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Comparing Coro/Coro/State.xs (file contents):
Revision 1.76 by root, Thu Oct 26 08:45:56 2006 UTC vs.
Revision 1.366 by root, Tue Jul 21 03:39:58 2009 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "schmorp.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
12# ifndef PL_ppaddr 14#include <errno.h>
13# define PL_ppaddr ppaddr 15#include <assert.h>
14# endif 16
15# ifndef call_sv 17#ifdef WIN32
16# define call_sv perl_call_sv 18# undef setjmp
17# endif 19# undef longjmp
18# ifndef get_sv 20# undef _exit
19# define get_sv perl_get_sv 21# define setjmp _setjmp /* deep magic */
20# endif 22#else
21# ifndef get_cv 23# include <inttypes.h> /* most portable stdint.h */
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 24#endif
31
32#include <errno.h>
33 25
34#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
35# include <unistd.h> 27# include <unistd.h>
36# include <sys/mman.h> 28# include <sys/mman.h>
37# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
39# define MAP_ANONYMOUS MAP_ANON 31# define MAP_ANONYMOUS MAP_ANON
40# else 32# else
41# undef HAVE_MMAP 33# undef HAVE_MMAP
42# endif 34# endif
43# endif 35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
44#endif 47#endif
45 48
46#define SUB_INIT "Coro::State::initialize" 49#if CORO_USE_VALGRIND
47#define UCORO_STATE "_coro_state" 50# include <valgrind/valgrind.h>
51#endif
48 52
49/* The next macro should declare a variable stacklevel that contains and approximation 53/* the maximum number of idle cctx that will be pooled */
50 * to the current C stack pointer. Its property is that it changes with each call 54static int cctx_max_idle = 4;
51 * and should be unique. */ 55
56#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
57# undef CORO_STACKGUARD
58#endif
59
60#ifndef CORO_STACKGUARD
61# define CORO_STACKGUARD 0
62#endif
63
64/* prefer perl internal functions over our own? */
65#ifndef CORO_PREFER_PERL_FUNCTIONS
66# define CORO_PREFER_PERL_FUNCTIONS 0
67#endif
68
69/* The next macros try to return the current stack pointer, in an as
70 * portable way as possible. */
71#if __GNUC__ >= 4
72# define dSTACKLEVEL int stacklevel_dummy
73# define STACKLEVEL __builtin_frame_address (0)
74#else
75# define dSTACKLEVEL volatile void *stacklevel
52#define dSTACKLEVEL void *stacklevel = &stacklevel 76# define STACKLEVEL ((void *)&stacklevel)
77#endif
53 78
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 79#define IN_DESTRUCT PL_dirty
55 80
56#define labs(l) ((l) >= 0 ? (l) : -(l)) 81#if __GNUC__ >= 3
82# define attribute(x) __attribute__(x)
83# define expect(expr,value) __builtin_expect ((expr), (value))
84# define INLINE static inline
85#else
86# define attribute(x)
87# define expect(expr,value) (expr)
88# define INLINE static
89#endif
90
91#define expect_false(expr) expect ((expr) != 0, 0)
92#define expect_true(expr) expect ((expr) != 0, 1)
93
94#define NOINLINE attribute ((noinline))
57 95
58#include "CoroAPI.h" 96#include "CoroAPI.h"
97#define GCoroAPI (&coroapi) /* very sneaky */
59 98
60#ifdef USE_ITHREADS 99#ifdef USE_ITHREADS
61static perl_mutex coro_mutex; 100# if CORO_PTHREAD
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 101static void *coro_thx;
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 102# endif
64#else
65# define LOCK (void)0
66# define UNLOCK (void)0
67#endif 103#endif
68 104
105#ifdef __linux
106# include <time.h> /* for timespec */
107# include <syscall.h> /* for SYS_* */
108# ifdef SYS_clock_gettime
109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
110# define CORO_CLOCK_MONOTONIC 1
111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
112# endif
113#endif
114
115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
117
118/* we hijack an hopefully unused CV flag for our purposes */
119#define CVf_SLF 0x4000
120static OP *pp_slf (pTHX);
121
122static U32 cctx_gen;
123static size_t cctx_stacksize = CORO_STACKSIZE;
69static struct CoroAPI coroapi; 124static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 125static AV *main_mainstack; /* used to differentiate between $main and others */
126static JMPENV *main_top_env;
71static HV *coro_state_stash; 127static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static SV *coro_mortal; /* will be freed after next transfer */ 128static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
75 129
76/* this is actually not only the c stack but also c registers etc... */ 130static AV *av_destroy; /* destruction queue */
131static SV *sv_manager; /* the manager coro */
132static SV *sv_idle; /* $Coro::idle */
133
134static GV *irsgv; /* $/ */
135static GV *stdoutgv; /* *STDOUT */
136static SV *rv_diehook;
137static SV *rv_warnhook;
138static HV *hv_sig; /* %SIG */
139
140/* async_pool helper stuff */
141static SV *sv_pool_rss;
142static SV *sv_pool_size;
143static SV *sv_async_pool_idle; /* description string */
144static AV *av_async_pool; /* idle pool */
145static SV *sv_Coro; /* class string */
146static CV *cv_pool_handler;
147static CV *cv_coro_state_new;
148
149/* Coro::AnyEvent */
150static SV *sv_activity;
151
152/* enable processtime/realtime profiling */
153static char enable_times;
154typedef U32 coro_ts[2];
155static coro_ts time_real, time_cpu;
156static char times_valid;
157
158static struct coro_cctx *cctx_first;
159static int cctx_count, cctx_idle;
160
161enum {
162 CC_MAPPED = 0x01,
163 CC_NOREUSE = 0x02, /* throw this away after tracing */
164 CC_TRACE = 0x04,
165 CC_TRACE_SUB = 0x08, /* trace sub calls */
166 CC_TRACE_LINE = 0x10, /* trace each statement */
167 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
168};
169
170/* this is a structure representing a c-level coroutine */
77typedef struct { 171typedef struct coro_cctx
78 int refcnt; /* pointer reference counter */ 172{
79 int usecnt; /* shared by how many coroutines */ 173 struct coro_cctx *next;
80 int gencnt; /* generation counter */
81 174
175 /* the stack */
176 void *sptr;
177 size_t ssize;
178
179 /* cpu state */
180 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
181 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
182 JMPENV *top_env;
82 coro_context cctx; 183 coro_context cctx;
83 184
84 void *sptr; 185 U32 gen;
85 long ssize; /* positive == mmap, otherwise malloc */ 186#if CORO_USE_VALGRIND
86} coro_stack; 187 int valgrind_id;
188#endif
189 unsigned char flags;
190} coro_cctx;
87 191
192coro_cctx *cctx_current; /* the currently running cctx */
193
194/*****************************************************************************/
195
196enum {
197 CF_RUNNING = 0x0001, /* coroutine is running */
198 CF_READY = 0x0002, /* coroutine is ready */
199 CF_NEW = 0x0004, /* has never been switched to */
200 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
201 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
202};
203
204/* the structure where most of the perl state is stored, overlaid on the cxstack */
205typedef struct
206{
207 SV *defsv;
208 AV *defav;
209 SV *errsv;
210 SV *irsgv;
211 HV *hinthv;
212#define VAR(name,type) type name;
213# include "state.h"
214#undef VAR
215} perl_slots;
216
217#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
218
219/* this is a structure representing a perl-level coroutine */
88struct coro { 220struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 221 /* the C coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env; 222 coro_cctx *cctx;
91 223
92 /* the optional C context */ 224 /* ready queue */
93 coro_stack *stack; 225 struct coro *next_ready;
94 void *cursp;
95 int gencnt;
96 226
97 /* optionally saved, might be zero */ 227 /* state data */
98 AV *defav; 228 struct CoroSLF slf_frame; /* saved slf frame */
99 SV *defsv;
100 SV *errsv;
101
102 /* saved global state not related to stacks */
103 U8 dowarn;
104 I32 in_eval;
105
106 /* the stacks and related info (callchain etc..) */
107 PERL_SI *curstackinfo;
108 AV *curstack;
109 AV *mainstack; 229 AV *mainstack;
110 SV **stack_sp; 230 perl_slots *slot; /* basically the saved sp */
111 OP *op;
112 SV **curpad;
113 AV *comppad;
114 CV *compcv;
115 SV **stack_base;
116 SV **stack_max;
117 SV **tmps_stack;
118 I32 tmps_floor;
119 I32 tmps_ix;
120 I32 tmps_max;
121 I32 *markstack;
122 I32 *markstack_ptr;
123 I32 *markstack_max;
124 I32 *scopestack;
125 I32 scopestack_ix;
126 I32 scopestack_max;
127 ANY *savestack;
128 I32 savestack_ix;
129 I32 savestack_max;
130 OP **retstack;
131 I32 retstack_ix;
132 I32 retstack_max;
133 PMOP *curpm;
134 COP *curcop;
135 JMPENV *top_env;
136 231
232 CV *startcv; /* the CV to execute */
137 /* data associated with this coroutine (initial args) */ 233 AV *args; /* data associated with this coroutine (initial args) */
138 AV *args; 234 int refcnt; /* coroutines are refcounted, yes */
235 int flags; /* CF_ flags */
236 HV *hv; /* the perl hash associated with this coro, if any */
237 void (*on_destroy)(pTHX_ struct coro *coro);
238
239 /* statistics */
240 int usecount; /* number of transfers to this coro */
241
242 /* coro process data */
243 int prio;
244 SV *except; /* exception to be thrown */
245 SV *rouse_cb;
246
247 /* async_pool */
248 SV *saved_deffh;
249 SV *invoke_cb;
250 AV *invoke_av;
251
252 /* on_enter/on_leave */
253 AV *on_enter;
254 AV *on_leave;
255
256 /* times */
257 coro_ts t_cpu, t_real;
258
259 /* linked list */
260 struct coro *next, *prev;
139}; 261};
140 262
141typedef struct coro *Coro__State; 263typedef struct coro *Coro__State;
142typedef struct coro *Coro__State_or_hashref; 264typedef struct coro *Coro__State_or_hashref;
143 265
144/* mostly copied from op.c:cv_clone2 */ 266/* the following variables are effectively part of the perl context */
145STATIC AV * 267/* and get copied between struct coro and these variables */
146clone_padlist (pTHX_ AV *protopadlist) 268/* the mainr easonw e don't support windows process emulation */
269static struct CoroSLF slf_frame; /* the current slf frame */
270
271/** Coro ********************************************************************/
272
273#define CORO_PRIO_MAX 3
274#define CORO_PRIO_HIGH 1
275#define CORO_PRIO_NORMAL 0
276#define CORO_PRIO_LOW -1
277#define CORO_PRIO_IDLE -3
278#define CORO_PRIO_MIN -4
279
280/* for Coro.pm */
281static SV *coro_current;
282static SV *coro_readyhook;
283static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
284static CV *cv_coro_run, *cv_coro_terminate;
285static struct coro *coro_first;
286#define coro_nready coroapi.nready
287
288/** Coro::Select ************************************************************/
289
290static OP *(*coro_old_pp_sselect) (pTHX);
291static SV *coro_select_select;
292
293/* horrible hack, but if it works... */
294static OP *
295coro_pp_sselect (aTHX)
147{ 296{
148 AV *av; 297 dSP;
149 I32 ix; 298 PUSHMARK (SP - 4); /* fake argument list */
150 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 299 XPUSHs (coro_select_select);
151 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 300 PUTBACK;
152 SV **pname = AvARRAY (protopad_name); 301
153 SV **ppad = AvARRAY (protopad); 302 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
154 I32 fname = AvFILLp (protopad_name); 303 PL_op->op_flags |= OPf_STACKED;
155 I32 fpad = AvFILLp (protopad); 304 PL_op->op_private = 0;
305 return PL_ppaddr [OP_ENTERSUB](aTHX);
306}
307
308/** lowlevel stuff **********************************************************/
309
310static SV *
311coro_get_sv (pTHX_ const char *name, int create)
312{
313#if PERL_VERSION_ATLEAST (5,10,0)
314 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
315 get_sv (name, create);
316#endif
317 return get_sv (name, create);
318}
319
320static AV *
321coro_get_av (pTHX_ const char *name, int create)
322{
323#if PERL_VERSION_ATLEAST (5,10,0)
324 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
325 get_av (name, create);
326#endif
327 return get_av (name, create);
328}
329
330static HV *
331coro_get_hv (pTHX_ const char *name, int create)
332{
333#if PERL_VERSION_ATLEAST (5,10,0)
334 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
335 get_hv (name, create);
336#endif
337 return get_hv (name, create);
338}
339
340INLINE void
341coro_times_update ()
342{
343#ifdef coro_clock_gettime
344 struct timespec ts;
345
346 ts.tv_sec = ts.tv_nsec = 0;
347 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
348 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
349
350 ts.tv_sec = ts.tv_nsec = 0;
351 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
352 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
353#else
354 dTHX;
355 UV tv[2];
356
357 u2time (aTHX_ tv);
358 time_real [0] = tv [0];
359 time_real [1] = tv [1] * 1000;
360#endif
361}
362
363INLINE void
364coro_times_add (struct coro *c)
365{
366 c->t_real [1] += time_real [1];
367 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
368 c->t_real [0] += time_real [0];
369
370 c->t_cpu [1] += time_cpu [1];
371 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
372 c->t_cpu [0] += time_cpu [0];
373}
374
375INLINE void
376coro_times_sub (struct coro *c)
377{
378 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
379 c->t_real [1] -= time_real [1];
380 c->t_real [0] -= time_real [0];
381
382 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
383 c->t_cpu [1] -= time_cpu [1];
384 c->t_cpu [0] -= time_cpu [0];
385}
386
387/*****************************************************************************/
388/* magic glue */
389
390#define CORO_MAGIC_type_cv 26
391#define CORO_MAGIC_type_state PERL_MAGIC_ext
392
393#define CORO_MAGIC_NN(sv, type) \
394 (expect_true (SvMAGIC (sv)->mg_type == type) \
395 ? SvMAGIC (sv) \
396 : mg_find (sv, type))
397
398#define CORO_MAGIC(sv, type) \
399 (expect_true (SvMAGIC (sv)) \
400 ? CORO_MAGIC_NN (sv, type) \
401 : 0)
402
403#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
404#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
405
406INLINE struct coro *
407SvSTATE_ (pTHX_ SV *coro)
408{
409 HV *stash;
410 MAGIC *mg;
411
412 if (SvROK (coro))
413 coro = SvRV (coro);
414
415 if (expect_false (SvTYPE (coro) != SVt_PVHV))
416 croak ("Coro::State object required");
417
418 stash = SvSTASH (coro);
419 if (expect_false (stash != coro_stash && stash != coro_state_stash))
420 {
421 /* very slow, but rare, check */
422 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
423 croak ("Coro::State object required");
424 }
425
426 mg = CORO_MAGIC_state (coro);
427 return (struct coro *)mg->mg_ptr;
428}
429
430#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
431
432/* faster than SvSTATE, but expects a coroutine hv */
433#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
434#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
435
