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Comparing Coro/Coro/State.xs (file contents):
Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC vs.
Revision 1.375 by root, Fri Oct 2 19:58:02 2009 UTC

1#define NDEBUG 1
2
3#include "libcoro/coro.c"
4
1#define PERL_NO_GET_CONTEXT 5#define PERL_NO_GET_CONTEXT
2 6#define PERL_EXT
3#include "libcoro/coro.c"
4 7
5#include "EXTERN.h" 8#include "EXTERN.h"
6#include "perl.h" 9#include "perl.h"
7#include "XSUB.h" 10#include "XSUB.h"
11#include "perliol.h"
8 12
9#include "patchlevel.h" 13#include "schmorp.h"
10
11#if PERL_VERSION < 6
12# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr
14# endif
15# ifndef call_sv
16# define call_sv perl_call_sv
17# endif
18# ifndef get_sv
19# define get_sv perl_get_sv
20# endif
21# ifndef get_cv
22# define get_cv perl_get_cv
23# endif
24# ifndef IS_PADGV
25# define IS_PADGV(v) 0
26# endif
27# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0
29# endif
30#endif
31 14
32#include <stdio.h> 15#include <stdio.h>
33#include <errno.h> 16#include <errno.h>
17#include <assert.h>
34 18
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 19#ifndef SVs_PADSTALE
36# undef STACKGUARD 20# define SVs_PADSTALE 0
37#endif 21#endif
38 22
39#ifndef STACKGUARD 23#ifdef WIN32
40# define STACKGUARD 0 24# undef setjmp
25# undef longjmp
26# undef _exit
27# define setjmp _setjmp /* deep magic */
28#else
29# include <inttypes.h> /* most portable stdint.h */
41#endif 30#endif
42 31
43#ifdef HAVE_MMAP 32#ifdef HAVE_MMAP
44# include <unistd.h> 33# include <unistd.h>
45# include <sys/mman.h> 34# include <sys/mman.h>
… …
54# ifndef PAGESIZE 43# ifndef PAGESIZE
55# define PAGESIZE pagesize 44# define PAGESIZE pagesize
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 45# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57static long pagesize; 46static long pagesize;
58# else 47# else
59# define BOOT_PAGESIZE 48# define BOOT_PAGESIZE (void)0
49# endif
50#else
51# define PAGESIZE 0
52# define BOOT_PAGESIZE (void)0
53#endif
54
55#if CORO_USE_VALGRIND
56# include <valgrind/valgrind.h>
57#endif
58
59/* the maximum number of idle cctx that will be pooled */
60static int cctx_max_idle = 4;
61
62#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
63# undef CORO_STACKGUARD
64#endif
65
66#ifndef CORO_STACKGUARD
67# define CORO_STACKGUARD 0
68#endif
69
70/* prefer perl internal functions over our own? */
71#ifndef CORO_PREFER_PERL_FUNCTIONS
72# define CORO_PREFER_PERL_FUNCTIONS 0
73#endif
74
75/* The next macros try to return the current stack pointer, in an as
76 * portable way as possible. */
77#if __GNUC__ >= 4
78# define dSTACKLEVEL int stacklevel_dummy
79# define STACKLEVEL __builtin_frame_address (0)
80#else
81# define dSTACKLEVEL volatile void *stacklevel
82# define STACKLEVEL ((void *)&stacklevel)
83#endif
84
85#define IN_DESTRUCT PL_dirty
86
87#if __GNUC__ >= 3
88# define attribute(x) __attribute__(x)
89# define expect(expr,value) __builtin_expect ((expr), (value))
90# define INLINE static inline
91#else
92# define attribute(x)
93# define expect(expr,value) (expr)
94# define INLINE static
95#endif
96
97#define expect_false(expr) expect ((expr) != 0, 0)
98#define expect_true(expr) expect ((expr) != 0, 1)
99
100#define NOINLINE attribute ((noinline))
101
102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
104
105#ifdef USE_ITHREADS
106# if CORO_PTHREAD
107static void *coro_thx;
60# endif 108# endif
61#endif 109#endif
62 110
63/* The next macro should declare a variable stacklevel that contains and approximation 111#ifdef __linux
64 * to the current C stack pointer. Its property is that it changes with each call 112# include <time.h> /* for timespec */
65 * and should be unique. */ 113# include <syscall.h> /* for SYS_* */
66#define dSTACKLEVEL int stacklevel 114# ifdef SYS_clock_gettime
67#define STACKLEVEL ((void *)&stacklevel) 115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
68 116# define CORO_CLOCK_MONOTONIC 1
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
70 118# endif
71#define labs(l) ((l) >= 0 ? (l) : -(l))
72
73#include "CoroAPI.h"
74
75#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76
77#ifdef USE_ITHREADS
78static perl_mutex coro_mutex;
79# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81#else
82# define LOCK (void)0
83# define UNLOCK (void)0
84#endif 119#endif
85 120
121static double (*nvtime)(); /* so why doesn't it take void? */
122static void (*u2time)(pTHX_ UV ret[2]);
123
124/* we hijack an hopefully unused CV flag for our purposes */
125#define CVf_SLF 0x4000
126static OP *pp_slf (pTHX);
127
128static U32 cctx_gen;
129static size_t cctx_stacksize = CORO_STACKSIZE;
86static struct CoroAPI coroapi; 130static struct CoroAPI coroapi;
87static AV *main_mainstack; /* used to differentiate between $main and others */ 131static AV *main_mainstack; /* used to differentiate between $main and others */
132static JMPENV *main_top_env;
88static HV *coro_state_stash, *coro_stash; 133static HV *coro_state_stash, *coro_stash;
89static SV *coro_mortal; /* will be freed after next transfer */ 134static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
135
136static AV *av_destroy; /* destruction queue */
137static SV *sv_manager; /* the manager coro */
138static SV *sv_idle; /* $Coro::idle */
139
140static GV *irsgv; /* $/ */
141static GV *stdoutgv; /* *STDOUT */
142static SV *rv_diehook;
143static SV *rv_warnhook;
144static HV *hv_sig; /* %SIG */
145
146/* async_pool helper stuff */
147static SV *sv_pool_rss;
148static SV *sv_pool_size;
149static SV *sv_async_pool_idle; /* description string */
150static AV *av_async_pool; /* idle pool */
151static SV *sv_Coro; /* class string */
152static CV *cv_pool_handler;
153
154/* Coro::AnyEvent */
155static SV *sv_activity;
156
157/* enable processtime/realtime profiling */
158static char enable_times;
159typedef U32 coro_ts[2];
160static coro_ts time_real, time_cpu;
161static char times_valid;
162
163static struct coro_cctx *cctx_first;
164static int cctx_count, cctx_idle;
165
166enum {
167 CC_MAPPED = 0x01,
168 CC_NOREUSE = 0x02, /* throw this away after tracing */
169 CC_TRACE = 0x04,
170 CC_TRACE_SUB = 0x08, /* trace sub calls */
171 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173};
90 174
91/* this is a structure representing a c-level coroutine */ 175/* this is a structure representing a c-level coroutine */
92typedef struct coro_stack { 176typedef struct coro_cctx
177{
93 struct coro_stack *next; 178 struct coro_cctx *next;
94 179
95 void *idle_sp; /* original stacklevel when coroutine was created */ 180 /* the stack */
96 void *sptr; 181 void *sptr;
97 long ssize; /* positive == mmap, otherwise malloc */ 182 size_t ssize;
98 183
99 /* cpu state */ 184 /* cpu state */
185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
187 JMPENV *top_env;
100 coro_context cctx; 188 coro_context cctx;
101 JMPENV *top_env;
102} coro_stack;
103 189
104/* the (fake) coro_stack representing the main program */ 190 U32 gen;
105static coro_stack *main_stack; 191#if CORO_USE_VALGRIND
192 int valgrind_id;
193#endif
194 unsigned char flags;
195} coro_cctx;
196
197coro_cctx *cctx_current; /* the currently running cctx */
198
199/*****************************************************************************/
200
201enum {
202 CF_RUNNING = 0x0001, /* coroutine is running */
203 CF_READY = 0x0002, /* coroutine is ready */
204 CF_NEW = 0x0004, /* has never been switched to */
205 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
206 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
207};
208
209/* the structure where most of the perl state is stored, overlaid on the cxstack */
210typedef struct
211{
212 SV *defsv;
213 AV *defav;
214 SV *errsv;
215 SV *irsgv;
216 HV *hinthv;
217#define VAR(name,type) type name;
218# include "state.h"
219#undef VAR
220} perl_slots;
221
222#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
106 223
107/* this is a structure representing a perl-level coroutine */ 224/* this is a structure representing a perl-level coroutine */
108struct coro { 225struct coro {
109 /* the c coroutine allocated to this perl coroutine, if any */ 226 /* the C coroutine allocated to this perl coroutine, if any */
110 coro_stack *stack; 227 coro_cctx *cctx;
111 228
112 /* data associated with this coroutine (initial args) */ 229 /* ready queue */
113 AV *args; 230 struct coro *next_ready;
114 int refcnt;
115 231
116 /* optionally saved, might be zero */ 232 /* state data */
117 AV *defav; 233 struct CoroSLF slf_frame; /* saved slf frame */
118 SV *defsv;
119 SV *errsv;
120
121 /* saved global state not related to stacks */
122 U8 dowarn;
123 I32 in_eval;
124
125 /* the stacks and related info (callchain etc..) */
126 PERL_SI *curstackinfo;
127 AV *curstack;
128 AV *mainstack; 234 AV *mainstack;
129 SV **stack_sp; 235 perl_slots *slot; /* basically the saved sp */
130 OP *op; 236
131 SV **curpad; 237 CV *startcv; /* the CV to execute */
132 AV *comppad; 238 AV *args; /* data associated with this coroutine (initial args) */
133 CV *compcv; 239 int refcnt; /* coroutines are refcounted, yes */
134 SV **stack_base; 240 int flags; /* CF_ flags */
135 SV **stack_max; 241 HV *hv; /* the perl hash associated with this coro, if any */
136 SV **tmps_stack; 242 void (*on_destroy)(pTHX_ struct coro *coro);
137 I32 tmps_floor; 243
138 I32 tmps_ix; 244 /* statistics */
139 I32 tmps_max; 245 int usecount; /* number of transfers to this coro */
140 I32 *markstack;
141 I32 *markstack_ptr;
142 I32 *markstack_max;
143 I32 *scopestack;
144 I32 scopestack_ix;
145 I32 scopestack_max;
146 ANY *savestack;
147 I32 savestack_ix;
148 I32 savestack_max;
149 OP **retstack;
150 I32 retstack_ix;
151 I32 retstack_max;
152 PMOP *curpm;
153 COP *curcop;
154 246
155 /* coro process data */ 247 /* coro process data */
156 int prio; 248 int prio;
249 SV *except; /* exception to be thrown */
250 SV *rouse_cb;
251
252 /* async_pool */
253 SV *saved_deffh;
254 SV *invoke_cb;
255 AV *invoke_av;
256
257 /* on_enter/on_leave */
258 AV *on_enter;
259 AV *on_leave;
260
261 /* swap_sv */
262 AV *swap_sv;
263
264 /* times */
265 coro_ts t_cpu, t_real;
266
267 /* linked list */
268 struct coro *next, *prev;
157}; 269};
158 270
159typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
160typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
161 273
274/* the following variables are effectively part of the perl context */
275/* and get copied between struct coro and these variables */
276/* the mainr easonw e don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */
278
279/** Coro ********************************************************************/
280
281#define CORO_PRIO_MAX 3
282#define CORO_PRIO_HIGH 1
283#define CORO_PRIO_NORMAL 0
284#define CORO_PRIO_LOW -1
285#define CORO_PRIO_IDLE -3
286#define CORO_PRIO_MIN -4
287
288/* for Coro.pm */
289static SV *coro_current;
290static SV *coro_readyhook;
291static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
292static CV *cv_coro_run, *cv_coro_terminate;
293static struct coro *coro_first;
294#define coro_nready coroapi.nready
295
296/** Coro::Select ************************************************************/
297
298static OP *(*coro_old_pp_sselect) (pTHX);
299static SV *coro_select_select;
300
301/* horrible hack, but if it works... */
302static OP *
303coro_pp_sselect (pTHX)
304{
305 dSP;
306 PUSHMARK (SP - 4); /* fake argument list */
307 XPUSHs (coro_select_select);
308 PUTBACK;
309
310 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
311 PL_op->op_flags |= OPf_STACKED;
312 PL_op->op_private = 0;
313 return PL_ppaddr [OP_ENTERSUB](aTHX);
314}
315
316/** lowlevel stuff **********************************************************/
317
318static SV *
319coro_get_sv (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_sv (name, create);
324#endif
325 return get_sv (name, create);
326}
327
162static AV * 328static AV *
329coro_get_av (pTHX_ const char *name, int create)
330{
331#if PERL_VERSION_ATLEAST (5,10,0)
332 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
333 get_av (name, create);
334#endif
335 return get_av (name, create);
336}
337
338static HV *
339coro_get_hv (pTHX_ const char *name, int create)
340{
341#if PERL_VERSION_ATLEAST (5,10,0)
342 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
343 get_hv (name, create);
344#endif
345 return get_hv (name, create);
346}
347
348INLINE void
349coro_times_update ()
350{
351#ifdef coro_clock_gettime
352 struct timespec ts;
353
354 ts.tv_sec = ts.tv_nsec = 0;
355 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
356 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
357
358 ts.tv_sec = ts.tv_nsec = 0;
359 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
360 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
361#else
362 dTHX;
363 UV tv[2];
364
365 u2time (aTHX_ tv);
366 time_real [0] = tv [0];
367 time_real [1] = tv [1] * 1000;
368#endif
369}
370
371INLINE void
372coro_times_add (struct coro *c)
373{
374 c->t_real [1] += time_real [1];
375 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
376 c->t_real [0] += time_real [0];
377
378 c->t_cpu [1] += time_cpu [1];
379 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
380 c->t_cpu [0] += time_cpu [0];
381}
382
383INLINE void
384coro_times_sub (struct coro *c)
385{
386 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
387 c->t_real [1] -= time_real [1];
388 c->t_real [0] -= time_real [0];
389
390 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
391 c->t_cpu [1] -= time_cpu [1];
392 c->t_cpu [0] -= time_cpu [0];
393}
394
395/*****************************************************************************/
396/* magic glue */
397
398#define CORO_MAGIC_type_cv 26
399#define CORO_MAGIC_type_state PERL_MAGIC_ext
400
401#define CORO_MAGIC_NN(sv, type) \
402 (expect_true (SvMAGIC (sv)->mg_type == type) \
403 ? SvMAGIC (sv) \
404 : mg_find (sv, type))
405
406#define CORO_MAGIC(sv, type) \
407 (expect_true (SvMAGIC (sv)) \
408 ? CORO_MAGIC_NN (sv, type) \
409 : 0)
410
411#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
412#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
413
414INLINE struct coro *
415SvSTATE_ (pTHX_ SV *coro)
416{
417 HV *stash;
418 MAGIC *mg;
419
420 if (SvROK (coro))
421 coro = SvRV (coro);
422
423 if (expect_false (SvTYPE (coro) != SVt_PVHV))
424 croak ("Coro::State object required");
425
426 stash = SvSTASH (coro);
427 if (expect_false (stash != coro_stash && stash != coro_state_stash))
428 {
429 /* very slow, but rare, check */
430 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
431 croak ("Coro::State object required");
432 }
433
434 mg = CORO_MAGIC_state (coro);
435 return (struct coro *)mg->mg_ptr;
436}
437
438#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
439
440/* faster than SvSTATE, but expects a coroutine hv */
441#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
