1919 AV *av = newAV ();
773 1920
774 destroy_stacks (); 1921 /* items are actually not so common, so optimise for this case */
775 1922 if (items)
776 LOAD ((&temp)); /* this will get rid of defsv etc.. */
777
778 coro->mainstack = 0;
779 } 1923 {
1924 av_extend (av, items - 1);
780 1925
781 stack_free (coro->stack); 1926 for (i = 0; i < items; ++i)
782 SvREFCNT_dec (coro->args); 1927 av_push (av, SvREFCNT_inc_NN (arg [i]));
783 Safefree (coro); 1928 }
1929
1930 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1931
1932 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1933 api_ready (aTHX_ sv_manager);
1934
1935 frame->prepare = prepare_schedule;
1936 frame->check = slf_check_repeat;
1937
1938 /* as a minor optimisation, we could unwind all stacks here */
1939 /* but that puts extra pressure on pp_slf, and is not worth much */
1940 /*coro_unwind_stacks (aTHX);*/
784} 1941}
1942
1943/*****************************************************************************/
1944/* async pool handler */
785 1945
786static int 1946static int
787coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1947slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
788{ 1948{
1949 HV *hv = (HV *)SvRV (coro_current);
789 struct coro *coro = (struct coro *)mg->mg_ptr; 1950 struct coro *coro = (struct coro *)frame->data;
790 mg->mg_ptr = 0;
791 1951
792 coro_state_destroy (coro); 1952 if (!coro->invoke_cb)
793 1953 return 1; /* loop till we have invoke */
794 return 0; 1954 else
795}
796
797static int
798coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
799{
800 struct coro *coro = (struct coro *)mg->mg_ptr;
801
802 ++coro->refcnt;
803
804 return 0;
805}
806
807static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
808
809static struct coro *
810SvSTATE (SV *coro)
811{
812 HV *stash;
813 MAGIC *mg;
814
815 if (SvROK (coro))
816 coro = SvRV (coro);
817
818 stash = SvSTASH (coro);
819 if (stash != coro_stash && stash != coro_state_stash)
820 {
821 /* very slow, but rare, check */
822 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
823 croak ("Coro::State object required");
824 }
825
826 mg = SvMAGIC (coro);
827 assert (mg->mg_type == PERL_MAGIC_ext);
828 return (struct coro *)mg->mg_ptr;
829}
830
831static void
832prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
833{
834 ta->prev = SvSTATE (prev);
835 ta->next = SvSTATE (next);
836 ta->flags = flags;
837}
838
839static void
840api_transfer (SV *prev, SV *next, int flags)
841{
842 dTHX;
843 struct transfer_args ta;
844
845 prepare_transfer (&ta, prev, next, flags);
846 TRANSFER (ta);
847}
848
849/** Coro ********************************************************************/
850
851#define PRIO_MAX 3
852#define PRIO_HIGH 1
853#define PRIO_NORMAL 0
854#define PRIO_LOW -1
855#define PRIO_IDLE -3
856#define PRIO_MIN -4
857
858/* for Coro.pm */
859static GV *coro_current, *coro_idle;
860static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
861static int coro_nready;
862
863static void
864coro_enq (SV *sv)
865{
866 int prio;
867
868 if (SvTYPE (sv) != SVt_PVHV)
869 croak ("Coro::ready tried to enqueue something that is not a coroutine");
870
871 prio = SvSTATE (sv)->prio;
872
873 av_push (coro_ready [prio - PRIO_MIN], sv);
874 coro_nready++;
875}
876
877static SV *
878coro_deq (int min_prio)
879{
880 int prio = PRIO_MAX - PRIO_MIN;
881
882 min_prio -= PRIO_MIN;
883 if (min_prio < 0)
884 min_prio = 0;
885
886 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
887 if (AvFILLp (coro_ready [prio]) >= 0)
888 { 1955 {
889 coro_nready--; 1956 hv_store (hv, "desc", sizeof ("desc") - 1,
890 return av_shift (coro_ready [prio]); 1957 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
891 }
892 1958
893 return 0; 1959 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
894}
895
896static void
897api_ready (SV *coro)
898{
899 dTHX;
900
901 if (SvROK (coro))
902 coro = SvRV (coro);
903
904 LOCK;
905 coro_enq (SvREFCNT_inc (coro));
906 UNLOCK;
907}
908
909static void
910prepare_schedule (struct transfer_args *ta)
911{
912 SV *current, *prev, *next;
913
914 LOCK;
915
916 current = GvSV (coro_current);
917
918 for (;;)
919 {
920 LOCK;
921
922 next = coro_deq (PRIO_MIN);
923
924 if (next)
925 break;
926
927 UNLOCK;
928 1960
929 { 1961 {
930 dSP; 1962 dSP;
931 1963 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
932 ENTER;
933 SAVETMPS;
934
935 PUSHMARK (SP);
936 PUTBACK; 1964 PUTBACK;
937 call_sv (GvSV (coro_idle), G_DISCARD);
938
939 FREETMPS;
940 LEAVE;
941 } 1965 }
1966
1967 SvREFCNT_dec (GvAV (PL_defgv));
1968 GvAV (PL_defgv) = coro->invoke_av;
1969 coro->invoke_av = 0;
1970
1971 return 0;
1972 }
1973}
1974
1975static void
1976slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1977{
1978 HV *hv = (HV *)SvRV (coro_current);
1979 struct coro *coro = SvSTATE_hv ((SV *)hv);
1980
1981 if (expect_true (coro->saved_deffh))
942 } 1982 {
1983 /* subsequent iteration */
1984 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1985 coro->saved_deffh = 0;
943 1986
944 prev = SvRV (current); 1987 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
945 SvRV (current) = next; 1988 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1989 {
1990 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1991 coro->invoke_av = newAV ();
946 1992
947 /* free this only after the transfer */ 1993 frame->prepare = prepare_nop;
948 free_coro_mortal (); 1994 }
949 coro_mortal = prev; 1995 else
1996 {
1997 av_clear (GvAV (PL_defgv));
1998 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
950 1999
951 ta->prev = SvSTATE (prev); 2000 coro->prio = 0;
952 ta->next = SvSTATE (next);
953 ta->flags = TRANSFER_SAVE_ALL;
954 2001
955 UNLOCK; 2002 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
956} 2003 api_trace (aTHX_ coro_current, 0);
957 2004
2005 frame->prepare = prepare_schedule;
2006 av_push (av_async_pool, SvREFCNT_inc (hv));
2007 }
2008 }
2009 else
2010 {
2011 /* first iteration, simply fall through */