436/*****************************************************************************/
437/* padlist management and caching */
438
439static AV *
440coro_derive_padlist (pTHX_ CV *cv)
441{
442 AV *padlist = CvPADLIST (cv);
156 AV *newpadlist, *newpad_name, *newpad; 443 AV *newpadlist, *newpad;
157 SV **npad;
158
159 newpad_name = newAV ();
160 for (ix = fname; ix >= 0; ix--)
161 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
162
163 newpad = newAV ();
164 av_fill (newpad, AvFILLp (protopad));
165 npad = AvARRAY (newpad);
166 444
167 newpadlist = newAV (); 445 newpadlist = newAV ();
168 AvREAL_off (newpadlist); 446 AvREAL_off (newpadlist);
169 av_store (newpadlist, 0, (SV *) newpad_name); 447#if PERL_VERSION_ATLEAST (5,10,0)
448 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
449#else
450 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
451#endif
452 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
453 --AvFILLp (padlist);
454
455 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
170 av_store (newpadlist, 1, (SV *) newpad); 456 av_store (newpadlist, 1, (SV *)newpad);
171 457
172 av = newAV (); /* will be @_ */ 458 return newpadlist;
173 av_extend (av, 0); 459}
174 av_store (newpad, 0, (SV *) av);
175 AvREIFY_on (av);
176 460
177 for (ix = fpad; ix > 0; ix--) 461static void
462free_padlist (pTHX_ AV *padlist)
463{
464 /* may be during global destruction */
465 if (!IN_DESTRUCT)
178 { 466 {
179 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 467 I32 i = AvFILLp (padlist);
180 468
181 if (namesv && namesv != &PL_sv_undef) 469 while (i > 0) /* special-case index 0 */
182 { 470 {
183 char *name = SvPVX (namesv); /* XXX */ 471 /* we try to be extra-careful here */
472 AV *av = (AV *)AvARRAY (padlist)[i--];
473 I32 j = AvFILLp (av);
184 474
185 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 475 while (j >= 0)
186 { /* lexical from outside? */ 476 SvREFCNT_dec (AvARRAY (av)[j--]);
187 npad[ix] = SvREFCNT_inc (ppad[ix]);
188 }
189 else
190 { /* our own lexical */
191 SV *sv;
192 if (*name == '&')
193 sv = SvREFCNT_inc (ppad[ix]);
194 else if (*name == '@')
195 sv = (SV *) newAV ();
196 else if (*name == '%')
197 sv = (SV *) newHV ();
198 else
199 sv = NEWSV (0, 0);
200 477
201#ifdef SvPADBUSY 478 AvFILLp (av) = -1;
202 if (!SvPADBUSY (sv)) 479 SvREFCNT_dec (av);
203#endif
204 SvPADMY_on (sv);
205
206 npad[ix] = sv;
207 }
208 } 480 }
209 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
210 {
211 npad[ix] = SvREFCNT_inc (ppad[ix]);
212 }
213 else
214 {
215 SV *sv = NEWSV (0, 0);
216 SvPADTMP_on (sv);
217 npad[ix] = sv;
218 }
219 }
220 481
221#if 0 /* return -ENOTUNDERSTOOD */ 482 SvREFCNT_dec (AvARRAY (padlist)[0]);
222 /* Now that vars are all in place, clone nested closures. */
223 483
224 for (ix = fpad; ix > 0; ix--) {
225 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
226 if (namesv
227 && namesv != &PL_sv_undef
228 && !(SvFLAGS(namesv) & SVf_FAKE)
229 && *SvPVX(namesv) == '&'
230 && CvCLONE(ppad[ix]))
231 {
232 CV *kid = cv_clone((CV*)ppad[ix]);
233 SvREFCNT_dec(ppad[ix]);
234 CvCLONE_on(kid);
235 SvPADMY_on(kid);
236 npad[ix] = (SV*)kid;
237 }
238 }
239#endif
240
241 return newpadlist;
242}
243
244STATIC void
245free_padlist (pTHX_ AV *padlist)
246{
247 /* may be during global destruction */
248 if (SvREFCNT (padlist))
249 {
250 I32 i = AvFILLp (padlist); 484 AvFILLp (padlist) = -1;
251 while (i >= 0)
252 {
253 SV **svp = av_fetch (padlist, i--, FALSE);
254 if (svp)
255 {
256 SV *sv;
257 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
258 SvREFCNT_dec (sv);
259
260 SvREFCNT_dec (*svp);
261 }
262 }
263
264 SvREFCNT_dec ((SV*)padlist); 485 SvREFCNT_dec ((SV*)padlist);
265 } 486 }
266} 487}
267 488
268STATIC int 489static int
269coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 490coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
270{ 491{
271 AV *padlist; 492 AV *padlist;
272 AV *av = (AV *)mg->mg_obj; 493 AV *av = (AV *)mg->mg_obj;
494
495 /* perl manages to free our internal AV and _then_ call us */
496 if (IN_DESTRUCT)
497 return 0;
273 498
274 /* casting is fun. */ 499 /* casting is fun. */
275 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 500 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
276 free_padlist (aTHX_ padlist); 501 free_padlist (aTHX_ padlist);
277 502
278 SvREFCNT_dec (av); 503 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
279 504
280 return 0; 505 return 0;
281} 506}
282 507
283#define PERL_MAGIC_coro PERL_MAGIC_ext 508static MGVTBL coro_cv_vtbl = {
284 509 0, 0, 0, 0,
285static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 510 coro_cv_free
511};
286 512
287/* the next two functions merely cache the padlists */ 513/* the next two functions merely cache the padlists */
288STATIC void 514static void
289get_padlist (pTHX_ CV *cv) 515get_padlist (pTHX_ CV *cv)
290{ 516{
291 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 517 MAGIC *mg = CORO_MAGIC_cv (cv);
518 AV *av;
292 519
293 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 520 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
294 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 521 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
295 else 522 else
523 {
524#if CORO_PREFER_PERL_FUNCTIONS
525 /* this is probably cleaner? but also slower! */
526 /* in practise, it seems to be less stable */
527 CV *cp = Perl_cv_clone (aTHX_ cv);
528 CvPADLIST (cv) = CvPADLIST (cp);
529 CvPADLIST (cp) = 0;
530 SvREFCNT_dec (cp);
531#else
296 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 532 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
533#endif
534 }
297} 535}
298 536
299STATIC void 537static void
300put_padlist (pTHX_ CV *cv) 538put_padlist (pTHX_ CV *cv)
301{ 539{
302 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 540 MAGIC *mg = CORO_MAGIC_cv (cv);
541 AV *av;
303 542
304 if (!mg) 543 if (expect_false (!mg))
305 { 544 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
306 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
307 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
308 mg->mg_virtual = &vtbl_coro;
309 mg->mg_obj = (SV *)newAV ();
310 }
311 545
312 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 546 av = (AV *)mg->mg_obj;
313}
314 547
315#define SB do { 548 if (expect_false (AvFILLp (av) >= AvMAX (av)))
316#define SE } while (0) 549 av_extend (av, AvFILLp (av) + 1);
317 550
318#define LOAD(state) load_state(aTHX_ (state)); 551 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
319#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 552}
320 553
321#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 554/** load & save, init *******************************************************/
322 555
323static void 556static void
557on_enterleave_call (pTHX_ SV *cb);
558
559static void
324load_state(pTHX_ Coro__State c) 560load_perl (pTHX_ Coro__State c)
325{ 561{
326 PL_dowarn = c->dowarn; 562 perl_slots *slot = c->slot;
327 PL_in_eval = c->in_eval; 563 c->slot = 0;
328 564
329 PL_curstackinfo = c->curstackinfo;
330 PL_curstack = c->curstack;
331 PL_mainstack = c->mainstack; 565 PL_mainstack = c->mainstack;
332 PL_stack_sp = c->stack_sp;
333 PL_op = c->op;
334 PL_curpad = c->curpad;
335 PL_comppad = c->comppad;
336 PL_compcv = c->compcv;
337 PL_stack_base = c->stack_base;
338 PL_stack_max = c->stack_max;
339 PL_tmps_stack = c->tmps_stack;
340 PL_tmps_floor = c->tmps_floor;
341 PL_tmps_ix = c->tmps_ix;
342 PL_tmps_max = c->tmps_max;
343 PL_markstack = c->markstack;
344 PL_markstack_ptr = c->markstack_ptr;
345 PL_markstack_max = c->markstack_max;
346 PL_scopestack = c->scopestack;
347 PL_scopestack_ix = c->scopestack_ix;
348 PL_scopestack_max = c->scopestack_max;
349 PL_savestack = c->savestack;
350 PL_savestack_ix = c->savestack_ix;
351 PL_savestack_max = c->savestack_max;
352#if PERL_VERSION < 9
353 PL_retstack = c->retstack;
354 PL_retstack_ix = c->retstack_ix;
355 PL_retstack_max = c->retstack_max;
356#endif
357 PL_curpm = c->curpm;
358 PL_curcop = c->curcop;
359 PL_top_env = c->top_env;
360 566
361 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 567 GvSV (PL_defgv) = slot->defsv;
362 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 568 GvAV (PL_defgv) = slot->defav;
363 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 569 GvSV (PL_errgv) = slot->errsv;
570 GvSV (irsgv) = slot->irsgv;
571 GvHV (PL_hintgv) = slot->hinthv;
572
573 #define VAR(name,type) PL_ ## name = slot->name;
574 # include "state.h"
575 #undef VAR
364 576
365 { 577 {
366 dSP; 578 dSP;
579
367 CV *cv; 580 CV *cv;
368 581
369 /* now do the ugly restore mess */ 582 /* now do the ugly restore mess */
370 while ((cv = (CV *)POPs)) 583 while (expect_true (cv = (CV *)POPs))
371 { 584 {
372 AV *padlist = (AV *)POPs;
373
374 if (padlist)
375 {
376 put_padlist (aTHX_ cv); /* mark this padlist as available */ 585 put_padlist (aTHX_ cv); /* mark this padlist as available */
377 CvPADLIST(cv) = padlist; 586 CvDEPTH (cv) = PTR2IV (POPs);
378 } 587 CvPADLIST (cv) = (AV *)POPs;
379
380 ++CvDEPTH(cv);
381 } 588 }
382 589
383 PUTBACK; 590 PUTBACK;
384 } 591 }
385}
386 592
593 slf_frame = c->slf_frame;
594 CORO_THROW = c->except;
595
596 if (expect_false (enable_times))
597 {
598 if (expect_false (!times_valid))
599 coro_times_update ();
600
601 coro_times_sub (c);
602 }
603
604 if (expect_false (c->on_enter))
605 {
606 int i;
607
608 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
609 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
610 }
611}
612
387static void 613static void
388save_state(pTHX_ Coro__State c, int flags) 614save_perl (pTHX_ Coro__State c)
389{ 615{
616 if (expect_false (c->on_leave))
617 {
618 int i;
619
620 for (i = AvFILLp (c->on_leave); i >= 0; --i)
621 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
622 }
623
624 times_valid = 0;
625
626 if (expect_false (enable_times))
627 {
628 coro_times_update (); times_valid = 1;
629 coro_times_add (c);
630 }
631
632 c->except = CORO_THROW;
633 c->slf_frame = slf_frame;
634
390 { 635 {
391 dSP; 636 dSP;
392 I32 cxix = cxstack_ix; 637 I32 cxix = cxstack_ix;
393 PERL_CONTEXT *ccstk = cxstack; 638 PERL_CONTEXT *ccstk = cxstack;
394 PERL_SI *top_si = PL_curstackinfo; 639 PERL_SI *top_si = PL_curstackinfo;
… …
396 /* 641 /*
397 * the worst thing you can imagine happens first - we have to save 642 * the worst thing you can imagine happens first - we have to save
398 * (and reinitialize) all cv's in the whole callchain :( 643 * (and reinitialize) all cv's in the whole callchain :(
399 */ 644 */
400 645
401 PUSHs (Nullsv); 646 XPUSHs (Nullsv);
402 /* this loop was inspired by pp_caller */ 647 /* this loop was inspired by pp_caller */
403 for (;;) 648 for (;;)
404 { 649 {
405 while (cxix >= 0) 650 while (expect_true (cxix >= 0))
406 { 651 {
407 PERL_CONTEXT *cx = &ccstk[cxix--]; 652 PERL_CONTEXT *cx = &ccstk[cxix--];
408 653
409 if (CxTYPE(cx) == CXt_SUB) 654 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
410 { 655 {
411 CV *cv = cx->blk_sub.cv; 656 CV *cv = cx->blk_sub.cv;
657
412 if (CvDEPTH(cv)) 658 if (expect_true (CvDEPTH (cv)))
413 { 659 {
414 EXTEND (SP, CvDEPTH(cv)*2); 660 EXTEND (SP, 3);
415
416 while (--CvDEPTH(cv))
417 {
418 /* this tells the restore code to increment CvDEPTH */
419 PUSHs (Nullsv);
420 PUSHs ((SV *)cv);
421 }
422
423 PUSHs ((SV *)CvPADLIST(cv)); 661 PUSHs ((SV *)CvPADLIST (cv));
662 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
424 PUSHs ((SV *)cv); 663 PUSHs ((SV *)cv);
425 664
665 CvDEPTH (cv) = 0;
426 get_padlist (aTHX_ cv); /* this is a monster */ 666 get_padlist (aTHX_ cv);
427 } 667 }
428 } 668 }
429#ifdef CXt_FORMAT
430 else if (CxTYPE(cx) == CXt_FORMAT)
431 {
432 /* I never used formats, so how should I know how these are implemented? */
433 /* my bold guess is as a simple, plain sub... */
434 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
435 }
436#endif
437 } 669 }
438 670
439 if (top_si->si_type == PERLSI_MAIN) 671 if (expect_true (top_si->si_type == PERLSI_MAIN))
440 break; 672 break;
441 673
442 top_si = top_si->si_prev; 674 top_si = top_si->si_prev;
443 ccstk = top_si->si_cxstack; 675 ccstk = top_si->si_cxstack;
444 cxix = top_si->si_cxix; 676 cxix = top_si->si_cxix;
445 } 677 }
446 678
447 PUTBACK; 679 PUTBACK;
448 } 680 }
449 681
450 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 682 /* allocate some space on the context stack for our purposes */
451 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 683 /* we manually unroll here, as usually 2 slots is enough */
452 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 684 if (SLOT_COUNT >= 1) CXINC;
685 if (SLOT_COUNT >= 2) CXINC;
686 if (SLOT_COUNT >= 3) CXINC;
687 {
688 unsigned int i;
689 for (i = 3; i < SLOT_COUNT; ++i)
690 CXINC;
691 }
692 cxstack_ix -= SLOT_COUNT; /* undo allocation */
453 693
454 c->dowarn = PL_dowarn;
455 c->in_eval = PL_in_eval;
456
457 c->curstackinfo = PL_curstackinfo;
458 c->curstack = PL_curstack;
459 c->mainstack = PL_mainstack; 694 c->mainstack = PL_mainstack;
460 c->stack_sp = PL_stack_sp; 695
461 c->op = PL_op; 696 {
462 c->curpad = PL_curpad; 697 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
463 c->comppad = PL_comppad; 698
464 c->compcv = PL_compcv; 699 slot->defav = GvAV (PL_defgv);
465 c->stack_base = PL_stack_base; 700 slot->defsv = DEFSV;
466 c->stack_max = PL_stack_max; 701 slot->errsv = ERRSV;
467 c->tmps_stack = PL_tmps_stack; 702 slot->irsgv = GvSV (irsgv);
468 c->tmps_floor = PL_tmps_floor; 703 slot->hinthv = GvHV (PL_hintgv);
469 c->tmps_ix = PL_tmps_ix; 704
470 c->tmps_max = PL_tmps_max; 705 #define VAR(name,type) slot->name = PL_ ## name;
471 c->markstack = PL_markstack; 706 # include "state.h"
472 c->markstack_ptr = PL_markstack_ptr; 707 #undef VAR
473 c->markstack_max = PL_markstack_max; 708 }
474 c->scopestack = PL_scopestack;
475 c->scopestack_ix = PL_scopestack_ix;
476 c->scopestack_max = PL_scopestack_max;
477 c->savestack = PL_savestack;
478 c->savestack_ix = PL_savestack_ix;
479 c->savestack_max = PL_savestack_max;
480#if PERL_VERSION < 9
481 c->retstack = PL_retstack;
482 c->retstack_ix = PL_retstack_ix;
483 c->retstack_max = PL_retstack_max;
484#endif
485 c->curpm = PL_curpm;
486 c->curcop = PL_curcop;
487 c->top_env = PL_top_env;
488} 709}
489 710
490/* 711/*
491 * allocate various perl stacks. This is an exact copy 712 * allocate various perl stacks. This is almost an exact copy
492 * of perl.c:init_stacks, except that it uses less memory 713 * of perl.c:init_stacks, except that it uses less memory
493 * on the (sometimes correct) assumption that coroutines do 714 * on the (sometimes correct) assumption that coroutines do
494 * not usually need a lot of stackspace. 715 * not usually need a lot of stackspace.