442#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
443
444/*****************************************************************************/
445/* padlist management and caching */
446
447static AV *
163coro_clone_padlist (pTHX_ CV *cv) 448coro_derive_padlist (pTHX_ CV *cv)
164{ 449{
165 AV *padlist = CvPADLIST (cv); 450 AV *padlist = CvPADLIST (cv);
166 AV *newpadlist, *newpad; 451 AV *newpadlist, *newpad;
167 452
168 newpadlist = newAV (); 453 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 454 AvREAL_off (newpadlist);
170#if PERL_VERSION < 9 455#if PERL_VERSION_ATLEAST (5,10,0)
456 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
457#else
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 458 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
172#else
173 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
174#endif 459#endif
175 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 460 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176 --AvFILLp (padlist); 461 --AvFILLp (padlist);
177 462
178 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 463 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
179 av_store (newpadlist, 1, (SV *)newpad); 464 av_store (newpadlist, 1, (SV *)newpad);
180 465
181 return newpadlist; 466 return newpadlist;
182} 467}
183 468
184static void 469static void
185free_padlist (pTHX_ AV *padlist) 470free_padlist (pTHX_ AV *padlist)
186{ 471{
187 /* may be during global destruction */ 472 /* may be during global destruction */
188 if (SvREFCNT (padlist)) 473 if (!IN_DESTRUCT)
189 { 474 {
190 I32 i = AvFILLp (padlist); 475 I32 i = AvFILLp (padlist);
191 while (i >= 0) 476
477 while (i > 0) /* special-case index 0 */
192 { 478 {
193 SV **svp = av_fetch (padlist, i--, FALSE); 479 /* we try to be extra-careful here */
194 if (svp) 480 AV *av = (AV *)AvARRAY (padlist)[i--];
195 { 481 I32 j = AvFILLp (av);
196 SV *sv; 482
197 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 483 while (j >= 0)
484 SvREFCNT_dec (AvARRAY (av)[j--]);
485
486 AvFILLp (av) = -1;
198 SvREFCNT_dec (sv); 487 SvREFCNT_dec (av);
199
200 SvREFCNT_dec (*svp);
201 }
202 } 488 }
203 489
490 SvREFCNT_dec (AvARRAY (padlist)[0]);
491
492 AvFILLp (padlist) = -1;
204 SvREFCNT_dec ((SV*)padlist); 493 SvREFCNT_dec ((SV*)padlist);
205 } 494 }
206} 495}
207 496
208static int 497static int
209coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 498coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
210{ 499{
211 AV *padlist; 500 AV *padlist;
212 AV *av = (AV *)mg->mg_obj; 501 AV *av = (AV *)mg->mg_obj;
502
503 /* perl manages to free our internal AV and _then_ call us */
504 if (IN_DESTRUCT)
505 return 0;
213 506
214 /* casting is fun. */ 507 /* casting is fun. */
215 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 508 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216 free_padlist (aTHX_ padlist); 509 free_padlist (aTHX_ padlist);
217 510
218 SvREFCNT_dec (av); 511 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
219 512
220 return 0; 513 return 0;
221} 514}
222 515
223#define PERL_MAGIC_coro PERL_MAGIC_ext 516static MGVTBL coro_cv_vtbl = {
224 517 0, 0, 0, 0,
225static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 518 coro_cv_free
519};
226 520
227/* the next two functions merely cache the padlists */ 521/* the next two functions merely cache the padlists */
228static void 522static void
229get_padlist (pTHX_ CV *cv) 523get_padlist (pTHX_ CV *cv)
230{ 524{
231 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 525 MAGIC *mg = CORO_MAGIC_cv (cv);
526 AV *av;
232 527
233 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 528 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
234 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 529 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235 else 530 else
236 { 531 {
237#if 0 532#if CORO_PREFER_PERL_FUNCTIONS
238 /* this should work - but it doesn't :( */ 533 /* this is probably cleaner? but also slower! */
534 /* in practise, it seems to be less stable */
239 CV *cp = Perl_cv_clone (aTHX_ cv); 535 CV *cp = Perl_cv_clone (aTHX_ cv);
240 CvPADLIST (cv) = CvPADLIST (cp); 536 CvPADLIST (cv) = CvPADLIST (cp);
241 CvPADLIST (cp) = 0; 537 CvPADLIST (cp) = 0;
242 SvREFCNT_dec (cp); 538 SvREFCNT_dec (cp);
243#else 539#else
244 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 540 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
245#endif 541#endif
246 } 542 }
247} 543}
248 544
249static void 545static void
250put_padlist (pTHX_ CV *cv) 546put_padlist (pTHX_ CV *cv)
251{ 547{
252 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 548 MAGIC *mg = CORO_MAGIC_cv (cv);
549 AV *av;
253 550
254 if (!mg) 551 if (expect_false (!mg))
552 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
553
554 av = (AV *)mg->mg_obj;
555
556 if (expect_false (AvFILLp (av) >= AvMAX (av)))
557 av_extend (av, AvFILLp (av) + 1);
558
559 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
560}
561
562/** load & save, init *******************************************************/
563
564/* swap sv heads, at least logically */
565static void
566swap_svs (pTHX_ Coro__State c)
567{
568 int i;
569
570 for (i = 0; i <= AvFILLp (c->swap_sv); )
571 {
572 SV *a = AvARRAY (c->swap_sv)[i++];
573 SV *b = AvARRAY (c->swap_sv)[i++];
574
575 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
576 SV tmp;
577
578 /* swap sv_any */
579 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
580
581 /* swap sv_flags */
582 SvFLAGS (&tmp) = SvFLAGS (a);
583 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
584 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
585
586#if PERL_VERSION_ATLEAST (5,10,0)
587 /* perl 5.10 complicates this _quite_ a bit, but it also is
588 * is much faster, so no quarrels here. alternatively, we could
589 * sv_upgrade to avoid this.
590 */
255 { 591 {
256 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 592 /* swap sv_u */
257 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 593 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
258 mg->mg_virtual = &vtbl_coro; 594
259 mg->mg_obj = (SV *)newAV (); 595 /* if SvANY points to the head, we need to adjust the pointers,
596 * as the pointer for a still points to b, and maybe vice versa.
597 */
598 #define svany_in_head(type) \
599 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
600
601 if (svany_in_head (SvTYPE (a)))
602 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
603
604 if (svany_in_head (SvTYPE (b)))
605 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
260 } 606 }
261 607#endif
262 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 608 }
263} 609}
264 610
265#define SB do { 611#define SWAP_SVS(coro) \
266#define SE } while (0) 612 if (expect_false ((coro)->swap_sv)) \
613 swap_svs (aTHX_ (coro))
267 614
268#define LOAD(state) load_state(aTHX_ (state));
269#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
270
271#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
272
273static void 615static void
616on_enterleave_call (pTHX_ SV *cb);
617
618static void
274load_state(pTHX_ Coro__State c) 619load_perl (pTHX_ Coro__State c)
275{ 620{
276 PL_dowarn = c->dowarn; 621 perl_slots *slot = c->slot;
277 PL_in_eval = c->in_eval; 622 c->slot = 0;
278 623
279 PL_curstackinfo = c->curstackinfo;
280 PL_curstack = c->curstack;
281 PL_mainstack = c->mainstack; 624 PL_mainstack = c->mainstack;
282 PL_stack_sp = c->stack_sp;
283 PL_op = c->op;
284 PL_curpad = c->curpad;
285 PL_comppad = c->comppad;
286 PL_compcv = c->compcv;
287 PL_stack_base = c->stack_base;
288 PL_stack_max = c->stack_max;
289 PL_tmps_stack = c->tmps_stack;
290 PL_tmps_floor = c->tmps_floor;
291 PL_tmps_ix = c->tmps_ix;
292 PL_tmps_max = c->tmps_max;
293 PL_markstack = c->markstack;
294 PL_markstack_ptr = c->markstack_ptr;
295 PL_markstack_max = c->markstack_max;
296 PL_scopestack = c->scopestack;
297 PL_scopestack_ix = c->scopestack_ix;
298 PL_scopestack_max = c->scopestack_max;
299 PL_savestack = c->savestack;
300 PL_savestack_ix = c->savestack_ix;
301 PL_savestack_max = c->savestack_max;
302#if PERL_VERSION < 9
303 PL_retstack = c->retstack;
304 PL_retstack_ix = c->retstack_ix;
305 PL_retstack_max = c->retstack_max;
306#endif
307 PL_curpm = c->curpm;
308 PL_curcop = c->curcop;
309 625
310 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 626 GvSV (PL_defgv) = slot->defsv;
311 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 627 GvAV (PL_defgv) = slot->defav;
312 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 628 GvSV (PL_errgv) = slot->errsv;
629 GvSV (irsgv) = slot->irsgv;
630 GvHV (PL_hintgv) = slot->hinthv;
631
632 #define VAR(name,type) PL_ ## name = slot->name;
633 # include "state.h"
634 #undef VAR
313 635
314 { 636 {
315 dSP; 637 dSP;
638
316 CV *cv; 639 CV *cv;
317 640
318 /* now do the ugly restore mess */ 641 /* now do the ugly restore mess */
319 while ((cv = (CV *)POPs)) 642 while (expect_true (cv = (CV *)POPs))
320 { 643 {
321 AV *padlist = (AV *)POPs;
322
323 if (padlist)
324 {
325 put_padlist (aTHX_ cv); /* mark this padlist as available */ 644 put_padlist (aTHX_ cv); /* mark this padlist as available */
326 CvPADLIST(cv) = padlist; 645 CvDEPTH (cv) = PTR2IV (POPs);
327 } 646 CvPADLIST (cv) = (AV *)POPs;
328
329 ++CvDEPTH(cv);
330 } 647 }
331 648
332 PUTBACK; 649 PUTBACK;
333 } 650 }
334}
335 651
652 slf_frame = c->slf_frame;
653 CORO_THROW = c->except;
654
655 if (expect_false (enable_times))
656 {
657 if (expect_false (!times_valid))
658 coro_times_update ();
659
660 coro_times_sub (c);
661 }
662
663 if (expect_false (c->on_enter))
664 {
665 int i;
666
667 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
668 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
669 }
670
671 SWAP_SVS (c);
672}
673
336static void 674static void
337save_state(pTHX_ Coro__State c, int flags) 675save_perl (pTHX_ Coro__State c)
338{ 676{
677 SWAP_SVS (c);
678
679 if (expect_false (c->on_leave))
680 {
681 int i;
682
683 for (i = AvFILLp (c->on_leave); i >= 0; --i)
684 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
685 }
686
687 times_valid = 0;
688
689 if (expect_false (enable_times))
690 {
691 coro_times_update (); times_valid = 1;
692 coro_times_add (c);
693 }
694
695 c->except = CORO_THROW;
696 c->slf_frame = slf_frame;
697
339 { 698 {
340 dSP; 699 dSP;
341 I32 cxix = cxstack_ix; 700 I32 cxix = cxstack_ix;
342 PERL_CONTEXT *ccstk = cxstack; 701 PERL_CONTEXT *ccstk = cxstack;
343 PERL_SI *top_si = PL_curstackinfo; 702 PERL_SI *top_si = PL_curstackinfo;
… …
345 /* 704 /*
346 * the worst thing you can imagine happens first - we have to save 705 * the worst thing you can imagine happens first - we have to save
347 * (and reinitialize) all cv's in the whole callchain :( 706 * (and reinitialize) all cv's in the whole callchain :(
348 */ 707 */
349 708
350 PUSHs (Nullsv); 709 XPUSHs (Nullsv);
351 /* this loop was inspired by pp_caller */ 710 /* this loop was inspired by pp_caller */
352 for (;;) 711 for (;;)
353 { 712 {
354 while (cxix >= 0) 713 while (expect_true (cxix >= 0))
355 { 714 {
356 PERL_CONTEXT *cx = &ccstk[cxix--]; 715 PERL_CONTEXT *cx = &ccstk[cxix--];
357 716
358 if (CxTYPE(cx) == CXt_SUB) 717 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
359 { 718 {
360 CV *cv = cx->blk_sub.cv; 719 CV *cv = cx->blk_sub.cv;
720
361 if (CvDEPTH(cv)) 721 if (expect_true (CvDEPTH (cv)))
362 { 722 {
363 EXTEND (SP, CvDEPTH(cv)*2);
364
365 while (--CvDEPTH(cv))
366 {
367 /* this tells the restore code to increment CvDEPTH */
368 PUSHs (Nullsv);
369 PUSHs ((SV *)cv);
370 }
371
372 PUSHs ((SV *)CvPADLIST(cv)); 723 PUSHs ((SV *)CvPADLIST (cv));
724 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
373 PUSHs ((SV *)cv); 725 PUSHs ((SV *)cv);
374 726
727 CvDEPTH (cv) = 0;
375 get_padlist (aTHX_ cv); 728 get_padlist (aTHX_ cv);
376 } 729 }
377 } 730 }
378#ifdef CXt_FORMAT
379 else if (CxTYPE(cx) == CXt_FORMAT)
380 {
381 /* I never used formats, so how should I know how these are implemented? */
382 /* my bold guess is as a simple, plain sub... */
383 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
384 }
385#endif
386 } 731 }
387 732
388 if (top_si->si_type == PERLSI_MAIN) 733 if (expect_true (top_si->si_type == PERLSI_MAIN))
389 break; 734 break;
390 735
391 top_si = top_si->si_prev; 736 top_si = top_si->si_prev;
392 ccstk = top_si->si_cxstack; 737 ccstk = top_si->si_cxstack;
393 cxix = top_si->si_cxix; 738 cxix = top_si->si_cxix;
394 } 739 }
395 740
396 PUTBACK; 741 PUTBACK;
397 } 742 }
398 743
399 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 744 /* allocate some space on the context stack for our purposes */
400 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 745 /* we manually unroll here, as usually 2 slots is enough */
401 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 746 if (SLOT_COUNT >= 1) CXINC;
747 if (SLOT_COUNT >= 2) CXINC;
748 if (SLOT_COUNT >= 3) CXINC;
749 {
750 unsigned int i;
751 for (i = 3; i < SLOT_COUNT; ++i)
752 CXINC;
753 }
754 cxstack_ix -= SLOT_COUNT; /* undo allocation */
402 755
403 c->dowarn = PL_dowarn;
404 c->in_eval = PL_in_eval;
405
406 c->curstackinfo = PL_curstackinfo;
407 c->curstack = PL_curstack;
408 c->mainstack = PL_mainstack; 756 c->mainstack = PL_mainstack;
409 c->stack_sp = PL_stack_sp; 757
410 c->op = PL_op; 758 {
411 c->curpad = PL_curpad; 759 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
412 c->comppad = PL_comppad; 760
413 c->compcv = PL_compcv; 761 slot->defav = GvAV (PL_defgv);
414 c->stack_base = PL_stack_base; 762 slot->defsv = DEFSV;
415 c->stack_max = PL_stack_max; 763 slot->errsv = ERRSV;
416 c->tmps_stack = PL_tmps_stack; 764 slot->irsgv = GvSV (irsgv);
417 c->tmps_floor = PL_tmps_floor; 765 slot->hinthv = GvHV (PL_hintgv);
418 c->tmps_ix = PL_tmps_ix; 766
419 c->tmps_max = PL_tmps_max; 767 #define VAR(name,type) slot->name = PL_ ## name;
420 c->markstack = PL_markstack; 768 # include "state.h"
421 c->markstack_ptr = PL_markstack_ptr; 769 #undef VAR
422 c->markstack_max = PL_markstack_max; 770 }
423 c->scopestack = PL_scopestack;
424 c->scopestack_ix = PL_scopestack_ix;
425 c->scopestack_max = PL_scopestack_max;
426 c->savestack = PL_savestack;
427 c->savestack_ix = PL_savestack_ix;
428 c->savestack_max = PL_savestack_max;
429#if PERL_VERSION < 9
430 c->retstack = PL_retstack;
431 c->retstack_ix = PL_retstack_ix;
432 c->retstack_max = PL_retstack_max;
433#endif
434 c->curpm = PL_curpm;
435 c->curcop = PL_curcop;
436} 771}
437 772
438/* 773/*
439 * allocate various perl stacks. This is an exact copy 774 * allocate various perl stacks. This is almost an exact copy
440 * of perl.c:init_stacks, except that it uses less memory 775 * of perl.c:init_stacks, except that it uses less memory
441 * on the (sometimes correct) assumption that coroutines do 776 * on the (sometimes correct) assumption that coroutines do
442 * not usually need a lot of stackspace. 777 * not usually need a lot of stackspace.
