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Comparing Coro/Coro/State.xs (file contents):
Revision 1.67 by root, Mon Dec 12 20:07:44 2005 UTC vs.
Revision 1.379 by root, Tue Jul 27 14:50:17 2010 UTC

1#define NDEBUG 1
2
3#include "libcoro/coro.c"
4
1#define PERL_NO_GET_CONTEXT 5#define PERL_NO_GET_CONTEXT
2 6#define PERL_EXT
3#include "libcoro/coro.c"
4 7
5#include "EXTERN.h" 8#include "EXTERN.h"
6#include "perl.h" 9#include "perl.h"
7#include "XSUB.h" 10#include "XSUB.h"
11#include "perliol.h"
8 12
9#include "patchlevel.h" 13#include "schmorp.h"
10 14
11// threaded perls might need much more, 65536 or more, 15#include <stdio.h>
12// which is 0.5 to 1MB 16#include <errno.h>
13#define STACKSIZE 16384 17#include <assert.h>
14 18
15#if PERL_VERSION < 6
16# ifndef PL_ppaddr
17# define PL_ppaddr ppaddr
18# endif
19# ifndef call_sv
20# define call_sv perl_call_sv
21# endif
22# ifndef get_sv
23# define get_sv perl_get_sv
24# endif
25# ifndef get_cv
26# define get_cv perl_get_cv
27# endif
28# ifndef IS_PADGV
29# define IS_PADGV(v) 0
30# endif
31# ifndef IS_PADCONST 19#ifndef SVs_PADSTALE
32# define IS_PADCONST(v) 0 20# define SVs_PADSTALE 0
33# endif
34#endif 21#endif
35 22
36#include <signal.h> 23#ifdef WIN32
24# undef setjmp
25# undef longjmp
26# undef _exit
27# define setjmp _setjmp /* deep magic */
28#else
29# include <inttypes.h> /* most portable stdint.h */
30#endif
37 31
38#ifdef HAVE_MMAP 32#ifdef HAVE_MMAP
39# include <unistd.h> 33# include <unistd.h>
40# include <sys/mman.h> 34# include <sys/mman.h>
41# ifndef MAP_ANONYMOUS 35# ifndef MAP_ANONYMOUS
… …
43# define MAP_ANONYMOUS MAP_ANON 37# define MAP_ANONYMOUS MAP_ANON
44# else 38# else
45# undef HAVE_MMAP 39# undef HAVE_MMAP
46# endif 40# endif
47# endif 41# endif
42# include <limits.h>
43# ifndef PAGESIZE
44# define PAGESIZE pagesize
45# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
46static long pagesize;
47# else
48# define BOOT_PAGESIZE (void)0
49# endif
50#else
51# define PAGESIZE 0
52# define BOOT_PAGESIZE (void)0
48#endif 53#endif
49 54
50#define SUB_INIT "Coro::State::initialize" 55#if CORO_USE_VALGRIND
51#define UCORO_STATE "_coro_state" 56# include <valgrind/valgrind.h>
57#endif
52 58
53/* The next macro should declare a variable stacklevel that contains and approximation 59/* the maximum number of idle cctx that will be pooled */
54 * to the current C stack pointer. Its property is that it changes with each call 60static int cctx_max_idle = 4;
55 * and should be unique. */ 61
62#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
63# undef CORO_STACKGUARD
64#endif
65
66#ifndef CORO_STACKGUARD
67# define CORO_STACKGUARD 0
68#endif
69
70/* prefer perl internal functions over our own? */
71#ifndef CORO_PREFER_PERL_FUNCTIONS
72# define CORO_PREFER_PERL_FUNCTIONS 0
73#endif
74
75/* The next macros try to return the current stack pointer, in an as
76 * portable way as possible. */
77#if __GNUC__ >= 4
78# define dSTACKLEVEL int stacklevel_dummy
79# define STACKLEVEL __builtin_frame_address (0)
80#else
81# define dSTACKLEVEL volatile void *stacklevel
56#define dSTACKLEVEL void *stacklevel = &stacklevel 82# define STACKLEVEL ((void *)&stacklevel)
83#endif
57 84
58#define IN_DESTRUCT (PL_main_cv == Nullcv) 85#define IN_DESTRUCT PL_dirty
59 86
60#define labs(l) ((l) >= 0 ? (l) : -(l)) 87#if __GNUC__ >= 3
88# define attribute(x) __attribute__(x)
89# define expect(expr,value) __builtin_expect ((expr), (value))
90# define INLINE static inline
91#else
92# define attribute(x)
93# define expect(expr,value) (expr)
94# define INLINE static
95#endif
96
97#define expect_false(expr) expect ((expr) != 0, 0)
98#define expect_true(expr) expect ((expr) != 0, 1)
99
100#define NOINLINE attribute ((noinline))
61 101
62#include "CoroAPI.h" 102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
63 104
64#ifdef USE_ITHREADS 105#ifdef USE_ITHREADS
65static perl_mutex coro_mutex; 106# if CORO_PTHREAD
66# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 107static void *coro_thx;
67# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 108# endif
68#else
69# define LOCK 0
70# define UNLOCK 0
71#endif 109#endif
72 110
111#ifdef __linux
112# include <time.h> /* for timespec */
113# include <syscall.h> /* for SYS_* */
114# ifdef SYS_clock_gettime
115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
116# define CORO_CLOCK_MONOTONIC 1
117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