495 */ 716 */
496STATIC void 717#if CORO_PREFER_PERL_FUNCTIONS
718# define coro_init_stacks(thx) init_stacks ()
719#else
720static void
497coro_init_stacks (pTHX) 721coro_init_stacks (pTHX)
498{ 722{
499 LOCK; 723 PL_curstackinfo = new_stackinfo(32, 8);
500
501 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
502 PL_curstackinfo->si_type = PERLSI_MAIN; 724 PL_curstackinfo->si_type = PERLSI_MAIN;
503 PL_curstack = PL_curstackinfo->si_stack; 725 PL_curstack = PL_curstackinfo->si_stack;
504 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 726 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
505 727
506 PL_stack_base = AvARRAY(PL_curstack); 728 PL_stack_base = AvARRAY(PL_curstack);
507 PL_stack_sp = PL_stack_base; 729 PL_stack_sp = PL_stack_base;
508 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 730 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
509 731
510 New(50,PL_tmps_stack,96,SV*); 732 New(50,PL_tmps_stack,32,SV*);
511 PL_tmps_floor = -1; 733 PL_tmps_floor = -1;
512 PL_tmps_ix = -1; 734 PL_tmps_ix = -1;
513 PL_tmps_max = 96; 735 PL_tmps_max = 32;
514 736
515 New(54,PL_markstack,16,I32); 737 New(54,PL_markstack,16,I32);
516 PL_markstack_ptr = PL_markstack; 738 PL_markstack_ptr = PL_markstack;
517 PL_markstack_max = PL_markstack + 16; 739 PL_markstack_max = PL_markstack + 16;
518 740
519#ifdef SET_MARK_OFFSET 741#ifdef SET_MARK_OFFSET
520 SET_MARK_OFFSET; 742 SET_MARK_OFFSET;
521#endif 743#endif
522 744
523 New(54,PL_scopestack,16,I32); 745 New(54,PL_scopestack,8,I32);
524 PL_scopestack_ix = 0; 746 PL_scopestack_ix = 0;
525 PL_scopestack_max = 16; 747 PL_scopestack_max = 8;
526 748
527 New(54,PL_savestack,96,ANY); 749 New(54,PL_savestack,24,ANY);
528 PL_savestack_ix = 0; 750 PL_savestack_ix = 0;
529 PL_savestack_max = 96; 751 PL_savestack_max = 24;
530 752
531#if PERL_VERSION < 9 753#if !PERL_VERSION_ATLEAST (5,10,0)
532 New(54,PL_retstack,8,OP*); 754 New(54,PL_retstack,4,OP*);
533 PL_retstack_ix = 0; 755 PL_retstack_ix = 0;
534 PL_retstack_max = 8; 756 PL_retstack_max = 4;
535#endif 757#endif
536
537 UNLOCK;
538} 758}
759#endif
539 760
540/* 761/*
541 * destroy the stacks, the callchain etc... 762 * destroy the stacks, the callchain etc...
542 */ 763 */
543STATIC void 764static void
544destroy_stacks(pTHX) 765coro_destruct_stacks (pTHX)
545{ 766{
546 if (!IN_DESTRUCT)
547 {
548 /* is this ugly, I ask? */
549 LEAVE_SCOPE (0);
550
551 /* sure it is, but more important: is it correct?? :/ */
552 FREETMPS;
553
554 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
555 }
556
557 while (PL_curstackinfo->si_next) 767 while (PL_curstackinfo->si_next)
558 PL_curstackinfo = PL_curstackinfo->si_next; 768 PL_curstackinfo = PL_curstackinfo->si_next;
559 769
560 while (PL_curstackinfo) 770 while (PL_curstackinfo)
561 { 771 {
562 PERL_SI *p = PL_curstackinfo->si_prev; 772 PERL_SI *p = PL_curstackinfo->si_prev;
563 773
564 { /*D*//*remove*/
565 dSP;
566 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
567 PUTBACK; /* possibly superfluous */
568 }
569
570 if (!IN_DESTRUCT) 774 if (!IN_DESTRUCT)
571 {
572 dounwind (-1);/*D*//*remove*/
573 SvREFCNT_dec (PL_curstackinfo->si_stack); 775 SvREFCNT_dec (PL_curstackinfo->si_stack);
574 }
575 776
576 Safefree (PL_curstackinfo->si_cxstack); 777 Safefree (PL_curstackinfo->si_cxstack);
577 Safefree (PL_curstackinfo); 778 Safefree (PL_curstackinfo);
578 PL_curstackinfo = p; 779 PL_curstackinfo = p;
579 } 780 }
580 781
581 Safefree (PL_tmps_stack); 782 Safefree (PL_tmps_stack);
582 Safefree (PL_markstack); 783 Safefree (PL_markstack);
583 Safefree (PL_scopestack); 784 Safefree (PL_scopestack);
584 Safefree (PL_savestack); 785 Safefree (PL_savestack);
585#if PERL_VERSION < 9 786#if !PERL_VERSION_ATLEAST (5,10,0)
586 Safefree (PL_retstack); 787 Safefree (PL_retstack);
587#endif 788#endif
588} 789}
589 790
590static void 791#define CORO_RSS \
591allocate_stack (Coro__State ctx, int alloc) 792 rss += sizeof (SYM (curstackinfo)); \
592{ 793 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
593 coro_stack *stack; 794 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
795 rss += SYM (tmps_max) * sizeof (SV *); \
796 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
797 rss += SYM (scopestack_max) * sizeof (I32); \
798 rss += SYM (savestack_max) * sizeof (ANY);
594 799
595 New (0, stack, 1, coro_stack); 800static size_t
801coro_rss (pTHX_ struct coro *coro)
802{
803 size_t rss = sizeof (*coro);
596 804
597 stack->refcnt = 1; 805 if (coro->mainstack)
598 stack->usecnt = 1; 806 {
599 stack->gencnt = ctx->gencnt = 0; 807 if (coro->flags & CF_RUNNING)
600 808 {
601 if (alloc) 809 #define SYM(sym) PL_ ## sym
810 CORO_RSS;
811 #undef SYM
812 }
813 else
814 {
815 #define SYM(sym) coro->slot->sym
816 CORO_RSS;
817 #undef SYM
818 }
602 { 819 }
603#if HAVE_MMAP 820
604 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */ 821 return rss;
605 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 822}
606 if (stack->sptr == (void *)-1) 823
824/** coroutine stack handling ************************************************/
825
826static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
827static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
828static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
829
830/* apparently < 5.8.8 */
831#ifndef MgPV_nolen_const
832#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
833 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
834 (const char*)(mg)->mg_ptr)
607#endif 835#endif
836
837/*
838 * This overrides the default magic get method of %SIG elements.
839 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
840 * and instead of trying to save and restore the hash elements, we just provide
841 * readback here.
842 */
843static int
844coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
845{
846 const char *s = MgPV_nolen_const (mg);
847
848 if (*s == '_')
849 {
850 SV **svp = 0;
851
852 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
853 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
854
855 if (svp)
608 { 856 {
609 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 857 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
610 New (0, stack->sptr, STACKSIZE, long); 858 return 0;
611 } 859 }
612 } 860 }
613 else
614 stack->sptr = 0;
615 861
616 ctx->stack = stack; 862 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
617} 863}
618 864
619static void 865static int
620deallocate_stack (Coro__State ctx) 866coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
621{ 867{
622 coro_stack *stack = ctx->stack; 868 const char *s = MgPV_nolen_const (mg);
623 869
624 ctx->stack = 0; 870 if (*s == '_')
625
626 if (stack)
627 { 871 {
628 if (!--stack->refcnt) 872 SV **svp = 0;
873
874 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
875 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
876
877 if (svp)
629 { 878 {
630#ifdef HAVE_MMAP 879 SV *old = *svp;
631 if (stack->ssize > 0 && stack->sptr) 880 *svp = 0;
632 munmap (stack->sptr, stack->ssize); 881 SvREFCNT_dec (old);
633 else 882 return 0;
634#endif
635 Safefree (stack->sptr);
636
637 Safefree (stack);
638 } 883 }
639 else if (ctx->gencnt == stack->gencnt) 884 }
640 --stack->usecnt; 885
886 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
887}
888
889static int
890coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
891{
892 const char *s = MgPV_nolen_const (mg);
893
894 if (*s == '_')
641 } 895 {
642} 896 SV **svp = 0;
643 897
898 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
899 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
900
901 if (svp)
902 {
903 SV *old = *svp;
904 *svp = SvOK (sv) ? newSVsv (sv) : 0;
905 SvREFCNT_dec (old);
906 return 0;
907 }
908 }
909
910 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
911}
912
913static void
914prepare_nop (pTHX_ struct coro_transfer_args *ta)
915{
916 /* kind of mega-hacky, but works */
917 ta->next = ta->prev = (struct coro *)ta;
918}
919
644static void 920static int
645setup_coro (void *arg) 921slf_check_nop (pTHX_ struct CoroSLF *frame)
922{
923 return 0;
924}
925
926static int
927slf_check_repeat (pTHX_ struct CoroSLF *frame)
928{
929 return 1;
930}
931
932static UNOP coro_setup_op;
933
934static void NOINLINE /* noinline to keep it out of the transfer fast path */
935coro_setup (pTHX_ struct coro *coro)
646{ 936{
647 /* 937 /*
648 * emulate part of the perl startup here. 938 * emulate part of the perl startup here.
649 */ 939 */
940 coro_init_stacks (aTHX);
941
942 PL_runops = RUNOPS_DEFAULT;
943 PL_curcop = &PL_compiling;
944 PL_in_eval = EVAL_NULL;
945 PL_comppad = 0;
946 PL_comppad_name = 0;
947 PL_comppad_name_fill = 0;
948 PL_comppad_name_floor = 0;
949 PL_curpm = 0;
950 PL_curpad = 0;
951 PL_localizing = 0;
952 PL_dirty = 0;
953 PL_restartop = 0;
954#if PERL_VERSION_ATLEAST (5,10,0)
955 PL_parser = 0;
956#endif
957 PL_hints = 0;
958
959 /* recreate the die/warn hooks */
960 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
961 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
962
963 GvSV (PL_defgv) = newSV (0);
964 GvAV (PL_defgv) = coro->args; coro->args = 0;
965 GvSV (PL_errgv) = newSV (0);
966 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
967 GvHV (PL_hintgv) = 0;
968 PL_rs = newSVsv (GvSV (irsgv));
969 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
970
971 {
972 dSP;
973 UNOP myop;
974
975 Zero (&myop, 1, UNOP);
976 myop.op_next = Nullop;
977 myop.op_type = OP_ENTERSUB;
978 myop.op_flags = OPf_WANT_VOID;
979
980 PUSHMARK (SP);
981 PUSHs ((SV *)coro->startcv);
982 PUTBACK;
983 PL_op = (OP *)&myop;
984 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
985 }
986
987 /* this newly created coroutine might be run on an existing cctx which most
988 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
989 */
990 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
991 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
992
993 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
994 coro_setup_op.op_next = PL_op;
995 coro_setup_op.op_type = OP_ENTERSUB;
996 coro_setup_op.op_ppaddr = pp_slf;
997 /* no flags etc. required, as an init function won't be called */
998
999 PL_op = (OP *)&coro_setup_op;
1000
1001 /* copy throw, in case it was set before coro_setup */
1002 CORO_THROW = coro->except;
1003
1004 if (expect_false (enable_times))
1005 {
1006 coro_times_update ();
1007 coro_times_sub (coro);
1008 }
1009}
1010
1011static void
1012coro_unwind_stacks (pTHX)
1013{
1014 if (!IN_DESTRUCT)
1015 {
1016 /* restore all saved variables and stuff */
1017 LEAVE_SCOPE (0);
1018 assert (PL_tmps_floor == -1);
1019
1020 /* free all temporaries */
1021 FREETMPS;
1022 assert (PL_tmps_ix == -1);
1023
1024 /* unwind all extra stacks */
1025 POPSTACK_TO (PL_mainstack);
1026
1027 /* unwind main stack */
1028 dounwind (-1);
1029 }
1030}
1031
1032static void
1033coro_destruct_perl (pTHX_ struct coro *coro)
1034{
1035 SV *svf [9];
1036
1037 {
1038 struct coro *current = SvSTATE_current;
1039
1040 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1041
1042 save_perl (aTHX_ current);
1043 load_perl (aTHX_ coro);
1044
1045 coro_unwind_stacks (aTHX);
1046 coro_destruct_stacks (aTHX);
1047
1048 // now save some sv's to be free'd later
1049 svf [0] = GvSV (PL_defgv);
1050 svf [1] = (SV *)GvAV (PL_defgv);
1051 svf [2] = GvSV (PL_errgv);
1052 svf [3] = (SV *)PL_defoutgv;
1053 svf [4] = PL_rs;
1054 svf [5] = GvSV (irsgv);
1055 svf [6] = (SV *)GvHV (PL_hintgv);
1056 svf [7] = PL_diehook;
1057 svf [8] = PL_warnhook;
1058 assert (9 == sizeof (svf) / sizeof (*svf));
1059
1060 load_perl (aTHX_ current);
1061 }
1062
1063 {
1064 unsigned int i;
1065
1066 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1067 SvREFCNT_dec (svf [i]);
1068
1069 SvREFCNT_dec (coro->saved_deffh);
1070 SvREFCNT_dec (coro->rouse_cb);
1071 SvREFCNT_dec (coro->invoke_cb);
1072 SvREFCNT_dec (coro->invoke_av);
1073 }
1074}
1075
1076INLINE void
1077free_coro_mortal (pTHX)
1078{
1079 if (expect_true (coro_mortal))
1080 {
1081 SvREFCNT_dec (coro_mortal);
1082 coro_mortal = 0;
1083 }
1084}
1085
1086static int
1087runops_trace (pTHX)
1088{
1089 COP *oldcop = 0;
1090 int oldcxix = -2;
1091
1092 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1093 {
1094 PERL_ASYNC_CHECK ();
1095
1096 if (cctx_current->flags & CC_TRACE_ALL)
1097 {
1098 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1099 {
1100 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1101 SV **bot, **top;
1102 AV *av = newAV (); /* return values */
1103 SV **cb;
1104 dSP;
1105
1106 GV *gv = CvGV (cx->blk_sub.cv);
1107 SV *fullname = sv_2mortal (newSV (0));
1108 if (isGV (gv))
1109 gv_efullname3 (fullname, gv, 0);
1110
1111 bot = PL_stack_base + cx->blk_oldsp + 1;
1112 top = cx->blk_gimme == G_ARRAY ? SP + 1
1113 : cx->blk_gimme == G_SCALAR ? bot + 1
1114 : bot;
1115
1116 av_extend (av, top - bot);
1117 while (bot < top)
1118 av_push (av, SvREFCNT_inc_NN (*bot++));
1119
1120 PL_runops = RUNOPS_DEFAULT;
1121 ENTER;
1122 SAVETMPS;
1123 EXTEND (SP, 3);
1124 PUSHMARK (SP);
1125 PUSHs (&PL_sv_no);
1126 PUSHs (fullname);
1127 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1128 PUTBACK;
1129 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1130 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1131 SPAGAIN;
1132 FREETMPS;
1133 LEAVE;
1134 PL_runops = runops_trace;
1135 }
1136
1137 if (oldcop != PL_curcop)
1138 {
1139 oldcop = PL_curcop;
1140
1141 if (PL_curcop != &PL_compiling)
1142 {
1143 SV **cb;
1144
1145 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1146 {
1147 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1148
1149 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1150 {
1151 dSP;
1152 GV *gv = CvGV (cx->blk_sub.cv);
1153 SV *fullname = sv_2mortal (newSV (0));
1154
1155 if (isGV (gv))
1156 gv_efullname3 (fullname, gv, 0);
1157
1158 PL_runops = RUNOPS_DEFAULT;
1159 ENTER;
1160 SAVETMPS;
1161 EXTEND (SP, 3);
1162 PUSHMARK (SP);
1163 PUSHs (&PL_sv_yes);
1164 PUSHs (fullname);
1165 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1166 PUTBACK;
1167 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1168 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1169 SPAGAIN;
1170 FREETMPS;
1171 LEAVE;
1172 PL_runops = runops_trace;
1173 }
1174
1175 oldcxix = cxstack_ix;
1176 }
1177
1178 if (cctx_current->flags & CC_TRACE_LINE)
1179 {
1180 dSP;
1181
1182 PL_runops = RUNOPS_DEFAULT;
1183 ENTER;
1184 SAVETMPS;
1185 EXTEND (SP, 3);
1186 PL_runops = RUNOPS_DEFAULT;
1187 PUSHMARK (SP);
1188 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1189 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1190 PUTBACK;
1191 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1192 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1193 SPAGAIN;
1194 FREETMPS;
1195 LEAVE;
1196 PL_runops = runops_trace;
1197 }
1198 }
1199 }
1200 }
1201 }
1202
1203 TAINT_NOT;
1204 return 0;
1205}
1206
1207static struct CoroSLF cctx_ssl_frame;
1208
1209static void
1210slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1211{
1212 ta->prev = 0;
1213}
1214
1215static int
1216slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1217{
1218 *frame = cctx_ssl_frame;
1219
1220 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1221}
1222
1223/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1224static void NOINLINE
1225cctx_prepare (pTHX)
1226{
1227 PL_top_env = &PL_start_env;
1228
1229 if (cctx_current->flags & CC_TRACE)
1230 PL_runops = runops_trace;
1231
1232 /* we already must be executing an SLF op, there is no other valid way
1233 * that can lead to creation of a new cctx */
1234 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1235 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1236
1237 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1238 cctx_ssl_frame = slf_frame;
1239
1240 slf_frame.prepare = slf_prepare_set_stacklevel;
1241 slf_frame.check = slf_check_set_stacklevel;
1242}
1243
1244/* the tail of transfer: execute stuff we can only do after a transfer */
1245INLINE void
1246transfer_tail (pTHX)
1247{
1248 free_coro_mortal (aTHX);
1249}
1250
1251/*
1252 * this is a _very_ stripped down perl interpreter ;)
1253 */
1254static void
1255cctx_run (void *arg)
1256{
1257#ifdef USE_ITHREADS
1258# if CORO_PTHREAD
1259 PERL_SET_CONTEXT (coro_thx);
1260# endif
1261#endif
1262 {
1263 dTHX;
1264
1265 /* normally we would need to skip the entersub here */
1266 /* not doing so will re-execute it, which is exactly what we want */
1267 /* PL_nop = PL_nop->op_next */
1268
1269 /* inject a fake subroutine call to cctx_init */
1270 cctx_prepare (aTHX);
1271
1272 /* cctx_run is the alternative tail of transfer() */
1273 transfer_tail (aTHX);
1274
1275 /* somebody or something will hit me for both perl_run and PL_restartop */
1276 PL_restartop = PL_op;
1277 perl_run (PL_curinterp);
1278 /*
1279 * Unfortunately, there is no way to get at the return values of the
1280 * coro body here, as perl_run destroys these
1281 */
1282
1283 /*
1284 * If perl-run returns we assume exit() was being called or the coro
1285 * fell off the end, which seems to be the only valid (non-bug)
1286 * reason for perl_run to return. We try to exit by jumping to the
1287 * bootstrap-time "top" top_env, as we cannot restore the "main"
1288 * coroutine as Coro has no such concept.