443 */ 778 */
779#if CORO_PREFER_PERL_FUNCTIONS
780# define coro_init_stacks(thx) init_stacks ()
781#else
444static void 782static void
445coro_init_stacks (pTHX) 783coro_init_stacks (pTHX)
446{ 784{
447 LOCK; 785 PL_curstackinfo = new_stackinfo(32, 8);
448
449 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
450 PL_curstackinfo->si_type = PERLSI_MAIN; 786 PL_curstackinfo->si_type = PERLSI_MAIN;
451 PL_curstack = PL_curstackinfo->si_stack; 787 PL_curstack = PL_curstackinfo->si_stack;
452 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 788 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453 789
454 PL_stack_base = AvARRAY(PL_curstack); 790 PL_stack_base = AvARRAY(PL_curstack);
455 PL_stack_sp = PL_stack_base; 791 PL_stack_sp = PL_stack_base;
456 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 792 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457 793
458 New(50,PL_tmps_stack,96,SV*); 794 New(50,PL_tmps_stack,32,SV*);
459 PL_tmps_floor = -1; 795 PL_tmps_floor = -1;
460 PL_tmps_ix = -1; 796 PL_tmps_ix = -1;
461 PL_tmps_max = 96; 797 PL_tmps_max = 32;
462 798
463 New(54,PL_markstack,16,I32); 799 New(54,PL_markstack,16,I32);
464 PL_markstack_ptr = PL_markstack; 800 PL_markstack_ptr = PL_markstack;
465 PL_markstack_max = PL_markstack + 16; 801 PL_markstack_max = PL_markstack + 16;
466 802
467#ifdef SET_MARK_OFFSET 803#ifdef SET_MARK_OFFSET
468 SET_MARK_OFFSET; 804 SET_MARK_OFFSET;
469#endif 805#endif
470 806
471 New(54,PL_scopestack,16,I32); 807 New(54,PL_scopestack,8,I32);
472 PL_scopestack_ix = 0; 808 PL_scopestack_ix = 0;
473 PL_scopestack_max = 16; 809 PL_scopestack_max = 8;
474 810
475 New(54,PL_savestack,96,ANY); 811 New(54,PL_savestack,24,ANY);
476 PL_savestack_ix = 0; 812 PL_savestack_ix = 0;
477 PL_savestack_max = 96; 813 PL_savestack_max = 24;
478 814
479#if PERL_VERSION < 9 815#if !PERL_VERSION_ATLEAST (5,10,0)
480 New(54,PL_retstack,8,OP*); 816 New(54,PL_retstack,4,OP*);
481 PL_retstack_ix = 0; 817 PL_retstack_ix = 0;
482 PL_retstack_max = 8; 818 PL_retstack_max = 4;
483#endif 819#endif
484
485 UNLOCK;
486} 820}
821#endif
487 822
488/* 823/*
489 * destroy the stacks, the callchain etc... 824 * destroy the stacks, the callchain etc...
490 */ 825 */
491static void 826static void
492destroy_stacks(pTHX) 827coro_destruct_stacks (pTHX)
493{ 828{
494 if (!IN_DESTRUCT)
495 {
496 /* is this ugly, I ask? */
497 LEAVE_SCOPE (0);
498
499 /* sure it is, but more important: is it correct?? :/ */
500 FREETMPS;
501
502 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
503 }
504
505 while (PL_curstackinfo->si_next) 829 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next; 830 PL_curstackinfo = PL_curstackinfo->si_next;
507 831
508 while (PL_curstackinfo) 832 while (PL_curstackinfo)
509 { 833 {
510 PERL_SI *p = PL_curstackinfo->si_prev; 834 PERL_SI *p = PL_curstackinfo->si_prev;
511 835
512 { /*D*//*remove*/
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (!IN_DESTRUCT) 836 if (!IN_DESTRUCT)
519 {
520 dounwind (-1);/*D*//*remove*/
521 SvREFCNT_dec (PL_curstackinfo->si_stack); 837 SvREFCNT_dec (PL_curstackinfo->si_stack);
522 }
523 838
524 Safefree (PL_curstackinfo->si_cxstack); 839 Safefree (PL_curstackinfo->si_cxstack);
525 Safefree (PL_curstackinfo); 840 Safefree (PL_curstackinfo);
526 PL_curstackinfo = p; 841 PL_curstackinfo = p;
527 } 842 }
528 843
529 Safefree (PL_tmps_stack); 844 Safefree (PL_tmps_stack);
530 Safefree (PL_markstack); 845 Safefree (PL_markstack);
531 Safefree (PL_scopestack); 846 Safefree (PL_scopestack);
532 Safefree (PL_savestack); 847 Safefree (PL_savestack);
533#if PERL_VERSION < 9 848#if !PERL_VERSION_ATLEAST (5,10,0)
534 Safefree (PL_retstack); 849 Safefree (PL_retstack);
535#endif 850#endif
536} 851}
537 852
853#define CORO_RSS \
854 rss += sizeof (SYM (curstackinfo)); \
855 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
856 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
857 rss += SYM (tmps_max) * sizeof (SV *); \
858 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
859 rss += SYM (scopestack_max) * sizeof (I32); \
860 rss += SYM (savestack_max) * sizeof (ANY);
861
862static size_t
863coro_rss (pTHX_ struct coro *coro)
864{
865 size_t rss = sizeof (*coro);
866
867 if (coro->mainstack)
868 {
869 if (coro->flags & CF_RUNNING)
870 {
871 #define SYM(sym) PL_ ## sym
872 CORO_RSS;
873 #undef SYM
874 }
875 else
876 {
877 #define SYM(sym) coro->slot->sym
878 CORO_RSS;
879 #undef SYM
880 }
881 }
882
883 return rss;
884}
885
886/** coroutine stack handling ************************************************/
887
888static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
889static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
890static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
891
892/* apparently < 5.8.8 */
893#ifndef MgPV_nolen_const
894#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
895 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
896 (const char*)(mg)->mg_ptr)
897#endif
898
899/*
900 * This overrides the default magic get method of %SIG elements.
901 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
902 * and instead of trying to save and restore the hash elements, we just provide
903 * readback here.
904 */
538static void 905static int
539setup_coro (struct coro *coro) 906coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
907{
908 const char *s = MgPV_nolen_const (mg);
909
910 if (*s == '_')
911 {
912 SV **svp = 0;
913
914 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
915 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
916
917 if (svp)
918 {
919 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
920 return 0;
921 }
922 }
923
924 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
925}
926
927static int
928coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
929{
930 const char *s = MgPV_nolen_const (mg);
931
932 if (*s == '_')
933 {
934 SV **svp = 0;
935
936 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
937 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
938
939 if (svp)
940 {
941 SV *old = *svp;
942 *svp = 0;
943 SvREFCNT_dec (old);
944 return 0;
945 }
946 }
947
948 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
949}
950
951static int
952coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
953{
954 const char *s = MgPV_nolen_const (mg);
955
956 if (*s == '_')
957 {
958 SV **svp = 0;
959
960 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
961 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
962
963 if (svp)
964 {
965 SV *old = *svp;
966 *svp = SvOK (sv) ? newSVsv (sv) : 0;
967 SvREFCNT_dec (old);
968 return 0;
969 }
970 }
971
972 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
973}
974
975static void
976prepare_nop (pTHX_ struct coro_transfer_args *ta)
977{
978 /* kind of mega-hacky, but works */
979 ta->next = ta->prev = (struct coro *)ta;
980}
981
982static int
983slf_check_nop (pTHX_ struct CoroSLF *frame)
984{
985 return 0;
986}
987
988static int
989slf_check_repeat (pTHX_ struct CoroSLF *frame)
990{
991 return 1;
992}
993
994static UNOP init_perl_op;
995
996static void NOINLINE /* noinline to keep it out of the transfer fast path */
997init_perl (pTHX_ struct coro *coro)
540{ 998{
541 /* 999 /*
542 * emulate part of the perl startup here. 1000 * emulate part of the perl startup here.
543 */ 1001 */
1002 coro_init_stacks (aTHX);
1003
1004 PL_runops = RUNOPS_DEFAULT;
1005 PL_curcop = &PL_compiling;
1006 PL_in_eval = EVAL_NULL;
1007 PL_comppad = 0;
1008 PL_comppad_name = 0;
1009 PL_comppad_name_fill = 0;
1010 PL_comppad_name_floor = 0;
1011 PL_curpm = 0;
1012 PL_curpad = 0;
1013 PL_localizing = 0;
1014 PL_dirty = 0;
1015 PL_restartop = 0;
1016#if PERL_VERSION_ATLEAST (5,10,0)
1017 PL_parser = 0;
1018#endif
1019 PL_hints = 0;
1020
1021 /* recreate the die/warn hooks */
1022 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1023 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1024
1025 GvSV (PL_defgv) = newSV (0);
1026 GvAV (PL_defgv) = coro->args; coro->args = 0;
1027 GvSV (PL_errgv) = newSV (0);
1028 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1029 GvHV (PL_hintgv) = 0;
1030 PL_rs = newSVsv (GvSV (irsgv));
1031 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1032
1033 {
1034 dSP;
1035 UNOP myop;
1036
1037 Zero (&myop, 1, UNOP);
1038 myop.op_next = Nullop;
1039 myop.op_type = OP_ENTERSUB;
1040 myop.op_flags = OPf_WANT_VOID;
1041
1042 PUSHMARK (SP);
1043 PUSHs ((SV *)coro->startcv);
1044 PUTBACK;
1045 PL_op = (OP *)&myop;
1046 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1047 }
1048
1049 /* this newly created coroutine might be run on an existing cctx which most
1050 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1051 */
1052 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1053 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1054
1055 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1056 init_perl_op.op_next = PL_op;
1057 init_perl_op.op_type = OP_ENTERSUB;
1058 init_perl_op.op_ppaddr = pp_slf;
1059 /* no flags etc. required, as an init function won't be called */
1060
1061 PL_op = (OP *)&init_perl_op;
1062
1063 /* copy throw, in case it was set before init_perl */
1064 CORO_THROW = coro->except;
1065
1066 SWAP_SVS (coro);
1067
1068 if (expect_false (enable_times))
1069 {
1070 coro_times_update ();
1071 coro_times_sub (coro);
1072 }
1073}
1074
1075static void
1076coro_unwind_stacks (pTHX)
1077{
1078 if (!IN_DESTRUCT)
1079 {
1080 /* restore all saved variables and stuff */
1081 LEAVE_SCOPE (0);
1082 assert (PL_tmps_floor == -1);
1083
1084 /* free all temporaries */
1085 FREETMPS;
1086 assert (PL_tmps_ix == -1);
1087
1088 /* unwind all extra stacks */
1089 POPSTACK_TO (PL_mainstack);
1090
1091 /* unwind main stack */
1092 dounwind (-1);
1093 }
1094}
1095
1096static void
1097destroy_perl (pTHX_ struct coro *coro)
1098{
1099 SV *svf [9];
1100
1101 {
1102 struct coro *current = SvSTATE_current;
1103
1104 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1105
1106 save_perl (aTHX_ current);
1107 load_perl (aTHX_ coro);
1108
1109 coro_unwind_stacks (aTHX);
1110 coro_destruct_stacks (aTHX);
1111
1112 /* restore swapped sv's */
1113 SWAP_SVS (coro);
1114
1115 // now save some sv's to be free'd later
1116 svf [0] = GvSV (PL_defgv);
1117 svf [1] = (SV *)GvAV (PL_defgv);
1118 svf [2] = GvSV (PL_errgv);
1119 svf [3] = (SV *)PL_defoutgv;
1120 svf [4] = PL_rs;
1121 svf [5] = GvSV (irsgv);
1122 svf [6] = (SV *)GvHV (PL_hintgv);
1123 svf [7] = PL_diehook;
1124 svf [8] = PL_warnhook;
1125 assert (9 == sizeof (svf) / sizeof (*svf));
1126
1127 load_perl (aTHX_ current);
1128 }
1129
1130 {
1131 unsigned int i;
1132
1133 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1134 SvREFCNT_dec (svf [i]);
1135
1136 SvREFCNT_dec (coro->saved_deffh);
1137 SvREFCNT_dec (coro->rouse_cb);
1138 SvREFCNT_dec (coro->invoke_cb);
1139 SvREFCNT_dec (coro->invoke_av);
1140 SvREFCNT_dec (coro->swap_sv);
1141 }
1142}
1143
1144INLINE void
1145free_coro_mortal (pTHX)
1146{
1147 if (expect_true (coro_mortal))
1148 {
1149 SvREFCNT_dec (coro_mortal);
1150 coro_mortal = 0;
1151 }
1152}
1153
1154static int
1155runops_trace (pTHX)
1156{
1157 COP *oldcop = 0;
1158 int oldcxix = -2;
1159
1160 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1161 {
1162 PERL_ASYNC_CHECK ();
1163
1164 if (cctx_current->flags & CC_TRACE_ALL)
1165 {
1166 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1167 {
1168 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1169 SV **bot, **top;
1170 AV *av = newAV (); /* return values */
1171 SV **cb;
1172 dSP;
1173
1174 GV *gv = CvGV (cx->blk_sub.cv);
1175 SV *fullname = sv_2mortal (newSV (0));
1176 if (isGV (gv))
1177 gv_efullname3 (fullname, gv, 0);
1178
1179 bot = PL_stack_base + cx->blk_oldsp + 1;
1180 top = cx->blk_gimme == G_ARRAY ? SP + 1
1181 : cx->blk_gimme == G_SCALAR ? bot + 1
1182 : bot;
1183
1184 av_extend (av, top - bot);
1185 while (bot < top)
1186 av_push (av, SvREFCNT_inc_NN (*bot++));
1187
1188 PL_runops = RUNOPS_DEFAULT;
1189 ENTER;
1190 SAVETMPS;
1191 EXTEND (SP, 3);
1192 PUSHMARK (SP);
1193 PUSHs (&PL_sv_no);
1194 PUSHs (fullname);
1195 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1196 PUTBACK;
1197 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1198 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1199 SPAGAIN;
1200 FREETMPS;
1201 LEAVE;
1202 PL_runops = runops_trace;
1203 }
1204
1205 if (oldcop != PL_curcop)
1206 {
1207 oldcop = PL_curcop;
1208
1209 if (PL_curcop != &PL_compiling)
1210 {
1211 SV **cb;
1212
1213 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1214 {
1215 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1216
1217 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1218 {
1219 dSP;
1220 GV *gv = CvGV (cx->blk_sub.cv);
1221 SV *fullname = sv_2mortal (newSV (0));
1222
1223 if (isGV (gv))
1224 gv_efullname3 (fullname, gv, 0);
1225
1226 PL_runops = RUNOPS_DEFAULT;
1227 ENTER;
1228 SAVETMPS;
1229 EXTEND (SP, 3);
1230 PUSHMARK (SP);
1231 PUSHs (&PL_sv_yes);
1232 PUSHs (fullname);
1233 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1234 PUTBACK;
1235 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1236 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1237 SPAGAIN;
1238 FREETMPS;
1239 LEAVE;
1240 PL_runops = runops_trace;
1241 }
1242
1243 oldcxix = cxstack_ix;
1244 }
1245
1246 if (cctx_current->flags & CC_TRACE_LINE)
1247 {
1248 dSP;
1249
1250 PL_runops = RUNOPS_DEFAULT;
1251 ENTER;
1252 SAVETMPS;
1253 EXTEND (SP, 3);
1254 PL_runops = RUNOPS_DEFAULT;
1255 PUSHMARK (SP);
1256 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1257 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1258 PUTBACK;
1259 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1260 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1261 SPAGAIN;
1262 FREETMPS;
1263 LEAVE;
1264 PL_runops = runops_trace;
1265 }
1266 }
1267 }
1268 }
1269 }
1270
1271 TAINT_NOT;
1272 return 0;
1273}
1274
1275static struct CoroSLF cctx_ssl_frame;
1276
1277static void
1278slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1279{
1280 ta->prev = 0;
1281}
1282
1283static int
1284slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1285{
1286 *frame = cctx_ssl_frame;
1287
1288 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1289}
1290
1291/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1292static void NOINLINE
1293cctx_prepare (pTHX)
1294{
1295 PL_top_env = &PL_start_env;
1296
1297 if (cctx_current->flags & CC_TRACE)
1298 PL_runops = runops_trace;
1299
1300 /* we already must be executing an SLF op, there is no other valid way
1301 * that can lead to creation of a new cctx */
1302 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1303 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1304
1305 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1306 cctx_ssl_frame = slf_frame;
1307
1308 slf_frame.prepare = slf_prepare_set_stacklevel;
1309 slf_frame.check = slf_check_set_stacklevel;
1310}
1311
1312/* the tail of transfer: execute stuff we can only do after a transfer */
1313INLINE void
1314transfer_tail (pTHX)
1315{
1316 free_coro_mortal (aTHX);
1317}
1318
1319/*
1320 * this is a _very_ stripped down perl interpreter ;)
1321 */
1322static void
1323cctx_run (void *arg)
1324{
1325#ifdef USE_ITHREADS
1326# if CORO_PTHREAD
1327 PERL_SET_CONTEXT (coro_thx);
1328# endif
1329#endif
1330 {
1331 dTHX;
1332
1333 /* normally we would need to skip the entersub here */
1334 /* not doing so will re-execute it, which is exactly what we want */
1335 /* PL_nop = PL_nop->op_next */
1336
1337 /* inject a fake subroutine call to cctx_init */
1338 cctx_prepare (aTHX);
1339
1340 /* cctx_run is the alternative tail of transfer() */
1341 transfer_tail (aTHX);
1342
1343 /* somebody or something will hit me for both perl_run and PL_restartop */
1344 PL_restartop = PL_op;
1345 perl_run (PL_curinterp);
1346 /*
1347 * Unfortunately, there is no way to get at the return values of the
1348 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1349 * runtime errors here, as this is just a random interpreter, not a thread.