2012 frame->prepare = prepare_nop;
2013 }
2014
2015 frame->check = slf_check_pool_handler;
2016 frame->data = (void *)coro;
2017}
2018
2019/*****************************************************************************/
2020/* rouse callback */
2021
2022#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2023
2024static void
2025coro_rouse_callback (pTHX_ CV *cv)
2026{
2027 dXSARGS;
2028 SV *data = (SV *)S_GENSUB_ARG;
2029
2030 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2031 {
2032 /* first call, set args */
2033 SV *coro = SvRV (data);
2034 AV *av = newAV ();
2035
2036 SvRV_set (data, (SV *)av);
2037
2038 /* better take a full copy of the arguments */
2039 while (items--)
2040 av_store (av, items, newSVsv (ST (items)));
2041
2042 api_ready (aTHX_ coro);
2043 SvREFCNT_dec (coro);
2044 }
2045
2046 XSRETURN_EMPTY;
2047}
2048
958static void 2049static int
2050slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2051{
2052 SV *data = (SV *)frame->data;
2053
2054 if (CORO_THROW)
2055 return 0;
2056
2057 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2058 return 1;
2059
2060 /* now push all results on the stack */
2061 {
2062 dSP;
2063 AV *av = (AV *)SvRV (data);
2064 int i;
2065
2066 EXTEND (SP, AvFILLp (av) + 1);
2067 for (i = 0; i <= AvFILLp (av); ++i)
2068 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2069
2070 /* we have stolen the elements, so set length to zero and free */
2071 AvFILLp (av) = -1;
2072 av_undef (av);
2073
2074 PUTBACK;
2075 }
2076
2077 return 0;
2078}
2079
2080static void
2081slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2082{
2083 SV *cb;
2084
2085 if (items)
2086 cb = arg [0];
2087 else
2088 {
2089 struct coro *coro = SvSTATE_current;
2090
2091 if (!coro->rouse_cb)
2092 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2093
2094 cb = sv_2mortal (coro->rouse_cb);
2095 coro->rouse_cb = 0;
2096 }
2097
2098 if (!SvROK (cb)
2099 || SvTYPE (SvRV (cb)) != SVt_PVCV
2100 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2101 croak ("Coro::rouse_wait called with illegal callback argument,");
2102
2103 {
2104 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2105 SV *data = (SV *)S_GENSUB_ARG;
2106
2107 frame->data = (void *)data;
2108 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2109 frame->check = slf_check_rouse_wait;
2110 }
2111}
2112
2113static SV *
2114coro_new_rouse_cb (pTHX)
2115{
2116 HV *hv = (HV *)SvRV (coro_current);
2117 struct coro *coro = SvSTATE_hv (hv);
2118 SV *data = newRV_inc ((SV *)hv);
2119 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2120
2121 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2122 SvREFCNT_dec (data); /* magicext increases the refcount */
2123
2124 SvREFCNT_dec (coro->rouse_cb);
2125 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2126
2127 return cb;
2128}
2129
2130/*****************************************************************************/
2131/* schedule-like-function opcode (SLF) */
2132
2133static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2134static const CV *slf_cv;
2135static SV **slf_argv;
2136static int slf_argc, slf_arga; /* count, allocated */
2137static I32 slf_ax; /* top of stack, for restore */
2138
2139/* this restores the stack in the case we patched the entersub, to */
2140/* recreate the stack frame as perl will on following calls */
2141/* since entersub cleared the stack */
2142static OP *
2143pp_restore (pTHX)
2144{
2145 int i;
2146 SV **SP = PL_stack_base + slf_ax;
2147
2148 PUSHMARK (SP);
2149
2150 EXTEND (SP, slf_argc + 1);
2151
2152 for (i = 0; i < slf_argc; ++i)
2153 PUSHs (sv_2mortal (slf_argv [i]));
2154
2155 PUSHs ((SV *)CvGV (slf_cv));
2156
2157 RETURNOP (slf_restore.op_first);
2158}
2159
2160static void
2161slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2162{
2163 SV **arg = (SV **)slf_frame.data;
2164
2165 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2166}
2167
2168static void
2169slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2170{
2171 if (items != 2)
2172 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2173
2174 frame->prepare = slf_prepare_transfer;
2175 frame->check = slf_check_nop;
2176 frame->data = (void *)arg; /* let's hope it will stay valid */
2177}
2178
2179static void
2180slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2181{
2182 frame->prepare = prepare_schedule;
2183 frame->check = slf_check_nop;
2184}
2185
2186static void
959prepare_cede (struct transfer_args *ta) 2187slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
960{ 2188{
961 LOCK; 2189 struct coro *next = (struct coro *)slf_frame.data;
962 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
963 UNLOCK;
964 2190
2191 SvREFCNT_inc_NN (next->hv);
965 prepare_schedule (ta); 2192 prepare_schedule_to (aTHX_ ta, next);
966} 2193}
967 2194
968static void 2195static void
969api_schedule (void) 2196slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
970{ 2197{
971 dTHX; 2198 if (!items)
2199 croak ("Coro::schedule_to expects a coroutine argument, caught");
2200
2201 frame->data = (void *)SvSTATE (arg [0]);
2202 frame->prepare = slf_prepare_schedule_to;
2203 frame->check = slf_check_nop;
2204}
2205
2206static void
2207slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2208{
2209 api_ready (aTHX_ SvRV (coro_current));
2210
2211 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2212}
2213
2214static void
2215slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2216{
2217 frame->prepare = prepare_cede;
2218 frame->check = slf_check_nop;
2219}
2220
2221static void
2222slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2223{
2224 frame->prepare = prepare_cede_notself;
2225 frame->check = slf_check_nop;
2226}
2227
2228/*
2229 * these not obviously related functions are all rolled into one
2230 * function to increase chances that they all will call transfer with the same
2231 * stack offset
2232 * SLF stands for "schedule-like-function".