1289 * This actually isn't valid with the pthread backend, but OSes requiring
1290 * that backend are too broken to do it in a standards-compliant way.
1291 */
1292 PL_top_env = main_top_env;
1293 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1294 }
1295}
1296
1297static coro_cctx *
1298cctx_new ()
1299{
1300 coro_cctx *cctx;
1301
1302 ++cctx_count;
1303 New (0, cctx, 1, coro_cctx);
1304
1305 cctx->gen = cctx_gen;
1306 cctx->flags = 0;
1307 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1308
1309 return cctx;
1310}
1311
1312/* create a new cctx only suitable as source */
1313static coro_cctx *
1314cctx_new_empty ()
1315{
1316 coro_cctx *cctx = cctx_new ();
1317
1318 cctx->sptr = 0;
1319 coro_create (&cctx->cctx, 0, 0, 0, 0);
1320
1321 return cctx;
1322}
1323
1324/* create a new cctx suitable as destination/running a perl interpreter */
1325static coro_cctx *
1326cctx_new_run ()
1327{
1328 coro_cctx *cctx = cctx_new ();
1329 void *stack_start;
1330 size_t stack_size;
1331
1332#if HAVE_MMAP
1333 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1334 /* mmap supposedly does allocate-on-write for us */
1335 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1336
1337 if (cctx->sptr != (void *)-1)
1338 {
1339 #if CORO_STACKGUARD
1340 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1341 #endif
1342 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1343 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1344 cctx->flags |= CC_MAPPED;
1345 }
1346 else
1347#endif
1348 {
1349 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1350 New (0, cctx->sptr, cctx_stacksize, long);
1351
1352 if (!cctx->sptr)
1353 {
1354 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1355 _exit (EXIT_FAILURE);
1356 }
1357
1358 stack_start = cctx->sptr;
1359 stack_size = cctx->ssize;
1360 }
1361
1362 #if CORO_USE_VALGRIND
1363 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1364 #endif
1365
1366 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1367
1368 return cctx;
1369}
1370
1371static void
1372cctx_destroy (coro_cctx *cctx)
1373{
1374 if (!cctx)
1375 return;
1376
1377 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1378
1379 --cctx_count;
1380 coro_destroy (&cctx->cctx);
1381
1382 /* coro_transfer creates new, empty cctx's */
1383 if (cctx->sptr)
1384 {
1385 #if CORO_USE_VALGRIND
1386 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1387 #endif
1388
1389#if HAVE_MMAP
1390 if (cctx->flags & CC_MAPPED)
1391 munmap (cctx->sptr, cctx->ssize);
1392 else
1393#endif
1394 Safefree (cctx->sptr);
1395 }
1396
1397 Safefree (cctx);
1398}
1399
1400/* wether this cctx should be destructed */
1401#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1402
1403static coro_cctx *
1404cctx_get (pTHX)
1405{
1406 while (expect_true (cctx_first))
1407 {
1408 coro_cctx *cctx = cctx_first;
1409 cctx_first = cctx->next;
1410 --cctx_idle;
1411
1412 if (expect_true (!CCTX_EXPIRED (cctx)))
1413 return cctx;
1414
1415 cctx_destroy (cctx);
1416 }
1417
1418 return cctx_new_run ();
1419}
1420
1421static void
1422cctx_put (coro_cctx *cctx)
1423{
1424 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1425
1426 /* free another cctx if overlimit */
1427 if (expect_false (cctx_idle >= cctx_max_idle))
1428 {
1429 coro_cctx *first = cctx_first;
1430 cctx_first = first->next;
1431 --cctx_idle;
1432
1433 cctx_destroy (first);
1434 }
1435
1436 ++cctx_idle;
1437 cctx->next = cctx_first;
1438 cctx_first = cctx;
1439}
1440
1441/** coroutine switching *****************************************************/
1442
1443static void
1444transfer_check (pTHX_ struct coro *prev, struct coro *next)
1445{
1446 /* TODO: throwing up here is considered harmful */
1447
1448 if (expect_true (prev != next))
1449 {
1450 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1451 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1452
1453 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1454 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1455
1456#if !PERL_VERSION_ATLEAST (5,10,0)
1457 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1458 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1459#endif
1460 }
1461}
1462
1463/* always use the TRANSFER macro */
1464static void NOINLINE /* noinline so we have a fixed stackframe */
1465transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1466{
1467 dSTACKLEVEL;
1468
1469 /* sometimes transfer is only called to set idle_sp */
1470 if (expect_false (!prev))
1471 {
1472 cctx_current->idle_sp = STACKLEVEL;
1473 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1474 }
1475 else if (expect_true (prev != next))
1476 {
1477 coro_cctx *cctx_prev;
1478
1479 if (expect_false (prev->flags & CF_NEW))
1480 {
1481 /* create a new empty/source context */
1482 prev->flags &= ~CF_NEW;
1483 prev->flags |= CF_RUNNING;
1484 }
1485
1486 prev->flags &= ~CF_RUNNING;
1487 next->flags |= CF_RUNNING;
1488
1489 /* first get rid of the old state */
1490 save_perl (aTHX_ prev);
1491
1492 if (expect_false (next->flags & CF_NEW))
1493 {
1494 /* need to start coroutine */
1495 next->flags &= ~CF_NEW;
1496 /* setup coroutine call */
1497 coro_setup (aTHX_ next);
1498 }
1499 else
1500 load_perl (aTHX_ next);
1501
1502 /* possibly untie and reuse the cctx */
1503 if (expect_true (
1504 cctx_current->idle_sp == STACKLEVEL
1505 && !(cctx_current->flags & CC_TRACE)
1506 && !force_cctx
1507 ))
1508 {
1509 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1510 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1511
1512 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1513 /* without this the next cctx_get might destroy the running cctx while still in use */
1514 if (expect_false (CCTX_EXPIRED (cctx_current)))
1515 if (expect_true (!next->cctx))
1516 next->cctx = cctx_get (aTHX);
1517
1518 cctx_put (cctx_current);
1519 }
1520 else
1521 prev->cctx = cctx_current;
1522
1523 ++next->usecount;
1524
1525 cctx_prev = cctx_current;
1526 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1527
1528 next->cctx = 0;
1529
1530 if (expect_false (cctx_prev != cctx_current))
1531 {
1532 cctx_prev->top_env = PL_top_env;
1533 PL_top_env = cctx_current->top_env;
1534 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1535 }
1536
1537 transfer_tail (aTHX);
1538 }
1539}
1540
1541#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1542#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1543
1544/** high level stuff ********************************************************/
1545
1546static int
1547coro_state_destroy (pTHX_ struct coro *coro)
1548{
1549 if (coro->flags & CF_DESTROYED)
1550 return 0;
1551
1552 if (coro->on_destroy && !PL_dirty)
1553 coro->on_destroy (aTHX_ coro);
1554
1555 coro->flags |= CF_DESTROYED;
1556
1557 if (coro->flags & CF_READY)
1558 {
1559 /* reduce nready, as destroying a ready coro effectively unreadies it */
1560 /* alternative: look through all ready queues and remove the coro */
1561 --coro_nready;
1562 }
1563 else
1564 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1565
1566 if (coro->mainstack
1567 && coro->mainstack != main_mainstack
1568 && coro->slot
1569 && !PL_dirty)
1570 coro_destruct_perl (aTHX_ coro);
1571
1572 cctx_destroy (coro->cctx);
1573 SvREFCNT_dec (coro->startcv);
1574 SvREFCNT_dec (coro->args);
1575 SvREFCNT_dec (CORO_THROW);
1576
1577 if (coro->next) coro->next->prev = coro->prev;
1578 if (coro->prev) coro->prev->next = coro->next;
1579 if (coro == coro_first) coro_first = coro->next;
1580
1581 return 1;
1582}
1583
1584static int
1585coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1586{
1587 struct coro *coro = (struct coro *)mg->mg_ptr;
1588 mg->mg_ptr = 0;
1589
1590 coro->hv = 0;
1591
1592 if (--coro->refcnt < 0)
1593 {
1594 coro_state_destroy (aTHX_ coro);
1595 Safefree (coro);
1596 }
1597
1598 return 0;
1599}
1600
1601static int
1602coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1603{
1604 struct coro *coro = (struct coro *)mg->mg_ptr;
1605
1606 ++coro->refcnt;
1607
1608 return 0;
1609}
1610
1611static MGVTBL coro_state_vtbl = {
1612 0, 0, 0, 0,
1613 coro_state_free,
1614 0,
1615#ifdef MGf_DUP
1616 coro_state_dup,
1617#else
1618# define MGf_DUP 0
1619#endif
1620};
1621
1622static void
1623prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1624{
1625 ta->prev = SvSTATE (prev_sv);
1626 ta->next = SvSTATE (next_sv);
1627 TRANSFER_CHECK (*ta);
1628}
1629
1630static void
1631api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1632{
1633 struct coro_transfer_args ta;
1634
1635 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1636 TRANSFER (ta, 1);
1637}
1638
1639/** Coro ********************************************************************/
1640
1641INLINE void
1642coro_enq (pTHX_ struct coro *coro)
1643{
1644 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1645
1646 SvREFCNT_inc_NN (coro->hv);
1647
1648 coro->next_ready = 0;
1649 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1650 ready [1] = coro;
1651}
1652
1653INLINE struct coro *
1654coro_deq (pTHX)
1655{
1656 int prio;
1657
1658 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1659 {
1660 struct coro **ready = coro_ready [prio];
1661
1662 if (ready [0])
1663 {
1664 struct coro *coro = ready [0];
1665 ready [0] = coro->next_ready;
1666 return coro;
1667 }
1668 }
1669
1670 return 0;
1671}
1672
1673static void
1674invoke_sv_ready_hook_helper (void)
1675{
650 dTHX; 1676 dTHX;
651 dSP; 1677 dSP;
652 Coro__State ctx = (Coro__State)arg;
653 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654 1678
655 coro_init_stacks (aTHX); 1679 ENTER;
656 /*PL_curcop = 0;*/ 1680 SAVETMPS;
657 /*PL_in_eval = PL_in_eval;*/ /* inherit */
658 SvREFCNT_dec (GvAV (PL_defgv));
659 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
660 1681
661 SPAGAIN;
662
663 if (ctx->stack)
664 {
665 ctx->cursp = 0;
666
667 PUSHMARK(SP); 1682 PUSHMARK (SP);
668 PUTBACK; 1683 PUTBACK;
669 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1684 call_sv (coro_readyhook, G_VOID | G_DISCARD);
670 1685
671 if (SvTRUE (ERRSV)) 1686 FREETMPS;
672 croak (NULL); 1687 LEAVE;
673 else 1688}
674 croak ("FATAL: CCTXT coroutine returned!"); 1689
1690static int
1691api_ready (pTHX_ SV *coro_sv)
1692{
1693 struct coro *coro = SvSTATE (coro_sv);
1694
1695 if (coro->flags & CF_READY)
1696 return 0;
1697
1698 coro->flags |= CF_READY;
1699
1700 coro_enq (aTHX_ coro);
1701
1702 if (!coro_nready++)
1703 if (coroapi.readyhook)
1704 coroapi.readyhook ();
1705
1706 return 1;
1707}
1708
1709static int
1710api_is_ready (pTHX_ SV *coro_sv)
1711{
1712 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1713}
1714
1715/* expects to own a reference to next->hv */
1716INLINE void
1717prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1718{
1719 SV *prev_sv = SvRV (coro_current);
1720
1721 ta->prev = SvSTATE_hv (prev_sv);
1722 ta->next = next;
1723
1724 TRANSFER_CHECK (*ta);
1725
1726 SvRV_set (coro_current, (SV *)next->hv);
1727
1728 free_coro_mortal (aTHX);
1729 coro_mortal = prev_sv;
1730}
1731
1732static void
1733prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1734{
1735 for (;;)
675 } 1736 {
676 else 1737 struct coro *next = coro_deq (aTHX);
677 {
678 UNOP myop;
679 1738
680 PL_op = (OP *)&myop; 1739 if (expect_true (next))
681
682 Zero(&myop, 1, UNOP);
683 myop.op_next = Nullop;
684 myop.op_flags = OPf_WANT_VOID;
685
686 PUSHMARK(SP);
687 XPUSHs (sub_init);
688 /*
689 * the next line is slightly wrong, as PL_op->op_next
690 * is actually being executed so we skip the first op.