1350 */
1351
1352 /*
1353 * If perl-run returns we assume exit() was being called or the coro
1354 * fell off the end, which seems to be the only valid (non-bug)
1355 * reason for perl_run to return. We try to exit by jumping to the
1356 * bootstrap-time "top" top_env, as we cannot restore the "main"
1357 * coroutine as Coro has no such concept.
1358 * This actually isn't valid with the pthread backend, but OSes requiring
1359 * that backend are too broken to do it in a standards-compliant way.
1360 */
1361 PL_top_env = main_top_env;
1362 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1363 }
1364}
1365
1366static coro_cctx *
1367cctx_new ()
1368{
1369 coro_cctx *cctx;
1370
1371 ++cctx_count;
1372 New (0, cctx, 1, coro_cctx);
1373
1374 cctx->gen = cctx_gen;
1375 cctx->flags = 0;
1376 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1377
1378 return cctx;
1379}
1380
1381/* create a new cctx only suitable as source */
1382static coro_cctx *
1383cctx_new_empty ()
1384{
1385 coro_cctx *cctx = cctx_new ();
1386
1387 cctx->sptr = 0;
1388 coro_create (&cctx->cctx, 0, 0, 0, 0);
1389
1390 return cctx;
1391}
1392
1393/* create a new cctx suitable as destination/running a perl interpreter */
1394static coro_cctx *
1395cctx_new_run ()
1396{
1397 coro_cctx *cctx = cctx_new ();
1398 void *stack_start;
1399 size_t stack_size;
1400
1401#if HAVE_MMAP
1402 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1403 /* mmap supposedly does allocate-on-write for us */
1404 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1405
1406 if (cctx->sptr != (void *)-1)
1407 {
1408 #if CORO_STACKGUARD
1409 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1410 #endif
1411 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1412 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1413 cctx->flags |= CC_MAPPED;
1414 }
1415 else
1416#endif
1417 {
1418 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1419 New (0, cctx->sptr, cctx_stacksize, long);
1420
1421 if (!cctx->sptr)
1422 {
1423 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1424 _exit (EXIT_FAILURE);
1425 }
1426
1427 stack_start = cctx->sptr;
1428 stack_size = cctx->ssize;
1429 }
1430
1431 #if CORO_USE_VALGRIND
1432 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1433 #endif
1434
1435 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1436
1437 return cctx;
1438}
1439
1440static void
1441cctx_destroy (coro_cctx *cctx)
1442{
1443 if (!cctx)
1444 return;
1445
1446 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1447
1448 --cctx_count;
1449 coro_destroy (&cctx->cctx);
1450
1451 /* coro_transfer creates new, empty cctx's */
1452 if (cctx->sptr)
1453 {
1454 #if CORO_USE_VALGRIND
1455 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1456 #endif
1457
1458#if HAVE_MMAP
1459 if (cctx->flags & CC_MAPPED)
1460 munmap (cctx->sptr, cctx->ssize);
1461 else
1462#endif
1463 Safefree (cctx->sptr);
1464 }
1465
1466 Safefree (cctx);
1467}
1468
1469/* wether this cctx should be destructed */
1470#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1471
1472static coro_cctx *
1473cctx_get (pTHX)
1474{
1475 while (expect_true (cctx_first))
1476 {
1477 coro_cctx *cctx = cctx_first;
1478 cctx_first = cctx->next;
1479 --cctx_idle;
1480
1481 if (expect_true (!CCTX_EXPIRED (cctx)))
1482 return cctx;
1483
1484 cctx_destroy (cctx);
1485 }
1486
1487 return cctx_new_run ();
1488}
1489
1490static void
1491cctx_put (coro_cctx *cctx)
1492{
1493 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1494
1495 /* free another cctx if overlimit */
1496 if (expect_false (cctx_idle >= cctx_max_idle))
1497 {
1498 coro_cctx *first = cctx_first;
1499 cctx_first = first->next;
1500 --cctx_idle;
1501
1502 cctx_destroy (first);
1503 }
1504
1505 ++cctx_idle;
1506 cctx->next = cctx_first;
1507 cctx_first = cctx;
1508}
1509
1510/** coroutine switching *****************************************************/
1511
1512static void
1513transfer_check (pTHX_ struct coro *prev, struct coro *next)
1514{
1515 /* TODO: throwing up here is considered harmful */
1516
1517 if (expect_true (prev != next))
1518 {
1519 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1520 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1521
1522 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1523 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1524
1525#if !PERL_VERSION_ATLEAST (5,10,0)
1526 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1527 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1528#endif
1529 }
1530}
1531
1532/* always use the TRANSFER macro */
1533static void NOINLINE /* noinline so we have a fixed stackframe */
1534transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1535{
1536 dSTACKLEVEL;
1537
1538 /* sometimes transfer is only called to set idle_sp */
1539 if (expect_false (!prev))
1540 {
1541 cctx_current->idle_sp = STACKLEVEL;
1542 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1543 }
1544 else if (expect_true (prev != next))
1545 {
1546 coro_cctx *cctx_prev;
1547
1548 if (expect_false (prev->flags & CF_NEW))
1549 {
1550 /* create a new empty/source context */
1551 prev->flags &= ~CF_NEW;
1552 prev->flags |= CF_RUNNING;
1553 }
1554
1555 prev->flags &= ~CF_RUNNING;
1556 next->flags |= CF_RUNNING;
1557
1558 /* first get rid of the old state */
1559 save_perl (aTHX_ prev);
1560
1561 if (expect_false (next->flags & CF_NEW))
1562 {
1563 /* need to start coroutine */
1564 next->flags &= ~CF_NEW;
1565 /* setup coroutine call */
1566 init_perl (aTHX_ next);
1567 }
1568 else
1569 load_perl (aTHX_ next);
1570
1571 /* possibly untie and reuse the cctx */
1572 if (expect_true (
1573 cctx_current->idle_sp == STACKLEVEL
1574 && !(cctx_current->flags & CC_TRACE)
1575 && !force_cctx
1576 ))
1577 {
1578 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1579 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1580
1581 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1582 /* without this the next cctx_get might destroy the running cctx while still in use */
1583 if (expect_false (CCTX_EXPIRED (cctx_current)))
1584 if (expect_true (!next->cctx))
1585 next->cctx = cctx_get (aTHX);
1586
1587 cctx_put (cctx_current);
1588 }
1589 else
1590 prev->cctx = cctx_current;
1591
1592 ++next->usecount;
1593
1594 cctx_prev = cctx_current;
1595 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1596
1597 next->cctx = 0;
1598
1599 if (expect_false (cctx_prev != cctx_current))
1600 {
1601 cctx_prev->top_env = PL_top_env;
1602 PL_top_env = cctx_current->top_env;
1603 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1604 }
1605
1606 transfer_tail (aTHX);
1607 }
1608}
1609
1610#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1611#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1612
1613/** high level stuff ********************************************************/
1614
1615static int
1616coro_state_destroy (pTHX_ struct coro *coro)
1617{
1618 if (coro->flags & CF_DESTROYED)
1619 return 0;
1620
1621 if (coro->on_destroy && !PL_dirty)
1622 coro->on_destroy (aTHX_ coro);
1623
1624 coro->flags |= CF_DESTROYED;
1625
1626 if (coro->flags & CF_READY)
1627 {
1628 /* reduce nready, as destroying a ready coro effectively unreadies it */
1629 /* alternative: look through all ready queues and remove the coro */
1630 --coro_nready;
1631 }
1632 else
1633 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1634
1635 if (coro->mainstack
1636 && coro->mainstack != main_mainstack
1637 && coro->slot
1638 && !PL_dirty)
1639 destroy_perl (aTHX_ coro);
1640
1641 cctx_destroy (coro->cctx);
1642 SvREFCNT_dec (coro->startcv);
1643 SvREFCNT_dec (coro->args);
1644 SvREFCNT_dec (CORO_THROW);
1645
1646 if (coro->next) coro->next->prev = coro->prev;
1647 if (coro->prev) coro->prev->next = coro->next;
1648 if (coro == coro_first) coro_first = coro->next;
1649
1650 return 1;
1651}
1652
1653static int
1654coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1655{
1656 struct coro *coro = (struct coro *)mg->mg_ptr;
1657 mg->mg_ptr = 0;
1658
1659 coro->hv = 0;
1660
1661 if (--coro->refcnt < 0)
1662 {
1663 coro_state_destroy (aTHX_ coro);
1664 Safefree (coro);
1665 }
1666
1667 return 0;
1668}
1669
1670static int
1671coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1672{
1673 struct coro *coro = (struct coro *)mg->mg_ptr;
1674
1675 ++coro->refcnt;
1676
1677 return 0;
1678}
1679
1680static MGVTBL coro_state_vtbl = {
1681 0, 0, 0, 0,
1682 coro_state_free,
1683 0,
1684#ifdef MGf_DUP
1685 coro_state_dup,
1686#else
1687# define MGf_DUP 0
1688#endif
1689};
1690
1691static void
1692prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1693{
1694 ta->prev = SvSTATE (prev_sv);
1695 ta->next = SvSTATE (next_sv);
1696 TRANSFER_CHECK (*ta);
1697}
1698
1699static void
1700api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1701{
1702 struct coro_transfer_args ta;
1703
1704 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1705 TRANSFER (ta, 1);
1706}
1707
1708/** Coro ********************************************************************/
1709
1710INLINE void
1711coro_enq (pTHX_ struct coro *coro)
1712{
1713 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1714
1715 SvREFCNT_inc_NN (coro->hv);
1716
1717 coro->next_ready = 0;
1718 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1719 ready [1] = coro;
1720}
1721
1722INLINE struct coro *
1723coro_deq (pTHX)
1724{
1725 int prio;
1726
1727 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1728 {
1729 struct coro **ready = coro_ready [prio];
1730
1731 if (ready [0])
1732 {
1733 struct coro *coro = ready [0];
1734 ready [0] = coro->next_ready;
1735 return coro;
1736 }
1737 }
1738
1739 return 0;
1740}
1741
1742static void
1743invoke_sv_ready_hook_helper (void)
1744{
544 dTHX; 1745 dTHX;
545 dSP; 1746 dSP;
546 UNOP myop;
547 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
548 1747
549 coro_init_stacks (aTHX); 1748 ENTER;
550 /*PL_curcop = 0;*/ 1749 SAVETMPS;
551 /*PL_in_eval = PL_in_eval;*/ /* inherit */
552 SvREFCNT_dec (GvAV (PL_defgv));
553 GvAV (PL_defgv) = coro->args; coro->args = 0;
554 1750
555 SPAGAIN;
556
557 Zero (&myop, 1, UNOP);
558 myop.op_next = Nullop;
559 myop.op_flags = OPf_WANT_VOID;
560
561 PL_op = (OP *)&myop;
562
563 PUSHMARK(SP); 1751 PUSHMARK (SP);
564 XPUSHs (sub_init);
565 PUTBACK; 1752 PUTBACK;
566 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1753 call_sv (coro_readyhook, G_VOID | G_DISCARD);
567 SPAGAIN;
568 1754
569 ENTER; /* necessary e.g. for dounwind */ 1755 FREETMPS;
1756 LEAVE;
570} 1757}
571 1758
572static void 1759static int
573free_coro_mortal () 1760api_ready (pTHX_ SV *coro_sv)
574{ 1761{
575 if (coro_mortal) 1762 struct coro *coro = SvSTATE (coro_sv);
576 {
577 SvREFCNT_dec (coro_mortal);
578 coro_mortal = 0;
579 }
580}
581 1763
582static void 1764 if (coro->flags & CF_READY)
583coro_run (void *arg)
584{
585 /*
586 * this is a _very_ stripped down perl interpreter ;)
587 */
588 dTHX;
589 PL_top_env = &PL_start_env;
590
591 UNLOCK;
592
593 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
594 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
595 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596
597 /* somebody will hit me for both perl_run and PL_restart_op */
598 perl_run (aTHX_ PERL_GET_CONTEXT);
599
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; /* mmap should do allocate-on-write for us */
613 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
614
615 if (stack->sptr == (void *)-1)
616 {
617 perror ("FATAL: unable to mmap stack for coroutine");
618 _exit (EXIT_FAILURE);
619 }
620
621 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
622
623#else
624
625 stack->ssize = STACKSIZE * (long)sizeof (long);
626 New (0, stack->sptr, STACKSIZE, long);
627
628 if (!stack->sptr)
629 {
630 perror (stderr, "FATAL: unable to malloc stack for coroutine");
631 _exit (EXIT_FAILURE);
632 }
633
634#endif
635
636 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
637
638 return stack;
639}
640
641static void
642stack_free (coro_stack *stack)
643{
644 if (!stack || stack == main_stack)
645 return; 1765 return 0;
646 1766
647#if HAVE_MMAP 1767 coro->flags |= CF_READY;
648 munmap (stack->sptr, stack->ssize);
649#else
650 Safefree (stack->sptr);
651#endif
652 1768
653 Safefree (stack); 1769 coro_enq (aTHX_ coro);
654}
655 1770
656static coro_stack *stack_first; 1771 if (!coro_nready++)
1772 if (coroapi.readyhook)
1773 coroapi.readyhook ();
657 1774
658static coro_stack * 1775 return 1;
659stack_get () 1776}
660{
661 coro_stack *stack;
662 1777
663 if (stack_first) 1778static int
664 { 1779api_is_ready (pTHX_ SV *coro_sv)
665 stack = stack_first; 1780{
666 stack_first = stack->next; 1781 return !!(SvSTATE (coro_sv)->flags & CF_READY);
667 } 1782}
668 else 1783
1784/* expects to own a reference to next->hv */
1785INLINE void
1786prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1787{
1788 SV *prev_sv = SvRV (coro_current);
1789
1790 ta->prev = SvSTATE_hv (prev_sv);
1791 ta->next = next;
1792
1793 TRANSFER_CHECK (*ta);
1794
1795 SvRV_set (coro_current, (SV *)next->hv);
1796
1797 free_coro_mortal (aTHX);
1798 coro_mortal = prev_sv;
1799}
1800
1801static void
1802prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1803{
1804 for (;;)
669 { 1805 {
670 stack = stack_new (); 1806 struct coro *next = coro_deq (aTHX);
671 PL_op = PL_op->op_next;
672 }
673 1807
674 return stack; 1808 if (expect_true (next))
675}
676
677static void
678stack_put (coro_stack *stack)
679{
680 stack->next = stack_first;
681 stack_first = stack;
682}
683
684/* never call directly, always through the coro_state_transfer global variable */
685static void
686transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
687{
688 dSTACKLEVEL;
689
690 /* sometimes transfer is only called to set idle_sp */
691 if (flags == TRANSFER_SET_STACKLEVEL)
692 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
693 else if (prev != next)
694 {
695 coro_stack *prev__stack;
696
697 LOCK;
698
699 if (next->mainstack)
700 { 1809 {
701 /* coroutine already started */ 1810 /* cannot transfer to destroyed coros, skip and look for next */
702 SAVE (prev, flags); 1811 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
703 LOAD (next); 1812 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1813 else
1814 {
1815 next->flags &= ~CF_READY;
1816 --coro_nready;
1817
1818 prepare_schedule_to (aTHX_ ta, next);
1819 break;
1820 }
704 } 1821 }
705 else 1822 else
706 { 1823 {
707 /* need to start coroutine */ 1824 /* nothing to schedule: call the idle handler */
708 /* first get rid of the old state */ 1825 if (SvROK (sv_idle)
709 SAVE (prev, -1); 1826 && SvOBJECT (SvRV (sv_idle)))
710 /* setup coroutine call */ 1827 {
711 setup_coro (next); 1828 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
712 /* need a stack */ 1829 api_ready (aTHX_ SvRV (sv_idle));
713 next->stack = 0; 1830 --coro_nready;
1831 }
1832 else
1833 {
1834 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1835 dSP;
1836
1837 ENTER;
1838 SAVETMPS;
1839
1840 PUSHMARK (SP);
1841 PUTBACK;
1842 call_sv (sv_idle, G_VOID | G_DISCARD);
1843
1844 FREETMPS;
1845 LEAVE;
1846 }
714 } 1847 }
1848 }
1849}
715 1850
716 prev__stack = prev->stack; 1851INLINE void
1852prepare_cede (pTHX_ struct coro_transfer_args *ta)
1853{
1854 api_ready (aTHX_ coro_current);
1855 prepare_schedule (aTHX_ ta);
1856}
717 1857
718 /* possibly "free" the stack */ 1858INLINE void
719 if (prev__stack->idle_sp == STACKLEVEL) 1859prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1860{
1861 SV *prev = SvRV (coro_current);
1862
1863 if (coro_nready)
1864 {
1865 prepare_schedule (aTHX_ ta);