2233 */
2234static OP *
2235pp_slf (pTHX)
2236{
2237 I32 checkmark; /* mark SP to see how many elements check has pushed */
2238
2239 /* set up the slf frame, unless it has already been set-up */
2240 /* the latter happens when a new coro has been started */
2241 /* or when a new cctx was attached to an existing coroutine */
2242 if (expect_true (!slf_frame.prepare))
2243 {
2244 /* first iteration */
2245 dSP;
2246 SV **arg = PL_stack_base + TOPMARK + 1;
2247 int items = SP - arg; /* args without function object */
2248 SV *gv = *sp;
2249
2250 /* do a quick consistency check on the "function" object, and if it isn't */
2251 /* for us, divert to the real entersub */
2252 if (SvTYPE (gv) != SVt_PVGV
2253 || !GvCV (gv)
2254 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2255 return PL_ppaddr[OP_ENTERSUB](aTHX);
2256
2257 if (!(PL_op->op_flags & OPf_STACKED))
2258 {
2259 /* ampersand-form of call, use @_ instead of stack */
2260 AV *av = GvAV (PL_defgv);
2261 arg = AvARRAY (av);
2262 items = AvFILLp (av) + 1;
2263 }
2264
2265 /* now call the init function, which needs to set up slf_frame */
2266 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2267 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2268
2269 /* pop args */
2270 SP = PL_stack_base + POPMARK;
2271
2272 PUTBACK;
2273 }
2274
2275 /* now that we have a slf_frame, interpret it! */
2276 /* we use a callback system not to make the code needlessly */
2277 /* complicated, but so we can run multiple perl coros from one cctx */
2278
2279 do
2280 {
972 struct transfer_args ta; 2281 struct coro_transfer_args ta;
973 2282
974 prepare_schedule (&ta); 2283 slf_frame.prepare (aTHX_ &ta);
975 TRANSFER (ta); 2284 TRANSFER (ta, 0);
976}
977 2285
2286 checkmark = PL_stack_sp - PL_stack_base;
2287 }
2288 while (slf_frame.check (aTHX_ &slf_frame));
2289
2290 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2291
2292 /* exception handling */
2293 if (expect_false (CORO_THROW))
2294 {
2295 SV *exception = sv_2mortal (CORO_THROW);
2296
2297 CORO_THROW = 0;
2298 sv_setsv (ERRSV, exception);
2299 croak (0);
2300 }
2301
2302 /* return value handling - mostly like entersub */
2303 /* make sure we put something on the stack in scalar context */
2304 if (GIMME_V == G_SCALAR)
2305 {
2306 dSP;
2307 SV **bot = PL_stack_base + checkmark;
2308
2309 if (sp == bot) /* too few, push undef */
2310 bot [1] = &PL_sv_undef;
2311 else if (sp != bot + 1) /* too many, take last one */
2312 bot [1] = *sp;
2313
2314 SP = bot + 1;
2315
2316 PUTBACK;
2317 }
2318
2319 return NORMAL;
2320}
2321
2322static void
2323api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2324{
2325 int i;
2326 SV **arg = PL_stack_base + ax;
2327 int items = PL_stack_sp - arg + 1;
2328
2329 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2330
2331 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2332 && PL_op->op_ppaddr != pp_slf)
2333 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2334
2335 CvFLAGS (cv) |= CVf_SLF;
2336 CvNODEBUG_on (cv);
2337 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2338 slf_cv = cv;
2339
2340 /* we patch the op, and then re-run the whole call */
2341 /* we have to put the same argument on the stack for this to work */
2342 /* and this will be done by pp_restore */
2343 slf_restore.op_next = (OP *)&slf_restore;
2344 slf_restore.op_type = OP_CUSTOM;
2345 slf_restore.op_ppaddr = pp_restore;
2346 slf_restore.op_first = PL_op;
2347
2348 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2349
2350 if (PL_op->op_flags & OPf_STACKED)
2351 {
2352 if (items > slf_arga)
2353 {
2354 slf_arga = items;
2355 free (slf_argv);
2356 slf_argv = malloc (slf_arga * sizeof (SV *));
2357 }
2358
2359 slf_argc = items;
2360
2361 for (i = 0; i < items; ++i)
2362 slf_argv [i] = SvREFCNT_inc (arg [i]);
2363 }
2364 else
2365 slf_argc = 0;
2366
2367 PL_op->op_ppaddr = pp_slf;
2368 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2369
2370 PL_op = (OP *)&slf_restore;
2371}
2372
2373/*****************************************************************************/
2374/* dynamic wind */
2375
2376static void
2377on_enterleave_call (pTHX_ SV *cb)
2378{
2379 dSP;
2380
2381 PUSHSTACK;
2382
2383 PUSHMARK (SP);
2384 PUTBACK;
2385 call_sv (cb, G_VOID | G_DISCARD);
2386 SPAGAIN;
2387
2388 POPSTACK;
2389}
2390
2391static SV *
2392coro_avp_pop_and_free (pTHX_ AV **avp)
2393{
2394 AV *av = *avp;
2395 SV *res = av_pop (av);
2396
2397 if (AvFILLp (av) < 0)
2398 {
2399 *avp = 0;
2400 SvREFCNT_dec (av);
2401 }
2402
2403 return res;
2404}
2405
2406static void
2407coro_pop_on_enter (pTHX_ void *coro)
2408{
2409 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2410 SvREFCNT_dec (cb);
2411}
2412
2413static void
2414coro_pop_on_leave (pTHX_ void *coro)
2415{
2416 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2417 on_enterleave_call (aTHX_ sv_2mortal (cb));
2418}
2419
2420/*****************************************************************************/
2421/* PerlIO::cede */
2422
2423typedef struct
2424{
2425 PerlIOBuf base;
2426 NV next, every;
2427} PerlIOCede;
2428
2429static IV
2430PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2431{
2432 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2433
2434 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2435 self->next = nvtime () + self->every;
2436
2437 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2438}
2439
2440static SV *
2441PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2442{
2443 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2444
2445 return newSVnv (self->every);
2446}
2447
2448static IV
2449PerlIOCede_flush (pTHX_ PerlIO *f)
2450{
2451 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2452 double now = nvtime ();
2453
2454 if (now >= self->next)
2455 {
2456 api_cede (aTHX);
2457 self->next = now + self->every;
2458 }
2459
2460 return PerlIOBuf_flush (aTHX_ f);
2461}
2462
2463static PerlIO_funcs PerlIO_cede =
2464{
2465 sizeof(PerlIO_funcs),
2466 "cede",
2467 sizeof(PerlIOCede),
2468 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2469 PerlIOCede_pushed,
2470 PerlIOBuf_popped,
2471 PerlIOBuf_open,
2472 PerlIOBase_binmode,
2473 PerlIOCede_getarg,
2474 PerlIOBase_fileno,
2475 PerlIOBuf_dup,
2476 PerlIOBuf_read,
2477 PerlIOBuf_unread,
2478 PerlIOBuf_write,
2479 PerlIOBuf_seek,
2480 PerlIOBuf_tell,
2481 PerlIOBuf_close,
2482 PerlIOCede_flush,
2483 PerlIOBuf_fill,
2484 PerlIOBase_eof,
2485 PerlIOBase_error,
2486 PerlIOBase_clearerr,
2487 PerlIOBase_setlinebuf,
2488 PerlIOBuf_get_base,
2489 PerlIOBuf_bufsiz,
2490 PerlIOBuf_get_ptr,
2491 PerlIOBuf_get_cnt,
2492 PerlIOBuf_set_ptrcnt,
2493};
2494
2495/*****************************************************************************/
2496/* Coro::Semaphore & Coro::Signal */
2497
2498static SV *
2499coro_waitarray_new (pTHX_ int count)
2500{
2501 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2502 AV *av = newAV ();
2503 SV **ary;
2504
2505 /* unfortunately, building manually saves memory */
2506 Newx (ary, 2, SV *);
2507 AvALLOC (av) = ary;
2508#if PERL_VERSION_ATLEAST (5,10,0)
2509 AvARRAY (av) = ary;
2510#else
2511 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2512 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2513 SvPVX ((SV *)av) = (char *)ary;
2514#endif
2515 AvMAX (av) = 1;
2516 AvFILLp (av) = 0;
2517 ary [0] = newSViv (count);
2518
2519 return newRV_noinc ((SV *)av);
2520}
2521
2522/* semaphore */
2523
2524static void