691 * that doesn't matter, though, since it is only
692 * pp_nextstate and we never return...
693 * ah yes, and I don't care anyways ;)
694 */
695 PUTBACK;
696 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697 SPAGAIN;
698
699 ENTER; /* necessary e.g. for dounwind */
700 }
701}
702
703static void
704continue_coro (void *arg)
705{
706 /*
707 * this is a _very_ stripped down perl interpreter ;)
708 */
709 dTHX;
710 Coro__State ctx = (Coro__State)arg;
711
712 PL_top_env = &ctx->start_env;
713
714 ctx->cursp = 0;
715 PL_op = PL_op->op_next;
716 CALLRUNOPS(aTHX);
717
718 abort ();
719}
720
721STATIC void
722transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
723{
724 dSTACKLEVEL;
725
726 if (prev != next)
727 {
728 if (next->mainstack)
729 { 1740 {
730 LOCK; 1741 /* cannot transfer to destroyed coros, skip and look for next */
731 SAVE (prev, flags); 1742 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
732 LOAD (next); 1743 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
733 UNLOCK; 1744 else
734
735 /* mark this state as in-use */
736 next->mainstack = 0;
737 next->tmps_ix = -2;
738
739 /* stacklevel changed? if yes, grab the stack for us! */
740 if (flags & TRANSFER_SAVE_CCTXT)
741 { 1745 {
742 if (!prev->stack) 1746 next->flags &= ~CF_READY;
743 allocate_stack (prev, 0); 1747 --coro_nready;
744 else if (prev->cursp != stacklevel 1748
745 && prev->stack->usecnt > 1) 1749 prepare_schedule_to (aTHX_ ta, next);
746 { 1750 break;
747 prev->gencnt = ++prev->stack->gencnt;
748 prev->stack->usecnt = 1;
749 }
750
751 /* has our stack been invalidated? */
752 if (next->stack && next->stack->gencnt != next->gencnt)
753 {
754 deallocate_stack (next);
755 allocate_stack (next, 1);
756 coro_create (&(next->stack->cctx),
757 continue_coro, (void *)next,
758 next->stack->sptr, labs (next->stack->ssize));
759 }
760
761 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
762 prev->cursp = stacklevel;
763 /* don't add any code here */
764 } 1751 }
765 else
766 next->cursp = stacklevel;
767 } 1752 }
768 else if (next->tmps_ix == -2)
769 croak ("tried to transfer to running coroutine");
770 else 1753 else
771 { 1754 {
772 LOCK; 1755 /* nothing to schedule: call the idle handler */
773 SAVE (prev, -1); /* first get rid of the old state */ 1756 if (SvROK (sv_idle)
774 UNLOCK; 1757 && SvOBJECT (SvRV (sv_idle)))
775
776 if (flags & TRANSFER_SAVE_CCTXT)
777 { 1758 {
778 if (!prev->stack) 1759 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
779 allocate_stack (prev, 0); 1760 api_ready (aTHX_ SvRV (sv_idle));
780 1761 --coro_nready;
781 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
782 {
783 PL_top_env = &next->start_env;
784
785 setup_coro (next);
786 next->cursp = stacklevel;
787
788 prev->stack->refcnt++;
789 prev->stack->usecnt++;
790 next->stack = prev->stack;
791 next->gencnt = prev->gencnt;
792 }
793 else
794 {
795 assert (!next->stack);
796 allocate_stack (next, 1);
797 coro_create (&(next->stack->cctx),
798 setup_coro, (void *)next,
799 next->stack->sptr, labs (next->stack->ssize));
800 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
801 prev->cursp = stacklevel;
802 /* don't add any code here */
803 }
804 } 1762 }
805 else 1763 else
806 { 1764 {
807 setup_coro (next); 1765 dSP;
808 next->cursp = stacklevel; 1766
1767 ENTER;
1768 SAVETMPS;
1769
1770 PUSHMARK (SP);
1771 PUTBACK;
1772 call_sv (sv_idle, G_VOID | G_DISCARD);
1773
1774 FREETMPS;
1775 LEAVE;
809 } 1776 }
810 } 1777 }
811 } 1778 }
1779}
812 1780
813 LOCK; 1781INLINE void
1782prepare_cede (pTHX_ struct coro_transfer_args *ta)
1783{
1784 api_ready (aTHX_ coro_current);
1785 prepare_schedule (aTHX_ ta);
1786}
1787
1788INLINE void
1789prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1790{
1791 SV *prev = SvRV (coro_current);
1792
814 if (coro_mortal) 1793 if (coro_nready)
815 {
816 SvREFCNT_dec (coro_mortal);
817 coro_mortal = 0;
818 } 1794 {
819 UNLOCK; 1795 prepare_schedule (aTHX_ ta);
1796 api_ready (aTHX_ prev);
1797 }
1798 else
1799 prepare_nop (aTHX_ ta);
820} 1800}
821 1801
822#define SV_CORO(sv,func) \ 1802static void
823 do { \ 1803api_schedule (pTHX)
824 if (SvROK (sv)) \ 1804{
825 sv = SvRV (sv); \ 1805 struct coro_transfer_args ta;
826 \
827 if (SvTYPE (sv) == SVt_PVHV) \
828 { \
829 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
830 \
831 if (!he) \
832 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
833 \
834 (sv) = SvRV (HeVAL(he)); \
835 } \
836 \
837 /* must also be changed inside Coro::Cont::yield */ \
838 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
839 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
840 \
841 } while(0)
842 1806
843#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv)) 1807 prepare_schedule (aTHX_ &ta);
1808 TRANSFER (ta, 1);
1809}
844 1810
1811static void
1812api_schedule_to (pTHX_ SV *coro_sv)
1813{
1814 struct coro_transfer_args ta;
1815 struct coro *next = SvSTATE (coro_sv);
1816
1817 SvREFCNT_inc_NN (coro_sv);
1818 prepare_schedule_to (aTHX_ &ta, next);
1819}
1820
845static void 1821static int
846api_transfer(pTHX_ SV *prev, SV *next, int flags) 1822api_cede (pTHX)
847{ 1823{
848 SV_CORO (prev, "Coro::transfer"); 1824 struct coro_transfer_args ta;
849 SV_CORO (next, "Coro::transfer");
850 1825
851 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1826 prepare_cede (aTHX_ &ta);
852}
853 1827
1828 if (expect_true (ta.prev != ta.next))
1829 {
1830 TRANSFER (ta, 1);
1831 return 1;
1832 }
1833 else
1834 return 0;
1835}
1836
1837static int
1838api_cede_notself (pTHX)
1839{
1840 if (coro_nready)
1841 {
1842 struct coro_transfer_args ta;
1843
1844 prepare_cede_notself (aTHX_ &ta);
1845 TRANSFER (ta, 1);
1846 return 1;
1847 }
1848 else
1849 return 0;
1850}
1851
1852static void
1853api_trace (pTHX_ SV *coro_sv, int flags)
1854{
1855 struct coro *coro = SvSTATE (coro_sv);
1856
1857 if (coro->flags & CF_RUNNING)
1858 croak ("cannot enable tracing on a running coroutine, caught");
1859
1860 if (flags & CC_TRACE)
1861 {
1862 if (!coro->cctx)
1863 coro->cctx = cctx_new_run ();
1864 else if (!(coro->cctx->flags & CC_TRACE))
1865 croak ("cannot enable tracing on coroutine with custom stack, caught");
1866
1867 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1868 }
1869 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1870 {
1871 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1872
1873 if (coro->flags & CF_RUNNING)
1874 PL_runops = RUNOPS_DEFAULT;
1875 else
1876 coro->slot->runops = RUNOPS_DEFAULT;
1877 }
1878}
1879
1880static void
1881coro_call_on_destroy (pTHX_ struct coro *coro)
1882{
1883 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1884 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1885
1886 if (on_destroyp)
1887 {
1888 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1889
1890 while (AvFILLp (on_destroy) >= 0)
1891 {
1892 dSP; /* don't disturb outer sp */
1893 SV *cb = av_pop (on_destroy);
1894
1895 PUSHMARK (SP);
1896
1897 if (statusp)
1898 {
1899 int i;
1900 AV *status = (AV *)SvRV (*statusp);
1901 EXTEND (SP, AvFILLp (status) + 1);
1902
1903 for (i = 0; i <= AvFILLp (status); ++i)
1904 PUSHs (AvARRAY (status)[i]);
1905 }
1906
1907 PUTBACK;
1908 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1909 }
1910 }
1911}
1912
1913static void
1914slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1915{
1916 int i;
1917 HV *hv = (HV *)SvRV (coro_current);
1918 AV *av = newAV ();
1919
1920 av_extend (av, items - 1);
1921 for (i = 0; i < items; ++i)
1922 av_push (av, SvREFCNT_inc_NN (arg [i]));
1923
1924 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1925
1926 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1927 api_ready (aTHX_ sv_manager);
1928
1929 frame->prepare = prepare_schedule;
1930 frame->check = slf_check_repeat;
1931
1932 /* as a minor optimisation, we could unwind all stacks here */
1933 /* but that puts extra pressure on pp_slf, and is not worth much */
1934 /*coro_unwind_stacks (aTHX);*/
1935}
1936
854/** Coro ********************************************************************/ 1937/*****************************************************************************/
1938/* async pool handler */
855 1939
856#define PRIO_MAX 3
857#define PRIO_HIGH 1
858#define PRIO_NORMAL 0
859#define PRIO_LOW -1
860#define PRIO_IDLE -3
861#define PRIO_MIN -4
862
863/* for Coro.pm */
864static GV *coro_current, *coro_idle;
865static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
866static int coro_nready;
867
868static void 1940static int
869coro_enq (pTHX_ SV *sv) 1941slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
870{ 1942{
871 SV **xprio; 1943 HV *hv = (HV *)SvRV (coro_current);
872 int prio; 1944 struct coro *coro = (struct coro *)frame->data;
873 1945
1946 if (!coro->invoke_cb)
1947 return 1; /* loop till we have invoke */
1948 else
1949 {
1950 hv_store (hv, "desc", sizeof ("desc") - 1,
1951 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1952
1953 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1954
1955 {
1956 dSP;
1957 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1958 PUTBACK;
1959 }
1960
1961 SvREFCNT_dec (GvAV (PL_defgv));
1962 GvAV (PL_defgv) = coro->invoke_av;
1963 coro->invoke_av = 0;
1964
1965 return 0;
1966 }
1967}
1968
1969static void
1970slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1971{
1972 HV *hv = (HV *)SvRV (coro_current);
1973 struct coro *coro = SvSTATE_hv ((SV *)hv);
1974
1975 if (expect_true (coro->saved_deffh))
1976 {
1977 /* subsequent iteration */
1978 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1979 coro->saved_deffh = 0;
1980
1981 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1982 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1983 {
1984 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1985 coro->invoke_av = newAV ();
1986
1987 frame->prepare = prepare_nop;
1988 }
1989 else
1990 {
1991 av_clear (GvAV (PL_defgv));
1992 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1993
1994 coro->prio = 0;
1995
1996 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1997 api_trace (aTHX_ coro_current, 0);
1998
1999 frame->prepare = prepare_schedule;
2000 av_push (av_async_pool, SvREFCNT_inc (hv));
2001 }
2002 }
2003 else
2004 {
2005 /* first iteration, simply fall through */
2006 frame->prepare = prepare_nop;
2007 }
2008
2009 frame->check = slf_check_pool_handler;
2010 frame->data = (void *)coro;
2011}
2012
2013/*****************************************************************************/
2014/* rouse callback */
2015
2016#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2017
2018static void
2019coro_rouse_callback (pTHX_ CV *cv)
2020{
2021 dXSARGS;
2022 SV *data = (SV *)S_GENSUB_ARG;
2023
874 if (SvTYPE (sv) != SVt_PVHV) 2024 if (SvTYPE (SvRV (data)) != SVt_PVAV)
875 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2025 {
2026 /* first call, set args */
2027 SV *coro = SvRV (data);
2028 AV *av = newAV ();
876 2029
877 xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 2030 SvRV_set (data, (SV *)av);
878 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
879 2031
880 prio = prio > PRIO_MAX ? PRIO_MAX 2032 /* better take a full copy of the arguments */
881 : prio < PRIO_MIN ? PRIO_MIN 2033 while (items--)
882 : prio; 2034 av_store (av, items, newSVsv (ST (items)));
883 2035
884 av_push (coro_ready [prio - PRIO_MIN], sv); 2036 api_ready (aTHX_ coro);
885 coro_nready++; 2037 SvREFCNT_dec (coro);
2038 }
2039
2040 XSRETURN_EMPTY;
2041}
2042
2043static int
2044slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2045{
2046 SV *data = (SV *)frame->data;
2047
2048 if (CORO_THROW)
2049 return 0;
2050
2051 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2052 return 1;
2053
2054 /* now push all results on the stack */
2055 {
2056 dSP;
2057 AV *av = (AV *)SvRV (data);
2058 int i;
2059
2060 EXTEND (SP, AvFILLp (av) + 1);
2061 for (i = 0; i <= AvFILLp (av); ++i)
2062 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2063
2064 /* we have stolen the elements, so set length to zero and free */
2065 AvFILLp (av) = -1;
2066 av_undef (av);
2067
2068 PUTBACK;
2069 }
2070
2071 return 0;
2072}
2073
2074static void
2075slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2076{
2077 SV *cb;
2078
2079 if (items)
2080 cb = arg [0];
2081 else
2082 {
2083 struct coro *coro = SvSTATE_current;
2084
2085 if (!coro->rouse_cb)
2086 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2087
2088 cb = sv_2mortal (coro->rouse_cb);
2089 coro->rouse_cb = 0;
2090 }
2091
2092 if (!SvROK (cb)
2093 || SvTYPE (SvRV (cb)) != SVt_PVCV
2094 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2095 croak ("Coro::rouse_wait called with illegal callback argument,");
2096
2097 {
2098 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2099 SV *data = (SV *)S_GENSUB_ARG;
2100
2101 frame->data = (void *)data;
2102 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2103 frame->check = slf_check_rouse_wait;
2104 }
886} 2105}
887 2106
888static SV * 2107static SV *
889coro_deq (pTHX_ int min_prio) 2108coro_new_rouse_cb (pTHX)
890{ 2109{
891 int prio = PRIO_MAX - PRIO_MIN; 2110 HV *hv = (HV *)SvRV (coro_current);
2111 struct coro *coro = SvSTATE_hv (hv);
2112 SV *data = newRV_inc ((SV *)hv);
2113 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
892 2114
893 min_prio -= PRIO_MIN; 2115 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
894 if (min_prio < 0) 2116 SvREFCNT_dec (data); /* magicext increases the refcount */
895 min_prio = 0;
896 2117
897 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2118 SvREFCNT_dec (coro->rouse_cb);
898 if (av_len (coro_ready[prio]) >= 0) 2119 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2120
2121 return cb;
2122}
2123
2124/*****************************************************************************/
2125/* schedule-like-function opcode (SLF) */
2126
2127static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2128static const CV *slf_cv;
2129static SV **slf_argv;
2130static int slf_argc, slf_arga; /* count, allocated */
2131static I32 slf_ax; /* top of stack, for restore */
2132
2133/* this restores the stack in the case we patched the entersub, to */
2134/* recreate the stack frame as perl will on following calls */
2135/* since entersub cleared the stack */
2136static OP *
2137pp_restore (pTHX)
2138{
2139 int i;
2140 SV **SP = PL_stack_base + slf_ax;
2141
2142 PUSHMARK (SP);
2143
2144 EXTEND (SP, slf_argc + 1);
2145
2146 for (i = 0; i < slf_argc; ++i)
2147 PUSHs (sv_2mortal (slf_argv [i]));
2148
2149 PUSHs ((SV *)CvGV (slf_cv));
2150
2151 RETURNOP (slf_restore.op_first);
2152}
2153
2154static void
2155slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2156{
2157 SV **arg = (SV **)slf_frame.data;
2158
2159 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2160}
2161
2162static void
2163slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2164{
2165 if (items != 2)
2166 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2167
2168 frame->prepare = slf_prepare_transfer;
2169 frame->check = slf_check_nop;
2170 frame->data = (void *)arg; /* let's hope it will stay valid */
2171}
2172
2173static void
2174slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2175{
2176 frame->prepare = prepare_schedule;
2177 frame->check = slf_check_nop;
2178}
2179
2180static void
2181slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2182{
2183 struct coro *next = (struct coro *)slf_frame.data;
2184
2185 SvREFCNT_inc_NN (next->hv);
2186 prepare_schedule_to (aTHX_ ta, next);
2187}
2188
2189static void
2190slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2191{
2192 if (!items)
2193 croak ("Coro::schedule_to expects a coroutine argument, caught");
2194
2195 frame->data = (void *)SvSTATE (arg [0]);
2196 frame->prepare = slf_prepare_schedule_to;
2197 frame->check = slf_check_nop;
2198}
2199
2200static void
2201slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2202{
2203 api_ready (aTHX_ SvRV (coro_current));
2204
2205 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2206}
2207
2208static void
2209slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2210{
2211 frame->prepare = prepare_cede;
2212 frame->check = slf_check_nop;
2213}
2214
2215static void
2216slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2217{
2218 frame->prepare = prepare_cede_notself;
2219 frame->check = slf_check_nop;
2220}
2221
2222/*
2223 * these not obviously related functions are all rolled into one
2224 * function to increase chances that they all will call transfer with the same
2225 * stack offset
2226 * SLF stands for "schedule-like-function".
