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Comparing Coro/Coro/State.xs (file contents):
Revision 1.59 by root, Mon Jul 19 01:32:27 2004 UTC vs.
Revision 1.385 by root, Sat Feb 19 05:42:46 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
6#include "libcoro/coro.c"
7
1#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
8 17
9#if PATCHLEVEL < 6 18#include <stdio.h>
10# ifndef PL_ppaddr 19#include <errno.h>
11# define PL_ppaddr ppaddr 20#include <assert.h>
12# endif 21
13# ifndef call_sv
14# define call_sv perl_call_sv
15# endif
16# ifndef get_sv
17# define get_sv perl_get_sv
18# endif
19# ifndef get_cv
20# define get_cv perl_get_cv
21# endif
22# ifndef IS_PADGV
23# define IS_PADGV(v) 0
24# endif
25# ifndef IS_PADCONST 22#ifndef SVs_PADSTALE
26# define IS_PADCONST(v) 0 23# define SVs_PADSTALE 0
27# endif
28#endif 24#endif
29 25
30#include "libcoro/coro.c" 26#ifdef WIN32
31 27# undef setjmp
32#include <signal.h> 28# undef longjmp
29# undef _exit
30# define setjmp _setjmp /* deep magic */
31#else
32# include <inttypes.h> /* most portable stdint.h */
33#endif
33 34
34#ifdef HAVE_MMAP 35#ifdef HAVE_MMAP
35# include <unistd.h> 36# include <unistd.h>
36# include <sys/mman.h> 37# include <sys/mman.h>
37# ifndef MAP_ANONYMOUS 38# ifndef MAP_ANONYMOUS
… …
39# define MAP_ANONYMOUS MAP_ANON 40# define MAP_ANONYMOUS MAP_ANON
40# else 41# else
41# undef HAVE_MMAP 42# undef HAVE_MMAP
42# endif 43# endif
43# endif 44# endif
45# include <limits.h>
46# ifndef PAGESIZE
47# define PAGESIZE pagesize
48# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
49static long pagesize;
50# else
51# define BOOT_PAGESIZE (void)0
52# endif
53#else
54# define PAGESIZE 0
55# define BOOT_PAGESIZE (void)0
44#endif 56#endif
45 57
46#define SUB_INIT "Coro::State::initialize" 58#if CORO_USE_VALGRIND
47#define UCORO_STATE "_coro_state" 59# include <valgrind/valgrind.h>
60#endif
48 61
49/* The next macro should declare a variable stacklevel that contains and approximation 62/* 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 63static int cctx_max_idle = 4;
51 * and should be unique. */ 64
65#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
66# undef CORO_STACKGUARD
67#endif
68
69#ifndef CORO_STACKGUARD
70# define CORO_STACKGUARD 0
71#endif
72
73/* prefer perl internal functions over our own? */
74#ifndef CORO_PREFER_PERL_FUNCTIONS
75# define CORO_PREFER_PERL_FUNCTIONS 0
76#endif
77
78/* The next macros try to return the current stack pointer, in an as
79 * portable way as possible. */
80#if __GNUC__ >= 4
81# define dSTACKLEVEL int stacklevel_dummy
82# define STACKLEVEL __builtin_frame_address (0)
83#else
84# define dSTACKLEVEL volatile void *stacklevel
52#define dSTACKLEVEL void *stacklevel = &stacklevel 85# define STACKLEVEL ((void *)&stacklevel)
86#endif
53 87
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 88#define IN_DESTRUCT PL_dirty
55 89
56#define labs(l) ((l) >= 0 ? (l) : -(l)) 90#if __GNUC__ >= 3
91# define attribute(x) __attribute__(x)
92# define expect(expr,value) __builtin_expect ((expr), (value))
93# define INLINE static inline
94#else
95# define attribute(x)
96# define expect(expr,value) (expr)
97# define INLINE static
98#endif
99
100#define expect_false(expr) expect ((expr) != 0, 0)
101#define expect_true(expr) expect ((expr) != 0, 1)
102
103#define NOINLINE attribute ((noinline))
57 104
58#include "CoroAPI.h" 105#include "CoroAPI.h"
106#define GCoroAPI (&coroapi) /* very sneaky */
59 107
60#ifdef USE_ITHREADS 108#ifdef USE_ITHREADS
61static perl_mutex coro_mutex; 109# if CORO_PTHREAD
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 110static void *coro_thx;
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 111# endif
64#else
65# define LOCK 0
66# define UNLOCK 0
67#endif 112#endif
68 113
114#ifdef __linux
115# include <time.h> /* for timespec */
116# include <syscall.h> /* for SYS_* */
117# ifdef SYS_clock_gettime
118# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
119# define CORO_CLOCK_MONOTONIC 1
120# define CORO_CLOCK_THREAD_CPUTIME_ID 3
121# endif
122#endif
123
124static double (*nvtime)(); /* so why doesn't it take void? */
125static void (*u2time)(pTHX_ UV ret[2]);
126
127/* we hijack an hopefully unused CV flag for our purposes */
128#define CVf_SLF 0x4000
129static OP *pp_slf (pTHX);
130
131static U32 cctx_gen;
132static size_t cctx_stacksize = CORO_STACKSIZE;
69static struct CoroAPI coroapi; 133static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 134static AV *main_mainstack; /* used to differentiate between $main and others */
135static JMPENV *main_top_env;
71static HV *coro_state_stash; 136static 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 */ 137static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
75 138
76/* this is actually not only the c stack but also c registers etc... */ 139static AV *av_destroy; /* destruction queue */
140static SV *sv_manager; /* the manager coro */
141static SV *sv_idle; /* $Coro::idle */
142
143static GV *irsgv; /* $/ */
144static GV *stdoutgv; /* *STDOUT */
145static SV *rv_diehook;
146static SV *rv_warnhook;
147static HV *hv_sig; /* %SIG */
148
149/* async_pool helper stuff */
150static SV *sv_pool_rss;
151static SV *sv_pool_size;
152static SV *sv_async_pool_idle; /* description string */
153static AV *av_async_pool; /* idle pool */
154static SV *sv_Coro; /* class string */
155static CV *cv_pool_handler;
156
157/* Coro::AnyEvent */
158static SV *sv_activity;
159
160/* enable processtime/realtime profiling */
161static char enable_times;
162typedef U32 coro_ts[2];
163static coro_ts time_real, time_cpu;
164static char times_valid;
165
166static struct coro_cctx *cctx_first;
167static int cctx_count, cctx_idle;
168
169enum {
170 CC_MAPPED = 0x01,
171 CC_NOREUSE = 0x02, /* throw this away after tracing */
172 CC_TRACE = 0x04,
173 CC_TRACE_SUB = 0x08, /* trace sub calls */
174 CC_TRACE_LINE = 0x10, /* trace each statement */
175 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
176};
177
178/* this is a structure representing a c-level coroutine */
77typedef struct { 179typedef struct coro_cctx
78 int refcnt; /* pointer reference counter */ 180{
79 int usecnt; /* shared by how many coroutines */ 181 struct coro_cctx *next;
80 int gencnt; /* generation counter */
81 182
183 /* the stack */
184 void *sptr;
185 size_t ssize;
186
187 /* cpu state */
188 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
189 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
190 JMPENV *top_env;
82 coro_context cctx; 191 coro_context cctx;
83 192
84 void *sptr; 193 U32 gen;
85 long ssize; /* positive == mmap, otherwise malloc */ 194#if CORO_USE_VALGRIND
86} coro_stack; 195 int valgrind_id;
196#endif
197 unsigned char flags;
198} coro_cctx;
87 199
200coro_cctx *cctx_current; /* the currently running cctx */
201
202/*****************************************************************************/
203
204enum {
205 CF_RUNNING = 0x0001, /* coroutine is running */
206 CF_READY = 0x0002, /* coroutine is ready */
207 CF_NEW = 0x0004, /* has never been switched to */
208 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
209 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
210};
211
212/* the structure where most of the perl state is stored, overlaid on the cxstack */
213typedef struct
214{
215 SV *defsv;
216 AV *defav;
217 SV *errsv;
218 SV *irsgv;
219 HV *hinthv;
220#define VAR(name,type) type name;
221# include "state.h"
222#undef VAR
223} perl_slots;
224
225#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
226
227/* this is a structure representing a perl-level coroutine */
88struct coro { 228struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 229 /* the C coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env; 230 coro_cctx *cctx;
91 231
92 /* the optional C context */ 232 /* ready queue */
93 coro_stack *stack; 233 struct coro *next_ready;
94 void *cursp;
95 int gencnt;
96 234
97 /* optionally saved, might be zero */ 235 /* state data */
98 AV *defav; 236 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; 237 AV *mainstack;
110 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
111 OP *op;
112 SV **curpad;
113 AV *comppad;
114 SV **stack_base;
115 SV **stack_max;
116 SV **tmps_stack;
117 I32 tmps_floor;
118 I32 tmps_ix;
119 I32 tmps_max;
120 I32 *markstack;
121 I32 *markstack_ptr;
122 I32 *markstack_max;
123 I32 *scopestack;
124 I32 scopestack_ix;
125 I32 scopestack_max;
126 ANY *savestack;
127 I32 savestack_ix;
128 I32 savestack_max;
129 OP **retstack;
130 I32 retstack_ix;
131 I32 retstack_max;
132 COP *curcop;
133 JMPENV *top_env;
134 239
240 CV *startcv; /* the CV to execute */
135 /* data associated with this coroutine (initial args) */ 241 AV *args; /* data associated with this coroutine (initial args) */
136 AV *args; 242 int refcnt; /* coroutines are refcounted, yes */
243 int flags; /* CF_ flags */
244 HV *hv; /* the perl hash associated with this coro, if any */
245 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
246
247 /* statistics */
248 int usecount; /* number of transfers to this coro */
249
250 /* coro process data */
251 int prio;
252 SV *except; /* exception to be thrown */
253 SV *rouse_cb;
254
255 /* async_pool */
256 SV *saved_deffh;
257 SV *invoke_cb;
258 AV *invoke_av;
259
260 /* on_enter/on_leave */
261 AV *on_enter;
262 AV *on_leave;
263
264 /* swap_sv */
265 AV *swap_sv;
266
267 /* times */
268 coro_ts t_cpu, t_real;
269
270 /* linked list */
271 struct coro *next, *prev;
137}; 272};
138 273
139typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
140typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
141 276
142/* mostly copied from op.c:cv_clone2 */ 277/* the following variables are effectively part of the perl context */
143STATIC AV * 278/* and get copied between struct coro and these variables */
144clone_padlist (pTHX_ AV *protopadlist) 279/* the mainr easonw e don't support windows process emulation */
280static struct CoroSLF slf_frame; /* the current slf frame */
281
282/** Coro ********************************************************************/
283
284#define CORO_PRIO_MAX 3
285#define CORO_PRIO_HIGH 1
286#define CORO_PRIO_NORMAL 0
287#define CORO_PRIO_LOW -1
288#define CORO_PRIO_IDLE -3
289#define CORO_PRIO_MIN -4
290
291/* for Coro.pm */
292static SV *coro_current;
293static SV *coro_readyhook;
294static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
295static CV *cv_coro_run, *cv_coro_terminate;
296static struct coro *coro_first;
297#define coro_nready coroapi.nready
298
299/** Coro::Select ************************************************************/
300
301static OP *(*coro_old_pp_sselect) (pTHX);
302static SV *coro_select_select;
303
304/* horrible hack, but if it works... */
305static OP *
306coro_pp_sselect (pTHX)
145{ 307{
146 AV *av; 308 dSP;
147 I32 ix; 309 PUSHMARK (SP - 4); /* fake argument list */
148 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 310 XPUSHs (coro_select_select);
149 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 311 PUTBACK;
150 SV **pname = AvARRAY (protopad_name); 312
151 SV **ppad = AvARRAY (protopad); 313 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
152 I32 fname = AvFILLp (protopad_name); 314 PL_op->op_flags |= OPf_STACKED;
153 I32 fpad = AvFILLp (protopad); 315 PL_op->op_private = 0;
316 return PL_ppaddr [OP_ENTERSUB](aTHX);
317}
318
319/** lowlevel stuff **********************************************************/
320
321static SV *
322coro_get_sv (pTHX_ const char *name, int create)
323{
324#if PERL_VERSION_ATLEAST (5,10,0)
325 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
326 get_sv (name, create);
327#endif
328 return get_sv (name, create);
329}
330
331static AV *
332coro_get_av (pTHX_ const char *name, int create)
333{
334#if PERL_VERSION_ATLEAST (5,10,0)
335 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
336 get_av (name, create);
337#endif
338 return get_av (name, create);
339}
340
341static HV *
342coro_get_hv (pTHX_ const char *name, int create)
343{
344#if PERL_VERSION_ATLEAST (5,10,0)
345 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
346 get_hv (name, create);
347#endif
348 return get_hv (name, create);
349}
350
351INLINE void
352coro_times_update ()
353{
354#ifdef coro_clock_gettime
355 struct timespec ts;
356
357 ts.tv_sec = ts.tv_nsec = 0;
358 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
359 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
360
361 ts.tv_sec = ts.tv_nsec = 0;
362 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
363 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
364#else
365 dTHX;
366 UV tv[2];
367
368 u2time (aTHX_ tv);
369 time_real [0] = tv [0];
370 time_real [1] = tv [1] * 1000;
371#endif
372}
373
374INLINE void
375coro_times_add (struct coro *c)
376{
377 c->t_real [1] += time_real [1];
378 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
379 c->t_real [0] += time_real [0];
380
381 c->t_cpu [1] += time_cpu [1];
382 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
383 c->t_cpu [0] += time_cpu [0];
384}
385
386INLINE void
387coro_times_sub (struct coro *c)
388{
389 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
390 c->t_real [1] -= time_real [1];
391 c->t_real [0] -= time_real [0];
392
393 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
394 c->t_cpu [1] -= time_cpu [1];
395 c->t_cpu [0] -= time_cpu [0];
396}
397
398/*****************************************************************************/
399/* magic glue */
400
401#define CORO_MAGIC_type_cv 26
402#define CORO_MAGIC_type_state PERL_MAGIC_ext
403
404#define CORO_MAGIC_NN(sv, type) \
405 (expect_true (SvMAGIC (sv)->mg_type == type) \
406 ? SvMAGIC (sv) \
407 : mg_find (sv, type))
408
409#define CORO_MAGIC(sv, type) \
410 (expect_true (SvMAGIC (sv)) \
411 ? CORO_MAGIC_NN (sv, type) \
412 : 0)
413
414#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
415#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
416
417INLINE struct coro *
418SvSTATE_ (pTHX_ SV *coro)
419{
420 HV *stash;
421 MAGIC *mg;
422
423 if (SvROK (coro))
424 coro = SvRV (coro);
425
426 if (expect_false (SvTYPE (coro) != SVt_PVHV))
427 croak ("Coro::State object required");
428
429 stash = SvSTASH (coro);
430 if (expect_false (stash != coro_stash && stash != coro_state_stash))
431 {
432 /* very slow, but rare, check */
433 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
434 croak ("Coro::State object required");
435 }
436
437 mg = CORO_MAGIC_state (coro);
438 return (struct coro *)mg->mg_ptr;
439}
440
441#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
442
443/* faster than SvSTATE, but expects a coroutine hv */
444#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
445#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
446
447/*****************************************************************************/
448/* padlist management and caching */
449
450static AV *
451coro_derive_padlist (pTHX_ CV *cv)
452{
453 AV *padlist = CvPADLIST (cv);
154 AV *newpadlist, *newpad_name, *newpad; 454 AV *newpadlist, *newpad;
155 SV **npad;
156
157 newpad_name = newAV ();
158 for (ix = fname; ix >= 0; ix--)
159 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161 newpad = newAV ();
162 av_fill (newpad, AvFILLp (protopad));
163 npad = AvARRAY (newpad);
164 455
165 newpadlist = newAV (); 456 newpadlist = newAV ();