2525coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2526{
2527 SV *count_sv = AvARRAY (av)[0];
2528 IV count = SvIVX (count_sv);
2529
2530 count += adjust;
2531 SvIVX (count_sv) = count;
2532
2533 /* now wake up as many waiters as are expected to lock */
2534 while (count > 0 && AvFILLp (av) > 0)
2535 {
2536 SV *cb;
2537
2538 /* swap first two elements so we can shift a waiter */
2539 AvARRAY (av)[0] = AvARRAY (av)[1];
2540 AvARRAY (av)[1] = count_sv;
2541 cb = av_shift (av);
2542
2543 if (SvOBJECT (cb))
2544 {
2545 api_ready (aTHX_ cb);
2546 --count;
2547 }
2548 else if (SvTYPE (cb) == SVt_PVCV)
2549 {
2550 dSP;
2551 PUSHMARK (SP);
2552 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2553 PUTBACK;
2554 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2555 }
2556
2557 SvREFCNT_dec (cb);
2558 }
2559}
2560
2561static void
2562coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2563{
2564 /* call $sem->adjust (0) to possibly wake up some other waiters */
2565 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2566}
2567
978static void 2568static int
979api_cede (void) 2569slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
980{ 2570{
981 dTHX; 2571 AV *av = (AV *)frame->data;
982 struct transfer_args ta; 2572 SV *count_sv = AvARRAY (av)[0];
983 2573
984 prepare_cede (&ta); 2574 /* if we are about to throw, don't actually acquire the lock, just throw */
985 TRANSFER (ta); 2575 if (CORO_THROW)
986} 2576 return 0;
2577 else if (SvIVX (count_sv) > 0)
2578 {
2579 SvSTATE_current->on_destroy = 0;
987 2580
2581 if (acquire)
2582 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2583 else
2584 coro_semaphore_adjust (aTHX_ av, 0);
2585
2586 return 0;
2587 }
2588 else
2589 {
2590 int i;
2591 /* if we were woken up but can't down, we look through the whole */
2592 /* waiters list and only add us if we aren't in there already */
2593 /* this avoids some degenerate memory usage cases */
2594
2595 for (i = 1; i <= AvFILLp (av); ++i)
2596 if (AvARRAY (av)[i] == SvRV (coro_current))
2597 return 1;
2598
2599 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2600 return 1;
2601 }
2602}
2603
2604static int
2605slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2606{
2607 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2608}
2609
2610static int
2611slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2612{
2613 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2614}
2615
2616static void
2617slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2618{
2619 AV *av = (AV *)SvRV (arg [0]);
2620
2621 if (SvIVX (AvARRAY (av)[0]) > 0)
2622 {
2623 frame->data = (void *)av;
2624 frame->prepare = prepare_nop;
2625 }
2626 else
2627 {
2628 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2629
2630 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2631 frame->prepare = prepare_schedule;
2632
2633 /* to avoid race conditions when a woken-up coro gets terminated */
2634 /* we arrange for a temporary on_destroy that calls adjust (0) */
2635 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2636 }
2637}
2638
2639static void
2640slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2641{
2642 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2643 frame->check = slf_check_semaphore_down;
2644}
2645
2646static void
2647slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2648{
2649 if (items >= 2)
2650 {
2651 /* callback form */
2652 AV *av = (AV *)SvRV (arg [0]);
2653 SV *cb_cv = s_get_cv_croak (arg [1]);
2654
2655 av_push (av, SvREFCNT_inc_NN (cb_cv));
2656
2657 if (SvIVX (AvARRAY (av)[0]) > 0)
2658 coro_semaphore_adjust (aTHX_ av, 0);
2659
2660 frame->prepare = prepare_nop;
2661 frame->check = slf_check_nop;
2662 }
2663 else
2664 {
2665 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2666 frame->check = slf_check_semaphore_wait;
2667 }
2668}
2669
2670/* signal */
2671
2672static void
2673coro_signal_wake (pTHX_ AV *av, int count)
2674{
2675 SvIVX (AvARRAY (av)[0]) = 0;
2676
2677 /* now signal count waiters */
2678 while (count > 0 && AvFILLp (av) > 0)
2679 {
2680 SV *cb;
2681
2682 /* swap first two elements so we can shift a waiter */
2683 cb = AvARRAY (av)[0];
2684 AvARRAY (av)[0] = AvARRAY (av)[1];
2685 AvARRAY (av)[1] = cb;
2686
2687 cb = av_shift (av);
2688
2689 if (SvTYPE (cb) == SVt_PVCV)
2690 {
2691 dSP;
2692 PUSHMARK (SP);
2693 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2694 PUTBACK;
2695 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2696 }
2697 else
2698 {
2699 api_ready (aTHX_ cb);
2700 sv_setiv (cb, 0); /* signal waiter */
2701 }
2702
2703 SvREFCNT_dec (cb);
2704
2705 --count;
2706 }
2707}
2708
2709static int
2710slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2711{
2712 /* if we are about to throw, also stop waiting */
2713 return SvROK ((SV *)frame->data) && !CORO_THROW;
2714}
2715
2716static void
2717slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2718{
2719 AV *av = (AV *)SvRV (arg [0]);
2720
2721 if (items >= 2)
2722 {
2723 SV *cb_cv = s_get_cv_croak (arg [1]);
2724 av_push (av, SvREFCNT_inc_NN (cb_cv));
2725
2726 if (SvIVX (AvARRAY (av)[0]))
2727 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2728
2729 frame->prepare = prepare_nop;
2730 frame->check = slf_check_nop;
2731 }
2732 else if (SvIVX (AvARRAY (av)[0]))
2733 {
2734 SvIVX (AvARRAY (av)[0]) = 0;
2735 frame->prepare = prepare_nop;
2736 frame->check = slf_check_nop;
2737 }
2738 else
2739 {
2740 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2741
2742 av_push (av, waiter);
2743
2744 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2745 frame->prepare = prepare_schedule;
2746 frame->check = slf_check_signal_wait;
2747 }
2748}
2749
2750/*****************************************************************************/
2751/* Coro::AIO */
2752
2753#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2754
2755/* helper storage struct */
2756struct io_state
2757{
2758 int errorno;
2759 I32 laststype; /* U16 in 5.10.0 */
2760 int laststatval;
2761 Stat_t statcache;
2762};
2763
2764static void
2765coro_aio_callback (pTHX_ CV *cv)
2766{
2767 dXSARGS;
2768 AV *state = (AV *)S_GENSUB_ARG;
2769 SV *coro = av_pop (state);
2770 SV *data_sv = newSV (sizeof (struct io_state));
2771
2772 av_extend (state, items - 1);
2773
2774 sv_upgrade (data_sv, SVt_PV);
2775 SvCUR_set (data_sv, sizeof (struct io_state));
2776 SvPOK_only (data_sv);
2777
2778 {
2779 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2780
2781 data->errorno = errno;
2782 data->laststype = PL_laststype;
2783 data->laststatval = PL_laststatval;
2784 data->statcache = PL_statcache;
2785 }
2786
2787 /* now build the result vector out of all the parameters and the data_sv */
2788 {
2789 int i;
2790
2791 for (i = 0; i < items; ++i)
2792 av_push (state, SvREFCNT_inc_NN (ST (i)));
2793 }
2794
2795 av_push (state, data_sv);
2796
2797 api_ready (aTHX_ coro);
2798 SvREFCNT_dec (coro);
2799 SvREFCNT_dec ((AV *)state);
2800}
2801
2802static int
2803slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2804{
2805 AV *state = (AV *)frame->data;
2806
2807 /* if we are about to throw, return early */
2808 /* this does not cancel the aio request, but at least */
2809 /* it quickly returns */
2810 if (CORO_THROW)
2811 return 0;
2812
2813 /* one element that is an RV? repeat! */
2814 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2815 return 1;
2816
2817 /* restore status */
2818 {
2819 SV *data_sv = av_pop (state);