2227 */
2228static OP *
2229pp_slf (pTHX)
2230{
2231 I32 checkmark; /* mark SP to see how many elements check has pushed */
2232
2233 /* set up the slf frame, unless it has already been set-up */
2234 /* the latter happens when a new coro has been started */
2235 /* or when a new cctx was attached to an existing coroutine */
2236 if (expect_true (!slf_frame.prepare))
2237 {
2238 /* first iteration */
2239 dSP;
2240 SV **arg = PL_stack_base + TOPMARK + 1;
2241 int items = SP - arg; /* args without function object */
2242 SV *gv = *sp;
2243
2244 /* do a quick consistency check on the "function" object, and if it isn't */
2245 /* for us, divert to the real entersub */
2246 if (SvTYPE (gv) != SVt_PVGV
2247 || !GvCV (gv)
2248 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2249 return PL_ppaddr[OP_ENTERSUB](aTHX);
2250
2251 if (!(PL_op->op_flags & OPf_STACKED))
899 { 2252 {
900 coro_nready--; 2253 /* ampersand-form of call, use @_ instead of stack */
901 return av_shift (coro_ready[prio]); 2254 AV *av = GvAV (PL_defgv);
2255 arg = AvARRAY (av);
2256 items = AvFILLp (av) + 1;
902 } 2257 }
2258
2259 /* now call the init function, which needs to set up slf_frame */
2260 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2261 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2262
2263 /* pop args */
2264 SP = PL_stack_base + POPMARK;
2265
2266 PUTBACK;
2267 }
2268
2269 /* now that we have a slf_frame, interpret it! */
2270 /* we use a callback system not to make the code needlessly */
2271 /* complicated, but so we can run multiple perl coros from one cctx */
2272
2273 do
2274 {
2275 struct coro_transfer_args ta;
2276
2277 slf_frame.prepare (aTHX_ &ta);
2278 TRANSFER (ta, 0);
2279
2280 checkmark = PL_stack_sp - PL_stack_base;
2281 }
2282 while (slf_frame.check (aTHX_ &slf_frame));
2283
2284 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2285
2286 /* exception handling */
2287 if (expect_false (CORO_THROW))
2288 {
2289 SV *exception = sv_2mortal (CORO_THROW);
2290
2291 CORO_THROW = 0;
2292 sv_setsv (ERRSV, exception);
2293 croak (0);
2294 }
2295
2296 /* return value handling - mostly like entersub */
2297 /* make sure we put something on the stack in scalar context */
2298 if (GIMME_V == G_SCALAR)
2299 {
2300 dSP;
2301 SV **bot = PL_stack_base + checkmark;
2302
2303 if (sp == bot) /* too few, push undef */
2304 bot [1] = &PL_sv_undef;
2305 else if (sp != bot + 1) /* too many, take last one */
2306 bot [1] = *sp;
2307
2308 SP = bot + 1;
2309
2310 PUTBACK;
2311 }
2312
2313 return NORMAL;
2314}
2315
2316static void
2317api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2318{
2319 int i;
2320 SV **arg = PL_stack_base + ax;
2321 int items = PL_stack_sp - arg + 1;
2322
2323 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2324
2325 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2326 && PL_op->op_ppaddr != pp_slf)
2327 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2328
2329 CvFLAGS (cv) |= CVf_SLF;
2330 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2331 slf_cv = cv;
2332
2333 /* we patch the op, and then re-run the whole call */
2334 /* we have to put the same argument on the stack for this to work */
2335 /* and this will be done by pp_restore */
2336 slf_restore.op_next = (OP *)&slf_restore;
2337 slf_restore.op_type = OP_CUSTOM;
2338 slf_restore.op_ppaddr = pp_restore;
2339 slf_restore.op_first = PL_op;
2340
2341 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2342
2343 if (PL_op->op_flags & OPf_STACKED)
2344 {
2345 if (items > slf_arga)
2346 {
2347 slf_arga = items;
2348 free (slf_argv);
2349 slf_argv = malloc (slf_arga * sizeof (SV *));
2350 }
2351
2352 slf_argc = items;
2353
2354 for (i = 0; i < items; ++i)
2355 slf_argv [i] = SvREFCNT_inc (arg [i]);
2356 }
2357 else
2358 slf_argc = 0;
2359
2360 PL_op->op_ppaddr = pp_slf;
2361 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2362
2363 PL_op = (OP *)&slf_restore;
2364}
2365
2366/*****************************************************************************/
2367/* dynamic wind */
2368
2369static void
2370on_enterleave_call (pTHX_ SV *cb)
2371{
2372 dSP;
2373
2374 PUSHSTACK;
2375
2376 PUSHMARK (SP);
2377 PUTBACK;
2378 call_sv (cb, G_VOID | G_DISCARD);
2379 SPAGAIN;
2380
2381 POPSTACK;
2382}
2383
2384static SV *
2385coro_avp_pop_and_free (pTHX_ AV **avp)
2386{
2387 AV *av = *avp;
2388 SV *res = av_pop (av);
2389
2390 if (AvFILLp (av) < 0)
2391 {
2392 *avp = 0;
2393 SvREFCNT_dec (av);
2394 }
2395
2396 return res;
2397}
2398
2399static void
2400coro_pop_on_enter (pTHX_ void *coro)
2401{
2402 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2403 SvREFCNT_dec (cb);
2404}
2405
2406static void
2407coro_pop_on_leave (pTHX_ void *coro)
2408{
2409 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2410 on_enterleave_call (aTHX_ sv_2mortal (cb));
2411}
2412
2413/*****************************************************************************/
2414/* PerlIO::cede */
2415
2416typedef struct
2417{
2418 PerlIOBuf base;
2419 NV next, every;
2420} PerlIOCede;
2421
2422static IV
2423PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2424{
2425 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2426
2427 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2428 self->next = nvtime () + self->every;
2429
2430 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2431}
2432
2433static SV *
2434PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2435{
2436 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2437
2438 return newSVnv (self->every);
2439}
2440
2441static IV
2442PerlIOCede_flush (pTHX_ PerlIO *f)
2443{
2444 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2445 double now = nvtime ();
2446
2447 if (now >= self->next)
2448 {
2449 api_cede (aTHX);
2450 self->next = now + self->every;
2451 }
2452
2453 return PerlIOBuf_flush (aTHX_ f);
2454}
2455
2456static PerlIO_funcs PerlIO_cede =
2457{
2458 sizeof(PerlIO_funcs),
2459 "cede",
2460 sizeof(PerlIOCede),
2461 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2462 PerlIOCede_pushed,
2463 PerlIOBuf_popped,
2464 PerlIOBuf_open,
2465 PerlIOBase_binmode,
2466 PerlIOCede_getarg,
2467 PerlIOBase_fileno,
2468 PerlIOBuf_dup,
2469 PerlIOBuf_read,
2470 PerlIOBuf_unread,
2471 PerlIOBuf_write,
2472 PerlIOBuf_seek,
2473 PerlIOBuf_tell,
2474 PerlIOBuf_close,
2475 PerlIOCede_flush,
2476 PerlIOBuf_fill,
2477 PerlIOBase_eof,
2478 PerlIOBase_error,
2479 PerlIOBase_clearerr,
2480 PerlIOBase_setlinebuf,
2481 PerlIOBuf_get_base,
2482 PerlIOBuf_bufsiz,
2483 PerlIOBuf_get_ptr,
2484 PerlIOBuf_get_cnt,
2485 PerlIOBuf_set_ptrcnt,
2486};
2487
2488/*****************************************************************************/
2489/* Coro::Semaphore & Coro::Signal */
2490
2491static SV *
2492coro_waitarray_new (pTHX_ int count)
2493{
2494 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2495 AV *av = newAV ();
2496 SV **ary;
2497
2498 /* unfortunately, building manually saves memory */
2499 Newx (ary, 2, SV *);
2500 AvALLOC (av) = ary;
2501#if PERL_VERSION_ATLEAST (5,10,0)
2502 AvARRAY (av) = ary;
2503#else
2504 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2505 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2506 SvPVX ((SV *)av) = (char *)ary;
2507#endif
2508 AvMAX (av) = 1;
2509 AvFILLp (av) = 0;
2510 ary [0] = newSViv (count);
2511
2512 return newRV_noinc ((SV *)av);
2513}
2514
2515/* semaphore */
2516
2517static void
2518coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2519{
2520 SV *count_sv = AvARRAY (av)[0];
2521 IV count = SvIVX (count_sv);
2522
2523 count += adjust;
2524 SvIVX (count_sv) = count;
2525
2526 /* now wake up as many waiters as are expected to lock */
2527 while (count > 0 && AvFILLp (av) > 0)
2528 {
2529 SV *cb;
2530
2531 /* swap first two elements so we can shift a waiter */
2532 AvARRAY (av)[0] = AvARRAY (av)[1];
2533 AvARRAY (av)[1] = count_sv;
2534 cb = av_shift (av);
2535
2536 if (SvOBJECT (cb))
2537 {
2538 api_ready (aTHX_ cb);
2539 --count;
2540 }
2541 else if (SvTYPE (cb) == SVt_PVCV)
2542 {
2543 dSP;
2544 PUSHMARK (SP);
2545 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2546 PUTBACK;
2547 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2548 }
2549
2550 SvREFCNT_dec (cb);
2551 }
2552}
2553
2554static void
2555coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2556{
2557 /* call $sem->adjust (0) to possibly wake up some other waiters */
2558 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2559}
2560
2561static int
2562slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2563{
2564 AV *av = (AV *)frame->data;
2565 SV *count_sv = AvARRAY (av)[0];
2566
2567 /* if we are about to throw, don't actually acquire the lock, just throw */
2568 if (CORO_THROW)
2569 return 0;
2570 else if (SvIVX (count_sv) > 0)
2571 {
2572 SvSTATE_current->on_destroy = 0;
2573
2574 if (acquire)
2575 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2576 else
2577 coro_semaphore_adjust (aTHX_ av, 0);
2578
2579 return 0;
2580 }
2581 else
2582 {
2583 int i;
2584 /* if we were woken up but can't down, we look through the whole */
2585 /* waiters list and only add us if we aren't in there already */
2586 /* this avoids some degenerate memory usage cases */
2587
2588 for (i = 1; i <= AvFILLp (av); ++i)
2589 if (AvARRAY (av)[i] == SvRV (coro_current))
2590 return 1;
2591
2592 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2593 return 1;
2594 }
2595}
2596
2597static int
2598slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2599{
2600 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2601}
2602
2603static int
2604slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2605{
2606 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2607}
2608
2609static void
2610slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2611{
2612 AV *av = (AV *)SvRV (arg [0]);
2613
2614 if (SvIVX (AvARRAY (av)[0]) > 0)
2615 {
2616 frame->data = (void *)av;
2617 frame->prepare = prepare_nop;
2618 }
2619 else
2620 {
2621 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2622
2623 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2624 frame->prepare = prepare_schedule;
2625
2626 /* to avoid race conditions when a woken-up coro gets terminated */
2627 /* we arrange for a temporary on_destroy that calls adjust (0) */
2628 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2629 }
2630}
2631
2632static void
2633slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2634{
2635 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2636 frame->check = slf_check_semaphore_down;
2637}
2638
2639static void
2640slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2641{
2642 if (items >= 2)
2643 {
2644 /* callback form */
2645 AV *av = (AV *)SvRV (arg [0]);
2646 SV *cb_cv = s_get_cv_croak (arg [1]);
2647
2648 av_push (av, SvREFCNT_inc_NN (cb_cv));
2649
2650 if (SvIVX (AvARRAY (av)[0]) > 0)
2651 coro_semaphore_adjust (aTHX_ av, 0);
2652
2653 frame->prepare = prepare_nop;
2654 frame->check = slf_check_nop;
2655 }
2656 else
2657 {
2658 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2659 frame->check = slf_check_semaphore_wait;
2660 }
2661}
2662
2663/* signal */
2664
2665static void
2666coro_signal_wake (pTHX_ AV *av, int count)
2667{
2668 SvIVX (AvARRAY (av)[0]) = 0;
2669
2670 /* now signal count waiters */
2671 while (count > 0 && AvFILLp (av) > 0)
2672 {
2673 SV *cb;
2674
2675 /* swap first two elements so we can shift a waiter */
2676 cb = AvARRAY (av)[0];
2677 AvARRAY (av)[0] = AvARRAY (av)[1];
2678 AvARRAY (av)[1] = cb;
2679
2680 cb = av_shift (av);
2681
2682 if (SvTYPE (cb) == SVt_PVCV)
2683 {
2684 dSP;
2685 PUSHMARK (SP);
2686 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2687 PUTBACK;
2688 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2689 }
2690 else
2691 {
2692 api_ready (aTHX_ cb);
2693 sv_setiv (cb, 0); /* signal waiter */
2694 }
2695
2696 SvREFCNT_dec (cb);
2697
2698 --count;
2699 }
2700}
2701
2702static int
2703slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2704{
2705 /* if we are about to throw, also stop waiting */
2706 return SvROK ((SV *)frame->data) && !CORO_THROW;
2707}
2708
2709static void
2710slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2711{
2712 AV *av = (AV *)SvRV (arg [0]);
2713
2714 if (items >= 2)
2715 {
2716 SV *cb_cv = s_get_cv_croak (arg [1]);
2717 av_push (av, SvREFCNT_inc_NN (cb_cv));
2718
2719 if (SvIVX (AvARRAY (av)[0]))
2720 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2721
2722 frame->prepare = prepare_nop;
2723 frame->check = slf_check_nop;
2724 }
2725 else if (SvIVX (AvARRAY (av)[0]))
2726 {
2727 SvIVX (AvARRAY (av)[0]) = 0;
2728 frame->prepare = prepare_nop;
2729 frame->check = slf_check_nop;
2730 }
2731 else
2732 {
2733 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2734
2735 av_push (av, waiter);
2736
2737 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2738 frame->prepare = prepare_schedule;
2739 frame->check = slf_check_signal_wait;
2740 }
2741}
2742
2743/*****************************************************************************/
2744/* Coro::AIO */
2745
2746#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2747
2748/* helper storage struct */
2749struct io_state
2750{
2751 int errorno;
2752 I32 laststype; /* U16 in 5.10.0 */
2753 int laststatval;
2754 Stat_t statcache;
2755};
2756
2757static void
2758coro_aio_callback (pTHX_ CV *cv)
2759{
2760 dXSARGS;
2761 AV *state = (AV *)S_GENSUB_ARG;
2762 SV *coro = av_pop (state);
2763 SV *data_sv = newSV (sizeof (struct io_state));
2764
2765 av_extend (state, items - 1);
2766
2767 sv_upgrade (data_sv, SVt_PV);
2768 SvCUR_set (data_sv, sizeof (struct io_state));
2769 SvPOK_only (data_sv);
2770
2771 {
2772 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2773
2774 data->errorno = errno;
2775 data->laststype = PL_laststype;
2776 data->laststatval = PL_laststatval;
2777 data->statcache = PL_statcache;
2778 }
2779
2780 /* now build the result vector out of all the parameters and the data_sv */
2781 {
2782 int i;
2783
2784 for (i = 0; i < items; ++i)
2785 av_push (state, SvREFCNT_inc_NN (ST (i)));
2786 }
2787
2788 av_push (state, data_sv);
2789
2790 api_ready (aTHX_ coro);
2791 SvREFCNT_dec (coro);
2792 SvREFCNT_dec ((AV *)state);
2793}
2794
2795static int
2796slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2797{
2798 AV *state = (AV *)frame->data;
2799
2800 /* if we are about to throw, return early */
2801 /* this does not cancel the aio request, but at least */
2802 /* it quickly returns */
2803 if (CORO_THROW)
2804 return 0;
2805
2806 /* one element that is an RV? repeat! */
2807 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2808 return 1;
2809
2810 /* restore status */
2811 {
2812 SV *data_sv = av_pop (state);
2813 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2814
2815 errno = data->errorno;
2816 PL_laststype = data->laststype;
2817 PL_laststatval = data->laststatval;
2818 PL_statcache = data->statcache;
2819
2820 SvREFCNT_dec (data_sv);
2821 }
2822
2823 /* push result values */
2824 {
2825 dSP;
2826 int i;
2827
2828 EXTEND (SP, AvFILLp (state) + 1);
2829 for (i = 0; i <= AvFILLp (state); ++i)
2830 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2831
2832 PUTBACK;
2833 }
903 2834
904 return 0; 2835 return 0;
905} 2836}
906 2837
907static void 2838static void
908api_ready (SV *coro) 2839slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
909{ 2840{
910 dTHX; 2841 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
911
912 if (SvROK (coro))
913 coro = SvRV (coro);
914
915 LOCK;
916 coro_enq (aTHX_ SvREFCNT_inc (coro));
917 UNLOCK;
918}
919
920static void
921api_schedule (void)
922{
923 dTHX;
924
925 SV *prev, *next;
926
927 LOCK;
928
929 prev = SvRV (GvSV (coro_current)); 2842 SV *coro_hv = SvRV (coro_current);
930 next = coro_deq (aTHX_ PRIO_MIN); 2843 struct coro *coro = SvSTATE_hv (coro_hv);
931 2844
932 if (!next) 2845 /* put our coroutine id on the state arg */
933 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 2846 av_push (state, SvREFCNT_inc_NN (coro_hv));
934 2847
935 /* free this only after the transfer */ 2848 /* first see whether we have a non-zero priority and set it as AIO prio */
936 coro_mortal = prev; 2849 if (coro->prio)
937 SV_CORO (prev, "Coro::schedule"); 2850 {
2851 dSP;
938 2852
939 SvRV (GvSV (coro_current)) = next; 2853 static SV *prio_cv;
2854 static SV *prio_sv;
940 2855
941 SV_CORO (next, "Coro::schedule"); 2856 if (expect_false (!prio_cv))
2857 {