166 AvREAL_off (newpadlist); 457 AvREAL_off (newpadlist);
167 av_store (newpadlist, 0, (SV *) newpad_name); 458#if PERL_VERSION_ATLEAST (5,10,0)
459 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
460#else
461 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
462#endif
463 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
464 --AvFILLp (padlist);
465
466 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
168 av_store (newpadlist, 1, (SV *) newpad); 467 av_store (newpadlist, 1, (SV *)newpad);
169 468
170 av = newAV (); /* will be @_ */ 469 return newpadlist;
171 av_extend (av, 0); 470}
172 av_store (newpad, 0, (SV *) av);
173 AvFLAGS (av) = AVf_REIFY;
174 471
175 for (ix = fpad; ix > 0; ix--) 472static void
473free_padlist (pTHX_ AV *padlist)
474{
475 /* may be during global destruction */
476 if (!IN_DESTRUCT)
176 { 477 {
177 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 478 I32 i = AvFILLp (padlist);
178 479
179 if (namesv && namesv != &PL_sv_undef) 480 while (i > 0) /* special-case index 0 */
180 { 481 {
181 char *name = SvPVX (namesv); /* XXX */ 482 /* we try to be extra-careful here */
483 AV *av = (AV *)AvARRAY (padlist)[i--];
484 I32 j = AvFILLp (av);
182 485
183 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 486 while (j >= 0)
184 { /* lexical from outside? */ 487 SvREFCNT_dec (AvARRAY (av)[j--]);
185 npad[ix] = SvREFCNT_inc (ppad[ix]);
186 }
187 else
188 { /* our own lexical */
189 SV *sv;
190 if (*name == '&')
191 sv = SvREFCNT_inc (ppad[ix]);
192 else if (*name == '@')
193 sv = (SV *) newAV ();
194 else if (*name == '%')
195 sv = (SV *) newHV ();
196 else
197 sv = NEWSV (0, 0);
198 488
199#ifdef SvPADBUSY 489 AvFILLp (av) = -1;
200 if (!SvPADBUSY (sv)) 490 SvREFCNT_dec (av);
201#endif
202 SvPADMY_on (sv);
203
204 npad[ix] = sv;
205 }
206 } 491 }
207 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208 {
209 npad[ix] = SvREFCNT_inc (ppad[ix]);
210 }
211 else
212 {
213 SV *sv = NEWSV (0, 0);
214 SvPADTMP_on (sv);
215 npad[ix] = sv;
216 }
217 }
218 492
219#if 0 /* return -ENOTUNDERSTOOD */ 493 SvREFCNT_dec (AvARRAY (padlist)[0]);
220 /* Now that vars are all in place, clone nested closures. */
221 494
222 for (ix = fpad; ix > 0; ix--) {
223 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224 if (namesv
225 && namesv != &PL_sv_undef
226 && !(SvFLAGS(namesv) & SVf_FAKE)
227 && *SvPVX(namesv) == '&'
228 && CvCLONE(ppad[ix]))
229 {
230 CV *kid = cv_clone((CV*)ppad[ix]);
231 SvREFCNT_dec(ppad[ix]);
232 CvCLONE_on(kid);
233 SvPADMY_on(kid);
234 npad[ix] = (SV*)kid;
235 }
236 }
237#endif
238
239 return newpadlist;
240}
241
242STATIC void
243free_padlist (pTHX_ AV *padlist)
244{
245 /* may be during global destruction */
246 if (SvREFCNT (padlist))
247 {
248 I32 i = AvFILLp (padlist); 495 AvFILLp (padlist) = -1;
249 while (i >= 0)
250 {
251 SV **svp = av_fetch (padlist, i--, FALSE);
252 if (svp)
253 {
254 SV *sv;
255 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
256 SvREFCNT_dec (sv);
257
258 SvREFCNT_dec (*svp);
259 }
260 }
261
262 SvREFCNT_dec ((SV*)padlist); 496 SvREFCNT_dec ((SV*)padlist);
263 } 497 }
264} 498}
265 499
266STATIC int 500static int
267coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 501coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268{ 502{
269 AV *padlist; 503 AV *padlist;
270 AV *av = (AV *)mg->mg_obj; 504 AV *av = (AV *)mg->mg_obj;
505
506 /* perl manages to free our internal AV and _then_ call us */
507 if (IN_DESTRUCT)
508 return 0;
271 509
272 /* casting is fun. */ 510 /* casting is fun. */
273 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 511 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274 free_padlist (aTHX_ padlist); 512 free_padlist (aTHX_ padlist);
275}
276 513
277#define PERL_MAGIC_coro PERL_MAGIC_ext 514 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
278 515
279static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 516 return 0;
517}
518
519static MGVTBL coro_cv_vtbl = {
520 0, 0, 0, 0,
521 coro_cv_free
522};
280 523
281/* the next two functions merely cache the padlists */ 524/* the next two functions merely cache the padlists */
282STATIC void 525static void
283get_padlist (pTHX_ CV *cv) 526get_padlist (pTHX_ CV *cv)
284{ 527{
285 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 528 MAGIC *mg = CORO_MAGIC_cv (cv);
529 AV *av;
286 530
287 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 531 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
288 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 532 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
289 else 533 else
534 {
535#if CORO_PREFER_PERL_FUNCTIONS
536 /* this is probably cleaner? but also slower! */
537 /* in practise, it seems to be less stable */
538 CV *cp = Perl_cv_clone (aTHX_ cv);
539 CvPADLIST (cv) = CvPADLIST (cp);
540 CvPADLIST (cp) = 0;
541 SvREFCNT_dec (cp);
542#else
290 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 543 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
544#endif
545 }
291} 546}
292 547
293STATIC void 548static void
294put_padlist (pTHX_ CV *cv) 549put_padlist (pTHX_ CV *cv)
295{ 550{
296 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 551 MAGIC *mg = CORO_MAGIC_cv (cv);
552 AV *av;
297 553
298 if (!mg) 554 if (expect_false (!mg))
555 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
556
557 av = (AV *)mg->mg_obj;
558
559 if (expect_false (AvFILLp (av) >= AvMAX (av)))
560 av_extend (av, AvFILLp (av) + 1);
561
562 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
563}
564
565/** load & save, init *******************************************************/
566
567/* swap sv heads, at least logically */
568static void
569swap_svs (pTHX_ Coro__State c)
570{
571 int i;
572
573 for (i = 0; i <= AvFILLp (c->swap_sv); )
574 {
575 SV *a = AvARRAY (c->swap_sv)[i++];
576 SV *b = AvARRAY (c->swap_sv)[i++];
577
578 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
579 SV tmp;
580
581 /* swap sv_any */
582 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
583
584 /* swap sv_flags */
585 SvFLAGS (&tmp) = SvFLAGS (a);
586 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
587 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
588
589#if PERL_VERSION_ATLEAST (5,10,0)
590 /* perl 5.10 complicates this _quite_ a bit, but it also is
591 * much faster, so no quarrels here. alternatively, we could
592 * sv_upgrade to avoid this.
593 */
299 { 594 {
300 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 595 /* swap sv_u */
301 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 596 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
302 mg->mg_virtual = &vtbl_coro; 597
303 mg->mg_obj = (SV *)newAV (); 598 /* if SvANY points to the head, we need to adjust the pointers,
599 * as the pointer for a still points to b, and maybe vice versa.
600 */
601 #define svany_in_head(type) \
602 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
603
604 if (svany_in_head (SvTYPE (a)))
605 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
606
607 if (svany_in_head (SvTYPE (b)))
608 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
304 } 609 }
305 610#endif
306 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 611 }
307} 612}
308 613
309#define SB do { 614#define SWAP_SVS(coro) \
310#define SE } while (0) 615 if (expect_false ((coro)->swap_sv)) \
616 swap_svs (aTHX_ (coro))
311 617
312#define LOAD(state) load_state(aTHX_ (state));
313#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
314
315#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
316
317static void 618static void
619on_enterleave_call (pTHX_ SV *cb);
620
621static void
318load_state(pTHX_ Coro__State c) 622load_perl (pTHX_ Coro__State c)
319{ 623{
320 PL_dowarn = c->dowarn; 624 perl_slots *slot = c->slot;
321 PL_in_eval = c->in_eval; 625 c->slot = 0;
322 626
323 PL_curstackinfo = c->curstackinfo;
324 PL_curstack = c->curstack;
325 PL_mainstack = c->mainstack; 627 PL_mainstack = c->mainstack;
326 PL_stack_sp = c->stack_sp;
327 PL_op = c->op;
328 PL_curpad = c->curpad;
329 PL_comppad = c->comppad;
330 PL_stack_base = c->stack_base;
331 PL_stack_max = c->stack_max;
332 PL_tmps_stack = c->tmps_stack;
333 PL_tmps_floor = c->tmps_floor;
334 PL_tmps_ix = c->tmps_ix;
335 PL_tmps_max = c->tmps_max;
336 PL_markstack = c->markstack;
337 PL_markstack_ptr = c->markstack_ptr;
338 PL_markstack_max = c->markstack_max;
339 PL_scopestack = c->scopestack;
340 PL_scopestack_ix = c->scopestack_ix;
341 PL_scopestack_max = c->scopestack_max;
342 PL_savestack = c->savestack;
343 PL_savestack_ix = c->savestack_ix;
344 PL_savestack_max = c->savestack_max;
345 PL_retstack = c->retstack;
346 PL_retstack_ix = c->retstack_ix;
347 PL_retstack_max = c->retstack_max;
348 PL_curcop = c->curcop;
349 PL_top_env = c->top_env;
350 628
351 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 629 GvSV (PL_defgv) = slot->defsv;
352 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 630 GvAV (PL_defgv) = slot->defav;
353 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 631 GvSV (PL_errgv) = slot->errsv;
632 GvSV (irsgv) = slot->irsgv;
633 GvHV (PL_hintgv) = slot->hinthv;
634
635 #define VAR(name,type) PL_ ## name = slot->name;
636 # include "state.h"
637 #undef VAR
354 638
355 { 639 {
356 dSP; 640 dSP;
641
357 CV *cv; 642 CV *cv;
358 643
359 /* now do the ugly restore mess */ 644 /* now do the ugly restore mess */
360 while ((cv = (CV *)POPs)) 645 while (expect_true (cv = (CV *)POPs))
361 { 646 {
362 AV *padlist = (AV *)POPs;
363
364 if (padlist)
365 {
366 put_padlist (aTHX_ cv); /* mark this padlist as available */ 647 put_padlist (aTHX_ cv); /* mark this padlist as available */
367 CvPADLIST(cv) = padlist; 648 CvDEPTH (cv) = PTR2IV (POPs);
368 } 649 CvPADLIST (cv) = (AV *)POPs;
369
370 ++CvDEPTH(cv);
371 } 650 }
372 651
373 PUTBACK; 652 PUTBACK;
374 } 653 }
375}
376 654
655 slf_frame = c->slf_frame;
656 CORO_THROW = c->except;
657
658 if (expect_false (enable_times))
659 {
660 if (expect_false (!times_valid))
661 coro_times_update ();
662
663 coro_times_sub (c);
664 }
665
666 if (expect_false (c->on_enter))
667 {
668 int i;
669
670 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
671 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
672 }
673
674 SWAP_SVS (c);
675}
676
377static void 677static void
378save_state(pTHX_ Coro__State c, int flags) 678save_perl (pTHX_ Coro__State c)
379{ 679{
680 SWAP_SVS (c);
681
682 if (expect_false (c->on_leave))
683 {
684 int i;
685
686 for (i = AvFILLp (c->on_leave); i >= 0; --i)
687 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
688 }
689
690 times_valid = 0;
691
692 if (expect_false (enable_times))
693 {
694 coro_times_update (); times_valid = 1;
695 coro_times_add (c);
696 }
697
698 c->except = CORO_THROW;
699 c->slf_frame = slf_frame;
700
380 { 701 {
381 dSP; 702 dSP;
382 I32 cxix = cxstack_ix; 703 I32 cxix = cxstack_ix;
383 PERL_CONTEXT *ccstk = cxstack; 704 PERL_CONTEXT *ccstk = cxstack;
384 PERL_SI *top_si = PL_curstackinfo; 705 PERL_SI *top_si = PL_curstackinfo;
… …
386 /* 707 /*
387 * the worst thing you can imagine happens first - we have to save 708 * the worst thing you can imagine happens first - we have to save
388 * (and reinitialize) all cv's in the whole callchain :( 709 * (and reinitialize) all cv's in the whole callchain :(
389 */ 710 */
390 711
391 PUSHs (Nullsv); 712 XPUSHs (Nullsv);
392 /* this loop was inspired by pp_caller */ 713 /* this loop was inspired by pp_caller */
393 for (;;) 714 for (;;)
394 { 715 {
395 while (cxix >= 0) 716 while (expect_true (cxix >= 0))
396 { 717 {
397 PERL_CONTEXT *cx = &ccstk[cxix--]; 718 PERL_CONTEXT *cx = &ccstk[cxix--];
398 719
399 if (CxTYPE(cx) == CXt_SUB) 720 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
400 { 721 {
401 CV *cv = cx->blk_sub.cv; 722 CV *cv = cx->blk_sub.cv;
723
402 if (CvDEPTH(cv)) 724 if (expect_true (CvDEPTH (cv)))
403 { 725 {
404 EXTEND (SP, CvDEPTH(cv)*2); 726 EXTEND (SP, 3);
405
406 while (--CvDEPTH(cv))
407 {
408 /* this tells the restore code to increment CvDEPTH */
409 PUSHs (Nullsv);
410 PUSHs ((SV *)cv);
411 }
412
413 PUSHs ((SV *)CvPADLIST(cv)); 727 PUSHs ((SV *)CvPADLIST (cv));
728 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
414 PUSHs ((SV *)cv); 729 PUSHs ((SV *)cv);
415 730
731 CvDEPTH (cv) = 0;
416 get_padlist (aTHX_ cv); /* this is a monster */ 732 get_padlist (aTHX_ cv);
417 } 733 }
418 } 734 }
419#ifdef CXt_FORMAT
420 else if (CxTYPE(cx) == CXt_FORMAT)
421 {
422 /* I never used formats, so how should I know how these are implemented? */
423 /* my bold guess is as a simple, plain sub... */
424 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
425 }
426#endif
427 } 735 }
428 736
429 if (top_si->si_type == PERLSI_MAIN) 737 if (expect_true (top_si->si_type == PERLSI_MAIN))
430 break; 738 break;
431 739
432 top_si = top_si->si_prev; 740 top_si = top_si->si_prev;
433 ccstk = top_si->si_cxstack; 741 ccstk = top_si->si_cxstack;
434 cxix = top_si->si_cxix; 742 cxix = top_si->si_cxix;
435 } 743 }
436 744
437 PUTBACK; 745 PUTBACK;
438 } 746 }
439 747
440 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 748 /* allocate some space on the context stack for our purposes */
441 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 749 /* we manually unroll here, as usually 2 slots is enough */
442 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 750 if (SLOT_COUNT >= 1) CXINC;
751 if (SLOT_COUNT >= 2) CXINC;
752 if (SLOT_COUNT >= 3) CXINC;
753 {
754 unsigned int i;
755 for (i = 3; i < SLOT_COUNT; ++i)
756 CXINC;
757 }
758 cxstack_ix -= SLOT_COUNT; /* undo allocation */
443 759
444 c->dowarn = PL_dowarn;
445 c->in_eval = PL_in_eval;
446
447 c->curstackinfo = PL_curstackinfo;
448 c->curstack = PL_curstack;
449 c->mainstack = PL_mainstack; 760 c->mainstack = PL_mainstack;
450 c->stack_sp = PL_stack_sp; 761
451 c->op = PL_op; 762 {
452 c->curpad = PL_curpad; 763 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
453 c->comppad = PL_comppad; 764
454 c->stack_base = PL_stack_base; 765 slot->defav = GvAV (PL_defgv);
455 c->stack_max = PL_stack_max; 766 slot->defsv = DEFSV;
456 c->tmps_stack = PL_tmps_stack; 767 slot->errsv = ERRSV;
457 c->tmps_floor = PL_tmps_floor; 768 slot->irsgv = GvSV (irsgv);
458 c->tmps_ix = PL_tmps_ix; 769 slot->hinthv = GvHV (PL_hintgv);
459 c->tmps_max = PL_tmps_max; 770
460 c->markstack = PL_markstack; 771 #define VAR(name,type) slot->name = PL_ ## name;
461 c->markstack_ptr = PL_markstack_ptr; 772 # include "state.h"
462 c->markstack_max = PL_markstack_max; 773 #undef VAR
463 c->scopestack = PL_scopestack; 774 }
464 c->scopestack_ix = PL_scopestack_ix;
465 c->scopestack_max = PL_scopestack_max;
466 c->savestack = PL_savestack;
467 c->savestack_ix = PL_savestack_ix;
468 c->savestack_max = PL_savestack_max;
469 c->retstack = PL_retstack;
470 c->retstack_ix = PL_retstack_ix;
471 c->retstack_max = PL_retstack_max;
472 c->curcop = PL_curcop;
473 c->top_env = PL_top_env;
474} 775}
475 776
476/* 777/*
477 * allocate various perl stacks. This is an exact copy 778 * allocate various perl stacks. This is almost an exact copy
478 * of perl.c:init_stacks, except that it uses less memory 779 * of perl.c:init_stacks, except that it uses less memory
479 * on the (sometimes correct) assumption that coroutines do 780 * on the (sometimes correct) assumption that coroutines do
480 * not usually need a lot of stackspace. 781 * not usually need a lot of stackspace.