2820 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2821
2822 errno = data->errorno;
2823 PL_laststype = data->laststype;
2824 PL_laststatval = data->laststatval;
2825 PL_statcache = data->statcache;
2826
2827 SvREFCNT_dec (data_sv);
2828 }
2829
2830 /* push result values */
2831 {
2832 dSP;
2833 int i;
2834
2835 EXTEND (SP, AvFILLp (state) + 1);
2836 for (i = 0; i <= AvFILLp (state); ++i)
2837 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2838
2839 PUTBACK;
2840 }
2841
2842 return 0;
2843}
2844
2845static void
2846slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2847{
2848 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2849 SV *coro_hv = SvRV (coro_current);
2850 struct coro *coro = SvSTATE_hv (coro_hv);
2851
2852 /* put our coroutine id on the state arg */
2853 av_push (state, SvREFCNT_inc_NN (coro_hv));
2854
2855 /* first see whether we have a non-zero priority and set it as AIO prio */
2856 if (coro->prio)
2857 {
2858 dSP;
2859
2860 static SV *prio_cv;
2861 static SV *prio_sv;
2862
2863 if (expect_false (!prio_cv))
2864 {
2865 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2866 prio_sv = newSViv (0);
2867 }
2868
2869 PUSHMARK (SP);
2870 sv_setiv (prio_sv, coro->prio);
2871 XPUSHs (prio_sv);
2872
2873 PUTBACK;
2874 call_sv (prio_cv, G_VOID | G_DISCARD);
2875 }
2876
2877 /* now call the original request */
2878 {
2879 dSP;
2880 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2881 int i;
2882
2883 PUSHMARK (SP);
2884
2885 /* first push all args to the stack */
2886 EXTEND (SP, items + 1);
2887
2888 for (i = 0; i < items; ++i)
2889 PUSHs (arg [i]);
2890
2891 /* now push the callback closure */
2892 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2893
2894 /* now call the AIO function - we assume our request is uncancelable */
2895 PUTBACK;
2896 call_sv ((SV *)req, G_VOID | G_DISCARD);
2897 }
2898
2899 /* now that the requets is going, we loop toll we have a result */
2900 frame->data = (void *)state;
2901 frame->prepare = prepare_schedule;
2902 frame->check = slf_check_aio_req;
2903}
2904
2905static void
2906coro_aio_req_xs (pTHX_ CV *cv)
2907{
2908 dXSARGS;
2909
2910 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2911
2912 XSRETURN_EMPTY;
2913}
2914
2915/*****************************************************************************/
2916
2917#if CORO_CLONE
2918# include "clone.c"
2919#endif
2920
2921/*****************************************************************************/
2922
2923static SV *
2924coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2925{
2926 SV *coro_sv;
2927 struct coro *coro;
2928 MAGIC *mg;
2929 HV *hv;
2930 SV *cb;
2931 int i;
2932
2933 if (argc > 0)
2934 {
2935 cb = s_get_cv_croak (argv [0]);
2936
2937 if (!is_coro)
2938 {
2939 if (CvISXSUB (cb))
2940 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2941
2942 if (!CvROOT (cb))
2943 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2944 }
2945 }
2946
2947 Newz (0, coro, 1, struct coro);
2948 coro->args = newAV ();
2949 coro->flags = CF_NEW;
2950
2951 if (coro_first) coro_first->prev = coro;
2952 coro->next = coro_first;
2953 coro_first = coro;
2954
2955 coro->hv = hv = newHV ();
2956 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2957 mg->mg_flags |= MGf_DUP;
2958 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
2959
2960 if (argc > 0)
2961 {
2962 av_extend (coro->args, argc + is_coro - 1);
2963
2964 if (is_coro)
2965 {
2966 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2967 cb = (SV *)cv_coro_run;
2968 }
2969
2970 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2971
2972 for (i = 1; i < argc; i++)
2973 av_push (coro->args, newSVsv (argv [i]));
2974 }
2975
2976 return coro_sv;
2977}
2978
988MODULE = Coro::State PACKAGE = Coro::State 2979MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
989 2980
990PROTOTYPES: DISABLE 2981PROTOTYPES: DISABLE
991 2982
992BOOT: 2983BOOT:
993{ 2984{
994#ifdef USE_ITHREADS 2985#ifdef USE_ITHREADS
995 MUTEX_INIT (&coro_mutex); 2986# if CORO_PTHREAD
2987 coro_thx = PERL_GET_CONTEXT;
2988# endif
996#endif 2989#endif
997 BOOT_PAGESIZE; 2990 BOOT_PAGESIZE;
998 2991
2992 cctx_current = cctx_new_empty ();
2993
2994 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2995 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2996
2997 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2998 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2999 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3000
3001 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3002 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3003 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3004
999 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3005 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1000 3006
1001 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3007 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1002 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3008 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1003 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3009 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3010 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1004 3011
1005 main_mainstack = PL_mainstack; 3012 main_mainstack = PL_mainstack;
3013 main_top_env = PL_top_env;
1006 3014
3015 while (main_top_env->je_prev)
3016 main_top_env = main_top_env->je_prev;
3017
3018 {
3019 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3020
3021 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3022 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3023
3024 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3025 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3026 }
3027
1007 coroapi.ver = CORO_API_VERSION; 3028 coroapi.ver = CORO_API_VERSION;
3029 coroapi.rev = CORO_API_REVISION;
3030
1008 coroapi.transfer = api_transfer; 3031 coroapi.transfer = api_transfer;
1009 3032
3033 coroapi.sv_state = SvSTATE_;
3034 coroapi.execute_slf = api_execute_slf;
3035 coroapi.prepare_nop = prepare_nop;
3036 coroapi.prepare_schedule = prepare_schedule;
3037 coroapi.prepare_cede = prepare_cede;
3038 coroapi.prepare_cede_notself = prepare_cede_notself;
3039
3040 {
3041 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3042
3043 if (!svp) croak ("Time::HiRes is required");
3044 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3045
3046 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3047
3048 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3049 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3050 }
3051
1010 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3052 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1011} 3053}
1012 3054
1013SV * 3055SV *
1014new (char *klass, ...) 3056new (SV *klass, ...)
3057 ALIAS:
3058 Coro::new = 1
1015 CODE: 3059 CODE:
1016{ 3060 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1017 struct coro *coro; 3061 OUTPUT:
1018 HV *hv;
1019 int i;
1020
1021 Newz (0, coro, 1, struct coro);
1022 coro->args = newAV ();
1023
1024 hv = newHV ();
1025 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1026 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027
1028 for (i = 1; i < items; i++)
1029 av_push (coro->args, newSVsv (ST (i)));
1030
1031 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1032 /*coro->stack = 0;*/
1033}
1034 OUTPUT:
1035 RETVAL 3062 RETVAL
1036 3063
1037void 3064void
1038_set_stacklevel (...) 3065transfer (...)