2858 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2859 prio_sv = newSViv (0);
2860 }
942 2861
943 UNLOCK; 2862 PUSHMARK (SP);
2863 sv_setiv (prio_sv, coro->prio);
2864 XPUSHs (prio_sv);
944 2865
945 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 2866 PUTBACK;
946 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2867 call_sv (prio_cv, G_VOID | G_DISCARD);
947} 2868 }
948 2869
949static void 2870 /* now call the original request */
950api_cede (void) 2871 {
951{ 2872 dSP;
952 dTHX; 2873 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2874 int i;
953 2875
954 LOCK; 2876 PUSHMARK (SP);
955 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
956 UNLOCK;
957 2877
958 api_schedule (); 2878 /* first push all args to the stack */
959} 2879 EXTEND (SP, items + 1);
960 2880
2881 for (i = 0; i < items; ++i)
2882 PUSHs (arg [i]);
2883
2884 /* now push the callback closure */
2885 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2886
2887 /* now call the AIO function - we assume our request is uncancelable */
2888 PUTBACK;
2889 call_sv ((SV *)req, G_VOID | G_DISCARD);
2890 }
2891
2892 /* now that the requets is going, we loop toll we have a result */
2893 frame->data = (void *)state;
2894 frame->prepare = prepare_schedule;
2895 frame->check = slf_check_aio_req;
2896}
2897
2898static void
2899coro_aio_req_xs (pTHX_ CV *cv)
2900{
2901 dXSARGS;
2902
2903 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2904
2905 XSRETURN_EMPTY;
2906}
2907
2908/*****************************************************************************/
2909
2910#if CORO_CLONE
2911# include "clone.c"
2912#endif
2913
961MODULE = Coro::State PACKAGE = Coro::State 2914MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
962 2915
963PROTOTYPES: ENABLE 2916PROTOTYPES: DISABLE
964 2917
965BOOT: 2918BOOT:
966{ /* {} necessary for stoopid perl-5.6.x */ 2919{
967#ifdef USE_ITHREADS 2920#ifdef USE_ITHREADS
968 MUTEX_INIT (&coro_mutex); 2921# if CORO_PTHREAD
2922 coro_thx = PERL_GET_CONTEXT;
2923# endif
969#endif 2924#endif
2925 BOOT_PAGESIZE;
970 2926
971 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2927 cctx_current = cctx_new_empty ();
972 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2928
2929 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2930 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2931
2932 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2933 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2934 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2935
2936 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2937 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2938 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2939
973 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2940 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
974 2941
975 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2942 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
976 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2943 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
977 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2944 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
978 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2945 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
979 2946
980 main_mainstack = PL_mainstack; 2947 main_mainstack = PL_mainstack;
2948 main_top_env = PL_top_env;
981 2949
2950 while (main_top_env->je_prev)
2951 main_top_env = main_top_env->je_prev;
2952
2953 {
2954 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2955
2956 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2957 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2958
2959 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2960 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2961 }
2962
982 coroapi.ver = CORO_API_VERSION; 2963 coroapi.ver = CORO_API_VERSION;
2964 coroapi.rev = CORO_API_REVISION;
2965
983 coroapi.transfer = api_transfer; 2966 coroapi.transfer = api_transfer;
984}
985 2967
986Coro::State 2968 coroapi.sv_state = SvSTATE_;
987_newprocess(args) 2969 coroapi.execute_slf = api_execute_slf;
988 SV * args 2970 coroapi.prepare_nop = prepare_nop;
989 PROTOTYPE: $ 2971 coroapi.prepare_schedule = prepare_schedule;
2972 coroapi.prepare_cede = prepare_cede;
2973 coroapi.prepare_cede_notself = prepare_cede_notself;
2974
2975 {
2976 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2977
2978 if (!svp) croak ("Time::HiRes is required");
2979 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2980
2981 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2982
2983 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
2984 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
2985 }
2986
2987 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
2988}
2989
2990SV *
2991new (char *klass, ...)
2992 ALIAS:
2993 Coro::new = 1
990 CODE: 2994 CODE:
991 Coro__State coro; 2995{
2996 struct coro *coro;
2997 MAGIC *mg;
2998 HV *hv;
2999 SV *cb;
3000 int i;
992 3001
993 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3002 if (items > 1)
994 croak ("Coro::State::_newprocess expects an arrayref");
995 3003 {
3004 cb = s_get_cv_croak (ST (1));
3005
3006 if (!ix)
3007 {
3008 if (CvISXSUB (cb))
3009 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3010
3011 if (!CvROOT (cb))
3012 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3013 }
3014 }
3015
996 Newz (0, coro, 1, struct coro); 3016 Newz (0, coro, 1, struct coro);
3017 coro->args = newAV ();
3018 coro->flags = CF_NEW;
997 3019
998 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 3020 if (coro_first) coro_first->prev = coro;
999 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 3021 coro->next = coro_first;
1000 /*coro->stack = 0;*/ 3022 coro_first = coro;
1001 3023
1002 /* same as JMPENV_BOOTSTRAP */ 3024 coro->hv = hv = newHV ();
1003 /* we might be able to recycle start_env, but safe is safe */ 3025 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1004 /*Zero(&coro->start_env, 1, JMPENV);*/ 3026 mg->mg_flags |= MGf_DUP;
1005 coro->start_env.je_ret = -1; 3027 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1006 coro->start_env.je_mustcatch = TRUE;
1007 3028
1008 RETVAL = coro; 3029 if (items > 1)
3030 {
3031 av_extend (coro->args, items - 1 + ix - 1);
3032
3033 if (ix)
3034 {
3035 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3036 cb = (SV *)cv_coro_run;
3037 }
3038
3039 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3040
3041 for (i = 2; i < items; i++)
3042 av_push (coro->args, newSVsv (ST (i)));
3043 }
3044}
1009 OUTPUT: 3045 OUTPUT:
1010 RETVAL 3046 RETVAL
1011 3047
1012void 3048void
1013transfer(prev, next, flags) 3049transfer (...)
1014 SV *prev
1015 SV *next
1016 int flags
1017 PROTOTYPE: @ 3050 PROTOTYPE: $$
1018 CODE: 3051 CODE:
1019 PUTBACK; 3052 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1020 SV_CORO (next, "Coro::transfer"); 3053
1021 SV_CORO (prev, "Coro::transfer"); 3054bool
1022 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3055_destroy (SV *coro_sv)
1023 SPAGAIN; 3056 CODE:
3057 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3058 OUTPUT:
3059 RETVAL
1024 3060
1025void 3061void
1026DESTROY(coro)
1027 Coro::State coro
1028 CODE:
1029
1030 if (coro->mainstack && coro->mainstack != main_mainstack)
1031 {
1032 struct coro temp;
1033
1034 PUTBACK;
1035 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1036 LOAD (aTHX_ coro);
1037 SPAGAIN;
1038
1039 destroy_stacks (aTHX);
1040
1041 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1042 SPAGAIN;
1043
1044 coro->mainstack = 0;
1045 }
1046
1047 deallocate_stack (coro);
1048 SvREFCNT_dec (coro->args);
1049 Safefree (coro);
1050
1051void
1052_exit(code) 3062_exit (int code)
1053 int code
1054 PROTOTYPE: $ 3063 PROTOTYPE: $
1055 CODE: 3064 CODE:
1056 _exit (code); 3065 _exit (code);
1057 3066
1058MODULE = Coro::State PACKAGE = Coro::Cont 3067SV *
3068clone (Coro::State coro)
3069 CODE:
3070{
3071#if CORO_CLONE
3072 struct coro *ncoro = coro_clone (aTHX_ coro);
3073 MAGIC *mg;
3074 /* TODO: too much duplication */
3075 ncoro->hv = newHV ();
3076 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3077 mg->mg_flags |= MGf_DUP;
3078 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3079#else
3080 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3081#endif
3082}
3083 OUTPUT:
3084 RETVAL
1059 3085
1060# this is slightly dirty (should expose a c-level api) 3086int
3087cctx_stacksize (int new_stacksize = 0)
3088 PROTOTYPE: ;$
3089 CODE:
3090 RETVAL = cctx_stacksize;
3091 if (new_stacksize)
3092 {
3093 cctx_stacksize = new_stacksize;
3094 ++cctx_gen;
3095 }
3096 OUTPUT:
3097 RETVAL
3098
3099int
3100cctx_max_idle (int max_idle = 0)
3101 PROTOTYPE: ;$
3102 CODE:
3103 RETVAL = cctx_max_idle;
3104 if (max_idle > 1)
3105 cctx_max_idle = max_idle;
3106 OUTPUT:
3107 RETVAL
3108
3109int
3110cctx_count ()
3111 PROTOTYPE:
3112 CODE:
3113 RETVAL = cctx_count;
3114 OUTPUT:
3115 RETVAL
3116
3117int
3118cctx_idle ()
3119 PROTOTYPE:
3120 CODE:
3121 RETVAL = cctx_idle;
3122 OUTPUT:
3123 RETVAL
1061 3124
1062void 3125void
1063yield(...) 3126list ()
1064 PROTOTYPE: @ 3127 PROTOTYPE:
3128 PPCODE:
3129{
3130 struct coro *coro;
3131 for (coro = coro_first; coro; coro = coro->next)
3132 if (coro->hv)
3133 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3134}
3135
3136void
3137call (Coro::State coro, SV *coderef)
3138 ALIAS:
3139 eval = 1
3140 CODE:
3141{
3142 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3143 {
3144 struct coro *current = SvSTATE_current;
3145
3146 if (current != coro)
3147 {
3148 PUTBACK;
3149 save_perl (aTHX_ current);
3150 load_perl (aTHX_ coro);
3151 SPAGAIN;
3152 }
3153
3154 PUSHSTACK;
3155
3156 PUSHMARK (SP);
3157 PUTBACK;
3158
3159 if (ix)
3160 eval_sv (coderef, 0);
3161 else
3162 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3163
3164 POPSTACK;
3165 SPAGAIN;
3166
3167 if (current != coro)
3168 {
3169 PUTBACK;
3170 save_perl (aTHX_ coro);
3171 load_perl (aTHX_ current);
3172 SPAGAIN;
3173 }
3174 }
3175}
3176
3177SV *
3178is_ready (Coro::State coro)
3179 PROTOTYPE: $
3180 ALIAS:
3181 is_ready = CF_READY
3182 is_running = CF_RUNNING
3183 is_new = CF_NEW
3184 is_destroyed = CF_DESTROYED
3185 is_suspended = CF_SUSPENDED
3186 CODE:
3187 RETVAL = boolSV (coro->flags & ix);
3188 OUTPUT:
3189 RETVAL
3190
3191void
3192throw (Coro::State self, SV *throw = &PL_sv_undef)
3193 PROTOTYPE: $;$
1065 CODE: 3194 CODE:
1066 SV *yieldstack; 3195{
1067 SV *sv; 3196 struct coro *current = SvSTATE_current;
1068 AV *defav = GvAV (PL_defgv); 3197 SV **throwp = self == current ? &CORO_THROW : &self->except;
1069 struct coro *prev, *next;
1070
1071 yieldstack = *hv_fetch (
1072 (HV *)SvRV (GvSV (coro_current)),
1073 "yieldstack", sizeof ("yieldstack") - 1,
1074 0
1075 );
1076
1077 /* set up @_ -- ugly */
1078 av_clear (defav);
1079 av_fill (defav, items - 1);
1080 while (items--)
1081 av_store (defav, items, SvREFCNT_inc (ST(items)));
1082
1083 sv = av_pop ((AV *)SvRV (yieldstack));
1084 prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1085 next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1086 SvREFCNT_dec (sv); 3198 SvREFCNT_dec (*throwp);
1087 3199 SvGETMAGIC (throw);
1088 transfer (aTHX_ prev, next, 0); 3200 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
1089
1090MODULE = Coro::State PACKAGE = Coro
1091
1092# this is slightly dirty (should expose a c-level api)
1093
1094BOOT:
1095{
1096 int i;
1097 HV *stash = gv_stashpv ("Coro", TRUE);
1098
1099 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1100 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1101 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1102 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1103 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1104 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1105
1106 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1107 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1108
1109 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1110 coro_ready[i] = newAV ();
1111
1112 {
1113 SV *sv = perl_get_sv("Coro::API", 1);
1114
1115 coroapi.schedule = api_schedule;
1116 coroapi.cede = api_cede;
1117 coroapi.ready = api_ready;
1118 coroapi.nready = &coro_nready;
1119 coroapi.current = coro_current;
1120
1121 GCoroAPI = &coroapi;
1122 sv_setiv(sv, (IV)&coroapi);
1123 SvREADONLY_on(sv);
1124 }
1125} 3201}
1126
1127#if !PERL_MICRO
1128 3202
1129void 3203void
1130ready(self) 3204api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1131 SV * self 3205 PROTOTYPE: $;$
3206 C_ARGS: aTHX_ coro, flags
3207
3208SV *
3209has_cctx (Coro::State coro)
1132 PROTOTYPE: $ 3210 PROTOTYPE: $
1133 CODE: 3211 CODE:
1134 api_ready (self); 3212 /* maybe manage the running flag differently */
1135 3213 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1136#endif 3214 OUTPUT:
3215 RETVAL
1137 3216
1138int 3217int
3218is_traced (Coro::State coro)
3219 PROTOTYPE: $
3220 CODE:
3221 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3222 OUTPUT:
3223 RETVAL
3224
3225UV
3226rss (Coro::State coro)
3227 PROTOTYPE: $
3228 ALIAS:
3229 usecount = 1
3230 CODE:
3231 switch (ix)
3232 {
3233 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3234 case 1: RETVAL = coro->usecount; break;
3235 }
3236 OUTPUT:
3237 RETVAL
3238
3239void
3240force_cctx ()
3241 PROTOTYPE:
3242 CODE:
3243 cctx_current->idle_sp = 0;
3244
3245void
3246swap_defsv (Coro::State self)
3247 PROTOTYPE: $
3248 ALIAS:
3249 swap_defav = 1
3250 CODE:
3251 if (!self->slot)
3252 croak ("cannot swap state with coroutine that has no saved state,");
3253 else
3254 {
3255 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3256 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3257
3258 SV *tmp = *src; *src = *dst; *dst = tmp;
3259 }
3260
3261void
3262cancel (Coro::State self)
3263 CODE:
3264 coro_state_destroy (aTHX_ self);
3265 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3266
3267
3268SV *
3269enable_times (int enabled = enable_times)
3270 CODE:
3271{
3272 RETVAL = boolSV (enable_times);
3273
3274 if (enabled != enable_times)
3275 {
3276 enable_times = enabled;
3277
3278 coro_times_update ();
3279 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3280 }
3281}
3282 OUTPUT:
3283 RETVAL
3284
3285void
3286times (Coro::State self)
3287 PPCODE:
3288{
3289 struct coro *current = SvSTATE (coro_current);
3290
3291 if (expect_false (current == self))
3292 {
3293 coro_times_update ();
3294 coro_times_add (SvSTATE (coro_current));
3295 }
3296
3297 EXTEND (SP, 2);
3298 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3299 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3300
3301 if (expect_false (current == self))
3302 coro_times_sub (SvSTATE (coro_current));
3303}
3304
3305MODULE = Coro::State PACKAGE = Coro
3306
3307BOOT:
3308{
3309 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3310 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3311 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3312 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3313 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3314 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3315 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3316 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3317 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3318
3319 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3320 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3321 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3322 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3323
3324 coro_stash = gv_stashpv ("Coro", TRUE);
3325
3326 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3327 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3328 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3329 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3330 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3331 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3332
3333 {
3334 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3335
3336 coroapi.schedule = api_schedule;
3337 coroapi.schedule_to = api_schedule_to;
3338 coroapi.cede = api_cede;
3339 coroapi.cede_notself = api_cede_notself;
3340 coroapi.ready = api_ready;
3341 coroapi.is_ready = api_is_ready;
3342 coroapi.nready = coro_nready;
3343 coroapi.current = coro_current;
3344
3345 /*GCoroAPI = &coroapi;*/
3346 sv_setiv (sv, (IV)&coroapi);
3347 SvREADONLY_on (sv);
3348 }
3349}
3350
3351void
3352terminate (...)