481 */ 782 */
482STATIC void 783#if CORO_PREFER_PERL_FUNCTIONS
784# define coro_init_stacks(thx) init_stacks ()
785#else
786static void
483coro_init_stacks (pTHX) 787coro_init_stacks (pTHX)
484{ 788{
485 LOCK; 789 PL_curstackinfo = new_stackinfo(32, 8);
486
487 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
488 PL_curstackinfo->si_type = PERLSI_MAIN; 790 PL_curstackinfo->si_type = PERLSI_MAIN;
489 PL_curstack = PL_curstackinfo->si_stack; 791 PL_curstack = PL_curstackinfo->si_stack;
490 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 792 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
491 793
492 PL_stack_base = AvARRAY(PL_curstack); 794 PL_stack_base = AvARRAY(PL_curstack);
493 PL_stack_sp = PL_stack_base; 795 PL_stack_sp = PL_stack_base;
494 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 796 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
495 797
496 New(50,PL_tmps_stack,96,SV*); 798 New(50,PL_tmps_stack,32,SV*);
497 PL_tmps_floor = -1; 799 PL_tmps_floor = -1;
498 PL_tmps_ix = -1; 800 PL_tmps_ix = -1;
499 PL_tmps_max = 96; 801 PL_tmps_max = 32;
500 802
501 New(54,PL_markstack,16,I32); 803 New(54,PL_markstack,16,I32);
502 PL_markstack_ptr = PL_markstack; 804 PL_markstack_ptr = PL_markstack;
503 PL_markstack_max = PL_markstack + 16; 805 PL_markstack_max = PL_markstack + 16;
504 806
505#ifdef SET_MARK_OFFSET 807#ifdef SET_MARK_OFFSET
506 SET_MARK_OFFSET; 808 SET_MARK_OFFSET;
507#endif 809#endif
508 810
509 New(54,PL_scopestack,16,I32); 811 New(54,PL_scopestack,8,I32);
510 PL_scopestack_ix = 0; 812 PL_scopestack_ix = 0;
511 PL_scopestack_max = 16; 813 PL_scopestack_max = 8;
512 814
513 New(54,PL_savestack,96,ANY); 815 New(54,PL_savestack,24,ANY);
514 PL_savestack_ix = 0; 816 PL_savestack_ix = 0;
515 PL_savestack_max = 96; 817 PL_savestack_max = 24;
516 818
819#if !PERL_VERSION_ATLEAST (5,10,0)
517 New(54,PL_retstack,8,OP*); 820 New(54,PL_retstack,4,OP*);
518 PL_retstack_ix = 0; 821 PL_retstack_ix = 0;
519 PL_retstack_max = 8; 822 PL_retstack_max = 4;
520 823#endif
521 UNLOCK;
522} 824}
825#endif
523 826
524/* 827/*
525 * destroy the stacks, the callchain etc... 828 * destroy the stacks, the callchain etc...
526 */ 829 */
527STATIC void 830static void
528destroy_stacks(pTHX) 831coro_destruct_stacks (pTHX)
529{ 832{
530 if (!IN_DESTRUCT)
531 {
532 /* is this ugly, I ask? */
533 LEAVE_SCOPE (0);
534
535 /* sure it is, but more important: is it correct?? :/ */
536 FREETMPS;
537
538 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
539 }
540
541 while (PL_curstackinfo->si_next) 833 while (PL_curstackinfo->si_next)
542 PL_curstackinfo = PL_curstackinfo->si_next; 834 PL_curstackinfo = PL_curstackinfo->si_next;
543 835
544 while (PL_curstackinfo) 836 while (PL_curstackinfo)
545 { 837 {
546 PERL_SI *p = PL_curstackinfo->si_prev; 838 PERL_SI *p = PL_curstackinfo->si_prev;
547 839
548 { /*D*//*remove*/
549 dSP;
550 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
551 PUTBACK; /* possibly superfluous */
552 }
553
554 if (!IN_DESTRUCT) 840 if (!IN_DESTRUCT)
555 {
556 dounwind (-1);/*D*//*remove*/
557 SvREFCNT_dec (PL_curstackinfo->si_stack); 841 SvREFCNT_dec (PL_curstackinfo->si_stack);
558 }
559 842
560 Safefree (PL_curstackinfo->si_cxstack); 843 Safefree (PL_curstackinfo->si_cxstack);
561 Safefree (PL_curstackinfo); 844 Safefree (PL_curstackinfo);
562 PL_curstackinfo = p; 845 PL_curstackinfo = p;
563 } 846 }
564 847
565 Safefree (PL_tmps_stack); 848 Safefree (PL_tmps_stack);
566 Safefree (PL_markstack); 849 Safefree (PL_markstack);
567 Safefree (PL_scopestack); 850 Safefree (PL_scopestack);
568 Safefree (PL_savestack); 851 Safefree (PL_savestack);
852#if !PERL_VERSION_ATLEAST (5,10,0)
569 Safefree (PL_retstack); 853 Safefree (PL_retstack);
570}
571
572static void
573allocate_stack (Coro__State ctx, int alloc)
574{
575 coro_stack *stack;
576
577 New (0, stack, 1, coro_stack);
578
579 stack->refcnt = 1;
580 stack->usecnt = 1;
581 stack->gencnt = ctx->gencnt = 0;
582
583 if (alloc)
584 {
585#if HAVE_MMAP
586 stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
587 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588 if (stack->sptr == (void *)-1)
589#endif 854#endif
855}
856
857#define CORO_RSS \
858 rss += sizeof (SYM (curstackinfo)); \
859 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
860 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
861 rss += SYM (tmps_max) * sizeof (SV *); \
862 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
863 rss += SYM (scopestack_max) * sizeof (I32); \
864 rss += SYM (savestack_max) * sizeof (ANY);
865
866static size_t
867coro_rss (pTHX_ struct coro *coro)
868{
869 size_t rss = sizeof (*coro);
870
871 if (coro->mainstack)
872 {
873 if (coro->flags & CF_RUNNING)
590 { 874 {
591 /*FIXME*//*D*//* reasonable stack size! */ 875 #define SYM(sym) PL_ ## sym
592 stack->ssize = - (8192 * sizeof (long)); 876 CORO_RSS;
593 New (0, stack->sptr, 8192, long); 877 #undef SYM
594 } 878 }
595 }
596 else 879 else
597 stack->sptr = 0;
598
599 ctx->stack = stack;
600}
601
602static void
603deallocate_stack (Coro__State ctx)
604{
605 coro_stack *stack = ctx->stack;
606
607 ctx->stack = 0;
608
609 if (stack)
610 {
611 if (!--stack->refcnt)
612 { 880 {
613#ifdef HAVE_MMAP 881 #define SYM(sym) coro->slot->sym
614 if (stack->ssize > 0 && stack->sptr) 882 CORO_RSS;
615 munmap (stack->sptr, stack->ssize); 883 #undef SYM
616 else 884 }
885 }
886
887 return rss;
888}
889
890/** coroutine stack handling ************************************************/
891
892static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
893static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
894static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
895
896/* apparently < 5.8.8 */
897#ifndef MgPV_nolen_const
898#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
899 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
900 (const char*)(mg)->mg_ptr)
617#endif 901#endif
618 Safefree (stack->sptr);
619 902
620 Safefree (stack); 903/*
904 * This overrides the default magic get method of %SIG elements.
905 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
906 * and instead of trying to save and restore the hash elements, we just provide
907 * readback here.
908 */
909static int
910coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
911{
912 const char *s = MgPV_nolen_const (mg);
913
914 if (*s == '_')
915 {
916 SV **svp = 0;
917
918 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
919 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
920
921 if (svp)
922 {
923 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
924 return 0;
621 } 925 }
622 else if (ctx->gencnt == stack->gencnt) 926 }
623 --stack->usecnt; 927
928 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
929}
930
931static int
932coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
933{
934 const char *s = MgPV_nolen_const (mg);
935
936 if (*s == '_')
624 } 937 {
625} 938 SV **svp = 0;
626 939
940 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
941 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
942
943 if (svp)
944 {
945 SV *old = *svp;
946 *svp = 0;
947 SvREFCNT_dec (old);
948 return 0;
949 }
950 }
951
952 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
953}
954
627static void 955static int
628setup_coro (void *arg) 956coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
957{
958 const char *s = MgPV_nolen_const (mg);
959
960 if (*s == '_')
961 {
962 SV **svp = 0;
963
964 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
965 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
966
967 if (svp)
968 {
969 SV *old = *svp;
970 *svp = SvOK (sv) ? newSVsv (sv) : 0;
971 SvREFCNT_dec (old);
972 return 0;
973 }
974 }
975
976 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
977}
978
979static void
980prepare_nop (pTHX_ struct coro_transfer_args *ta)
981{
982 /* kind of mega-hacky, but works */
983 ta->next = ta->prev = (struct coro *)ta;
984}
985
986static int
987slf_check_nop (pTHX_ struct CoroSLF *frame)
988{
989 return 0;
990}
991
992static int
993slf_check_repeat (pTHX_ struct CoroSLF *frame)
994{
995 return 1;
996}
997
998static UNOP init_perl_op;
999
1000static void NOINLINE /* noinline to keep it out of the transfer fast path */
1001init_perl (pTHX_ struct coro *coro)
629{ 1002{
630 /* 1003 /*
631 * emulate part of the perl startup here. 1004 * emulate part of the perl startup here.
632 */ 1005 */
1006 coro_init_stacks (aTHX);
1007
1008 PL_runops = RUNOPS_DEFAULT;
1009 PL_curcop = &PL_compiling;
1010 PL_in_eval = EVAL_NULL;
1011 PL_comppad = 0;
1012 PL_comppad_name = 0;
1013 PL_comppad_name_fill = 0;
1014 PL_comppad_name_floor = 0;
1015 PL_curpm = 0;
1016 PL_curpad = 0;
1017 PL_localizing = 0;
1018 PL_restartop = 0;
1019#if PERL_VERSION_ATLEAST (5,10,0)
1020 PL_parser = 0;
1021#endif
1022 PL_hints = 0;
1023
1024 /* recreate the die/warn hooks */
1025 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1026 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1027
1028 GvSV (PL_defgv) = newSV (0);
1029 GvAV (PL_defgv) = coro->args; coro->args = 0;
1030 GvSV (PL_errgv) = newSV (0);
1031 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1032 GvHV (PL_hintgv) = 0;
1033 PL_rs = newSVsv (GvSV (irsgv));
1034 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1035
1036 {
1037 dSP;
1038 UNOP myop;
1039
1040 Zero (&myop, 1, UNOP);
1041 myop.op_next = Nullop;
1042 myop.op_type = OP_ENTERSUB;
1043 myop.op_flags = OPf_WANT_VOID;
1044
1045 PUSHMARK (SP);
1046 PUSHs ((SV *)coro->startcv);
1047 PUTBACK;
1048 PL_op = (OP *)&myop;
1049 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1050 }
1051
1052 /* this newly created coroutine might be run on an existing cctx which most
1053 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1054 */
1055 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1056 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1057
1058 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1059 init_perl_op.op_next = PL_op;
1060 init_perl_op.op_type = OP_ENTERSUB;
1061 init_perl_op.op_ppaddr = pp_slf;
1062 /* no flags etc. required, as an init function won't be called */
1063
1064 PL_op = (OP *)&init_perl_op;
1065
1066 /* copy throw, in case it was set before init_perl */
1067 CORO_THROW = coro->except;
1068
1069 SWAP_SVS (coro);
1070
1071 if (expect_false (enable_times))
1072 {
1073 coro_times_update ();
1074 coro_times_sub (coro);
1075 }
1076}
1077
1078static void
1079coro_unwind_stacks (pTHX)
1080{
1081 if (!IN_DESTRUCT)
1082 {
1083 /* restore all saved variables and stuff */
1084 LEAVE_SCOPE (0);
1085 assert (PL_tmps_floor == -1);
1086
1087 /* free all temporaries */
1088 FREETMPS;
1089 assert (PL_tmps_ix == -1);
1090
1091 /* unwind all extra stacks */
1092 POPSTACK_TO (PL_mainstack);
1093
1094 /* unwind main stack */
1095 dounwind (-1);
1096 }
1097}
1098
1099static void
1100destroy_perl (pTHX_ struct coro *coro)
1101{
1102 SV *svf [9];
1103
1104 {
1105 struct coro *current = SvSTATE_current;
1106
1107 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1108
1109 save_perl (aTHX_ current);
1110 load_perl (aTHX_ coro);
1111
1112 coro_unwind_stacks (aTHX);
1113 coro_destruct_stacks (aTHX);
1114
1115 /* restore swapped sv's */
1116 SWAP_SVS (coro);
1117
1118 // now save some sv's to be free'd later
1119 svf [0] = GvSV (PL_defgv);
1120 svf [1] = (SV *)GvAV (PL_defgv);
1121 svf [2] = GvSV (PL_errgv);
1122 svf [3] = (SV *)PL_defoutgv;
1123 svf [4] = PL_rs;
1124 svf [5] = GvSV (irsgv);
1125 svf [6] = (SV *)GvHV (PL_hintgv);
1126 svf [7] = PL_diehook;
1127 svf [8] = PL_warnhook;
1128 assert (9 == sizeof (svf) / sizeof (*svf));
1129
1130 load_perl (aTHX_ current);
1131 }
1132
1133 {
1134 unsigned int i;
1135
1136 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1137 SvREFCNT_dec (svf [i]);
1138
1139 SvREFCNT_dec (coro->saved_deffh);
1140 SvREFCNT_dec (coro->rouse_cb);
1141 SvREFCNT_dec (coro->invoke_cb);
1142 SvREFCNT_dec (coro->invoke_av);
1143 }
1144}
1145
1146INLINE void
1147free_coro_mortal (pTHX)
1148{
1149 if (expect_true (coro_mortal))
1150 {
1151 SvREFCNT_dec (coro_mortal);
1152 coro_mortal = 0;
1153 }
1154}
1155
1156static int
1157runops_trace (pTHX)
1158{
1159 COP *oldcop = 0;
1160 int oldcxix = -2;
1161
1162 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1163 {
1164 PERL_ASYNC_CHECK ();
1165
1166 if (cctx_current->flags & CC_TRACE_ALL)
1167 {
1168 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1169 {
1170 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1171 SV **bot, **top;
1172 AV *av = newAV (); /* return values */
1173 SV **cb;
1174 dSP;
1175
1176 GV *gv = CvGV (cx->blk_sub.cv);
1177 SV *fullname = sv_2mortal (newSV (0));
1178 if (isGV (gv))
1179 gv_efullname3 (fullname, gv, 0);
1180
1181 bot = PL_stack_base + cx->blk_oldsp + 1;
1182 top = cx->blk_gimme == G_ARRAY ? SP + 1
1183 : cx->blk_gimme == G_SCALAR ? bot + 1
1184 : bot;
1185
1186 av_extend (av, top - bot);
1187 while (bot < top)
1188 av_push (av, SvREFCNT_inc_NN (*bot++));
1189
1190 PL_runops = RUNOPS_DEFAULT;
1191 ENTER;
1192 SAVETMPS;
1193 EXTEND (SP, 3);
1194 PUSHMARK (SP);
1195 PUSHs (&PL_sv_no);
1196 PUSHs (fullname);
1197 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1198 PUTBACK;
1199 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1200 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1201 SPAGAIN;
1202 FREETMPS;
1203 LEAVE;
1204 PL_runops = runops_trace;
1205 }
1206
1207 if (oldcop != PL_curcop)
1208 {
1209 oldcop = PL_curcop;
1210
1211 if (PL_curcop != &PL_compiling)
1212 {
1213 SV **cb;
1214
1215 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1216 {
1217 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1218
1219 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1220 {
1221 dSP;
1222 GV *gv = CvGV (cx->blk_sub.cv);
1223 SV *fullname = sv_2mortal (newSV (0));
1224
1225 if (isGV (gv))
1226 gv_efullname3 (fullname, gv, 0);
1227
1228 PL_runops = RUNOPS_DEFAULT;
1229 ENTER;
1230 SAVETMPS;
1231 EXTEND (SP, 3);
1232 PUSHMARK (SP);
1233 PUSHs (&PL_sv_yes);
1234 PUSHs (fullname);
1235 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1236 PUTBACK;
1237 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1238 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1239 SPAGAIN;
1240 FREETMPS;
1241 LEAVE;
1242 PL_runops = runops_trace;
1243 }
1244
1245 oldcxix = cxstack_ix;
1246 }
1247
1248 if (cctx_current->flags & CC_TRACE_LINE)
1249 {
1250 dSP;
1251
1252 PL_runops = RUNOPS_DEFAULT;
1253 ENTER;
1254 SAVETMPS;