1039 ALIAS: 3066 PROTOTYPE: $$
1040 Coro::State::transfer = 1 3067 CODE:
1041 Coro::schedule = 2 3068 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1042 Coro::cede = 3
1043 Coro::Cont::yield = 4
1044 CODE:
1045{
1046 struct transfer_args ta;
1047 3069
1048 switch (ix) 3070bool
1049 { 3071_destroy (SV *coro_sv)
1050 case 0: 3072 CODE:
1051 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 3073 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1052 ta.next = 0; 3074 OUTPUT:
1053 ta.flags = TRANSFER_SET_STACKLEVEL; 3075 RETVAL
1054 break;
1055
1056 case 1:
1057 if (items != 3)
1058 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1059
1060 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1061 break;
1062
1063 case 2:
1064 prepare_schedule (&ta);
1065 break;
1066
1067 case 3:
1068 prepare_cede (&ta);
1069 break;
1070
1071 case 4:
1072 {
1073 SV *yieldstack;
1074 SV *sv;
1075 AV *defav = GvAV (PL_defgv);
1076
1077 yieldstack = *hv_fetch (
1078 (HV *)SvRV (GvSV (coro_current)),
1079 "yieldstack", sizeof ("yieldstack") - 1,
1080 0
1081 );
1082
1083 /* set up @_ -- ugly */
1084 av_clear (defav);
1085 av_fill (defav, items - 1);
1086 while (items--)
1087 av_store (defav, items, SvREFCNT_inc (ST(items)));
1088
1089 sv = av_pop ((AV *)SvRV (yieldstack));
1090 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1091 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1092 ta.flags = 0;
1093 SvREFCNT_dec (sv);
1094 }
1095 break;
1096
1097 }
1098
1099 TRANSFER (ta);
1100}
1101 3076
1102void 3077void
1103_clone_state_from (SV *dst, SV *src)
1104 CODE:
1105{
1106 struct coro *coro_src = SvSTATE (src);
1107
1108 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1109
1110 ++coro_src->refcnt;
1111 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1112}
1113
1114void
1115_nonlocal_goto (IV nextop)
1116 CODE:
1117 /* uuh, somebody will kill me again for this */
1118 PL_op->op_next = INT2PTR (OP *, nextop);
1119
1120void
1121_exit (code) 3078_exit (int code)
1122 int code
1123 PROTOTYPE: $ 3079 PROTOTYPE: $
1124 CODE: 3080 CODE:
1125 _exit (code); 3081 _exit (code);
1126 3082
3083SV *
3084clone (Coro::State coro)
3085 CODE:
3086{
3087#if CORO_CLONE
3088 struct coro *ncoro = coro_clone (aTHX_ coro);
3089 MAGIC *mg;
3090 /* TODO: too much duplication */
3091 ncoro->hv = newHV ();
3092 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3093 mg->mg_flags |= MGf_DUP;
3094 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3095#else
3096 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3097#endif
3098}
3099 OUTPUT:
3100 RETVAL
3101
3102int
3103cctx_stacksize (int new_stacksize = 0)
3104 PROTOTYPE: ;$
3105 CODE:
3106 RETVAL = cctx_stacksize;
3107 if (new_stacksize)
3108 {
3109 cctx_stacksize = new_stacksize;
3110 ++cctx_gen;
3111 }
3112 OUTPUT:
3113 RETVAL
3114
3115int
3116cctx_max_idle (int max_idle = 0)
3117 PROTOTYPE: ;$
3118 CODE:
3119 RETVAL = cctx_max_idle;
3120 if (max_idle > 1)
3121 cctx_max_idle = max_idle;
3122 OUTPUT:
3123 RETVAL
3124
3125int
3126cctx_count ()
3127 PROTOTYPE:
3128 CODE:
3129 RETVAL = cctx_count;
3130 OUTPUT:
3131 RETVAL
3132
3133int
3134cctx_idle ()
3135 PROTOTYPE:
3136 CODE:
3137 RETVAL = cctx_idle;
3138 OUTPUT:
3139 RETVAL
3140
3141void
3142list ()
3143 PROTOTYPE:
3144 PPCODE:
3145{
3146 struct coro *coro;
3147 for (coro = coro_first; coro; coro = coro->next)
3148 if (coro->hv)
3149 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3150}
3151
3152void
3153call (Coro::State coro, SV *coderef)
3154 ALIAS:
3155 eval = 1
3156 CODE:
3157{
3158 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3159 {
3160 struct coro *current = SvSTATE_current;
3161
3162 if (current != coro)
3163 {
3164 PUTBACK;
3165 save_perl (aTHX_ current);
3166 load_perl (aTHX_ coro);
3167 SPAGAIN;
3168 }
3169
3170 PUSHSTACK;
3171
3172 PUSHMARK (SP);
3173 PUTBACK;
3174
3175 if (ix)
3176 eval_sv (coderef, 0);
3177 else
3178 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3179
3180 POPSTACK;
3181 SPAGAIN;
3182
3183 if (current != coro)
3184 {
3185 PUTBACK;
3186 save_perl (aTHX_ coro);
3187 load_perl (aTHX_ current);
3188 SPAGAIN;
3189 }
3190 }
3191}
3192
3193SV *
3194is_ready (Coro::State coro)
3195 PROTOTYPE: $
3196 ALIAS:
3197 is_ready = CF_READY
3198 is_running = CF_RUNNING
3199 is_new = CF_NEW
3200 is_destroyed = CF_DESTROYED
3201 is_suspended = CF_SUSPENDED
3202 CODE:
3203 RETVAL = boolSV (coro->flags & ix);
3204 OUTPUT:
3205 RETVAL
3206
3207void
3208throw (Coro::State self, SV *throw = &PL_sv_undef)
3209 PROTOTYPE: $;$
3210 CODE:
3211{
3212 struct coro *current = SvSTATE_current;
3213 SV **throwp = self == current ? &CORO_THROW : &self->except;
3214 SvREFCNT_dec (*throwp);
3215 SvGETMAGIC (throw);
3216 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3217}
3218
3219void
3220api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3221 PROTOTYPE: $;$
3222 C_ARGS: aTHX_ coro, flags
3223
3224SV *
3225has_cctx (Coro::State coro)
3226 PROTOTYPE: $
3227 CODE:
3228 /* maybe manage the running flag differently */
3229 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3230 OUTPUT:
3231 RETVAL
3232
3233int
3234is_traced (Coro::State coro)
3235 PROTOTYPE: $
3236 CODE:
3237 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3238 OUTPUT:
3239 RETVAL
3240
3241UV
3242rss (Coro::State coro)
3243 PROTOTYPE: $
3244 ALIAS:
3245 usecount = 1
3246 CODE:
3247 switch (ix)
3248 {
3249 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3250 case 1: RETVAL = coro->usecount; break;
3251 }
3252 OUTPUT:
3253 RETVAL
3254
3255void
3256force_cctx ()
3257 PROTOTYPE:
3258 CODE:
3259 cctx_current->idle_sp = 0;
3260
3261void
3262swap_defsv (Coro::State self)
3263 PROTOTYPE: $
3264 ALIAS:
3265 swap_defav = 1
3266 CODE:
3267 if (!self->slot)
3268 croak ("cannot swap state with coroutine that has no saved state,");
3269 else
3270 {
3271 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3272 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3273
3274 SV *tmp = *src; *src = *dst; *dst = tmp;
3275 }
3276
3277void
3278cancel (Coro::State self)
3279 CODE:
3280 coro_state_destroy (aTHX_ self);
3281 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3282
3283
3284SV *
3285enable_times (int enabled = enable_times)
3286 CODE:
3287{
3288 RETVAL = boolSV (enable_times);
3289
3290 if (enabled != enable_times)
3291 {
3292 enable_times = enabled;
3293
3294 coro_times_update ();
3295 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3296 }
3297}
3298 OUTPUT:
3299 RETVAL
3300
3301void
3302times (Coro::State self)
3303 PPCODE:
3304{
3305 struct coro *current = SvSTATE (coro_current);
3306
3307 if (expect_false (current == self))
3308 {
3309 coro_times_update ();
3310 coro_times_add (SvSTATE (coro_current));
3311 }
3312
3313 EXTEND (SP, 2);
3314 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3315 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3316
3317 if (expect_false (current == self))
3318 coro_times_sub (SvSTATE (coro_current));
3319}
3320
1127MODULE = Coro::State PACKAGE = Coro 3321MODULE = Coro::State PACKAGE = Coro