118# endif
119#endif
120
121static double (*nvtime)(); /* so why doesn't it take void? */
122static void (*u2time)(pTHX_ UV ret[2]);
123
124/* we hijack an hopefully unused CV flag for our purposes */
125#define CVf_SLF 0x4000
126static OP *pp_slf (pTHX);
127
128static U32 cctx_gen;
129static size_t cctx_stacksize = CORO_STACKSIZE;
73static struct CoroAPI coroapi; 130static struct CoroAPI coroapi;
74static AV *main_mainstack; /* used to differentiate between $main and others */ 131static AV *main_mainstack; /* used to differentiate between $main and others */
132static JMPENV *main_top_env;
75static HV *coro_state_stash; 133static HV *coro_state_stash, *coro_stash;
76static SV *ucoro_state_sv;
77static U32 ucoro_state_hash;
78static SV *coro_mortal; /* will be freed after next transfer */ 134static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
79 135
80/* this is actually not only the c stack but also c registers etc... */ 136static AV *av_destroy; /* destruction queue */
137static SV *sv_manager; /* the manager coro */
138static SV *sv_idle; /* $Coro::idle */
139
140static GV *irsgv; /* $/ */
141static GV *stdoutgv; /* *STDOUT */
142static SV *rv_diehook;
143static SV *rv_warnhook;
144static HV *hv_sig; /* %SIG */
145
146/* async_pool helper stuff */
147static SV *sv_pool_rss;
148static SV *sv_pool_size;
149static SV *sv_async_pool_idle; /* description string */
150static AV *av_async_pool; /* idle pool */
151static SV *sv_Coro; /* class string */
152static CV *cv_pool_handler;
153
154/* Coro::AnyEvent */
155static SV *sv_activity;
156
157/* enable processtime/realtime profiling */
158static char enable_times;
159typedef U32 coro_ts[2];
160static coro_ts time_real, time_cpu;
161static char times_valid;
162
163static struct coro_cctx *cctx_first;
164static int cctx_count, cctx_idle;
165
166enum {
167 CC_MAPPED = 0x01,
168 CC_NOREUSE = 0x02, /* throw this away after tracing */
169 CC_TRACE = 0x04,
170 CC_TRACE_SUB = 0x08, /* trace sub calls */
171 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173};
174
175/* this is a structure representing a c-level coroutine */
81typedef struct { 176typedef struct coro_cctx
82 int refcnt; /* pointer reference counter */ 177{
83 int usecnt; /* shared by how many coroutines */ 178 struct coro_cctx *next;
84 int gencnt; /* generation counter */
85 179
180 /* the stack */
181 void *sptr;
182 size_t ssize;
183
184 /* cpu state */
185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
187 JMPENV *top_env;
86 coro_context cctx; 188 coro_context cctx;
87 189
88 void *sptr; 190 U32 gen;
89 long ssize; /* positive == mmap, otherwise malloc */ 191#if CORO_USE_VALGRIND
90} coro_stack; 192 int valgrind_id;
193#endif
194 unsigned char flags;
195} coro_cctx;
91 196
197coro_cctx *cctx_current; /* the currently running cctx */
198
199/*****************************************************************************/
200
201enum {
202 CF_RUNNING = 0x0001, /* coroutine is running */
203 CF_READY = 0x0002, /* coroutine is ready */
204 CF_NEW = 0x0004, /* has never been switched to */
205 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
206 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
207};
208
209/* the structure where most of the perl state is stored, overlaid on the cxstack */
210typedef struct
211{
212 SV *defsv;
213 AV *defav;
214 SV *errsv;
215 SV *irsgv;
216 HV *hinthv;
217#define VAR(name,type) type name;
218# include "state.h"
219#undef VAR
220} perl_slots;
221
222#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
223
224/* this is a structure representing a perl-level coroutine */
92struct coro { 225struct coro {
93 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 226 /* the C coroutine allocated to this perl coroutine, if any */
94 JMPENV start_env; 227 coro_cctx *cctx;
95 228
96 /* the optional C context */ 229 /* ready queue */
97 coro_stack *stack; 230 struct coro *next_ready;
98 void *cursp;
99 int gencnt;
100 231
101 /* optionally saved, might be zero */ 232 /* state data */
102 AV *defav; 233 struct CoroSLF slf_frame; /* saved slf frame */
103 SV *defsv;
104 SV *errsv;
105
106 /* saved global state not related to stacks */
107 U8 dowarn;
108 I32 in_eval;
109
110 /* the stacks and related info (callchain etc..) */
111 PERL_SI *curstackinfo;
112 AV *curstack;
113 AV *mainstack; 234 AV *mainstack;
114 SV **stack_sp; 235 perl_slots *slot; /* basically the saved sp */