1255 EXTEND (SP, 3);
1256 PL_runops = RUNOPS_DEFAULT;
1257 PUSHMARK (SP);
1258 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1259 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1260 PUTBACK;
1261 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1262 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1263 SPAGAIN;
1264 FREETMPS;
1265 LEAVE;
1266 PL_runops = runops_trace;
1267 }
1268 }
1269 }
1270 }
1271 }
1272
1273 TAINT_NOT;
1274 return 0;
1275}
1276
1277static struct CoroSLF cctx_ssl_frame;
1278
1279static void
1280slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1281{
1282 ta->prev = 0;
1283}
1284
1285static int
1286slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1287{
1288 *frame = cctx_ssl_frame;
1289
1290 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1291}
1292
1293/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1294static void NOINLINE
1295cctx_prepare (pTHX)
1296{
1297 PL_top_env = &PL_start_env;
1298
1299 if (cctx_current->flags & CC_TRACE)
1300 PL_runops = runops_trace;
1301
1302 /* we already must be executing an SLF op, there is no other valid way
1303 * that can lead to creation of a new cctx */
1304 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1305 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1306
1307 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1308 cctx_ssl_frame = slf_frame;
1309
1310 slf_frame.prepare = slf_prepare_set_stacklevel;
1311 slf_frame.check = slf_check_set_stacklevel;
1312}
1313
1314/* the tail of transfer: execute stuff we can only do after a transfer */
1315INLINE void
1316transfer_tail (pTHX)
1317{
1318 free_coro_mortal (aTHX);
1319}
1320
1321/*
1322 * this is a _very_ stripped down perl interpreter ;)
1323 */
1324static void
1325cctx_run (void *arg)
1326{
1327#ifdef USE_ITHREADS
1328# if CORO_PTHREAD
1329 PERL_SET_CONTEXT (coro_thx);
1330# endif
1331#endif
1332 {
1333 dTHX;
1334
1335 /* normally we would need to skip the entersub here */
1336 /* not doing so will re-execute it, which is exactly what we want */
1337 /* PL_nop = PL_nop->op_next */
1338
1339 /* inject a fake subroutine call to cctx_init */
1340 cctx_prepare (aTHX);
1341
1342 /* cctx_run is the alternative tail of transfer() */
1343 transfer_tail (aTHX);
1344
1345 /* somebody or something will hit me for both perl_run and PL_restartop */
1346 PL_restartop = PL_op;
1347 perl_run (PL_curinterp);
1348 /*
1349 * Unfortunately, there is no way to get at the return values of the
1350 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1351 * runtime errors here, as this is just a random interpreter, not a thread.
1352 */
1353
1354 /*
1355 * If perl-run returns we assume exit() was being called or the coro
1356 * fell off the end, which seems to be the only valid (non-bug)
1357 * reason for perl_run to return. We try to exit by jumping to the
1358 * bootstrap-time "top" top_env, as we cannot restore the "main"
1359 * coroutine as Coro has no such concept.
1360 * This actually isn't valid with the pthread backend, but OSes requiring
1361 * that backend are too broken to do it in a standards-compliant way.
1362 */
1363 PL_top_env = main_top_env;
1364 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1365 }
1366}
1367
1368static coro_cctx *
1369cctx_new ()
1370{
1371 coro_cctx *cctx;
1372
1373 ++cctx_count;
1374 New (0, cctx, 1, coro_cctx);
1375
1376 cctx->gen = cctx_gen;
1377 cctx->flags = 0;
1378 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1379
1380 return cctx;
1381}
1382
1383/* create a new cctx only suitable as source */
1384static coro_cctx *
1385cctx_new_empty ()
1386{
1387 coro_cctx *cctx = cctx_new ();
1388
1389 cctx->sptr = 0;
1390 coro_create (&cctx->cctx, 0, 0, 0, 0);
1391
1392 return cctx;
1393}
1394
1395/* create a new cctx suitable as destination/running a perl interpreter */
1396static coro_cctx *
1397cctx_new_run ()
1398{
1399 coro_cctx *cctx = cctx_new ();
1400 void *stack_start;
1401 size_t stack_size;
1402
1403#if HAVE_MMAP
1404 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1405 /* mmap supposedly does allocate-on-write for us */
1406 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1407
1408 if (cctx->sptr != (void *)-1)
1409 {
1410 #if CORO_STACKGUARD
1411 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1412 #endif
1413 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1414 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1415 cctx->flags |= CC_MAPPED;
1416 }
1417 else
1418#endif
1419 {
1420 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1421 New (0, cctx->sptr, cctx_stacksize, long);
1422
1423 if (!cctx->sptr)
1424 {
1425 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1426 _exit (EXIT_FAILURE);
1427 }
1428
1429 stack_start = cctx->sptr;
1430 stack_size = cctx->ssize;
1431 }
1432
1433 #if CORO_USE_VALGRIND
1434 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1435 #endif
1436
1437 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1438
1439 return cctx;
1440}
1441
1442static void
1443cctx_destroy (coro_cctx *cctx)
1444{
1445 if (!cctx)
1446 return;
1447
1448 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1449
1450 --cctx_count;
1451 coro_destroy (&cctx->cctx);
1452
1453 /* coro_transfer creates new, empty cctx's */
1454 if (cctx->sptr)
1455 {
1456 #if CORO_USE_VALGRIND
1457 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1458 #endif
1459
1460#if HAVE_MMAP
1461 if (cctx->flags & CC_MAPPED)
1462 munmap (cctx->sptr, cctx->ssize);
1463 else
1464#endif
1465 Safefree (cctx->sptr);
1466 }
1467
1468 Safefree (cctx);
1469}
1470
1471/* wether this cctx should be destructed */
1472#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1473
1474static coro_cctx *
1475cctx_get (pTHX)
1476{
1477 while (expect_true (cctx_first))
1478 {
1479 coro_cctx *cctx = cctx_first;
1480 cctx_first = cctx->next;
1481 --cctx_idle;
1482
1483 if (expect_true (!CCTX_EXPIRED (cctx)))
1484 return cctx;
1485
1486 cctx_destroy (cctx);
1487 }
1488
1489 return cctx_new_run ();
1490}
1491
1492static void
1493cctx_put (coro_cctx *cctx)
1494{
1495 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1496
1497 /* free another cctx if overlimit */
1498 if (expect_false (cctx_idle >= cctx_max_idle))
1499 {
1500 coro_cctx *first = cctx_first;
1501 cctx_first = first->next;
1502 --cctx_idle;
1503
1504 cctx_destroy (first);
1505 }
1506
1507 ++cctx_idle;
1508 cctx->next = cctx_first;
1509 cctx_first = cctx;
1510}
1511
1512/** coroutine switching *****************************************************/
1513
1514static void
1515transfer_check (pTHX_ struct coro *prev, struct coro *next)
1516{
1517 /* TODO: throwing up here is considered harmful */
1518
1519 if (expect_true (prev != next))
1520 {
1521 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1522 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1523
1524 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1525 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1526
1527#if !PERL_VERSION_ATLEAST (5,10,0)
1528 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1529 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1530#endif
1531 }
1532}
1533
1534/* always use the TRANSFER macro */
1535static void NOINLINE /* noinline so we have a fixed stackframe */
1536transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1537{
1538 dSTACKLEVEL;
1539
1540 /* sometimes transfer is only called to set idle_sp */
1541 if (expect_false (!prev))
1542 {
1543 cctx_current->idle_sp = STACKLEVEL;
1544 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1545 }
1546 else if (expect_true (prev != next))
1547 {
1548 coro_cctx *cctx_prev;
1549
1550 if (expect_false (prev->flags & CF_NEW))
1551 {
1552 /* create a new empty/source context */
1553 prev->flags &= ~CF_NEW;
1554 prev->flags |= CF_RUNNING;
1555 }
1556
1557 prev->flags &= ~CF_RUNNING;
1558 next->flags |= CF_RUNNING;
1559
1560 /* first get rid of the old state */
1561 save_perl (aTHX_ prev);
1562
1563 if (expect_false (next->flags & CF_NEW))
1564 {
1565 /* need to start coroutine */
1566 next->flags &= ~CF_NEW;
1567 /* setup coroutine call */
1568 init_perl (aTHX_ next);
1569 }
1570 else
1571 load_perl (aTHX_ next);
1572
1573 /* possibly untie and reuse the cctx */
1574 if (expect_true (
1575 cctx_current->idle_sp == STACKLEVEL
1576 && !(cctx_current->flags & CC_TRACE)
1577 && !force_cctx
1578 ))
1579 {
1580 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1581 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1582
1583 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1584 /* without this the next cctx_get might destroy the running cctx while still in use */
1585 if (expect_false (CCTX_EXPIRED (cctx_current)))
1586 if (expect_true (!next->cctx))
1587 next->cctx = cctx_get (aTHX);
1588
1589 cctx_put (cctx_current);
1590 }
1591 else
1592 prev->cctx = cctx_current;
1593
1594 ++next->usecount;
1595
1596 cctx_prev = cctx_current;
1597 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1598
1599 next->cctx = 0;
1600
1601 if (expect_false (cctx_prev != cctx_current))
1602 {
1603 cctx_prev->top_env = PL_top_env;
1604 PL_top_env = cctx_current->top_env;
1605 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1606 }
1607
1608 transfer_tail (aTHX);
1609 }
1610}
1611
1612#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1613#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1614
1615/** high level stuff ********************************************************/
1616
1617static int
1618coro_state_destroy (pTHX_ struct coro *coro)
1619{
1620 if (coro->flags & CF_DESTROYED)
1621 return 0;
1622
1623 if (coro->on_destroy && !PL_dirty)
1624 coro->on_destroy (aTHX_ coro);
1625
1626 coro->flags |= CF_DESTROYED;
1627
1628 if (coro->flags & CF_READY)
1629 {
1630 /* reduce nready, as destroying a ready coro effectively unreadies it */
1631 /* alternative: look through all ready queues and remove the coro */
1632 --coro_nready;
1633 }
1634 else
1635 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1636
1637 if (coro->mainstack
1638 && coro->mainstack != main_mainstack
1639 && coro->slot
1640 && !PL_dirty)
1641 destroy_perl (aTHX_ coro);
1642
1643 if (coro->next) coro->next->prev = coro->prev;
1644 if (coro->prev) coro->prev->next = coro->next;
1645 if (coro == coro_first) coro_first = coro->next;
1646
1647 cctx_destroy (coro->cctx);
1648 SvREFCNT_dec (coro->startcv);
1649 SvREFCNT_dec (coro->args);
1650 SvREFCNT_dec (coro->swap_sv);
1651 SvREFCNT_dec (CORO_THROW);
1652
1653 return 1;
1654}
1655
1656static int
1657coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1658{
1659 struct coro *coro = (struct coro *)mg->mg_ptr;
1660 mg->mg_ptr = 0;
1661
1662 coro->hv = 0;
1663
1664 if (--coro->refcnt < 0)
1665 {
1666 coro_state_destroy (aTHX_ coro);
1667 Safefree (coro);
1668 }
1669
1670 return 0;
1671}
1672
1673static int
1674coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1675{
1676 struct coro *coro = (struct coro *)mg->mg_ptr;
1677
1678 ++coro->refcnt;
1679
1680 return 0;
1681}
1682
1683static MGVTBL coro_state_vtbl = {
1684 0, 0, 0, 0,
1685 coro_state_free,
1686 0,
1687#ifdef MGf_DUP
1688 coro_state_dup,
1689#else
1690# define MGf_DUP 0
1691#endif
1692};
1693
1694static void
1695prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1696{
1697 ta->prev = SvSTATE (prev_sv);
1698 ta->next = SvSTATE (next_sv);
1699 TRANSFER_CHECK (*ta);
1700}
1701
1702static void
1703api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1704{
1705 struct coro_transfer_args ta;
1706
1707 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1708 TRANSFER (ta, 1);
1709}
1710
1711/** Coro ********************************************************************/
1712
1713INLINE void
1714coro_enq (pTHX_ struct coro *coro)
1715{
1716 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1717
1718 SvREFCNT_inc_NN (coro->hv);
1719
1720 coro->next_ready = 0;
1721 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1722 ready [1] = coro;
1723}
1724
1725INLINE struct coro *
1726coro_deq (pTHX)
1727{
1728 int prio;
1729
1730 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1731 {
1732 struct coro **ready = coro_ready [prio];
1733
1734 if (ready [0])
1735 {
1736 struct coro *coro = ready [0];
1737 ready [0] = coro->next_ready;
1738 return coro;
1739 }
1740 }
1741
1742 return 0;
1743}
1744
1745static void
1746invoke_sv_ready_hook_helper (void)
1747{
633 dTHX; 1748 dTHX;
634 dSP; 1749 dSP;
635 Coro__State ctx = (Coro__State)arg;
636 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
637 1750
638 coro_init_stacks (aTHX); 1751 ENTER;
639 /*PL_curcop = 0;*/ 1752 SAVETMPS;
640 /*PL_in_eval = PL_in_eval;*/ /* inherit */
641 SvREFCNT_dec (GvAV (PL_defgv));
642 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
643 1753
644 SPAGAIN;
645
646 if (ctx->stack)
647 {
648 ctx->cursp = 0;
649
650 PUSHMARK(SP); 1754 PUSHMARK (SP);
651 PUTBACK; 1755 PUTBACK;
652 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1756 call_sv (coro_readyhook, G_VOID | G_DISCARD);
653 1757
654 if (SvTRUE (ERRSV)) 1758 FREETMPS;
655 croak (NULL); 1759 LEAVE;
656 else 1760}
657 croak ("FATAL: CCTXT coroutine returned!"); 1761
1762static int
1763api_ready (pTHX_ SV *coro_sv)
1764{
1765 struct coro *coro = SvSTATE (coro_sv);
1766
1767 if (coro->flags & CF_READY)
1768 return 0;
1769
1770 coro->flags |= CF_READY;
1771
1772 coro_enq (aTHX_ coro);
1773
1774 if (!coro_nready++)
1775 if (coroapi.readyhook)
1776 coroapi.readyhook ();
1777
1778 return 1;
1779}
1780
1781static int
1782api_is_ready (pTHX_ SV *coro_sv)
1783{
1784 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1785}
1786
1787/* expects to own a reference to next->hv */
1788INLINE void
1789prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1790{
1791 SV *prev_sv = SvRV (coro_current);
1792
1793 ta->prev = SvSTATE_hv (prev_sv);
1794 ta->next = next;
1795
1796 TRANSFER_CHECK (*ta);
1797
1798 SvRV_set (coro_current, (SV *)next->hv);
1799
1800 free_coro_mortal (aTHX);
1801 coro_mortal = prev_sv;
1802}
1803
1804static void
1805prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1806{
1807 for (;;)
658 } 1808 {
659 else 1809 struct coro *next = coro_deq (aTHX);
660 {
661 UNOP myop;
662 1810
663 PL_op = (OP *)&myop; 1811 if (expect_true (next))
664
665 Zero(&myop, 1, UNOP);
666 myop.op_next = Nullop;
667 myop.op_flags = OPf_WANT_VOID;
668
669 PUSHMARK(SP);
670 XPUSHs (sub_init);
671 /*
672 * the next line is slightly wrong, as PL_op->op_next
673 * is actually being executed so we skip the first op.