3353 CODE:
3354 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3355
3356void
3357schedule (...)
3358 CODE:
3359 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3360
3361void
3362schedule_to (...)
3363 CODE:
3364 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3365
3366void
3367cede_to (...)
3368 CODE:
3369 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3370
3371void
3372cede (...)
3373 CODE:
3374 CORO_EXECUTE_SLF_XS (slf_init_cede);
3375
3376void
3377cede_notself (...)
3378 CODE:
3379 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3380
3381void
3382_set_current (SV *current)
3383 PROTOTYPE: $
3384 CODE:
3385 SvREFCNT_dec (SvRV (coro_current));
3386 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3387
3388void
3389_set_readyhook (SV *hook)
3390 PROTOTYPE: $
3391 CODE:
3392 SvREFCNT_dec (coro_readyhook);
3393 SvGETMAGIC (hook);
3394 if (SvOK (hook))
3395 {
3396 coro_readyhook = newSVsv (hook);
3397 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3398 }
3399 else
3400 {
3401 coro_readyhook = 0;
3402 CORO_READYHOOK = 0;
3403 }
3404
3405int
3406prio (Coro::State coro, int newprio = 0)
3407 PROTOTYPE: $;$
3408 ALIAS:
3409 nice = 1
3410 CODE:
3411{
3412 RETVAL = coro->prio;
3413
3414 if (items > 1)
3415 {
3416 if (ix)
3417 newprio = coro->prio - newprio;
3418
3419 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3420 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3421
3422 coro->prio = newprio;
3423 }
3424}
3425 OUTPUT:
3426 RETVAL
3427
3428SV *
3429ready (SV *self)
3430 PROTOTYPE: $
3431 CODE:
3432 RETVAL = boolSV (api_ready (aTHX_ self));
3433 OUTPUT:
3434 RETVAL
3435
3436int
1139nready(...) 3437nready (...)
1140 PROTOTYPE: 3438 PROTOTYPE:
1141 CODE: 3439 CODE:
1142 RETVAL = coro_nready; 3440 RETVAL = coro_nready;
1143 OUTPUT: 3441 OUTPUT:
1144 RETVAL 3442 RETVAL
1145 3443
1146void 3444void
1147schedule(...) 3445suspend (Coro::State self)
1148 PROTOTYPE: 3446 PROTOTYPE: $
1149 CODE: 3447 CODE:
1150 api_schedule (); 3448 self->flags |= CF_SUSPENDED;
1151 3449
1152void 3450void
1153cede(...) 3451resume (Coro::State self)
1154 PROTOTYPE: 3452 PROTOTYPE: $
1155 CODE: 3453 CODE:
1156 api_cede (); 3454 self->flags &= ~CF_SUSPENDED;
1157 3455
1158# and these are hacks 3456void
3457_pool_handler (...)
3458 CODE:
3459 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3460
3461void
3462async_pool (SV *cv, ...)
3463 PROTOTYPE: &@
3464 PPCODE:
3465{
3466 HV *hv = (HV *)av_pop (av_async_pool);
3467 AV *av = newAV ();
3468 SV *cb = ST (0);
3469 int i;
3470
3471 av_extend (av, items - 2);
3472 for (i = 1; i < items; ++i)
3473 av_push (av, SvREFCNT_inc_NN (ST (i)));
3474
3475 if ((SV *)hv == &PL_sv_undef)
3476 {
3477 PUSHMARK (SP);
3478 EXTEND (SP, 2);
3479 PUSHs (sv_Coro);
3480 PUSHs ((SV *)cv_pool_handler);
3481 PUTBACK;
3482 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3483 SPAGAIN;
3484
3485 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3486 }
3487
3488 {
3489 struct coro *coro = SvSTATE_hv (hv);
3490
3491 assert (!coro->invoke_cb);
3492 assert (!coro->invoke_av);
3493 coro->invoke_cb = SvREFCNT_inc (cb);
3494 coro->invoke_av = av;
3495 }
3496
3497 api_ready (aTHX_ (SV *)hv);
3498
3499 if (GIMME_V != G_VOID)
3500 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3501 else
3502 SvREFCNT_dec (hv);
3503}
3504
1159SV * 3505SV *
1160_aio_get_state () 3506rouse_cb ()
3507 PROTOTYPE:
1161 CODE: 3508 CODE:
1162{ 3509 RETVAL = coro_new_rouse_cb (aTHX);
1163 struct {
1164 int errorno;
1165 int laststype;
1166 int laststatval;
1167 Stat_t statcache;
1168 } data;
1169
1170 data.errorno = errno;
1171 data.laststype = PL_laststype;
1172 data.laststatval = PL_laststatval;
1173 data.statcache = PL_statcache;
1174
1175 RETVAL = newSVpvn ((char *)&data, sizeof data);
1176}
1177 OUTPUT: 3510 OUTPUT:
1178 RETVAL 3511 RETVAL
1179 3512
1180void 3513void
1181_aio_set_state (char *data_) 3514rouse_wait (...)
3515 PROTOTYPE: ;$
3516 PPCODE:
3517 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3518
3519void
3520on_enter (SV *block)
3521 ALIAS:
3522 on_leave = 1
1182 PROTOTYPE: $ 3523 PROTOTYPE: &
1183 CODE: 3524 CODE:
1184{ 3525{
1185 struct { 3526 struct coro *coro = SvSTATE_current;
3527 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3528
3529 block = s_get_cv_croak (block);
3530
3531 if (!*avp)
3532 *avp = newAV ();
3533
3534 av_push (*avp, SvREFCNT_inc (block));
3535
3536 if (!ix)
3537 on_enterleave_call (aTHX_ block);
3538
3539 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3540 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3541 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3542}
3543
3544
3545MODULE = Coro::State PACKAGE = PerlIO::cede
3546
3547BOOT:
3548 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3549
3550
3551MODULE = Coro::State PACKAGE = Coro::Semaphore
3552
3553SV *
3554new (SV *klass, SV *count = 0)
3555 CODE:
3556{
3557 int semcnt = 1;
3558
3559 if (count)
3560 {
3561 SvGETMAGIC (count);
3562
3563 if (SvOK (count))
3564 semcnt = SvIV (count);
3565 }
3566
3567 RETVAL = sv_bless (
3568 coro_waitarray_new (aTHX_ semcnt),
3569 GvSTASH (CvGV (cv))
3570 );
3571}
3572 OUTPUT:
3573 RETVAL
3574
3575# helper for Coro::Channel and others
3576SV *
3577_alloc (int count)
3578 CODE:
3579 RETVAL = coro_waitarray_new (aTHX_ count);
3580 OUTPUT:
3581 RETVAL
3582
3583SV *
3584count (SV *self)
3585 CODE:
3586 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3587 OUTPUT:
3588 RETVAL
3589
3590void
3591up (SV *self, int adjust = 1)
3592 ALIAS:
3593 adjust = 1
3594 CODE:
3595 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3596
3597void
3598down (...)
3599 CODE:
3600 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3601
3602void
3603wait (...)
3604 CODE:
3605 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3606
3607void
3608try (SV *self)
3609 PPCODE:
3610{
3611 AV *av = (AV *)SvRV (self);
3612 SV *count_sv = AvARRAY (av)[0];
3613 IV count = SvIVX (count_sv);
3614
3615 if (count > 0)
3616 {
3617 --count;
3618 SvIVX (count_sv) = count;
3619 XSRETURN_YES;
3620 }
3621 else
3622 XSRETURN_NO;
3623}
3624
3625void
3626waiters (SV *self)
3627 PPCODE:
3628{
3629 AV *av = (AV *)SvRV (self);
3630 int wcount = AvFILLp (av) + 1 - 1;
3631
3632 if (GIMME_V == G_SCALAR)
3633 XPUSHs (sv_2mortal (newSViv (wcount)));
3634 else
3635 {
1186 int errorno; 3636 int i;
1187 int laststype; 3637 EXTEND (SP, wcount);
1188 int laststatval; 3638 for (i = 1; i <= wcount; ++i)
1189 Stat_t statcache; 3639 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1190 } *data = (void *)data_; 3640 }
1191
1192 errno = data->errorno;
1193 PL_laststype = data->laststype;
1194 PL_laststatval = data->laststatval;
1195 PL_statcache = data->statcache;
1196} 3641}
3642
3643MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3644
3645void
3646_may_delete (SV *sem, int count, int extra_refs)
3647 PPCODE:
3648{
3649 AV *av = (AV *)SvRV (sem);
3650
3651 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3652 && AvFILLp (av) == 0 /* no waiters, just count */
3653 && SvIV (AvARRAY (av)[0]) == count)
3654 XSRETURN_YES;
3655
3656 XSRETURN_NO;
3657}
3658
3659MODULE = Coro::State PACKAGE = Coro::Signal
3660
3661SV *
3662new (SV *klass)
3663 CODE:
3664 RETVAL = sv_bless (
3665 coro_waitarray_new (aTHX_ 0),
3666 GvSTASH (CvGV (cv))
3667 );
3668 OUTPUT:
3669 RETVAL
3670
3671void
3672wait (...)
3673 CODE:
3674 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3675
3676void
3677broadcast (SV *self)
3678 CODE:
3679{
3680 AV *av = (AV *)SvRV (self);
3681 coro_signal_wake (aTHX_ av, AvFILLp (av));
3682}
3683
3684void
3685send (SV *self)
3686 CODE:
3687{
3688 AV *av = (AV *)SvRV (self);
3689
3690 if (AvFILLp (av))
3691 coro_signal_wake (aTHX_ av, 1);
3692 else
3693 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3694}
3695
3696IV
3697awaited (SV *self)
3698 CODE:
3699 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3700 OUTPUT:
3701 RETVAL
3702
3703
3704MODULE = Coro::State PACKAGE = Coro::AnyEvent
3705
3706BOOT:
3707 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3708
3709void
3710_schedule (...)
3711 CODE:
3712{
3713 static int incede;
3714
3715 api_cede_notself (aTHX);
3716
3717 ++incede;
3718 while (coro_nready >= incede && api_cede (aTHX))
3719 ;
3720
3721 sv_setsv (sv_activity, &PL_sv_undef);
3722 if (coro_nready >= incede)
3723 {
3724 PUSHMARK (SP);
3725 PUTBACK;
3726 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3727 }
3728
3729 --incede;
3730}
3731
3732
3733MODULE = Coro::State PACKAGE = Coro::AIO
3734
3735void
3736_register (char *target, char *proto, SV *req)
3737 CODE:
3738{
3739 SV *req_cv = s_get_cv_croak (req);
3740 /* newXSproto doesn't return the CV on 5.8 */
3741 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3742 sv_setpv ((SV *)slf_cv, proto);
3743 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3744}
3745
3746MODULE = Coro::State PACKAGE = Coro::Select
3747
3748void
3749patch_pp_sselect ()
3750 CODE:
3751 if (!coro_old_pp_sselect)
3752 {
3753 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3754 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3755 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3756 }
3757
3758void
3759unpatch_pp_sselect ()
3760 CODE:
3761 if (coro_old_pp_sselect)
3762 {
3763 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3764 coro_old_pp_sselect = 0;
3765 }
3766
3767

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