1866 api_ready (aTHX_ prev);
1867 }
1868 else
1869 prepare_nop (aTHX_ ta);
1870}
1871
1872static void
1873api_schedule (pTHX)
1874{
1875 struct coro_transfer_args ta;
1876
1877 prepare_schedule (aTHX_ &ta);
1878 TRANSFER (ta, 1);
1879}
1880
1881static void
1882api_schedule_to (pTHX_ SV *coro_sv)
1883{
1884 struct coro_transfer_args ta;
1885 struct coro *next = SvSTATE (coro_sv);
1886
1887 SvREFCNT_inc_NN (coro_sv);
1888 prepare_schedule_to (aTHX_ &ta, next);
1889}
1890
1891static int
1892api_cede (pTHX)
1893{
1894 struct coro_transfer_args ta;
1895
1896 prepare_cede (aTHX_ &ta);
1897
1898 if (expect_true (ta.prev != ta.next))
1899 {
1900 TRANSFER (ta, 1);
1901 return 1;
1902 }
1903 else
1904 return 0;
1905}
1906
1907static int
1908api_cede_notself (pTHX)
1909{
1910 if (coro_nready)
1911 {
1912 struct coro_transfer_args ta;
1913
1914 prepare_cede_notself (aTHX_ &ta);
1915 TRANSFER (ta, 1);
1916 return 1;
1917 }
1918 else
1919 return 0;
1920}
1921
1922static void
1923api_trace (pTHX_ SV *coro_sv, int flags)
1924{
1925 struct coro *coro = SvSTATE (coro_sv);
1926
1927 if (coro->flags & CF_RUNNING)
1928 croak ("cannot enable tracing on a running coroutine, caught");
1929
1930 if (flags & CC_TRACE)
1931 {
1932 if (!coro->cctx)
1933 coro->cctx = cctx_new_run ();
1934 else if (!(coro->cctx->flags & CC_TRACE))
1935 croak ("cannot enable tracing on coroutine with custom stack, caught");
1936
1937 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1938 }
1939 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1940 {
1941 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1942
1943 if (coro->flags & CF_RUNNING)
1944 PL_runops = RUNOPS_DEFAULT;
1945 else
1946 coro->slot->runops = RUNOPS_DEFAULT;
1947 }
1948}
1949
1950static void
1951coro_call_on_destroy (pTHX_ struct coro *coro)
1952{
1953 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1954 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1955
1956 if (on_destroyp)
1957 {
1958 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1959
1960 while (AvFILLp (on_destroy) >= 0)
720 { 1961 {
721 stack_put (prev__stack); 1962 dSP; /* don't disturb outer sp */
722 prev->stack = 0; 1963 SV *cb = av_pop (on_destroy);
1964
1965 PUSHMARK (SP);
1966
1967 if (statusp)
1968 {
1969 int i;
1970 AV *status = (AV *)SvRV (*statusp);
1971 EXTEND (SP, AvFILLp (status) + 1);
1972
1973 for (i = 0; i <= AvFILLp (status); ++i)
1974 PUSHs (AvARRAY (status)[i]);
1975 }
1976
1977 PUTBACK;
1978 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
723 } 1979 }
724
725 if (!next->stack)
726 next->stack = stack_get ();
727
728 if (prev__stack != next->stack)
729 {
730 prev__stack->top_env = PL_top_env;
731 PL_top_env = next->stack->top_env;
732 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
733 }
734
735 free_coro_mortal ();
736
737 UNLOCK;
738 }
739}
740
741/* use this function pointer to call the above function */
742/* this is done to increase chances of the compiler not inlining the call */
743/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
744void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
745
746struct transfer_args
747{
748 struct coro *prev, *next;
749 int flags;
750};
751
752#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
753
754static void
755coro_state_destroy (struct coro *coro)
756{
757 if (coro->refcnt--)
758 return;
759
760 if (coro->mainstack && coro->mainstack != main_mainstack)
761 { 1980 }
762 struct coro temp; 1981}
763 1982
764 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1983static void
765 LOAD (aTHX_ coro); 1984slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1985{
1986 int i;
1987 HV *hv = (HV *)SvRV (coro_current);
1988 AV *av = newAV ();
766 1989
767 destroy_stacks (aTHX); 1990 /* items are actually not so common, so optimise for this case */
768 1991 if (items)
769 LOAD ((&temp)); /* this will get rid of defsv etc.. */
770
771 coro->mainstack = 0;
772 } 1992 {
1993 av_extend (av, items - 1);
773 1994
774 stack_free (coro->stack); 1995 for (i = 0; i < items; ++i)
775 SvREFCNT_dec (coro->args); 1996 av_push (av, SvREFCNT_inc_NN (arg [i]));
776 Safefree (coro); 1997 }
1998
1999 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2000
2001 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2002 api_ready (aTHX_ sv_manager);
2003
2004 frame->prepare = prepare_schedule;
2005 frame->check = slf_check_repeat;
2006
2007 /* as a minor optimisation, we could unwind all stacks here */
2008 /* but that puts extra pressure on pp_slf, and is not worth much */
2009 /*coro_unwind_stacks (aTHX);*/
777} 2010}
2011
2012/*****************************************************************************/
2013/* async pool handler */
778 2014
779static int 2015static int
780coro_state_clear (SV *sv, MAGIC *mg) 2016slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
781{ 2017{
2018 HV *hv = (HV *)SvRV (coro_current);
782 struct coro *coro = (struct coro *)mg->mg_ptr; 2019 struct coro *coro = (struct coro *)frame->data;
783 mg->mg_ptr = 0;
784 2020
785 coro_state_destroy (coro); 2021 if (!coro->invoke_cb)
786 2022 return 1; /* loop till we have invoke */
787 return 0; 2023 else
788}
789
790static int
791coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)
792{
793 struct coro *coro = (struct coro *)mg->mg_ptr;
794
795 ++coro->refcnt;
796
797 return 0;
798}
799
800static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
801
802static struct coro *
803SvSTATE (SV *coro)
804{
805 HV *stash;
806 MAGIC *mg;
807
808 if (SvROK (coro))
809 coro = SvRV (coro);
810
811 stash = SvSTASH (coro);
812 if (stash != coro_stash && stash != coro_state_stash)
813 {
814 /* very slow, but rare, check */
815 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
816 croak ("Coro::State object required");
817 }
818
819 mg = SvMAGIC (coro);
820 assert (mg->mg_type == PERL_MAGIC_ext);
821 return (struct coro *)mg->mg_ptr;
822}
823
824static void
825prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
826{
827 ta->prev = SvSTATE (prev);
828 ta->next = SvSTATE (next);
829 ta->flags = flags;
830}
831
832static void
833api_transfer (SV *prev, SV *next, int flags)
834{
835 dTHX;
836 struct transfer_args ta;
837
838 prepare_transfer (aTHX_ &ta, prev, next, flags);
839 TRANSFER (ta);
840}
841
842/** Coro ********************************************************************/
843
844#define PRIO_MAX 3
845#define PRIO_HIGH 1
846#define PRIO_NORMAL 0
847#define PRIO_LOW -1
848#define PRIO_IDLE -3
849#define PRIO_MIN -4
850
851/* for Coro.pm */
852static GV *coro_current, *coro_idle;
853static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
854static int coro_nready;
855
856static void
857coro_enq (pTHX_ SV *sv)
858{
859 int prio;
860
861 if (SvTYPE (sv) != SVt_PVHV)
862 croak ("Coro::ready tried to enqueue something that is not a coroutine");
863
864 prio = SvSTATE (sv)->prio;
865
866 av_push (coro_ready [prio - PRIO_MIN], sv);
867 coro_nready++;
868}
869
870static SV *
871coro_deq (pTHX_ int min_prio)
872{
873 int prio = PRIO_MAX - PRIO_MIN;
874
875 min_prio -= PRIO_MIN;
876 if (min_prio < 0)
877 min_prio = 0;
878
879 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
880 if (AvFILLp (coro_ready [prio]) >= 0)
881 { 2024 {
882 coro_nready--; 2025 hv_store (hv, "desc", sizeof ("desc") - 1,
883 return av_shift (coro_ready [prio]); 2026 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
884 }
885 2027
886 return 0; 2028 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
887}
888
889static void
890api_ready (SV *coro)
891{
892 dTHX;
893
894 if (SvROK (coro))
895 coro = SvRV (coro);
896
897 LOCK;
898 coro_enq (aTHX_ SvREFCNT_inc (coro));
899 UNLOCK;
900}
901
902static void
903prepare_schedule (aTHX_ struct transfer_args *ta)
904{
905 SV *current, *prev, *next;
906
907 LOCK;
908
909 current = GvSV (coro_current);
910
911 for (;;)
912 {
913 LOCK;
914
915 next = coro_deq (aTHX_ PRIO_MIN);
916
917 if (next)
918 break;
919
920 UNLOCK;
921 2029
922 { 2030 {
923 dSP; 2031 dSP;
924 2032 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
925 ENTER;
926 SAVETMPS;
927
928 PUSHMARK (SP);
929 PUTBACK; 2033 PUTBACK;
930 call_sv (GvSV (coro_idle), G_DISCARD);
931
932 FREETMPS;
933 LEAVE;
934 } 2034 }
2035
2036 SvREFCNT_dec (GvAV (PL_defgv));
2037 GvAV (PL_defgv) = coro->invoke_av;
2038 coro->invoke_av = 0;
2039
2040 return 0;
2041 }
2042}
2043
2044static void
2045slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2046{
2047 HV *hv = (HV *)SvRV (coro_current);
2048 struct coro *coro = SvSTATE_hv ((SV *)hv);
2049
2050 if (expect_true (coro->saved_deffh))
935 } 2051 {
2052 /* subsequent iteration */
2053 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2054 coro->saved_deffh = 0;
936 2055
937 prev = SvRV (current); 2056 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
938 SvRV (current) = next; 2057 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2058 {
2059 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2060 coro->invoke_av = newAV ();
939 2061
940 /* free this only after the transfer */ 2062 frame->prepare = prepare_nop;
941 free_coro_mortal (); 2063 }
942 coro_mortal = prev; 2064 else
2065 {
2066 av_clear (GvAV (PL_defgv));
2067 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
943 2068
944 ta->prev = SvSTATE (prev); 2069 coro->prio = 0;
945 ta->next = SvSTATE (next);
946 ta->flags = TRANSFER_SAVE_ALL;
947 2070
948 UNLOCK; 2071 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
949} 2072 api_trace (aTHX_ coro_current, 0);
950 2073
2074 frame->prepare = prepare_schedule;
2075 av_push (av_async_pool, SvREFCNT_inc (hv));
2076 }
2077 }
2078 else
2079 {
2080 /* first iteration, simply fall through */
2081 frame->prepare = prepare_nop;
2082 }
2083
2084 frame->check = slf_check_pool_handler;
2085 frame->data = (void *)coro;
2086}
2087
2088/*****************************************************************************/
2089/* rouse callback */
2090
2091#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2092
2093static void
2094coro_rouse_callback (pTHX_ CV *cv)
2095{
2096 dXSARGS;
2097 SV *data = (SV *)S_GENSUB_ARG;
2098
2099 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2100 {
2101 /* first call, set args */
2102 SV *coro = SvRV (data);
2103 AV *av = newAV ();
2104
2105 SvRV_set (data, (SV *)av);
2106
2107 /* better take a full copy of the arguments */
2108 while (items--)
2109 av_store (av, items, newSVsv (ST (items)));
2110
2111 api_ready (aTHX_ coro);
2112 SvREFCNT_dec (coro);
2113 }
2114
2115 XSRETURN_EMPTY;
2116}
2117
951static void 2118static int
2119slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2120{
2121 SV *data = (SV *)frame->data;
2122
2123 if (CORO_THROW)
2124 return 0;
2125
2126 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2127 return 1;
2128
2129 /* now push all results on the stack */
2130 {
2131 dSP;
2132 AV *av = (AV *)SvRV (data);
2133 int i;
2134
2135 EXTEND (SP, AvFILLp (av) + 1);
2136 for (i = 0; i <= AvFILLp (av); ++i)
2137 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2138
2139 /* we have stolen the elements, so set length to zero and free */
2140 AvFILLp (av) = -1;
2141 av_undef (av);
2142
2143 PUTBACK;
2144 }
2145
2146 return 0;
2147}
2148
2149static void
2150slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2151{
2152 SV *cb;
2153
2154 if (items)
2155 cb = arg [0];
2156 else
2157 {
2158 struct coro *coro = SvSTATE_current;
2159
2160 if (!coro->rouse_cb)
2161 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2162
2163 cb = sv_2mortal (coro->rouse_cb);
2164 coro->rouse_cb = 0;
2165 }
2166
2167 if (!SvROK (cb)
2168 || SvTYPE (SvRV (cb)) != SVt_PVCV
2169 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2170 croak ("Coro::rouse_wait called with illegal callback argument,");
2171
2172 {
2173 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2174 SV *data = (SV *)S_GENSUB_ARG;
2175
2176 frame->data = (void *)data;
2177 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2178 frame->check = slf_check_rouse_wait;
2179 }
2180}
2181
2182static SV *
2183coro_new_rouse_cb (pTHX)
2184{
2185 HV *hv = (HV *)SvRV (coro_current);
2186 struct coro *coro = SvSTATE_hv (hv);
2187 SV *data = newRV_inc ((SV *)hv);
2188 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2189
2190 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2191 SvREFCNT_dec (data); /* magicext increases the refcount */
2192
2193 SvREFCNT_dec (coro->rouse_cb);
2194 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2195
2196 return cb;
2197}
2198
2199/*****************************************************************************/
2200/* schedule-like-function opcode (SLF) */
2201
2202static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2203static const CV *slf_cv;
2204static SV **slf_argv;
2205static int slf_argc, slf_arga; /* count, allocated */
2206static I32 slf_ax; /* top of stack, for restore */
2207
2208/* this restores the stack in the case we patched the entersub, to */
2209/* recreate the stack frame as perl will on following calls */
2210/* since entersub cleared the stack */
2211static OP *
2212pp_restore (pTHX)
2213{
2214 int i;
2215 SV **SP = PL_stack_base + slf_ax;
2216
2217 PUSHMARK (SP);
2218
2219 EXTEND (SP, slf_argc + 1);
2220
2221 for (i = 0; i < slf_argc; ++i)
2222 PUSHs (sv_2mortal (slf_argv [i]));
2223
2224 PUSHs ((SV *)CvGV (slf_cv));
2225
2226 RETURNOP (slf_restore.op_first);
2227}
2228
2229static void
2230slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2231{
2232 SV **arg = (SV **)slf_frame.data;
2233
2234 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2235}
2236
2237static void
2238slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2239{
2240 if (items != 2)
2241 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2242
2243 frame->prepare = slf_prepare_transfer;
2244 frame->check = slf_check_nop;
2245 frame->data = (void *)arg; /* let's hope it will stay valid */
2246}
2247
2248static void
2249slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2250{
2251 frame->prepare = prepare_schedule;
2252 frame->check = slf_check_nop;
2253}
2254
2255static void
952prepare_cede (aTHX_ struct transfer_args *ta) 2256slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
953{ 2257{
954 LOCK; 2258 struct coro *next = (struct coro *)slf_frame.data;
955 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
956 UNLOCK;
957 2259
2260 SvREFCNT_inc_NN (next->hv);
958 prepare_schedule (ta); 2261 prepare_schedule_to (aTHX_ ta, next);
959} 2262}
960 2263
961static void 2264static void
962api_schedule (void) 2265slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
963{ 2266{
964 dTHX; 2267 if (!items)
2268 croak ("Coro::schedule_to expects a coroutine argument, caught");
2269
2270 frame->data = (void *)SvSTATE (arg [0]);
2271 frame->prepare = slf_prepare_schedule_to;
2272 frame->check = slf_check_nop;
2273}
2274
2275static void
2276slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2277{
2278 api_ready (aTHX_ SvRV (coro_current));
2279
2280 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2281}
2282
2283static void
2284slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2285{
2286 frame->prepare = prepare_cede;
2287 frame->check = slf_check_nop;
2288}
2289
2290static void
2291slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2292{
2293 frame->prepare = prepare_cede_notself;
2294 frame->check = slf_check_nop;
2295}
2296
2297/*
2298 * these not obviously related functions are all rolled into one
2299 * function to increase chances that they all will call transfer with the same
2300 * stack offset
2301 * SLF stands for "schedule-like-function".