674 * that doesn't matter, though, since it is only
675 * pp_nextstate and we never return...
676 * ah yes, and I don't care anyways ;)
677 */
678 PUTBACK;
679 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
680 SPAGAIN;
681
682 ENTER; /* necessary e.g. for dounwind */
683 }
684}
685
686static void
687continue_coro (void *arg)
688{
689 /*
690 * this is a _very_ stripped down perl interpreter ;)
691 */
692 dTHX;
693 Coro__State ctx = (Coro__State)arg;
694 JMPENV coro_start_env;
695
696 PL_top_env = &ctx->start_env;
697
698 ctx->cursp = 0;
699 PL_op = PL_op->op_next;
700 CALLRUNOPS(aTHX);
701
702 abort ();
703}
704
705STATIC void
706transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
707{
708 dSTACKLEVEL;
709
710 if (prev != next)
711 {
712 if (next->mainstack)
713 { 1812 {
714 LOCK; 1813 /* cannot transfer to destroyed coros, skip and look for next */
715 SAVE (prev, flags); 1814 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
716 LOAD (next); 1815 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
717 UNLOCK; 1816 else
718
719 /* mark this state as in-use */
720 next->mainstack = 0;
721 next->tmps_ix = -2;
722
723 /* stacklevel changed? if yes, grab the stack for us! */
724 if (flags & TRANSFER_SAVE_CCTXT)
725 { 1817 {
726 if (!prev->stack) 1818 next->flags &= ~CF_READY;
727 allocate_stack (prev, 0); 1819 --coro_nready;
728 else if (prev->cursp != stacklevel 1820
729 && prev->stack->usecnt > 1) 1821 prepare_schedule_to (aTHX_ ta, next);
730 { 1822 break;
731 prev->gencnt = ++prev->stack->gencnt;
732 prev->stack->usecnt = 1;
733 }
734
735 /* has our stack been invalidated? */
736 if (next->stack && next->stack->gencnt != next->gencnt)
737 {
738 deallocate_stack (next);
739 allocate_stack (next, 1);
740 coro_create (&(next->stack->cctx),
741 continue_coro, (void *)next,
742 next->stack->sptr, labs (next->stack->ssize));
743 }
744
745 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
746 prev->cursp = stacklevel;
747 /* don't add any code here */
748 } 1823 }
749 else
750 next->cursp = stacklevel;
751 } 1824 }
752 else if (next->tmps_ix == -2)
753 croak ("tried to transfer to running coroutine");
754 else 1825 else
755 { 1826 {
756 LOCK; 1827 /* nothing to schedule: call the idle handler */
757 SAVE (prev, -1); /* first get rid of the old state */ 1828 if (SvROK (sv_idle)
758 UNLOCK; 1829 && SvOBJECT (SvRV (sv_idle)))
759
760 if (flags & TRANSFER_SAVE_CCTXT)
761 { 1830 {
762 if (!prev->stack) 1831 if (SvRV (sv_idle) == SvRV (coro_current))
763 allocate_stack (prev, 0); 1832 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
764 1833
765 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1834 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
766 { 1835 api_ready (aTHX_ SvRV (sv_idle));
767 PL_top_env = &next->start_env; 1836 --coro_nready;
768
769 setup_coro (next);
770 next->cursp = stacklevel;
771
772 prev->stack->refcnt++;
773 prev->stack->usecnt++;
774 next->stack = prev->stack;
775 next->gencnt = prev->gencnt;
776 }
777 else
778 {
779 assert (!next->stack);
780 allocate_stack (next, 1);
781 coro_create (&(next->stack->cctx),
782 setup_coro, (void *)next,
783 next->stack->sptr, labs (next->stack->ssize));
784 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
785 prev->cursp = stacklevel;
786 /* don't add any code here */
787 }
788 } 1837 }
789 else 1838 else
790 { 1839 {
791 setup_coro (next); 1840 /* TODO: deprecated, remove, cannot work reliably *//*D*/
792 next->cursp = stacklevel; 1841 dSP;
1842
1843 ENTER;
1844 SAVETMPS;
1845
1846 PUSHMARK (SP);
1847 PUTBACK;
1848 call_sv (sv_idle, G_VOID | G_DISCARD);
1849
1850 FREETMPS;
1851 LEAVE;
793 } 1852 }
794 } 1853 }
795 } 1854 }
1855}
796 1856
797 LOCK; 1857INLINE void
1858prepare_cede (pTHX_ struct coro_transfer_args *ta)
1859{
1860 api_ready (aTHX_ coro_current);
1861 prepare_schedule (aTHX_ ta);
1862}
1863
1864INLINE void
1865prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1866{
1867 SV *prev = SvRV (coro_current);
1868
798 if (coro_mortal) 1869 if (coro_nready)
799 {
800 SvREFCNT_dec (coro_mortal);
801 coro_mortal = 0;
802 } 1870 {
803 UNLOCK; 1871 prepare_schedule (aTHX_ ta);
804} 1872 api_ready (aTHX_ prev);
805
806#define SV_CORO(sv,func) \
807 do { \
808 if (SvROK (sv)) \
809 sv = SvRV (sv); \
810 \
811 if (SvTYPE (sv) == SVt_PVHV) \
812 { \
813 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
814 \
815 if (!he) \
816 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
817 \
818 (sv) = SvRV (HeVAL(he)); \
819 } \
820 \
821 /* must also be changed inside Coro::Cont::yield */ \
822 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
823 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
824 \
825 } while(0)
826
827#define SvSTATE(sv) (struct coro *)SvIV (sv)
828
829static void
830api_transfer(pTHX_ SV *prev, SV *next, int flags)
831{
832 SV_CORO (prev, "Coro::transfer");
833 SV_CORO (next, "Coro::transfer");
834
835 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
836}
837
838/** Coro ********************************************************************/
839
840#define PRIO_MAX 3
841#define PRIO_HIGH 1
842#define PRIO_NORMAL 0
843#define PRIO_LOW -1
844#define PRIO_IDLE -3
845#define PRIO_MIN -4
846
847/* for Coro.pm */
848static GV *coro_current, *coro_idle;
849static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
850static int coro_nready;
851
852static void
853coro_enq (pTHX_ SV *sv)
854{
855 if (SvTYPE (sv) == SVt_PVHV)
856 { 1873 }
857 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1874 else
858 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1875 prepare_nop (aTHX_ ta);
1876}
859 1877
860 prio = prio > PRIO_MAX ? PRIO_MAX 1878static void
861 : prio < PRIO_MIN ? PRIO_MIN 1879api_schedule (pTHX)
862 : prio; 1880{
1881 struct coro_transfer_args ta;
863 1882
864 av_push (coro_ready [prio - PRIO_MIN], sv); 1883 prepare_schedule (aTHX_ &ta);
865 coro_nready++; 1884 TRANSFER (ta, 1);
1885}
866 1886
1887static void
1888api_schedule_to (pTHX_ SV *coro_sv)
1889{
1890 struct coro_transfer_args ta;
1891 struct coro *next = SvSTATE (coro_sv);
1892
1893 SvREFCNT_inc_NN (coro_sv);
1894 prepare_schedule_to (aTHX_ &ta, next);
1895}
1896
1897static int
1898api_cede (pTHX)
1899{
1900 struct coro_transfer_args ta;
1901
1902 prepare_cede (aTHX_ &ta);
1903
1904 if (expect_true (ta.prev != ta.next))
1905 {
1906 TRANSFER (ta, 1);
867 return; 1907 return 1;
1908 }
1909 else
1910 return 0;
1911}
1912
1913static int
1914api_cede_notself (pTHX)
1915{
1916 if (coro_nready)
1917 {
1918 struct coro_transfer_args ta;
1919
1920 prepare_cede_notself (aTHX_ &ta);
1921 TRANSFER (ta, 1);
1922 return 1;
1923 }
1924 else
1925 return 0;
1926}
1927
1928static void
1929api_trace (pTHX_ SV *coro_sv, int flags)
1930{
1931 struct coro *coro = SvSTATE (coro_sv);
1932
1933 if (coro->flags & CF_RUNNING)
1934 croak ("cannot enable tracing on a running coroutine, caught");
1935
1936 if (flags & CC_TRACE)
1937 {
1938 if (!coro->cctx)
1939 coro->cctx = cctx_new_run ();
1940 else if (!(coro->cctx->flags & CC_TRACE))
1941 croak ("cannot enable tracing on coroutine with custom stack, caught");
1942
1943 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1944 }
1945 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1946 {
1947 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1948
1949 if (coro->flags & CF_RUNNING)
1950 PL_runops = RUNOPS_DEFAULT;
1951 else
1952 coro->slot->runops = RUNOPS_DEFAULT;
1953 }
1954}
1955
1956static void
1957coro_call_on_destroy (pTHX_ struct coro *coro)
1958{
1959 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1960 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1961
1962 if (on_destroyp)
1963 {
1964 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1965
1966 while (AvFILLp (on_destroy) >= 0)
1967 {
1968 dSP; /* don't disturb outer sp */
1969 SV *cb = av_pop (on_destroy);
1970
1971 PUSHMARK (SP);
1972
1973 if (statusp)
1974 {
1975 int i;
1976 AV *status = (AV *)SvRV (*statusp);
1977 EXTEND (SP, AvFILLp (status) + 1);
1978
1979 for (i = 0; i <= AvFILLp (status); ++i)
1980 PUSHs (AvARRAY (status)[i]);
1981 }
1982
1983 PUTBACK;
1984 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1985 }
1986 }
1987}
1988
1989static void
1990slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1991{
1992 int i;
1993 HV *hv = (HV *)SvRV (coro_current);
1994 AV *av = newAV ();
1995
1996 /* items are actually not so common, so optimise for this case */
1997 if (items)
1998 {
1999 av_extend (av, items - 1);
2000
2001 for (i = 0; i < items; ++i)
2002 av_push (av, SvREFCNT_inc_NN (arg [i]));
2003 }
2004
2005 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2006
2007 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2008 api_ready (aTHX_ sv_manager);
2009
2010 frame->prepare = prepare_schedule;
2011 frame->check = slf_check_repeat;
2012
2013 /* as a minor optimisation, we could unwind all stacks here */
2014 /* but that puts extra pressure on pp_slf, and is not worth much */
2015 /*coro_unwind_stacks (aTHX);*/
2016}
2017
2018/*****************************************************************************/
2019/* async pool handler */
2020
2021static int
2022slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2023{
2024 HV *hv = (HV *)SvRV (coro_current);
2025 struct coro *coro = (struct coro *)frame->data;
2026
2027 if (!coro->invoke_cb)
2028 return 1; /* loop till we have invoke */
2029 else
2030 {
2031 hv_store (hv, "desc", sizeof ("desc") - 1,
2032 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2033
2034 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2035
2036 {
2037 dSP;
2038 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2039 PUTBACK;
868 } 2040 }
869 2041
870 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2042 SvREFCNT_dec (GvAV (PL_defgv));
2043 GvAV (PL_defgv) = coro->invoke_av;
2044 coro->invoke_av = 0;
2045
2046 return 0;
2047 }
2048}
2049
2050static void
2051slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2052{
2053 HV *hv = (HV *)SvRV (coro_current);
2054 struct coro *coro = SvSTATE_hv ((SV *)hv);
2055
2056 if (expect_true (coro->saved_deffh))
2057 {
2058 /* subsequent iteration */
2059 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2060 coro->saved_deffh = 0;
2061
2062 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2063 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2064 {
2065 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2066 coro->invoke_av = newAV ();
2067
2068 frame->prepare = prepare_nop;
2069 }
2070 else
2071 {
2072 av_clear (GvAV (PL_defgv));
2073 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2074
2075 coro->prio = 0;
2076
2077 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2078 api_trace (aTHX_ coro_current, 0);
2079
2080 frame->prepare = prepare_schedule;
2081 av_push (av_async_pool, SvREFCNT_inc (hv));
2082 }
2083 }
2084 else
2085 {
2086 /* first iteration, simply fall through */
2087 frame->prepare = prepare_nop;
2088 }
2089
2090 frame->check = slf_check_pool_handler;
2091 frame->data = (void *)coro;
2092}
2093
2094/*****************************************************************************/
2095/* rouse callback */
2096
2097#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2098
2099static void
2100coro_rouse_callback (pTHX_ CV *cv)
2101{
2102 dXSARGS;
2103 SV *data = (SV *)S_GENSUB_ARG;
2104
2105 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2106 {
2107 /* first call, set args */
2108 SV *coro = SvRV (data);
2109 AV *av = newAV ();
2110
2111 SvRV_set (data, (SV *)av);
2112
2113 /* better take a full copy of the arguments */
2114 while (items--)
2115 av_store (av, items, newSVsv (ST (items)));
2116
2117 api_ready (aTHX_ coro);
2118 SvREFCNT_dec (coro);
2119 }
2120
2121 XSRETURN_EMPTY;
2122}
2123
2124static int
2125slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2126{
2127 SV *data = (SV *)frame->data;
2128
2129 if (CORO_THROW)
2130 return 0;
2131
2132 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2133 return 1;
2134
2135 /* now push all results on the stack */
2136 {
2137 dSP;
2138 AV *av = (AV *)SvRV (data);
2139 int i;
2140
2141 EXTEND (SP, AvFILLp (av) + 1);
2142 for (i = 0; i <= AvFILLp (av); ++i)
2143 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2144
2145 /* we have stolen the elements, so set length to zero and free */
2146 AvFILLp (av) = -1;
2147 av_undef (av);
2148
2149 PUTBACK;
2150 }
2151
2152 return 0;
2153}
2154
2155static void
2156slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2157{
2158 SV *cb;
2159
2160 if (items)
2161 cb = arg [0];
2162 else
2163 {
2164 struct coro *coro = SvSTATE_current;
2165
2166 if (!coro->rouse_cb)
2167 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2168
2169 cb = sv_2mortal (coro->rouse_cb);
2170 coro->rouse_cb = 0;
2171 }
2172
2173 if (!SvROK (cb)
2174 || SvTYPE (SvRV (cb)) != SVt_PVCV
2175 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2176 croak ("Coro::rouse_wait called with illegal callback argument,");
2177
2178 {
2179 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2180 SV *data = (SV *)S_GENSUB_ARG;
2181
2182 frame->data = (void *)data;
2183 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2184 frame->check = slf_check_rouse_wait;
2185 }
871} 2186}
872 2187
873static SV * 2188static SV *
874coro_deq (pTHX_ int min_prio) 2189coro_new_rouse_cb (pTHX)
875{ 2190{
876 int prio = PRIO_MAX - PRIO_MIN; 2191 HV *hv = (HV *)SvRV (coro_current);
2192 struct coro *coro = SvSTATE_hv (hv);
2193 SV *data = newRV_inc ((SV *)hv);
2194 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
877 2195
878 min_prio -= PRIO_MIN; 2196 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
879 if (min_prio < 0) 2197 SvREFCNT_dec (data); /* magicext increases the refcount */
880 min_prio = 0;
881 2198
882 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2199 SvREFCNT_dec (coro->rouse_cb);
883 if (av_len (coro_ready[prio]) >= 0) 2200 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2201
2202 return cb;
2203}
2204
2205/*****************************************************************************/
2206/* schedule-like-function opcode (SLF) */
2207
2208static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2209static const CV *slf_cv;
2210static SV **slf_argv;
2211static int slf_argc, slf_arga; /* count, allocated */
2212static I32 slf_ax; /* top of stack, for restore */
2213
2214/* this restores the stack in the case we patched the entersub, to */
2215/* recreate the stack frame as perl will on following calls */
2216/* since entersub cleared the stack */
2217static OP *
2218pp_restore (pTHX)
2219{
2220 int i;
2221 SV **SP = PL_stack_base + slf_ax;
2222
2223 PUSHMARK (SP);
2224
2225 EXTEND (SP, slf_argc + 1);
2226
2227 for (i = 0; i < slf_argc; ++i)
2228 PUSHs (sv_2mortal (slf_argv [i]));
2229
2230 PUSHs ((SV *)CvGV (slf_cv));
2231
2232 RETURNOP (slf_restore.op_first);
2233}
2234
2235static void
2236slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2237{
2238 SV **arg = (SV **)slf_frame.data;
2239
2240 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2241}
2242
2243static void
2244slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2245{
2246 if (items != 2)
2247 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2248
2249 frame->prepare = slf_prepare_transfer;
2250 frame->check = slf_check_nop;
2251 frame->data = (void *)arg; /* let's hope it will stay valid */
2252}
2253
2254static void
2255slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2256{
2257 frame->prepare = prepare_schedule;
2258 frame->check = slf_check_nop;
2259}
2260
2261static void
2262slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2263{
2264 struct coro *next = (struct coro *)slf_frame.data;
2265
2266 SvREFCNT_inc_NN (next->hv);
2267 prepare_schedule_to (aTHX_ ta, next);
2268}
2269
2270static void
2271slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2272{
2273 if (!items)
2274 croak ("Coro::schedule_to expects a coroutine argument, caught");
2275
2276 frame->data = (void *)SvSTATE (arg [0]);
2277 frame->prepare = slf_prepare_schedule_to;
2278 frame->check = slf_check_nop;
2279}
2280
2281static void
2282slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2283{
2284 api_ready (aTHX_ SvRV (coro_current));
2285
2286 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2287}
2288
2289static void
2290slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2291{
2292 frame->prepare = prepare_cede;
2293 frame->check = slf_check_nop;
2294}
2295
2296static void
2297slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2298{
2299 frame->prepare = prepare_cede_notself;
2300 frame->check = slf_check_nop;
2301}
2302
2303/*
2304 * these not obviously related functions are all rolled into one
2305 * function to increase chances that they all will call transfer with the same
2306 * stack offset
2307 * SLF stands for "schedule-like-function".