1128 3322
1129BOOT: 3323BOOT:
1130{ 3324{
1131 int i; 3325 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3326 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3327 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3328 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3329 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3330 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3331 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3332 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3333 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1132 3334
3335 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3336 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3337 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3338 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3339
1133 coro_stash = gv_stashpv ("Coro", TRUE); 3340 coro_stash = gv_stashpv ("Coro", TRUE);
1134 3341
1135 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3342 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1136 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3343 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1137 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3344 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1138 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3345 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1139 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3346 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1140 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3347 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1141
1142 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1143 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1144
1145 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1146 coro_ready[i] = newAV ();
1147 3348
1148 { 3349 {
1149 SV *sv = perl_get_sv("Coro::API", 1); 3350 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1150 3351
1151 coroapi.schedule = api_schedule; 3352 coroapi.schedule = api_schedule;
3353 coroapi.schedule_to = api_schedule_to;
1152 coroapi.cede = api_cede; 3354 coroapi.cede = api_cede;
3355 coroapi.cede_notself = api_cede_notself;
1153 coroapi.ready = api_ready; 3356 coroapi.ready = api_ready;
3357 coroapi.is_ready = api_is_ready;
1154 coroapi.nready = &coro_nready; 3358 coroapi.nready = coro_nready;
1155 coroapi.current = coro_current; 3359 coroapi.current = coro_current;
1156 3360
1157 GCoroAPI = &coroapi; 3361 /*GCoroAPI = &coroapi;*/
1158 sv_setiv (sv, (IV)&coroapi); 3362 sv_setiv (sv, (IV)&coroapi);
1159 SvREADONLY_on (sv); 3363 SvREADONLY_on (sv);
1160 } 3364 }
1161} 3365}
1162 3366
3367SV *
3368async (...)
3369 PROTOTYPE: &@
3370 CODE:
3371 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3372 api_ready (aTHX_ RETVAL);
3373 OUTPUT:
3374 RETVAL
3375
3376void
3377terminate (...)
3378 CODE:
3379 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3380
3381void
3382schedule (...)
3383 CODE:
3384 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3385
3386void
3387schedule_to (...)
3388 CODE:
3389 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3390
3391void
3392cede_to (...)
3393 CODE:
3394 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3395
3396void
3397cede (...)
3398 CODE:
3399 CORO_EXECUTE_SLF_XS (slf_init_cede);
3400
3401void
3402cede_notself (...)
3403 CODE:
3404 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3405
3406void
3407_set_current (SV *current)
3408 PROTOTYPE: $
3409 CODE:
3410 SvREFCNT_dec (SvRV (coro_current));
3411 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3412
3413void
3414_set_readyhook (SV *hook)
3415 PROTOTYPE: $
3416 CODE:
3417 SvREFCNT_dec (coro_readyhook);
3418 SvGETMAGIC (hook);
3419 if (SvOK (hook))
3420 {
3421 coro_readyhook = newSVsv (hook);
3422 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3423 }
3424 else
3425 {
3426 coro_readyhook = 0;
3427 CORO_READYHOOK = 0;
3428 }
3429
1163int 3430int
1164prio (Coro::State coro, int newprio = 0) 3431prio (Coro::State coro, int newprio = 0)
3432 PROTOTYPE: $;$
1165 ALIAS: 3433 ALIAS:
1166 nice = 1 3434 nice = 1
1167 CODE: 3435 CODE:
1168{ 3436{
1169 RETVAL = coro->prio; 3437 RETVAL = coro->prio;
1170 3438
1171 if (items > 1) 3439 if (items > 1)
1172 { 3440 {
1173 if (ix) 3441 if (ix)
1174 newprio += coro->prio; 3442 newprio = coro->prio - newprio;
1175 3443
1176 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3444 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1177 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3445 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1178 3446
1179 coro->prio = newprio; 3447 coro->prio = newprio;
1180 } 3448 }
1181} 3449}
3450 OUTPUT:
3451 RETVAL
1182 3452
1183void 3453SV *
1184ready (SV *self) 3454ready (SV *self)
1185 PROTOTYPE: $ 3455 PROTOTYPE: $
1186 CODE: 3456 CODE:
1187 api_ready (self); 3457 RETVAL = boolSV (api_ready (aTHX_ self));
3458 OUTPUT:
3459 RETVAL
1188 3460
1189int 3461int
1190nready (...) 3462nready (...)
1191 PROTOTYPE: 3463 PROTOTYPE:
1192 CODE: 3464 CODE:
1193 RETVAL = coro_nready; 3465 RETVAL = coro_nready;
1194 OUTPUT: 3466 OUTPUT:
1195 RETVAL 3467 RETVAL
1196 3468
1197MODULE = Coro::State PACKAGE = Coro::AIO 3469void
3470suspend (Coro::State self)
3471 PROTOTYPE: $
3472 CODE:
3473 self->flags |= CF_SUSPENDED;
3474
3475void
3476resume (Coro::State self)
3477 PROTOTYPE: $
3478 CODE:
3479 self->flags &= ~CF_SUSPENDED;
3480
3481void
3482_pool_handler (...)
3483 CODE:
3484 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3485
3486void
3487async_pool (SV *cv, ...)
3488 PROTOTYPE: &@
3489 PPCODE:
3490{
3491 HV *hv = (HV *)av_pop (av_async_pool);
3492 AV *av = newAV ();
3493 SV *cb = ST (0);
3494 int i;
3495
3496 av_extend (av, items - 2);
3497 for (i = 1; i < items; ++i)
3498 av_push (av, SvREFCNT_inc_NN (ST (i)));
3499
3500 if ((SV *)hv == &PL_sv_undef)
3501 {
3502 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3503 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3504 SvREFCNT_dec (sv);
3505 }
3506
3507 {
3508 struct coro *coro = SvSTATE_hv (hv);
3509
3510 assert (!coro->invoke_cb);
3511 assert (!coro->invoke_av);
3512 coro->invoke_cb = SvREFCNT_inc (cb);
3513 coro->invoke_av = av;
3514 }
3515
3516 api_ready (aTHX_ (SV *)hv);
3517
3518 if (GIMME_V != G_VOID)
3519 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3520 else
3521 SvREFCNT_dec (hv);
3522}
1198 3523
1199SV * 3524SV *
1200_get_state () 3525rouse_cb ()
3526 PROTOTYPE:
1201 CODE: 3527 CODE:
1202{ 3528 RETVAL = coro_new_rouse_cb (aTHX);
1203 struct {
1204 int errorno;
1205 int laststype;
1206 int laststatval;
1207 Stat_t statcache;
1208 } data;
1209
1210 data.errorno = errno;
1211 data.laststype = PL_laststype;
1212 data.laststatval = PL_laststatval;
1213 data.statcache = PL_statcache;
1214
1215 RETVAL = newSVpvn ((char *)&data, sizeof data);
1216}
1217 OUTPUT: 3529 OUTPUT:
1218 RETVAL 3530 RETVAL
1219 3531
1220void 3532void
1221_set_state (char *data_) 3533rouse_wait (...)