2302 */
2303static OP *
2304pp_slf (pTHX)
2305{
2306 I32 checkmark; /* mark SP to see how many elements check has pushed */
2307
2308 /* set up the slf frame, unless it has already been set-up */
2309 /* the latter happens when a new coro has been started */
2310 /* or when a new cctx was attached to an existing coroutine */
2311 if (expect_true (!slf_frame.prepare))
2312 {
2313 /* first iteration */
2314 dSP;
2315 SV **arg = PL_stack_base + TOPMARK + 1;
2316 int items = SP - arg; /* args without function object */
2317 SV *gv = *sp;
2318
2319 /* do a quick consistency check on the "function" object, and if it isn't */
2320 /* for us, divert to the real entersub */
2321 if (SvTYPE (gv) != SVt_PVGV
2322 || !GvCV (gv)
2323 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2324 return PL_ppaddr[OP_ENTERSUB](aTHX);
2325
2326 if (!(PL_op->op_flags & OPf_STACKED))
2327 {
2328 /* ampersand-form of call, use @_ instead of stack */
2329 AV *av = GvAV (PL_defgv);
2330 arg = AvARRAY (av);
2331 items = AvFILLp (av) + 1;
2332 }
2333
2334 /* now call the init function, which needs to set up slf_frame */
2335 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2336 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2337
2338 /* pop args */
2339 SP = PL_stack_base + POPMARK;
2340
2341 PUTBACK;
2342 }
2343
2344 /* now that we have a slf_frame, interpret it! */
2345 /* we use a callback system not to make the code needlessly */
2346 /* complicated, but so we can run multiple perl coros from one cctx */
2347
2348 do
2349 {
965 struct transfer_args ta; 2350 struct coro_transfer_args ta;
966 2351
967 prepare_schedule (&ta); 2352 slf_frame.prepare (aTHX_ &ta);
968 TRANSFER (ta); 2353 TRANSFER (ta, 0);
969}
970 2354
2355 checkmark = PL_stack_sp - PL_stack_base;
2356 }
2357 while (slf_frame.check (aTHX_ &slf_frame));
2358
2359 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2360
2361 /* exception handling */
2362 if (expect_false (CORO_THROW))
2363 {
2364 SV *exception = sv_2mortal (CORO_THROW);
2365
2366 CORO_THROW = 0;
2367 sv_setsv (ERRSV, exception);
2368 croak (0);
2369 }
2370
2371 /* return value handling - mostly like entersub */
2372 /* make sure we put something on the stack in scalar context */
2373 if (GIMME_V == G_SCALAR)
2374 {
2375 dSP;
2376 SV **bot = PL_stack_base + checkmark;
2377
2378 if (sp == bot) /* too few, push undef */
2379 bot [1] = &PL_sv_undef;
2380 else if (sp != bot + 1) /* too many, take last one */
2381 bot [1] = *sp;
2382
2383 SP = bot + 1;
2384
2385 PUTBACK;
2386 }
2387
2388 return NORMAL;
2389}
2390
2391static void
2392api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2393{
2394 int i;
2395 SV **arg = PL_stack_base + ax;
2396 int items = PL_stack_sp - arg + 1;
2397
2398 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2399
2400 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2401 && PL_op->op_ppaddr != pp_slf)
2402 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2403
2404 CvFLAGS (cv) |= CVf_SLF;
2405 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2406 slf_cv = cv;
2407
2408 /* we patch the op, and then re-run the whole call */
2409 /* we have to put the same argument on the stack for this to work */
2410 /* and this will be done by pp_restore */
2411 slf_restore.op_next = (OP *)&slf_restore;
2412 slf_restore.op_type = OP_CUSTOM;
2413 slf_restore.op_ppaddr = pp_restore;
2414 slf_restore.op_first = PL_op;
2415
2416 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2417
2418 if (PL_op->op_flags & OPf_STACKED)
2419 {
2420 if (items > slf_arga)
2421 {
2422 slf_arga = items;
2423 free (slf_argv);
2424 slf_argv = malloc (slf_arga * sizeof (SV *));
2425 }
2426
2427 slf_argc = items;
2428
2429 for (i = 0; i < items; ++i)
2430 slf_argv [i] = SvREFCNT_inc (arg [i]);
2431 }
2432 else
2433 slf_argc = 0;
2434
2435 PL_op->op_ppaddr = pp_slf;
2436 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2437
2438 PL_op = (OP *)&slf_restore;
2439}
2440
2441/*****************************************************************************/
2442/* dynamic wind */
2443
2444static void
2445on_enterleave_call (pTHX_ SV *cb)
2446{
2447 dSP;
2448
2449 PUSHSTACK;
2450
2451 PUSHMARK (SP);
2452 PUTBACK;
2453 call_sv (cb, G_VOID | G_DISCARD);
2454 SPAGAIN;
2455
2456 POPSTACK;
2457}
2458
2459static SV *
2460coro_avp_pop_and_free (pTHX_ AV **avp)
2461{
2462 AV *av = *avp;
2463 SV *res = av_pop (av);
2464
2465 if (AvFILLp (av) < 0)
2466 {
2467 *avp = 0;
2468 SvREFCNT_dec (av);
2469 }
2470
2471 return res;
2472}
2473
2474static void
2475coro_pop_on_enter (pTHX_ void *coro)
2476{
2477 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2478 SvREFCNT_dec (cb);
2479}
2480
2481static void
2482coro_pop_on_leave (pTHX_ void *coro)
2483{
2484 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2485 on_enterleave_call (aTHX_ sv_2mortal (cb));
2486}
2487
2488/*****************************************************************************/
2489/* PerlIO::cede */
2490
2491typedef struct
2492{
2493 PerlIOBuf base;
2494 NV next, every;
2495} PerlIOCede;
2496
2497static IV
2498PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2499{
2500 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2501
2502 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2503 self->next = nvtime () + self->every;
2504
2505 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2506}
2507
2508static SV *
2509PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2510{
2511 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2512
2513 return newSVnv (self->every);
2514}
2515
2516static IV
2517PerlIOCede_flush (pTHX_ PerlIO *f)
2518{
2519 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2520 double now = nvtime ();
2521
2522 if (now >= self->next)
2523 {
2524 api_cede (aTHX);
2525 self->next = now + self->every;
2526 }
2527
2528 return PerlIOBuf_flush (aTHX_ f);
2529}
2530
2531static PerlIO_funcs PerlIO_cede =
2532{
2533 sizeof(PerlIO_funcs),
2534 "cede",
2535 sizeof(PerlIOCede),
2536 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2537 PerlIOCede_pushed,
2538 PerlIOBuf_popped,
2539 PerlIOBuf_open,
2540 PerlIOBase_binmode,
2541 PerlIOCede_getarg,
2542 PerlIOBase_fileno,
2543 PerlIOBuf_dup,
2544 PerlIOBuf_read,
2545 PerlIOBuf_unread,
2546 PerlIOBuf_write,
2547 PerlIOBuf_seek,
2548 PerlIOBuf_tell,
2549 PerlIOBuf_close,
2550 PerlIOCede_flush,
2551 PerlIOBuf_fill,
2552 PerlIOBase_eof,
2553 PerlIOBase_error,
2554 PerlIOBase_clearerr,
2555 PerlIOBase_setlinebuf,
2556 PerlIOBuf_get_base,
2557 PerlIOBuf_bufsiz,
2558 PerlIOBuf_get_ptr,
2559 PerlIOBuf_get_cnt,
2560 PerlIOBuf_set_ptrcnt,
2561};
2562
2563/*****************************************************************************/
2564/* Coro::Semaphore & Coro::Signal */
2565
2566static SV *
2567coro_waitarray_new (pTHX_ int count)
2568{
2569 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2570 AV *av = newAV ();
2571 SV **ary;
2572
2573 /* unfortunately, building manually saves memory */
2574 Newx (ary, 2, SV *);
2575 AvALLOC (av) = ary;
2576#if PERL_VERSION_ATLEAST (5,10,0)
2577 AvARRAY (av) = ary;
2578#else
2579 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2580 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2581 SvPVX ((SV *)av) = (char *)ary;
2582#endif
2583 AvMAX (av) = 1;
2584 AvFILLp (av) = 0;
2585 ary [0] = newSViv (count);
2586
2587 return newRV_noinc ((SV *)av);
2588}
2589
2590/* semaphore */
2591
2592static void
2593coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2594{
2595 SV *count_sv = AvARRAY (av)[0];
2596 IV count = SvIVX (count_sv);
2597
2598 count += adjust;
2599 SvIVX (count_sv) = count;
2600
2601 /* now wake up as many waiters as are expected to lock */
2602 while (count > 0 && AvFILLp (av) > 0)
2603 {
2604 SV *cb;
2605
2606 /* swap first two elements so we can shift a waiter */
2607 AvARRAY (av)[0] = AvARRAY (av)[1];
2608 AvARRAY (av)[1] = count_sv;
2609 cb = av_shift (av);
2610
2611 if (SvOBJECT (cb))
2612 {
2613 api_ready (aTHX_ cb);
2614 --count;
2615 }
2616 else if (SvTYPE (cb) == SVt_PVCV)
2617 {
2618 dSP;
2619 PUSHMARK (SP);
2620 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2621 PUTBACK;
2622 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2623 }
2624
2625 SvREFCNT_dec (cb);
2626 }
2627}
2628
2629static void
2630coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2631{
2632 /* call $sem->adjust (0) to possibly wake up some other waiters */
2633 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2634}
2635
971static void 2636static int
972api_cede (void) 2637slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
973{ 2638{
974 dTHX; 2639 AV *av = (AV *)frame->data;
975 struct transfer_args ta; 2640 SV *count_sv = AvARRAY (av)[0];
976 2641
977 prepare_cede (&ta); 2642 /* if we are about to throw, don't actually acquire the lock, just throw */
978 TRANSFER (ta); 2643 if (CORO_THROW)
979} 2644 return 0;
2645 else if (SvIVX (count_sv) > 0)
2646 {
2647 SvSTATE_current->on_destroy = 0;
980 2648
2649 if (acquire)
2650 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2651 else
2652 coro_semaphore_adjust (aTHX_ av, 0);
2653
2654 return 0;
2655 }
2656 else
2657 {
2658 int i;
2659 /* if we were woken up but can't down, we look through the whole */
2660 /* waiters list and only add us if we aren't in there already */
2661 /* this avoids some degenerate memory usage cases */
2662
2663 for (i = 1; i <= AvFILLp (av); ++i)
2664 if (AvARRAY (av)[i] == SvRV (coro_current))
2665 return 1;
2666
2667 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2668 return 1;
2669 }
2670}
2671
2672static int
2673slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2674{
2675 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2676}
2677
2678static int
2679slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2680{
2681 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2682}
2683
2684static void
2685slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2686{
2687 AV *av = (AV *)SvRV (arg [0]);
2688
2689 if (SvIVX (AvARRAY (av)[0]) > 0)
2690 {
2691 frame->data = (void *)av;
2692 frame->prepare = prepare_nop;
2693 }
2694 else
2695 {
2696 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2697
2698 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2699 frame->prepare = prepare_schedule;
2700
2701 /* to avoid race conditions when a woken-up coro gets terminated */
2702 /* we arrange for a temporary on_destroy that calls adjust (0) */
2703 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2704 }
2705}
2706
2707static void
2708slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2709{
2710 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2711 frame->check = slf_check_semaphore_down;
2712}
2713
2714static void
2715slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2716{
2717 if (items >= 2)
2718 {
2719 /* callback form */
2720 AV *av = (AV *)SvRV (arg [0]);
2721 SV *cb_cv = s_get_cv_croak (arg [1]);
2722
2723 av_push (av, SvREFCNT_inc_NN (cb_cv));
2724
2725 if (SvIVX (AvARRAY (av)[0]) > 0)
2726 coro_semaphore_adjust (aTHX_ av, 0);
2727
2728 frame->prepare = prepare_nop;
2729 frame->check = slf_check_nop;
2730 }
2731 else
2732 {
2733 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2734 frame->check = slf_check_semaphore_wait;
2735 }
2736}
2737
2738/* signal */
2739
2740static void
2741coro_signal_wake (pTHX_ AV *av, int count)
2742{
2743 SvIVX (AvARRAY (av)[0]) = 0;
2744
2745 /* now signal count waiters */
2746 while (count > 0 && AvFILLp (av) > 0)
2747 {
2748 SV *cb;
2749
2750 /* swap first two elements so we can shift a waiter */
2751 cb = AvARRAY (av)[0];
2752 AvARRAY (av)[0] = AvARRAY (av)[1];
2753 AvARRAY (av)[1] = cb;
2754
2755 cb = av_shift (av);
2756
2757 if (SvTYPE (cb) == SVt_PVCV)
2758 {
2759 dSP;
2760 PUSHMARK (SP);
2761 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2762 PUTBACK;
2763 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2764 }
2765 else
2766 {
2767 api_ready (aTHX_ cb);
2768 sv_setiv (cb, 0); /* signal waiter */
2769 }
2770
2771 SvREFCNT_dec (cb);
2772
2773 --count;
2774 }
2775}
2776
2777static int
2778slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2779{
2780 /* if we are about to throw, also stop waiting */
2781 return SvROK ((SV *)frame->data) && !CORO_THROW;
2782}
2783
2784static void
2785slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2786{
2787 AV *av = (AV *)SvRV (arg [0]);
2788
2789 if (items >= 2)
2790 {
2791 SV *cb_cv = s_get_cv_croak (arg [1]);
2792 av_push (av, SvREFCNT_inc_NN (cb_cv));
2793
2794 if (SvIVX (AvARRAY (av)[0]))
2795 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2796
2797 frame->prepare = prepare_nop;
2798 frame->check = slf_check_nop;
2799 }
2800 else if (SvIVX (AvARRAY (av)[0]))
2801 {
2802 SvIVX (AvARRAY (av)[0]) = 0;
2803 frame->prepare = prepare_nop;
2804 frame->check = slf_check_nop;
2805 }
2806 else
2807 {
2808 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2809
2810 av_push (av, waiter);
2811
2812 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2813 frame->prepare = prepare_schedule;
2814 frame->check = slf_check_signal_wait;
2815 }
2816}
2817
2818/*****************************************************************************/
2819/* Coro::AIO */
2820
2821#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2822
2823/* helper storage struct */
2824struct io_state
2825{
2826 int errorno;
2827 I32 laststype; /* U16 in 5.10.0 */
2828 int laststatval;
2829 Stat_t statcache;
2830};
2831
2832static void
2833coro_aio_callback (pTHX_ CV *cv)
2834{
2835 dXSARGS;
2836 AV *state = (AV *)S_GENSUB_ARG;
2837 SV *coro = av_pop (state);
2838 SV *data_sv = newSV (sizeof (struct io_state));
2839
2840 av_extend (state, items - 1);
2841
2842 sv_upgrade (data_sv, SVt_PV);
2843 SvCUR_set (data_sv, sizeof (struct io_state));
2844 SvPOK_only (data_sv);
2845
2846 {
2847 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2848
2849 data->errorno = errno;
2850 data->laststype = PL_laststype;
2851 data->laststatval = PL_laststatval;
2852 data->statcache = PL_statcache;
2853 }
2854
2855 /* now build the result vector out of all the parameters and the data_sv */
2856 {
2857 int i;
2858
2859 for (i = 0; i < items; ++i)
2860 av_push (state, SvREFCNT_inc_NN (ST (i)));
2861 }
2862
2863 av_push (state, data_sv);
2864
2865 api_ready (aTHX_ coro);
2866 SvREFCNT_dec (coro);
2867 SvREFCNT_dec ((AV *)state);
2868}
2869
2870static int
2871slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2872{
2873 AV *state = (AV *)frame->data;
2874
2875 /* if we are about to throw, return early */
2876 /* this does not cancel the aio request, but at least */
2877 /* it quickly returns */
2878 if (CORO_THROW)
2879 return 0;
2880
2881 /* one element that is an RV? repeat! */
2882 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2883 return 1;
2884
2885 /* restore status */
2886 {
2887 SV *data_sv = av_pop (state);
2888 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2889
2890 errno = data->errorno;
2891 PL_laststype = data->laststype;
2892 PL_laststatval = data->laststatval;
2893 PL_statcache = data->statcache;
2894
2895 SvREFCNT_dec (data_sv);
2896 }
2897
2898 /* push result values */
2899 {
2900 dSP;
2901 int i;
2902
2903 EXTEND (SP, AvFILLp (state) + 1);
2904 for (i = 0; i <= AvFILLp (state); ++i)
2905 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2906
2907 PUTBACK;
2908 }
2909
2910 return 0;
2911}
2912
2913static void
2914slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2915{
2916 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2917 SV *coro_hv = SvRV (coro_current);
2918 struct coro *coro = SvSTATE_hv (coro_hv);
2919
2920 /* put our coroutine id on the state arg */
2921 av_push (state, SvREFCNT_inc_NN (coro_hv));
2922
2923 /* first see whether we have a non-zero priority and set it as AIO prio */
2924 if (coro->prio)
2925 {
2926 dSP;
2927
2928 static SV *prio_cv;
2929 static SV *prio_sv;
2930
2931 if (expect_false (!prio_cv))
2932 {
2933 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2934 prio_sv = newSViv (0);
2935 }
2936
2937 PUSHMARK (SP);
2938 sv_setiv (prio_sv, coro->prio);
2939 XPUSHs (prio_sv);
2940
2941 PUTBACK;
2942 call_sv (prio_cv, G_VOID | G_DISCARD);
2943 }
2944
2945 /* now call the original request */
2946 {
2947 dSP;
2948 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2949 int i;
2950
2951 PUSHMARK (SP);
2952
2953 /* first push all args to the stack */