2308 */
2309static OP *
2310pp_slf (pTHX)
2311{
2312 I32 checkmark; /* mark SP to see how many elements check has pushed */
2313
2314 /* set up the slf frame, unless it has already been set-up */
2315 /* the latter happens when a new coro has been started */
2316 /* or when a new cctx was attached to an existing coroutine */
2317 if (expect_true (!slf_frame.prepare))
2318 {
2319 /* first iteration */
2320 dSP;
2321 SV **arg = PL_stack_base + TOPMARK + 1;
2322 int items = SP - arg; /* args without function object */
2323 SV *gv = *sp;
2324
2325 /* do a quick consistency check on the "function" object, and if it isn't */
2326 /* for us, divert to the real entersub */
2327 if (SvTYPE (gv) != SVt_PVGV
2328 || !GvCV (gv)
2329 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2330 return PL_ppaddr[OP_ENTERSUB](aTHX);
2331
2332 if (!(PL_op->op_flags & OPf_STACKED))
884 { 2333 {
885 coro_nready--; 2334 /* ampersand-form of call, use @_ instead of stack */
886 return av_shift (coro_ready[prio]); 2335 AV *av = GvAV (PL_defgv);
2336 arg = AvARRAY (av);
2337 items = AvFILLp (av) + 1;
887 } 2338 }
2339
2340 /* now call the init function, which needs to set up slf_frame */
2341 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2342 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2343
2344 /* pop args */
2345 SP = PL_stack_base + POPMARK;
2346
2347 PUTBACK;
2348 }
2349
2350 /* now that we have a slf_frame, interpret it! */
2351 /* we use a callback system not to make the code needlessly */
2352 /* complicated, but so we can run multiple perl coros from one cctx */
2353
2354 do
2355 {
2356 struct coro_transfer_args ta;
2357
2358 slf_frame.prepare (aTHX_ &ta);
2359 TRANSFER (ta, 0);
2360
2361 checkmark = PL_stack_sp - PL_stack_base;
2362 }
2363 while (slf_frame.check (aTHX_ &slf_frame));
2364
2365 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2366
2367 /* exception handling */
2368 if (expect_false (CORO_THROW))
2369 {
2370 SV *exception = sv_2mortal (CORO_THROW);
2371
2372 CORO_THROW = 0;
2373 sv_setsv (ERRSV, exception);
2374 croak (0);
2375 }
2376
2377 /* return value handling - mostly like entersub */
2378 /* make sure we put something on the stack in scalar context */
2379 if (GIMME_V == G_SCALAR)
2380 {
2381 dSP;
2382 SV **bot = PL_stack_base + checkmark;
2383
2384 if (sp == bot) /* too few, push undef */
2385 bot [1] = &PL_sv_undef;
2386 else if (sp != bot + 1) /* too many, take last one */
2387 bot [1] = *sp;
2388
2389 SP = bot + 1;
2390
2391 PUTBACK;
2392 }
2393
2394 return NORMAL;
2395}
2396
2397static void
2398api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2399{
2400 int i;
2401 SV **arg = PL_stack_base + ax;
2402 int items = PL_stack_sp - arg + 1;
2403
2404 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2405
2406 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2407 && PL_op->op_ppaddr != pp_slf)
2408 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2409
2410 CvFLAGS (cv) |= CVf_SLF;
2411 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2412 slf_cv = cv;
2413
2414 /* we patch the op, and then re-run the whole call */
2415 /* we have to put the same argument on the stack for this to work */
2416 /* and this will be done by pp_restore */
2417 slf_restore.op_next = (OP *)&slf_restore;
2418 slf_restore.op_type = OP_CUSTOM;
2419 slf_restore.op_ppaddr = pp_restore;
2420 slf_restore.op_first = PL_op;
2421
2422 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2423
2424 if (PL_op->op_flags & OPf_STACKED)
2425 {
2426 if (items > slf_arga)
2427 {
2428 slf_arga = items;
2429 Safefree (slf_argv);
2430 New (0, slf_argv, slf_arga, SV *);
2431 }
2432
2433 slf_argc = items;
2434
2435 for (i = 0; i < items; ++i)
2436 slf_argv [i] = SvREFCNT_inc (arg [i]);
2437 }
2438 else
2439 slf_argc = 0;
2440
2441 PL_op->op_ppaddr = pp_slf;
2442 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2443
2444 PL_op = (OP *)&slf_restore;
2445}
2446
2447/*****************************************************************************/
2448/* dynamic wind */
2449
2450static void
2451on_enterleave_call (pTHX_ SV *cb)
2452{
2453 dSP;
2454
2455 PUSHSTACK;
2456
2457 PUSHMARK (SP);
2458 PUTBACK;
2459 call_sv (cb, G_VOID | G_DISCARD);
2460 SPAGAIN;
2461
2462 POPSTACK;
2463}
2464
2465static SV *
2466coro_avp_pop_and_free (pTHX_ AV **avp)
2467{
2468 AV *av = *avp;
2469 SV *res = av_pop (av);
2470
2471 if (AvFILLp (av) < 0)
2472 {
2473 *avp = 0;
2474 SvREFCNT_dec (av);
2475 }
2476
2477 return res;
2478}
2479
2480static void
2481coro_pop_on_enter (pTHX_ void *coro)
2482{
2483 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2484 SvREFCNT_dec (cb);
2485}
2486
2487static void
2488coro_pop_on_leave (pTHX_ void *coro)
2489{
2490 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2491 on_enterleave_call (aTHX_ sv_2mortal (cb));
2492}
2493
2494/*****************************************************************************/
2495/* PerlIO::cede */
2496
2497typedef struct
2498{
2499 PerlIOBuf base;
2500 NV next, every;
2501} PerlIOCede;
2502
2503static IV
2504PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2505{
2506 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2507
2508 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2509 self->next = nvtime () + self->every;
2510
2511 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2512}
2513
2514static SV *
2515PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2516{
2517 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2518
2519 return newSVnv (self->every);
2520}
2521
2522static IV
2523PerlIOCede_flush (pTHX_ PerlIO *f)
2524{
2525 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2526 double now = nvtime ();
2527
2528 if (now >= self->next)
2529 {
2530 api_cede (aTHX);
2531 self->next = now + self->every;
2532 }
2533
2534 return PerlIOBuf_flush (aTHX_ f);
2535}
2536
2537static PerlIO_funcs PerlIO_cede =
2538{
2539 sizeof(PerlIO_funcs),
2540 "cede",
2541 sizeof(PerlIOCede),
2542 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2543 PerlIOCede_pushed,
2544 PerlIOBuf_popped,
2545 PerlIOBuf_open,
2546 PerlIOBase_binmode,
2547 PerlIOCede_getarg,
2548 PerlIOBase_fileno,
2549 PerlIOBuf_dup,
2550 PerlIOBuf_read,
2551 PerlIOBuf_unread,
2552 PerlIOBuf_write,
2553 PerlIOBuf_seek,
2554 PerlIOBuf_tell,
2555 PerlIOBuf_close,
2556 PerlIOCede_flush,
2557 PerlIOBuf_fill,
2558 PerlIOBase_eof,
2559 PerlIOBase_error,
2560 PerlIOBase_clearerr,
2561 PerlIOBase_setlinebuf,
2562 PerlIOBuf_get_base,
2563 PerlIOBuf_bufsiz,
2564 PerlIOBuf_get_ptr,
2565 PerlIOBuf_get_cnt,
2566 PerlIOBuf_set_ptrcnt,
2567};
2568
2569/*****************************************************************************/
2570/* Coro::Semaphore & Coro::Signal */
2571
2572static SV *
2573coro_waitarray_new (pTHX_ int count)
2574{
2575 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2576 AV *av = newAV ();
2577 SV **ary;
2578
2579 /* unfortunately, building manually saves memory */
2580 Newx (ary, 2, SV *);
2581 AvALLOC (av) = ary;
2582#if PERL_VERSION_ATLEAST (5,10,0)
2583 AvARRAY (av) = ary;
2584#else
2585 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2586 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2587 SvPVX ((SV *)av) = (char *)ary;
2588#endif
2589 AvMAX (av) = 1;
2590 AvFILLp (av) = 0;
2591 ary [0] = newSViv (count);
2592
2593 return newRV_noinc ((SV *)av);
2594}
2595
2596/* semaphore */
2597
2598static void
2599coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2600{
2601 SV *count_sv = AvARRAY (av)[0];
2602 IV count = SvIVX (count_sv);
2603
2604 count += adjust;
2605 SvIVX (count_sv) = count;
2606
2607 /* now wake up as many waiters as are expected to lock */
2608 while (count > 0 && AvFILLp (av) > 0)
2609 {
2610 SV *cb;
2611
2612 /* swap first two elements so we can shift a waiter */
2613 AvARRAY (av)[0] = AvARRAY (av)[1];
2614 AvARRAY (av)[1] = count_sv;
2615 cb = av_shift (av);
2616
2617 if (SvOBJECT (cb))
2618 {
2619 api_ready (aTHX_ cb);
2620 --count;
2621 }
2622 else if (SvTYPE (cb) == SVt_PVCV)
2623 {
2624 dSP;
2625 PUSHMARK (SP);
2626 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2627 PUTBACK;
2628 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2629 }
2630
2631 SvREFCNT_dec (cb);
2632 }
2633}
2634
2635static void
2636coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2637{
2638 /* call $sem->adjust (0) to possibly wake up some other waiters */
2639 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2640}
2641
2642static int
2643slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2644{
2645 AV *av = (AV *)frame->data;
2646 SV *count_sv = AvARRAY (av)[0];
2647
2648 /* if we are about to throw, don't actually acquire the lock, just throw */
2649 if (CORO_THROW)
2650 return 0;
2651 else if (SvIVX (count_sv) > 0)
2652 {
2653 SvSTATE_current->on_destroy = 0;
2654
2655 if (acquire)
2656 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2657 else
2658 coro_semaphore_adjust (aTHX_ av, 0);
2659
2660 return 0;
2661 }
2662 else
2663 {
2664 int i;
2665 /* if we were woken up but can't down, we look through the whole */
2666 /* waiters list and only add us if we aren't in there already */
2667 /* this avoids some degenerate memory usage cases */
2668
2669 for (i = 1; i <= AvFILLp (av); ++i)
2670 if (AvARRAY (av)[i] == SvRV (coro_current))
2671 return 1;
2672
2673 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2674 return 1;
2675 }
2676}
2677
2678static int
2679slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2680{
2681 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2682}
2683
2684static int
2685slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2686{
2687 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2688}
2689
2690static void
2691slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2692{
2693 AV *av = (AV *)SvRV (arg [0]);
2694
2695 if (SvIVX (AvARRAY (av)[0]) > 0)
2696 {
2697 frame->data = (void *)av;
2698 frame->prepare = prepare_nop;
2699 }
2700 else
2701 {
2702 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2703
2704 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2705 frame->prepare = prepare_schedule;
2706
2707 /* to avoid race conditions when a woken-up coro gets terminated */
2708 /* we arrange for a temporary on_destroy that calls adjust (0) */
2709 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2710 }
2711}
2712
2713static void
2714slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2715{
2716 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2717 frame->check = slf_check_semaphore_down;
2718}
2719
2720static void
2721slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2722{
2723 if (items >= 2)
2724 {
2725 /* callback form */
2726 AV *av = (AV *)SvRV (arg [0]);
2727 SV *cb_cv = s_get_cv_croak (arg [1]);
2728
2729 av_push (av, SvREFCNT_inc_NN (cb_cv));
2730
2731 if (SvIVX (AvARRAY (av)[0]) > 0)
2732 coro_semaphore_adjust (aTHX_ av, 0);
2733
2734 frame->prepare = prepare_nop;
2735 frame->check = slf_check_nop;
2736 }
2737 else
2738 {
2739 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2740 frame->check = slf_check_semaphore_wait;
2741 }
2742}
2743
2744/* signal */
2745
2746static void
2747coro_signal_wake (pTHX_ AV *av, int count)
2748{
2749 SvIVX (AvARRAY (av)[0]) = 0;
2750
2751 /* now signal count waiters */
2752 while (count > 0 && AvFILLp (av) > 0)
2753 {
2754 SV *cb;
2755
2756 /* swap first two elements so we can shift a waiter */
2757 cb = AvARRAY (av)[0];
2758 AvARRAY (av)[0] = AvARRAY (av)[1];
2759 AvARRAY (av)[1] = cb;
2760
2761 cb = av_shift (av);
2762
2763 if (SvTYPE (cb) == SVt_PVCV)
2764 {
2765 dSP;
2766 PUSHMARK (SP);
2767 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2768 PUTBACK;
2769 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2770 }