3534 PROTOTYPE: ;$
3535 PPCODE:
3536 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3537
3538void
3539on_enter (SV *block)
3540 ALIAS:
3541 on_leave = 1
1222 PROTOTYPE: $ 3542 PROTOTYPE: &
1223 CODE: 3543 CODE:
1224{ 3544{
1225 struct { 3545 struct coro *coro = SvSTATE_current;
3546 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3547
3548 block = s_get_cv_croak (block);
3549
3550 if (!*avp)
3551 *avp = newAV ();
3552
3553 av_push (*avp, SvREFCNT_inc (block));
3554
3555 if (!ix)
3556 on_enterleave_call (aTHX_ block);
3557
3558 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3559 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3560 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3561}
3562
3563
3564MODULE = Coro::State PACKAGE = PerlIO::cede
3565
3566BOOT:
3567 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3568
3569
3570MODULE = Coro::State PACKAGE = Coro::Semaphore
3571
3572SV *
3573new (SV *klass, SV *count = 0)
3574 CODE:
3575{
3576 int semcnt = 1;
3577
3578 if (count)
3579 {
3580 SvGETMAGIC (count);
3581
3582 if (SvOK (count))
3583 semcnt = SvIV (count);
3584 }
3585
3586 RETVAL = sv_bless (
3587 coro_waitarray_new (aTHX_ semcnt),
3588 GvSTASH (CvGV (cv))
3589 );
3590}
3591 OUTPUT:
3592 RETVAL
3593
3594# helper for Coro::Channel and others
3595SV *
3596_alloc (int count)
3597 CODE:
3598 RETVAL = coro_waitarray_new (aTHX_ count);
3599 OUTPUT:
3600 RETVAL
3601
3602SV *
3603count (SV *self)
3604 CODE:
3605 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3606 OUTPUT:
3607 RETVAL
3608
3609void
3610up (SV *self, int adjust = 1)
3611 ALIAS:
3612 adjust = 1
3613 CODE:
3614 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3615
3616void
3617down (...)
3618 CODE:
3619 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3620
3621void
3622wait (...)
3623 CODE:
3624 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3625
3626void
3627try (SV *self)
3628 PPCODE:
3629{
3630 AV *av = (AV *)SvRV (self);
3631 SV *count_sv = AvARRAY (av)[0];
3632 IV count = SvIVX (count_sv);
3633
3634 if (count > 0)
3635 {
3636 --count;
3637 SvIVX (count_sv) = count;
3638 XSRETURN_YES;
3639 }
3640 else
3641 XSRETURN_NO;
3642}
3643
3644void
3645waiters (SV *self)
3646 PPCODE:
3647{
3648 AV *av = (AV *)SvRV (self);
3649 int wcount = AvFILLp (av) + 1 - 1;
3650
3651 if (GIMME_V == G_SCALAR)
3652 XPUSHs (sv_2mortal (newSViv (wcount)));
3653 else
3654 {
1226 int errorno; 3655 int i;
1227 int laststype; 3656 EXTEND (SP, wcount);
1228 int laststatval; 3657 for (i = 1; i <= wcount; ++i)
1229 Stat_t statcache; 3658 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1230 } *data = (void *)data_; 3659 }
1231
1232 errno = data->errorno;
1233 PL_laststype = data->laststype;
1234 PL_laststatval = data->laststatval;
1235 PL_statcache = data->statcache;
1236} 3660}
3661
3662MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3663
3664void
3665_may_delete (SV *sem, int count, int extra_refs)
3666 PPCODE:
3667{
3668 AV *av = (AV *)SvRV (sem);
3669
3670 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3671 && AvFILLp (av) == 0 /* no waiters, just count */
3672 && SvIV (AvARRAY (av)[0]) == count)
3673 XSRETURN_YES;
3674
3675 XSRETURN_NO;
3676}
3677
3678MODULE = Coro::State PACKAGE = Coro::Signal
3679
3680SV *
3681new (SV *klass)
3682 CODE:
3683 RETVAL = sv_bless (
3684 coro_waitarray_new (aTHX_ 0),
3685 GvSTASH (CvGV (cv))
3686 );
3687 OUTPUT:
3688 RETVAL
3689
3690void
3691wait (...)
3692 CODE:
3693 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3694
3695void
3696broadcast (SV *self)
3697 CODE:
3698{
3699 AV *av = (AV *)SvRV (self);
3700 coro_signal_wake (aTHX_ av, AvFILLp (av));
3701}
3702
3703void
3704send (SV *self)
3705 CODE:
3706{
3707 AV *av = (AV *)SvRV (self);
3708
3709 if (AvFILLp (av))
3710 coro_signal_wake (aTHX_ av, 1);
3711 else
3712 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3713}
3714
3715IV
3716awaited (SV *self)
3717 CODE:
3718 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3719 OUTPUT:
3720 RETVAL
3721
3722
3723MODULE = Coro::State PACKAGE = Coro::AnyEvent
3724
3725BOOT:
3726 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3727
3728void
3729_schedule (...)
3730 CODE:
3731{
3732 static int incede;
3733
3734 api_cede_notself (aTHX);
3735
3736 ++incede;
3737 while (coro_nready >= incede && api_cede (aTHX))
3738 ;
3739
3740 sv_setsv (sv_activity, &PL_sv_undef);
3741 if (coro_nready >= incede)
3742 {
3743 PUSHMARK (SP);
3744 PUTBACK;
3745 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3746 }
3747
3748 --incede;
3749}
3750
3751
3752MODULE = Coro::State PACKAGE = Coro::AIO
3753
3754void
3755_register (char *target, char *proto, SV *req)
3756 CODE:
3757{
3758 SV *req_cv = s_get_cv_croak (req);
3759 /* newXSproto doesn't return the CV on 5.8 */
3760 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3761 sv_setpv ((SV *)slf_cv, proto);
3762 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3763}
3764
3765MODULE = Coro::State PACKAGE = Coro::Select
3766
3767void
3768patch_pp_sselect ()
3769 CODE:
3770 if (!coro_old_pp_sselect)
3771 {
3772 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3773 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3774 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3775 }
3776
3777void
3778unpatch_pp_sselect ()
3779 CODE:
3780 if (coro_old_pp_sselect)
3781 {
3782 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3783 coro_old_pp_sselect = 0;
3784 }
3785
3786

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