2954 EXTEND (SP, items + 1);
2955
2956 for (i = 0; i < items; ++i)
2957 PUSHs (arg [i]);
2958
2959 /* now push the callback closure */
2960 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2961
2962 /* now call the AIO function - we assume our request is uncancelable */
2963 PUTBACK;
2964 call_sv ((SV *)req, G_VOID | G_DISCARD);
2965 }
2966
2967 /* now that the requets is going, we loop toll we have a result */
2968 frame->data = (void *)state;
2969 frame->prepare = prepare_schedule;
2970 frame->check = slf_check_aio_req;
2971}
2972
2973static void
2974coro_aio_req_xs (pTHX_ CV *cv)
2975{
2976 dXSARGS;
2977
2978 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2979
2980 XSRETURN_EMPTY;
2981}
2982
2983/*****************************************************************************/
2984
2985#if CORO_CLONE
2986# include "clone.c"
2987#endif
2988
2989/*****************************************************************************/
2990
2991static SV *
2992coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2993{
2994 SV *coro_sv;
2995 struct coro *coro;
2996 MAGIC *mg;
2997 HV *hv;
2998 SV *cb;
2999 int i;
3000
3001 if (argc > 0)
3002 {
3003 cb = s_get_cv_croak (argv [0]);
3004
3005 if (!is_coro)
3006 {
3007 if (CvISXSUB (cb))
3008 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3009
3010 if (!CvROOT (cb))
3011 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3012 }
3013 }
3014
3015 Newz (0, coro, 1, struct coro);
3016 coro->args = newAV ();
3017 coro->flags = CF_NEW;
3018
3019 if (coro_first) coro_first->prev = coro;
3020 coro->next = coro_first;
3021 coro_first = coro;
3022
3023 coro->hv = hv = newHV ();
3024 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3025 mg->mg_flags |= MGf_DUP;
3026 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3027
3028 if (argc > 0)
3029 {
3030 av_extend (coro->args, argc + is_coro - 1);
3031
3032 if (is_coro)
3033 {
3034 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3035 cb = (SV *)cv_coro_run;
3036 }
3037
3038 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3039
3040 for (i = 1; i < argc; i++)
3041 av_push (coro->args, newSVsv (argv [i]));
3042 }
3043
3044 return coro_sv;
3045}
3046
981MODULE = Coro::State PACKAGE = Coro::State 3047MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
982 3048
983PROTOTYPES: DISABLE 3049PROTOTYPES: DISABLE
984 3050
985BOOT: 3051BOOT:
986{ 3052{
987#ifdef USE_ITHREADS 3053#ifdef USE_ITHREADS
988 MUTEX_INIT (&coro_mutex); 3054# if CORO_PTHREAD
3055 coro_thx = PERL_GET_CONTEXT;
3056# endif
989#endif 3057#endif
990 BOOT_PAGESIZE; 3058 BOOT_PAGESIZE;
991 3059
3060 cctx_current = cctx_new_empty ();
3061
3062 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3063 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3064
3065 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3066 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3067 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3068
3069 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3070 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3071 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3072
992 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3073 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
993 3074
994 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3075 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
995 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3076 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
996 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3077 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3078 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
997 3079
998 main_mainstack = PL_mainstack; 3080 main_mainstack = PL_mainstack;
3081 main_top_env = PL_top_env;
999 3082
3083 while (main_top_env->je_prev)
3084 main_top_env = main_top_env->je_prev;
3085
3086 {
3087 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3088
3089 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3090 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3091
3092 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3093 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3094 }
3095
1000 coroapi.ver = CORO_API_VERSION; 3096 coroapi.ver = CORO_API_VERSION;
3097 coroapi.rev = CORO_API_REVISION;
3098
1001 coroapi.transfer = api_transfer; 3099 coroapi.transfer = api_transfer;
1002 3100
1003 Newz (0, main_stack, 1, coro_stack); 3101 coroapi.sv_state = SvSTATE_;
1004 main_stack->idle_sp = (void *)-1; 3102 coroapi.execute_slf = api_execute_slf;
3103 coroapi.prepare_nop = prepare_nop;
3104 coroapi.prepare_schedule = prepare_schedule;
3105 coroapi.prepare_cede = prepare_cede;
3106 coroapi.prepare_cede_notself = prepare_cede_notself;
1005 3107
3108 {
3109 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3110
3111 if (!svp) croak ("Time::HiRes is required");
3112 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3113
3114 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3115
3116 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3117 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3118 }
3119
1006 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3120 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1007} 3121}
1008 3122
1009SV * 3123SV *
1010new (char *klass, ...) 3124new (SV *klass, ...)
3125 ALIAS:
3126 Coro::new = 1
1011 CODE: 3127 CODE:
1012{ 3128 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1013 struct coro *coro; 3129 OUTPUT:
1014 HV *hv;
1015 int i;
1016
1017 Newz (0, coro, 1, struct coro);
1018 coro->args = newAV ();
1019
1020 hv = newHV ();
1021 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1022 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1023
1024 for (i = 1; i < items; i++)
1025 av_push (coro->args, newSVsv (ST (i)));
1026
1027 coro->stack = main_stack;
1028 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1029 /*coro->stack = 0;*/
1030}
1031 OUTPUT:
1032 RETVAL 3130 RETVAL
1033 3131
1034void 3132void
1035transfer (...) 3133transfer (...)
1036 ALIAS: 3134 PROTOTYPE: $$
1037 Coro::schedule = 1 3135 CODE:
1038 Coro::cede = 2 3136 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1039 _set_stacklevel = 3
1040 CODE:
1041{
1042 struct transfer_args ta;
1043 3137
1044 switch (ix) 3138bool
1045 { 3139_destroy (SV *coro_sv)
1046 case 0: 3140 CODE:
1047 if (items != 3) 3141 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1048 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 3142 OUTPUT:
1049 3143 RETVAL
1050 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1051 break;
1052
1053 case 1:
1054 prepare_schedule (&ta);
1055 break;
1056
1057 case 2:
1058 prepare_cede (&ta);
1059 break;
1060
1061 case 3:
1062 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
1063 ta.next = 0;
1064 ta.flags = TRANSFER_SET_STACKLEVEL;
1065 break;
1066 }
1067
1068 TRANSFER (ta);
1069}
1070 3144
1071void 3145void
1072_clone_state_from (SV *dst, SV *src)
1073 CODE:
1074{
1075 struct coro *coro_src = SvSTATE (src);
1076
1077 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1078
1079 ++coro_src->refcnt;
1080 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1081}
1082
1083void
1084_nonlocal_goto (IV nextop)
1085 CODE:
1086 /* uuh, somebody will kill me again for this */
1087 PL_op->op_next = INT2PTR (OP *, nextop);
1088
1089void
1090_exit (code) 3146_exit (int code)
1091 int code
1092 PROTOTYPE: $ 3147 PROTOTYPE: $
1093 CODE: 3148 CODE:
1094 _exit (code); 3149 _exit (code);
1095 3150
1096MODULE = Coro::State PACKAGE = Coro::Cont 3151SV *
3152clone (Coro::State coro)
3153 CODE:
3154{
3155#if CORO_CLONE
3156 struct coro *ncoro = coro_clone (aTHX_ coro);
3157 MAGIC *mg;
3158 /* TODO: too much duplication */
3159 ncoro->hv = newHV ();
3160 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3161 mg->mg_flags |= MGf_DUP;
3162 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3163#else
3164 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3165#endif
3166}
3167 OUTPUT:
3168 RETVAL
3169
3170int
3171cctx_stacksize (int new_stacksize = 0)
3172 PROTOTYPE: ;$
3173 CODE:
3174 RETVAL = cctx_stacksize;
3175 if (new_stacksize)
3176 {
3177 cctx_stacksize = new_stacksize;
3178 ++cctx_gen;
3179 }
3180 OUTPUT:
3181 RETVAL
3182
3183int
3184cctx_max_idle (int max_idle = 0)
3185 PROTOTYPE: ;$
3186 CODE:
3187 RETVAL = cctx_max_idle;
3188 if (max_idle > 1)
3189 cctx_max_idle = max_idle;
3190 OUTPUT:
3191 RETVAL
3192
3193int
3194cctx_count ()
3195 PROTOTYPE:
3196 CODE:
3197 RETVAL = cctx_count;
3198 OUTPUT:
3199 RETVAL
3200
3201int
3202cctx_idle ()
3203 PROTOTYPE:
3204 CODE:
3205 RETVAL = cctx_idle;
3206 OUTPUT:
3207 RETVAL
1097 3208
1098void 3209void
1099yield (...) 3210list ()
1100 PROTOTYPE: @ 3211 PROTOTYPE:
3212 PPCODE:
3213{
3214 struct coro *coro;
3215 for (coro = coro_first; coro; coro = coro->next)
3216 if (coro->hv)
3217 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3218}
3219
3220void
3221call (Coro::State coro, SV *coderef)
3222 ALIAS:
3223 eval = 1
3224 CODE:
3225{
3226 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3227 {
3228 struct coro *current = SvSTATE_current;
3229
3230 if (current != coro)
3231 {
3232 PUTBACK;
3233 save_perl (aTHX_ current);
3234 load_perl (aTHX_ coro);
3235 SPAGAIN;
3236 }
3237
3238 PUSHSTACK;
3239
3240 PUSHMARK (SP);
3241 PUTBACK;
3242
3243 if (ix)
3244 eval_sv (coderef, 0);
3245 else
3246 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3247
3248 POPSTACK;
3249 SPAGAIN;
3250
3251 if (current != coro)
3252 {
3253 PUTBACK;
3254 save_perl (aTHX_ coro);
3255 load_perl (aTHX_ current);
3256 SPAGAIN;
3257 }
3258 }
3259}
3260
3261SV *
3262is_ready (Coro::State coro)
3263 PROTOTYPE: $
3264 ALIAS:
3265 is_ready = CF_READY
3266 is_running = CF_RUNNING
3267 is_new = CF_NEW
3268 is_destroyed = CF_DESTROYED
3269 is_suspended = CF_SUSPENDED
3270 CODE:
3271 RETVAL = boolSV (coro->flags & ix);
3272 OUTPUT:
3273 RETVAL
3274
3275void
3276throw (Coro::State self, SV *throw = &PL_sv_undef)
3277 PROTOTYPE: $;$
1101 CODE: 3278 CODE:
1102{ 3279{
1103 SV *yieldstack; 3280 struct coro *current = SvSTATE_current;
1104 SV *sv; 3281 SV **throwp = self == current ? &CORO_THROW : &self->except;
1105 AV *defav = GvAV (PL_defgv); 3282 SvREFCNT_dec (*throwp);
1106 struct coro *prev, *next; 3283 SvGETMAGIC (throw);
3284 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3285}
1107 3286
1108 yieldstack = *hv_fetch ( 3287void
1109 (HV *)SvRV (GvSV (coro_current)), 3288api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1110 "yieldstack", sizeof ("yieldstack") - 1, 3289 PROTOTYPE: $;$
3290 C_ARGS: aTHX_ coro, flags
3291
3292SV *
3293has_cctx (Coro::State coro)
3294 PROTOTYPE: $
3295 CODE:
3296 /* maybe manage the running flag differently */
3297 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3298 OUTPUT:
3299 RETVAL
3300
3301int
3302is_traced (Coro::State coro)
3303 PROTOTYPE: $
3304 CODE:
3305 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3306 OUTPUT:
3307 RETVAL
3308
3309UV
3310rss (Coro::State coro)
3311 PROTOTYPE: $
3312 ALIAS:
3313 usecount = 1
3314 CODE:
3315 switch (ix)
3316 {
3317 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3318 case 1: RETVAL = coro->usecount; break;
1111 0 3319 }
3320 OUTPUT:
3321 RETVAL
3322
3323void
3324force_cctx ()
3325 PROTOTYPE:
3326 CODE:
3327 cctx_current->idle_sp = 0;
3328
3329void
3330swap_defsv (Coro::State self)
3331 PROTOTYPE: $
3332 ALIAS:
3333 swap_defav = 1
3334 CODE:
3335 if (!self->slot)
3336 croak ("cannot swap state with coroutine that has no saved state,");
3337 else
1112 ); 3338 {
3339 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3340 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1113 3341
1114 /* set up @_ -- ugly */ 3342 SV *tmp = *src; *src = *dst; *dst = tmp;
1115 av_clear (defav); 3343 }
1116 av_fill (defav, items - 1);
1117 while (items--)
1118 av_store (defav, items, SvREFCNT_inc (ST(items)));
1119 3344
1120 sv = av_pop ((AV *)SvRV (yieldstack)); 3345void
1121 prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0)); 3346cancel (Coro::State self)
1122 next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0)); 3347 CODE:
1123 SvREFCNT_dec (sv); 3348 coro_state_destroy (aTHX_ self);
3349 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
1124 3350
1125 coro_state_transfer (aTHX_ prev, next, 0); 3351
3352SV *
3353enable_times (int enabled = enable_times)
3354 CODE:
3355{
3356 RETVAL = boolSV (enable_times);
3357
3358 if (enabled != enable_times)
3359 {
3360 enable_times = enabled;
3361
3362 coro_times_update ();
3363 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3364 }
1126} 3365}
3366 OUTPUT:
3367 RETVAL
3368
3369void
3370times (Coro::State self)
3371 PPCODE:
3372{
3373 struct coro *current = SvSTATE (coro_current);
3374
3375 if (expect_false (current == self))
3376 {
3377 coro_times_update ();
3378 coro_times_add (SvSTATE (coro_current));
3379 }
3380
3381 EXTEND (SP, 2);
3382 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3383 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3384
3385 if (expect_false (current == self))
3386 coro_times_sub (SvSTATE (coro_current));
3387}
3388
3389void
3390swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3391 CODE:
3392{
3393 struct coro *current = SvSTATE_current;
3394
3395 if (current == coro)
3396 SWAP_SVS (current);
3397
3398 if (!coro->swap_sv)
3399 coro->swap_sv = newAV ();
3400
3401 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3402 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3403
3404 if (current == coro)
3405 SWAP_SVS (current);
3406}
3407
1127 3408
1128MODULE = Coro::State PACKAGE = Coro 3409MODULE = Coro::State PACKAGE = Coro
1129 3410
1130BOOT: 3411BOOT:
1131{ 3412{
1132 int i; 3413 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3414 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3415 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3416 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3417 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3418 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3419 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3420 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3421 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1133 3422
3423 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3424 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3425 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3426 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3427
1134 coro_stash = gv_stashpv ("Coro", TRUE); 3428 coro_stash = gv_stashpv ("Coro", TRUE);
1135 3429
1136 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3430 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1137 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3431 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1138 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3432 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1139 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3433 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1140 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3434 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1141 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3435 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1142
1143 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1144 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1145
1146 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1147 coro_ready[i] = newAV ();
1148 3436
1149 { 3437 {
1150 SV *sv = perl_get_sv("Coro::API", 1); 3438 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1151 3439
1152 coroapi.schedule = api_schedule; 3440 coroapi.schedule = api_schedule;
3441 coroapi.schedule_to = api_schedule_to;
1153 coroapi.cede = api_cede; 3442 coroapi.cede = api_cede;
3443 coroapi.cede_notself = api_cede_notself;
1154 coroapi.ready = api_ready; 3444 coroapi.ready = api_ready;
3445 coroapi.is_ready = api_is_ready;
1155 coroapi.nready = &coro_nready; 3446 coroapi.nready = coro_nready;
1156 coroapi.current = coro_current; 3447 coroapi.current = coro_current;
1157 3448
1158 GCoroAPI = &coroapi; 3449 /*GCoroAPI = &coroapi;*/
1159 sv_setiv (sv, (IV)&coroapi); 3450 sv_setiv (sv, (IV)&coroapi);
1160 SvREADONLY_on (sv); 3451 SvREADONLY_on (sv);
1161 } 3452 }
1162} 3453}
1163 3454
3455SV *
3456async (...)