2771 else
2772 {
2773 api_ready (aTHX_ cb);
2774 sv_setiv (cb, 0); /* signal waiter */
2775 }
2776
2777 SvREFCNT_dec (cb);
2778
2779 --count;
2780 }
2781}
2782
2783static int
2784slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2785{
2786 /* if we are about to throw, also stop waiting */
2787 return SvROK ((SV *)frame->data) && !CORO_THROW;
2788}
2789
2790static void
2791slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2792{
2793 AV *av = (AV *)SvRV (arg [0]);
2794
2795 if (items >= 2)
2796 {
2797 SV *cb_cv = s_get_cv_croak (arg [1]);
2798 av_push (av, SvREFCNT_inc_NN (cb_cv));
2799
2800 if (SvIVX (AvARRAY (av)[0]))
2801 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2802
2803 frame->prepare = prepare_nop;
2804 frame->check = slf_check_nop;
2805 }
2806 else if (SvIVX (AvARRAY (av)[0]))
2807 {
2808 SvIVX (AvARRAY (av)[0]) = 0;
2809 frame->prepare = prepare_nop;
2810 frame->check = slf_check_nop;
2811 }
2812 else
2813 {
2814 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2815
2816 av_push (av, waiter);
2817
2818 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2819 frame->prepare = prepare_schedule;
2820 frame->check = slf_check_signal_wait;
2821 }
2822}
2823
2824/*****************************************************************************/
2825/* Coro::AIO */
2826
2827#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2828
2829/* helper storage struct */
2830struct io_state
2831{
2832 int errorno;
2833 I32 laststype; /* U16 in 5.10.0 */
2834 int laststatval;
2835 Stat_t statcache;
2836};
2837
2838static void
2839coro_aio_callback (pTHX_ CV *cv)
2840{
2841 dXSARGS;
2842 AV *state = (AV *)S_GENSUB_ARG;
2843 SV *coro = av_pop (state);
2844 SV *data_sv = newSV (sizeof (struct io_state));
2845
2846 av_extend (state, items - 1);
2847
2848 sv_upgrade (data_sv, SVt_PV);
2849 SvCUR_set (data_sv, sizeof (struct io_state));
2850 SvPOK_only (data_sv);
2851
2852 {
2853 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2854
2855 data->errorno = errno;
2856 data->laststype = PL_laststype;
2857 data->laststatval = PL_laststatval;
2858 data->statcache = PL_statcache;
2859 }
2860
2861 /* now build the result vector out of all the parameters and the data_sv */
2862 {
2863 int i;
2864
2865 for (i = 0; i < items; ++i)
2866 av_push (state, SvREFCNT_inc_NN (ST (i)));
2867 }
2868
2869 av_push (state, data_sv);
2870
2871 api_ready (aTHX_ coro);
2872 SvREFCNT_dec (coro);
2873 SvREFCNT_dec ((AV *)state);
2874}
2875
2876static int
2877slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2878{
2879 AV *state = (AV *)frame->data;
2880
2881 /* if we are about to throw, return early */
2882 /* this does not cancel the aio request, but at least */
2883 /* it quickly returns */
2884 if (CORO_THROW)
2885 return 0;
2886
2887 /* one element that is an RV? repeat! */
2888 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2889 return 1;
2890
2891 /* restore status */
2892 {
2893 SV *data_sv = av_pop (state);
2894 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2895
2896 errno = data->errorno;
2897 PL_laststype = data->laststype;
2898 PL_laststatval = data->laststatval;
2899 PL_statcache = data->statcache;
2900
2901 SvREFCNT_dec (data_sv);
2902 }
2903
2904 /* push result values */
2905 {
2906 dSP;
2907 int i;
2908
2909 EXTEND (SP, AvFILLp (state) + 1);
2910 for (i = 0; i <= AvFILLp (state); ++i)
2911 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2912
2913 PUTBACK;
2914 }
888 2915
889 return 0; 2916 return 0;
890} 2917}
891 2918
892static void 2919static void
893api_ready (SV *coro) 2920slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
894{ 2921{
895 dTHX; 2922 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
896
897 if (SvROK (coro))
898 coro = SvRV (coro);
899
900 LOCK;
901 coro_enq (aTHX_ SvREFCNT_inc (coro));
902 UNLOCK;
903}
904
905static void
906api_schedule (void)
907{
908 dTHX;
909
910 SV *prev, *next;
911
912 LOCK;
913
914 prev = SvRV (GvSV (coro_current)); 2923 SV *coro_hv = SvRV (coro_current);
915 next = coro_deq (aTHX_ PRIO_MIN); 2924 struct coro *coro = SvSTATE_hv (coro_hv);
916 2925
917 if (!next) 2926 /* put our coroutine id on the state arg */
918 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 2927 av_push (state, SvREFCNT_inc_NN (coro_hv));
919 2928
920 /* free this only after the transfer */ 2929 /* first see whether we have a non-zero priority and set it as AIO prio */
921 coro_mortal = prev; 2930 if (coro->prio)
922 SV_CORO (prev, "Coro::schedule"); 2931 {
2932 dSP;
923 2933
924 SvRV (GvSV (coro_current)) = next; 2934 static SV *prio_cv;
2935 static SV *prio_sv;
925 2936
926 SV_CORO (next, "Coro::schedule"); 2937 if (expect_false (!prio_cv))
2938 {
2939 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2940 prio_sv = newSViv (0);
2941 }
927 2942
928 UNLOCK; 2943 PUSHMARK (SP);
2944 sv_setiv (prio_sv, coro->prio);
2945 XPUSHs (prio_sv);
929 2946
930 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 2947 PUTBACK;
931 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2948 call_sv (prio_cv, G_VOID | G_DISCARD);
932} 2949 }
933 2950
934static void 2951 /* now call the original request */
935api_cede (void) 2952 {
936{ 2953 dSP;
937 dTHX; 2954 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2955 int i;
938 2956
939 LOCK; 2957 PUSHMARK (SP);
940 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
941 UNLOCK;
942 2958
943 api_schedule (); 2959 /* first push all args to the stack */
944} 2960 EXTEND (SP, items + 1);
945 2961
2962 for (i = 0; i < items; ++i)
2963 PUSHs (arg [i]);
2964
2965 /* now push the callback closure */
2966 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2967
2968 /* now call the AIO function - we assume our request is uncancelable */
2969 PUTBACK;
2970 call_sv ((SV *)req, G_VOID | G_DISCARD);
2971 }
2972
2973 /* now that the request is going, we loop till we have a result */
2974 frame->data = (void *)state;
2975 frame->prepare = prepare_schedule;
2976 frame->check = slf_check_aio_req;
2977}
2978
2979static void
2980coro_aio_req_xs (pTHX_ CV *cv)
2981{
2982 dXSARGS;
2983
2984 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2985
2986 XSRETURN_EMPTY;
2987}
2988
2989/*****************************************************************************/
2990
2991#if CORO_CLONE
2992# include "clone.c"
2993#endif
2994
2995/*****************************************************************************/
2996
2997static SV *
2998coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2999{
3000 SV *coro_sv;
3001 struct coro *coro;
3002 MAGIC *mg;
3003 HV *hv;
3004 SV *cb;
3005 int i;
3006
3007 if (argc > 0)
3008 {
3009 cb = s_get_cv_croak (argv [0]);
3010
3011 if (!is_coro)
3012 {
3013 if (CvISXSUB (cb))
3014 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3015
3016 if (!CvROOT (cb))
3017 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3018 }
3019 }
3020
3021 Newz (0, coro, 1, struct coro);
3022 coro->args = newAV ();
3023 coro->flags = CF_NEW;
3024
3025 if (coro_first) coro_first->prev = coro;
3026 coro->next = coro_first;
3027 coro_first = coro;
3028
3029 coro->hv = hv = newHV ();
3030 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3031 mg->mg_flags |= MGf_DUP;
3032 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3033
3034 if (argc > 0)
3035 {
3036 av_extend (coro->args, argc + is_coro - 1);
3037
3038 if (is_coro)
3039 {
3040 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3041 cb = (SV *)cv_coro_run;
3042 }
3043
3044 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3045
3046 for (i = 1; i < argc; i++)
3047 av_push (coro->args, newSVsv (argv [i]));
3048 }
3049
3050 return coro_sv;
3051}
3052
946MODULE = Coro::State PACKAGE = Coro::State 3053MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
947 3054
948PROTOTYPES: ENABLE 3055PROTOTYPES: DISABLE
949 3056
950BOOT: 3057BOOT:
951{ /* {} necessary for stoopid perl-5.6.x */ 3058{
952#ifdef USE_ITHREADS 3059#ifdef USE_ITHREADS
953 MUTEX_INIT (&coro_mutex); 3060# if CORO_PTHREAD
3061 coro_thx = PERL_GET_CONTEXT;
3062# endif
954#endif 3063#endif
3064 BOOT_PAGESIZE;
955 3065
956 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3066 cctx_current = cctx_new_empty ();
957 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3067
3068 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3069 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3070
3071 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3072 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3073 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3074
3075 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3076 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3077 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3078
958 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3079 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
959 3080
960 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3081 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
961 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3082 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
962 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3083 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
963 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3084 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
964 3085
965 main_mainstack = PL_mainstack; 3086 main_mainstack = PL_mainstack;
3087 main_top_env = PL_top_env;
966 3088
3089 while (main_top_env->je_prev)
3090 main_top_env = main_top_env->je_prev;
3091
3092 {
3093 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3094
3095 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3096 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3097
3098 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3099 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3100 }
3101
967 coroapi.ver = CORO_API_VERSION; 3102 coroapi.ver = CORO_API_VERSION;
3103 coroapi.rev = CORO_API_REVISION;
3104
968 coroapi.transfer = api_transfer; 3105 coroapi.transfer = api_transfer;
969}
970 3106
971Coro::State 3107 coroapi.sv_state = SvSTATE_;
972_newprocess(args) 3108 coroapi.execute_slf = api_execute_slf;
973 SV * args 3109 coroapi.prepare_nop = prepare_nop;
974 PROTOTYPE: $ 3110 coroapi.prepare_schedule = prepare_schedule;
3111 coroapi.prepare_cede = prepare_cede;
3112 coroapi.prepare_cede_notself = prepare_cede_notself;
3113
3114 {
3115 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3116
3117 if (!svp) croak ("Time::HiRes is required");
3118 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3119
3120 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3121
3122 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3123 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3124 }
3125
3126 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3127}
3128
3129SV *
3130new (SV *klass, ...)
3131 ALIAS:
3132 Coro::new = 1
975 CODE: 3133 CODE:
976 Coro__State coro; 3134 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
977 3135 OUTPUT:
978 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
979 croak ("Coro::State::_newprocess expects an arrayref");
980
981 Newz (0, coro, 1, struct coro);
982
983 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
984 /*coro->mainstack = 0; *//*actual work is done inside transfer */
985 /*coro->stack = 0;*/
986
987 /* same as JMPENV_BOOTSTRAP */
988 /* we might be able to recycle start_env, but safe is safe */
989 /*Zero(&coro->start_env, 1, JMPENV);*/
990 coro->start_env.je_ret = -1;
991 coro->start_env.je_mustcatch = TRUE;
992
993 RETVAL = coro;
994 OUTPUT:
995 RETVAL 3136 RETVAL
996 3137
997void 3138void
998transfer(prev, next, flags) 3139transfer (...)
999 SV *prev
1000 SV *next
1001 int flags
1002 PROTOTYPE: @ 3140 PROTOTYPE: $$
1003 CODE: 3141 CODE:
1004 PUTBACK; 3142 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1005 SV_CORO (next, "Coro::transfer"); 3143
1006 SV_CORO (prev, "Coro::transfer"); 3144bool
1007 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3145_destroy (SV *coro_sv)
1008 SPAGAIN; 3146 CODE:
3147 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3148 OUTPUT:
3149 RETVAL
1009 3150
1010void 3151void
1011DESTROY(coro)
1012 Coro::State coro
1013 CODE:
1014
1015 if (coro->mainstack && coro->mainstack != main_mainstack)
1016 {
1017 struct coro temp;
1018
1019 PUTBACK;
1020 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
1021 LOAD(aTHX_ coro);
1022 SPAGAIN;
1023
1024 destroy_stacks (aTHX);
1025
1026 LOAD((&temp)); /* this will get rid of defsv etc.. */
1027 SPAGAIN;
1028
1029 coro->mainstack = 0;
1030 }
1031
1032 deallocate_stack (coro);
1033 SvREFCNT_dec (coro->args);
1034 Safefree (coro);
1035
1036void
1037_exit(code) 3152_exit (int code)
1038 int code
1039 PROTOTYPE: $ 3153 PROTOTYPE: $
1040 CODE: 3154 CODE:
1041 _exit (code); 3155 _exit (code);
1042 3156
1043MODULE = Coro::State PACKAGE = Coro::Cont 3157SV *
3158clone (Coro::State coro)
3159 CODE:
3160{
3161#if CORO_CLONE
3162 struct coro *ncoro = coro_clone (aTHX_ coro);
3163 MAGIC *mg;
3164 /* TODO: too much duplication */
3165 ncoro->hv = newHV ();
3166 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3167 mg->mg_flags |= MGf_DUP;
3168 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3169#else
3170 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3171#endif
3172}
3173 OUTPUT:
3174 RETVAL
1044 3175
1045# this is slightly dirty (should expose a c-level api) 3176int
3177cctx_stacksize (int new_stacksize = 0)
3178 PROTOTYPE: ;$
3179 CODE:
3180 RETVAL = cctx_stacksize;
3181 if (new_stacksize)
3182 {
3183 cctx_stacksize = new_stacksize;
3184 ++cctx_gen;
3185 }
3186 OUTPUT:
3187 RETVAL
3188
3189int
3190cctx_max_idle (int max_idle = 0)
3191 PROTOTYPE: ;$
3192 CODE:
3193 RETVAL = cctx_max_idle;
3194 if (max_idle > 1)
3195 cctx_max_idle = max_idle;
3196 OUTPUT:
3197 RETVAL
3198
3199int
3200cctx_count ()
3201 PROTOTYPE:
3202 CODE:
3203 RETVAL = cctx_count;
3204 OUTPUT:
3205 RETVAL
3206
3207int
3208cctx_idle ()
3209 PROTOTYPE:
3210 CODE:
3211 RETVAL = cctx_idle;
3212 OUTPUT:
3213 RETVAL
1046 3214
1047void 3215void
1048yield(...) 3216list ()
1049 PROTOTYPE: @ 3217 PROTOTYPE:
3218 PPCODE:
3219{
3220 struct coro *coro;
3221 for (coro = coro_first; coro; coro = coro->next)
3222 if (coro->hv)
3223 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3224}
3225
3226void
3227call (Coro::State coro, SV *coderef)
3228 ALIAS:
3229 eval = 1
3230 CODE:
3231{
3232 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3233 {
3234 struct coro *current = SvSTATE_current;
3235
3236 if (current != coro)
3237 {
3238 PUTBACK;
3239 save_perl (aTHX_ current);
3240 load_perl (aTHX_ coro);
3241 SPAGAIN;
3242 }
3243
3244 PUSHSTACK;
3245
3246 PUSHMARK (SP);
3247 PUTBACK;
3248
3249 if (ix)
3250 eval_sv (coderef, 0);
3251 else
3252 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3253
3254 POPSTACK;
3255 SPAGAIN;
3256
3257 if (current != coro)
3258 {
3259 PUTBACK;
3260 save_perl (aTHX_ coro);
3261 load_perl (aTHX_ current);
3262 SPAGAIN;
3263 }
3264 }
3265}
3266
3267SV *
3268is_ready (Coro::State coro)
3269 PROTOTYPE: $
3270 ALIAS:
3271 is_ready = CF_READY
3272 is_running = CF_RUNNING
3273 is_new = CF_NEW
3274 is_destroyed = CF_DESTROYED
3275 is_suspended = CF_SUSPENDED
3276 CODE:
3277 RETVAL = boolSV (coro->flags & ix);
3278 OUTPUT:
3279 RETVAL
3280
3281void
3282throw (Coro::State self, SV *exception = &PL_sv_undef)
3283 PROTOTYPE: $;$
1050 CODE: 3284 CODE:
1051 static SV *returnstk; 3285{
1052 SV *sv; 3286 struct coro *current = SvSTATE_current;
1053 AV *defav = GvAV (PL_defgv); 3287 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
1054 struct coro *prev, *next;
1055
1056 if (!returnstk)
1057 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1058
1059 /* set up @_ -- ugly */
1060 av_clear (defav);
1061 av_fill (defav, items - 1);
1062 while (items--)
1063 av_store (defav, items, SvREFCNT_inc (ST(items)));
1064
1065 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1066 sv = av_pop ((AV *)SvRV (returnstk));
1067 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1068 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1069 SvREFCNT_dec (sv); 3288 SvREFCNT_dec (*exceptionp);
1070 3289 SvGETMAGIC (exception);
1071 transfer(aTHX_ prev, next, 0); 3290 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
1072
1073MODULE = Coro::State PACKAGE = Coro
1074
1075# this is slightly dirty (should expose a c-level api)
1076
1077BOOT:
1078{
1079 int i;
1080 HV *stash = gv_stashpv ("Coro", TRUE);
1081
1082 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1083 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1084 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1085 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1086 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1087 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1088
1089 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1090 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1091
1092 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1093 coro_ready[i] = newAV ();
1094
1095 {
1096 SV *sv = perl_get_sv("Coro::API", 1);
1097
1098 coroapi.schedule = api_schedule;
1099 coroapi.cede = api_cede;
1100 coroapi.ready = api_ready;
1101 coroapi.nready = &coro_nready;
1102 coroapi.current = coro_current;
1103
1104 GCoroAPI = &coroapi;
1105 sv_setiv(sv, (IV)&coroapi);
1106 SvREADONLY_on(sv);
1107 }
1108} 3291}
1109
1110#if !PERL_MICRO
1111 3292
1112void 3293void
1113ready(self) 3294api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1114 SV * self 3295 PROTOTYPE: $;$
3296 C_ARGS: aTHX_ coro, flags
3297
3298SV *
3299has_cctx (Coro::State coro)
1115 PROTOTYPE: $ 3300 PROTOTYPE: $
1116 CODE: 3301 CODE:
1117 api_ready (self); 3302 /* maybe manage the running flag differently */
1118 3303 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1119#endif 3304 OUTPUT:
3305 RETVAL
1120 3306
1121int 3307int
3308is_traced (Coro::State coro)
3309 PROTOTYPE: $
3310 CODE:
3311 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3312 OUTPUT:
3313 RETVAL
3314
3315UV
3316rss (Coro::State coro)
3317 PROTOTYPE: $
3318 ALIAS:
3319 usecount = 1
3320 CODE:
3321 switch (ix)
3322 {
3323 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3324 case 1: RETVAL = coro->usecount; break;
3325 }
3326 OUTPUT:
3327 RETVAL
3328
3329void
3330force_cctx ()
3331 PROTOTYPE:
3332 CODE:
3333 cctx_current->idle_sp = 0;
3334
3335void
3336swap_defsv (Coro::State self)
3337 PROTOTYPE: $
3338 ALIAS:
3339 swap_defav = 1
3340 CODE:
3341 if (!self->slot)
3342 croak ("cannot swap state with coroutine that has no saved state,");
3343 else
3344 {
3345 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3346 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3347
3348 SV *tmp = *src; *src = *dst; *dst = tmp;
3349 }
3350
3351void
3352cancel (Coro::State self)
3353 CODE:
3354 coro_state_destroy (aTHX_ self);
3355 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3356
3357
3358SV *
3359enable_times (int enabled = enable_times)
3360 CODE:
3361{
3362 RETVAL = boolSV (enable_times);
3363
3364 if (enabled != enable_times)
3365 {
3366 enable_times = enabled;
3367
3368 coro_times_update ();
3369 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3370 }
3371}
3372 OUTPUT:
3373 RETVAL
3374
3375void
3376times (Coro::State self)
3377 PPCODE:
3378{
3379 struct coro *current = SvSTATE (coro_current);
3380
3381 if (expect_false (current == self))
3382 {
3383 coro_times_update ();
3384 coro_times_add (SvSTATE (coro_current));
3385 }
3386
3387 EXTEND (SP, 2);
3388 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3389 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3390
3391 if (expect_false (current == self))
3392 coro_times_sub (SvSTATE (coro_current));
3393}
3394
3395void
3396swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3397 CODE:
3398{
3399 struct coro *current = SvSTATE_current;
3400
3401 if (current == coro)
3402 SWAP_SVS (current);
3403
3404 if (!coro->swap_sv)
3405 coro->swap_sv = newAV ();
3406
3407 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3408 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3409
3410 if (current == coro)
3411 SWAP_SVS (current);
3412}
3413
3414
3415MODULE = Coro::State PACKAGE = Coro
3416
3417BOOT:
3418{
3419 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3420 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3421 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3422 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3423 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3424 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3425 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3426 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3427 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3428
3429 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3430 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3431 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3432 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3433
3434 coro_stash = gv_stashpv ("Coro", TRUE);
3435
3436 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3437 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3438 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3439 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3440 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3441 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3442
3443 {
3444 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3445
3446 coroapi.schedule = api_schedule;
3447 coroapi.schedule_to = api_schedule_to;
3448 coroapi.cede = api_cede;
3449 coroapi.cede_notself = api_cede_notself;
3450 coroapi.ready = api_ready;
3451 coroapi.is_ready = api_is_ready;
3452 coroapi.nready = coro_nready;
3453 coroapi.current = coro_current;
3454
3455 /*GCoroAPI = &coroapi;*/
3456 sv_setiv (sv, (IV)&coroapi);
3457 SvREADONLY_on (sv);
3458 }
3459}
3460
3461SV *
3462async (...)
3463 PROTOTYPE: &@
3464 CODE:
3465 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3466 api_ready (aTHX_ RETVAL);
3467 OUTPUT:
3468 RETVAL
3469
3470void
3471terminate (...)
3472 CODE:
3473 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3474
3475void
3476schedule (...)
3477 CODE:
3478 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3479
3480void
3481schedule_to (...)
3482 CODE:
3483 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3484
3485void
3486cede_to (...)
3487 CODE:
3488 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3489
3490void
3491cede (...)
3492 CODE:
3493 CORO_EXECUTE_SLF_XS (slf_init_cede);
3494
3495void
3496cede_notself (...)
3497 CODE:
3498 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3499
3500void
3501_set_current (SV *current)
3502 PROTOTYPE: $
3503 CODE:
3504 SvREFCNT_dec (SvRV (coro_current));
3505 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3506
3507void
3508_set_readyhook (SV *hook)
3509 PROTOTYPE: $
3510 CODE:
3511 SvREFCNT_dec (coro_readyhook);
3512 SvGETMAGIC (hook);
3513 if (SvOK (hook))
3514 {
3515 coro_readyhook = newSVsv (hook);
3516 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3517 }
3518 else
3519 {
3520 coro_readyhook = 0;
3521 CORO_READYHOOK = 0;
3522 }
3523
3524int
3525prio (Coro::State coro, int newprio = 0)
3526 PROTOTYPE: $;$
3527 ALIAS:
3528 nice = 1
3529 CODE:
3530{
3531 RETVAL = coro->prio;
3532
3533 if (items > 1)
3534 {
3535 if (ix)
3536 newprio = coro->prio - newprio;
3537
3538 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3539 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3540
3541 coro->prio = newprio;
3542 }
3543}
3544 OUTPUT:
3545 RETVAL
3546
3547SV *
3548ready (SV *self)
3549 PROTOTYPE: $
3550 CODE:
3551 RETVAL = boolSV (api_ready (aTHX_ self));
3552 OUTPUT:
3553 RETVAL
3554
3555int
1122nready(...) 3556nready (...)
1123 PROTOTYPE: 3557 PROTOTYPE:
1124 CODE: 3558 CODE:
1125 RETVAL = coro_nready; 3559 RETVAL = coro_nready;
1126 OUTPUT: 3560 OUTPUT:
1127 RETVAL 3561 RETVAL
1128 3562
1129void 3563void
1130schedule(...) 3564suspend (Coro::State self)
1131 PROTOTYPE: 3565 PROTOTYPE: $
1132 CODE: 3566 CODE:
1133 api_schedule (); 3567 self->flags |= CF_SUSPENDED;
1134 3568
1135void 3569void
1136cede(...) 3570resume (Coro::State self)
1137 PROTOTYPE: 3571 PROTOTYPE: $
1138 CODE: 3572 CODE:
3573 self->flags &= ~CF_SUSPENDED;
3574
3575void
3576_pool_handler (...)
3577 CODE:
3578 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3579
3580void
3581async_pool (SV *cv, ...)
3582 PROTOTYPE: &@
3583 PPCODE:
3584{
3585 HV *hv = (HV *)av_pop (av_async_pool);
3586 AV *av = newAV ();
3587 SV *cb = ST (0);
3588 int i;
3589
3590 av_extend (av, items - 2);
3591 for (i = 1; i < items; ++i)
3592 av_push (av, SvREFCNT_inc_NN (ST (i)));
3593
3594 if ((SV *)hv == &PL_sv_undef)
3595 {
3596 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3597 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3598 SvREFCNT_dec (sv);
3599 }
3600
3601 {
3602 struct coro *coro = SvSTATE_hv (hv);
3603
3604 assert (!coro->invoke_cb);
3605 assert (!coro->invoke_av);
3606 coro->invoke_cb = SvREFCNT_inc (cb);
3607 coro->invoke_av = av;
3608 }
3609
3610 api_ready (aTHX_ (SV *)hv);
3611
3612 if (GIMME_V != G_VOID)
3613 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3614 else
3615 SvREFCNT_dec (hv);
3616}
3617
3618SV *
3619rouse_cb ()
3620 PROTOTYPE:
3621 CODE:
3622 RETVAL = coro_new_rouse_cb (aTHX);
3623 OUTPUT:
3624 RETVAL
3625
3626void
3627rouse_wait (...)
3628 PROTOTYPE: ;$
3629 PPCODE:
3630 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3631
3632void
3633on_enter (SV *block)
3634 ALIAS:
3635 on_leave = 1
3636 PROTOTYPE: &
3637 CODE:
3638{
3639 struct coro *coro = SvSTATE_current;
3640 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3641
3642 block = s_get_cv_croak (block);
3643
3644 if (!*avp)
3645 *avp = newAV ();
3646
3647 av_push (*avp, SvREFCNT_inc (block));
3648
3649 if (!ix)
3650 on_enterleave_call (aTHX_ block);
3651
3652 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3653 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3654 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3655}
3656
3657
3658MODULE = Coro::State PACKAGE = PerlIO::cede
3659
3660BOOT:
3661 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3662
3663
3664MODULE = Coro::State PACKAGE = Coro::Semaphore
3665
3666SV *
3667new (SV *klass, SV *count = 0)
3668 CODE:
3669{
3670 int semcnt = 1;
3671
3672 if (count)
3673 {
3674 SvGETMAGIC (count);
3675
3676 if (SvOK (count))
3677 semcnt = SvIV (count);
3678 }
3679
3680 RETVAL = sv_bless (
3681 coro_waitarray_new (aTHX_ semcnt),
3682 GvSTASH (CvGV (cv))
3683 );
3684}
3685 OUTPUT:
3686 RETVAL
3687
3688# helper for Coro::Channel and others
3689SV *
3690_alloc (int count)
3691 CODE:
3692 RETVAL = coro_waitarray_new (aTHX_ count);
3693 OUTPUT:
3694 RETVAL
3695
3696SV *
3697count (SV *self)
3698 CODE:
3699 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3700 OUTPUT:
3701 RETVAL
3702
3703void
3704up (SV *self, int adjust = 1)
3705 ALIAS:
3706 adjust = 1
3707 CODE:
3708 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3709
3710void
3711down (...)
3712 CODE:
3713 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3714
3715void
3716wait (...)
3717 CODE:
3718 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3719
3720void
3721try (SV *self)
3722 PPCODE:
3723{
3724 AV *av = (AV *)SvRV (self);
3725 SV *count_sv = AvARRAY (av)[0];
3726 IV count = SvIVX (count_sv);
3727
3728 if (count > 0)
3729 {
3730 --count;
3731 SvIVX (count_sv) = count;
3732 XSRETURN_YES;
3733 }
3734 else
3735 XSRETURN_NO;
3736}
3737
3738void
3739waiters (SV *self)
3740 PPCODE:
3741{
3742 AV *av = (AV *)SvRV (self);
3743 int wcount = AvFILLp (av) + 1 - 1;
3744
3745 if (GIMME_V == G_SCALAR)
3746 XPUSHs (sv_2mortal (newSViv (wcount)));
3747 else
3748 {
3749 int i;
3750 EXTEND (SP, wcount);
3751 for (i = 1; i <= wcount; ++i)
3752 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3753 }
3754}
3755
3756MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3757
3758void
3759_may_delete (SV *sem, int count, int extra_refs)
3760 PPCODE:
3761{
3762 AV *av = (AV *)SvRV (sem);
3763
3764 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3765 && AvFILLp (av) == 0 /* no waiters, just count */
3766 && SvIV (AvARRAY (av)[0]) == count)
3767 XSRETURN_YES;
3768
3769 XSRETURN_NO;
3770}
3771
3772MODULE = Coro::State PACKAGE = Coro::Signal
3773
3774SV *
3775new (SV *klass)
3776 CODE:
3777 RETVAL = sv_bless (
3778 coro_waitarray_new (aTHX_ 0),
3779 GvSTASH (CvGV (cv))
3780 );
3781 OUTPUT:
3782 RETVAL
3783
3784void
3785wait (...)
3786 CODE:
3787 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3788
3789void
3790broadcast (SV *self)
3791 CODE:
3792{
3793 AV *av = (AV *)SvRV (self);
3794 coro_signal_wake (aTHX_ av, AvFILLp (av));
3795}
3796
3797void
3798send (SV *self)
3799 CODE:
3800{
3801 AV *av = (AV *)SvRV (self);
3802
3803 if (AvFILLp (av))
3804 coro_signal_wake (aTHX_ av, 1);
3805 else
3806 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3807}
3808
3809IV
3810awaited (SV *self)
3811 CODE:
3812 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3813 OUTPUT:
3814 RETVAL
3815
3816
3817MODULE = Coro::State PACKAGE = Coro::AnyEvent
3818
3819BOOT:
3820 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3821
3822void
3823_schedule (...)
3824 CODE:
3825{
3826 static int incede;
3827
1139 api_cede (); 3828 api_cede_notself (aTHX);
1140 3829
3830 ++incede;
3831 while (coro_nready >= incede && api_cede (aTHX))
3832 ;
3833
3834 sv_setsv (sv_activity, &PL_sv_undef);
3835 if (coro_nready >= incede)
3836 {
3837 PUSHMARK (SP);
3838 PUTBACK;
3839 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3840 }
3841
3842 --incede;
3843}
3844
3845
3846MODULE = Coro::State PACKAGE = Coro::AIO
3847
3848void
3849_register (char *target, char *proto, SV *req)
3850 CODE:
3851{
3852 SV *req_cv = s_get_cv_croak (req);
3853 /* newXSproto doesn't return the CV on 5.8 */
3854 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3855 sv_setpv ((SV *)slf_cv, proto);
3856 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3857}
3858
3859MODULE = Coro::State PACKAGE = Coro::Select
3860
3861void
3862patch_pp_sselect ()
3863 CODE:
3864 if (!coro_old_pp_sselect)
3865 {
3866 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3867 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3868 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3869 }
3870
3871void
3872unpatch_pp_sselect ()
3873 CODE:
3874 if (coro_old_pp_sselect)
3875 {
3876 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3877 coro_old_pp_sselect = 0;
3878 }
3879

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