3457 PROTOTYPE: &@
3458 CODE:
3459 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3460 api_ready (aTHX_ RETVAL);
3461 OUTPUT:
3462 RETVAL
3463
3464void
3465terminate (...)
3466 CODE:
3467 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3468
3469void
3470schedule (...)
3471 CODE:
3472 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3473
3474void
3475schedule_to (...)
3476 CODE:
3477 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3478
3479void
3480cede_to (...)
3481 CODE:
3482 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3483
3484void
3485cede (...)
3486 CODE:
3487 CORO_EXECUTE_SLF_XS (slf_init_cede);
3488
3489void
3490cede_notself (...)
3491 CODE:
3492 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3493
3494void
3495_set_current (SV *current)
3496 PROTOTYPE: $
3497 CODE:
3498 SvREFCNT_dec (SvRV (coro_current));
3499 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3500
3501void
3502_set_readyhook (SV *hook)
3503 PROTOTYPE: $
3504 CODE:
3505 SvREFCNT_dec (coro_readyhook);
3506 SvGETMAGIC (hook);
3507 if (SvOK (hook))
3508 {
3509 coro_readyhook = newSVsv (hook);
3510 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3511 }
3512 else
3513 {
3514 coro_readyhook = 0;
3515 CORO_READYHOOK = 0;
3516 }
3517
1164int 3518int
1165prio (Coro::State coro, int newprio = 0) 3519prio (Coro::State coro, int newprio = 0)
3520 PROTOTYPE: $;$
1166 ALIAS: 3521 ALIAS:
1167 nice = 1 3522 nice = 1
1168 CODE: 3523 CODE:
1169{ 3524{
1170 RETVAL = coro->prio; 3525 RETVAL = coro->prio;
1171 3526
1172 if (items > 1) 3527 if (items > 1)
1173 { 3528 {
1174 if (ix) 3529 if (ix)
1175 newprio += coro->prio; 3530 newprio = coro->prio - newprio;
1176 3531
1177 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3532 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1178 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3533 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1179 3534
1180 coro->prio = newprio; 3535 coro->prio = newprio;
1181 } 3536 }
1182} 3537}
3538 OUTPUT:
3539 RETVAL
1183 3540
1184void 3541SV *
1185ready (SV *self) 3542ready (SV *self)
1186 PROTOTYPE: $ 3543 PROTOTYPE: $
1187 CODE: 3544 CODE:
1188 api_ready (self); 3545 RETVAL = boolSV (api_ready (aTHX_ self));
3546 OUTPUT:
3547 RETVAL
1189 3548
1190int 3549int
1191nready (...) 3550nready (...)
1192 PROTOTYPE: 3551 PROTOTYPE:
1193 CODE: 3552 CODE:
1194 RETVAL = coro_nready; 3553 RETVAL = coro_nready;
1195 OUTPUT: 3554 OUTPUT:
1196 RETVAL 3555 RETVAL
1197 3556
1198MODULE = Coro::State PACKAGE = Coro::AIO 3557void
3558suspend (Coro::State self)
3559 PROTOTYPE: $
3560 CODE:
3561 self->flags |= CF_SUSPENDED;
3562
3563void
3564resume (Coro::State self)
3565 PROTOTYPE: $
3566 CODE:
3567 self->flags &= ~CF_SUSPENDED;
3568
3569void
3570_pool_handler (...)
3571 CODE:
3572 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3573
3574void
3575async_pool (SV *cv, ...)
3576 PROTOTYPE: &@
3577 PPCODE:
3578{
3579 HV *hv = (HV *)av_pop (av_async_pool);
3580 AV *av = newAV ();
3581 SV *cb = ST (0);
3582 int i;
3583
3584 av_extend (av, items - 2);
3585 for (i = 1; i < items; ++i)
3586 av_push (av, SvREFCNT_inc_NN (ST (i)));
3587
3588 if ((SV *)hv == &PL_sv_undef)
3589 {
3590 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3591 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3592 SvREFCNT_dec (sv);
3593 }
3594
3595 {
3596 struct coro *coro = SvSTATE_hv (hv);
3597
3598 assert (!coro->invoke_cb);
3599 assert (!coro->invoke_av);
3600 coro->invoke_cb = SvREFCNT_inc (cb);
3601 coro->invoke_av = av;
3602 }
3603
3604 api_ready (aTHX_ (SV *)hv);
3605
3606 if (GIMME_V != G_VOID)
3607 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3608 else
3609 SvREFCNT_dec (hv);
3610}
1199 3611
1200SV * 3612SV *
1201_get_state () 3613rouse_cb ()
3614 PROTOTYPE:
1202 CODE: 3615 CODE:
1203{ 3616 RETVAL = coro_new_rouse_cb (aTHX);
1204 struct {
1205 int errorno;
1206 int laststype;
1207 int laststatval;
1208 Stat_t statcache;
1209 } data;
1210
1211 data.errorno = errno;
1212 data.laststype = PL_laststype;
1213 data.laststatval = PL_laststatval;
1214 data.statcache = PL_statcache;
1215
1216 RETVAL = newSVpvn ((char *)&data, sizeof data);
1217}
1218 OUTPUT: 3617 OUTPUT:
1219 RETVAL 3618 RETVAL
1220 3619
1221void 3620void
1222_set_state (char *data_) 3621rouse_wait (...)
3622 PROTOTYPE: ;$
3623 PPCODE:
3624 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3625
3626void
3627on_enter (SV *block)
3628 ALIAS:
3629 on_leave = 1
1223 PROTOTYPE: $ 3630 PROTOTYPE: &
1224 CODE: 3631 CODE:
1225{ 3632{
1226 struct { 3633 struct coro *coro = SvSTATE_current;
3634 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3635
3636 block = s_get_cv_croak (block);
3637
3638 if (!*avp)
3639 *avp = newAV ();
3640
3641 av_push (*avp, SvREFCNT_inc (block));
3642
3643 if (!ix)
3644 on_enterleave_call (aTHX_ block);
3645
3646 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3647 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3648 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3649}
3650
3651
3652MODULE = Coro::State PACKAGE = PerlIO::cede
3653
3654BOOT:
3655 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3656
3657
3658MODULE = Coro::State PACKAGE = Coro::Semaphore
3659
3660SV *
3661new (SV *klass, SV *count = 0)
3662 CODE:
3663{
3664 int semcnt = 1;
3665
3666 if (count)
3667 {
3668 SvGETMAGIC (count);
3669
3670 if (SvOK (count))
3671 semcnt = SvIV (count);
3672 }
3673
3674 RETVAL = sv_bless (
3675 coro_waitarray_new (aTHX_ semcnt),
3676 GvSTASH (CvGV (cv))
3677 );
3678}
3679 OUTPUT:
3680 RETVAL
3681
3682# helper for Coro::Channel and others
3683SV *
3684_alloc (int count)
3685 CODE:
3686 RETVAL = coro_waitarray_new (aTHX_ count);
3687 OUTPUT:
3688 RETVAL
3689
3690SV *
3691count (SV *self)
3692 CODE:
3693 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3694 OUTPUT:
3695 RETVAL
3696
3697void
3698up (SV *self, int adjust = 1)
3699 ALIAS:
3700 adjust = 1
3701 CODE:
3702 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3703
3704void
3705down (...)
3706 CODE:
3707 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3708
3709void
3710wait (...)
3711 CODE:
3712 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3713
3714void
3715try (SV *self)
3716 PPCODE:
3717{
3718 AV *av = (AV *)SvRV (self);
3719 SV *count_sv = AvARRAY (av)[0];
3720 IV count = SvIVX (count_sv);
3721
3722 if (count > 0)
3723 {
3724 --count;
3725 SvIVX (count_sv) = count;
3726 XSRETURN_YES;
3727 }
3728 else
3729 XSRETURN_NO;
3730}
3731
3732void
3733waiters (SV *self)
3734 PPCODE:
3735{
3736 AV *av = (AV *)SvRV (self);
3737 int wcount = AvFILLp (av) + 1 - 1;
3738
3739 if (GIMME_V == G_SCALAR)
3740 XPUSHs (sv_2mortal (newSViv (wcount)));
3741 else
3742 {
1227 int errorno; 3743 int i;
1228 int laststype; 3744 EXTEND (SP, wcount);
1229 int laststatval; 3745 for (i = 1; i <= wcount; ++i)
1230 Stat_t statcache; 3746 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1231 } *data = (void *)data_; 3747 }
1232
1233 errno = data->errorno;
1234 PL_laststype = data->laststype;
1235 PL_laststatval = data->laststatval;
1236 PL_statcache = data->statcache;
1237} 3748}
3749
3750MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3751
3752void
3753_may_delete (SV *sem, int count, int extra_refs)
3754 PPCODE:
3755{
3756 AV *av = (AV *)SvRV (sem);
3757
3758 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3759 && AvFILLp (av) == 0 /* no waiters, just count */
3760 && SvIV (AvARRAY (av)[0]) == count)
3761 XSRETURN_YES;
3762
3763 XSRETURN_NO;
3764}
3765
3766MODULE = Coro::State PACKAGE = Coro::Signal
3767
3768SV *
3769new (SV *klass)
3770 CODE:
3771 RETVAL = sv_bless (
3772 coro_waitarray_new (aTHX_ 0),
3773 GvSTASH (CvGV (cv))
3774 );
3775 OUTPUT:
3776 RETVAL
3777
3778void
3779wait (...)
3780 CODE:
3781 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3782
3783void
3784broadcast (SV *self)
3785 CODE:
3786{
3787 AV *av = (AV *)SvRV (self);
3788 coro_signal_wake (aTHX_ av, AvFILLp (av));
3789}
3790
3791void
3792send (SV *self)
3793 CODE:
3794{
3795 AV *av = (AV *)SvRV (self);
3796
3797 if (AvFILLp (av))
3798 coro_signal_wake (aTHX_ av, 1);
3799 else
3800 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3801}
3802
3803IV
3804awaited (SV *self)
3805 CODE:
3806 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3807 OUTPUT:
3808 RETVAL
3809
3810
3811MODULE = Coro::State PACKAGE = Coro::AnyEvent
3812
3813BOOT:
3814 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3815
3816void
3817_schedule (...)
3818 CODE:
3819{
3820 static int incede;
3821
3822 api_cede_notself (aTHX);
3823
3824 ++incede;
3825 while (coro_nready >= incede && api_cede (aTHX))
3826 ;
3827
3828 sv_setsv (sv_activity, &PL_sv_undef);
3829 if (coro_nready >= incede)
3830 {
3831 PUSHMARK (SP);
3832 PUTBACK;
3833 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3834 }
3835
3836 --incede;
3837}
3838
3839
3840MODULE = Coro::State PACKAGE = Coro::AIO
3841
3842void
3843_register (char *target, char *proto, SV *req)
3844 CODE:
3845{
3846 SV *req_cv = s_get_cv_croak (req);
3847 /* newXSproto doesn't return the CV on 5.8 */
3848 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3849 sv_setpv ((SV *)slf_cv, proto);
3850 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3851}
3852
3853MODULE = Coro::State PACKAGE = Coro::Select
3854
3855void
3856patch_pp_sselect ()
3857 CODE:
3858 if (!coro_old_pp_sselect)
3859 {
3860 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3861 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3862 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3863 }
3864
3865void
3866unpatch_pp_sselect ()
3867 CODE:
3868 if (coro_old_pp_sselect)
3869 {
3870 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3871 coro_old_pp_sselect = 0;
3872 }
3873
3874

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