115 OP *op;
116 SV **curpad;
117 AV *comppad;
118 CV *compcv;
119 SV **stack_base;
120 SV **stack_max;
121 SV **tmps_stack;
122 I32 tmps_floor;
123 I32 tmps_ix;
124 I32 tmps_max;
125 I32 *markstack;
126 I32 *markstack_ptr;
127 I32 *markstack_max;
128 I32 *scopestack;
129 I32 scopestack_ix;
130 I32 scopestack_max;
131 ANY *savestack;
132 I32 savestack_ix;
133 I32 savestack_max;
134 OP **retstack;
135 I32 retstack_ix;
136 I32 retstack_max;
137 PMOP *curpm;
138 COP *curcop;
139 JMPENV *top_env;
140 236
237 CV *startcv; /* the CV to execute */
141 /* data associated with this coroutine (initial args) */ 238 AV *args; /* data associated with this coroutine (initial args) */
142 AV *args; 239 int refcnt; /* coroutines are refcounted, yes */
240 int flags; /* CF_ flags */
241 HV *hv; /* the perl hash associated with this coro, if any */
242 void (*on_destroy)(pTHX_ struct coro *coro);
243
244 /* statistics */
245 int usecount; /* number of transfers to this coro */
246
247 /* coro process data */
248 int prio;
249 SV *except; /* exception to be thrown */
250 SV *rouse_cb;
251
252 /* async_pool */
253 SV *saved_deffh;
254 SV *invoke_cb;
255 AV *invoke_av;
256
257 /* on_enter/on_leave */
258 AV *on_enter;
259 AV *on_leave;
260
261 /* swap_sv */
262 AV *swap_sv;
263
264 /* times */
265 coro_ts t_cpu, t_real;
266
267 /* linked list */
268 struct coro *next, *prev;
143}; 269};
144 270
145typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
146typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
147 273
148/* mostly copied from op.c:cv_clone2 */ 274/* the following variables are effectively part of the perl context */
149STATIC AV * 275/* and get copied between struct coro and these variables */
150clone_padlist (pTHX_ AV *protopadlist) 276/* the mainr easonw e don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */
278
279/** Coro ********************************************************************/
280
281#define CORO_PRIO_MAX 3
282#define CORO_PRIO_HIGH 1
283#define CORO_PRIO_NORMAL 0
284#define CORO_PRIO_LOW -1
285#define CORO_PRIO_IDLE -3
286#define CORO_PRIO_MIN -4
287
288/* for Coro.pm */
289static SV *coro_current;
290static SV *coro_readyhook;
291static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
292static CV *cv_coro_run, *cv_coro_terminate;
293static struct coro *coro_first;
294#define coro_nready coroapi.nready
295
296/** Coro::Select ************************************************************/
297
298static OP *(*coro_old_pp_sselect) (pTHX);
299static SV *coro_select_select;
300
301/* horrible hack, but if it works... */
302static OP *
303coro_pp_sselect (pTHX)
151{ 304{
152 AV *av; 305 dSP;
153 I32 ix; 306 PUSHMARK (SP - 4); /* fake argument list */
154 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 307 XPUSHs (coro_select_select);
155 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 308 PUTBACK;
156 SV **pname = AvARRAY (protopad_name); 309
157 SV **ppad = AvARRAY (protopad); 310 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
158 I32 fname = AvFILLp (protopad_name); 311 PL_op->op_flags |= OPf_STACKED;
159 I32 fpad = AvFILLp (protopad); 312 PL_op->op_private = 0;
313 return PL_ppaddr [OP_ENTERSUB](aTHX);
314}
315
316/** lowlevel stuff **********************************************************/
317
318static SV *
319coro_get_sv (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_sv (name, create);
324#endif
325 return get_sv (name, create);
326}
327
328static AV *
329coro_get_av (pTHX_ const char *name, int create)
330{
331#if PERL_VERSION_ATLEAST (5,10,0)
332 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
333 get_av (name, create);
334#endif
335 return get_av (name, create);
336}
337
338static HV *
339coro_get_hv (pTHX_ const char *name, int create)
340{
341#if PERL_VERSION_ATLEAST (5,10,0)
342 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
343 get_hv (name, create);
344#endif
345 return get_hv (name, create);
346}
347
348INLINE void
349coro_times_update ()
350{
351#ifdef coro_clock_gettime
352 struct timespec ts;
353
354 ts.tv_sec = ts.tv_nsec = 0;
355 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
356 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
357
358 ts.tv_sec = ts.tv_nsec = 0;
359 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
360 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
361#else
362 dTHX;
363 UV tv[2];
364
365 u2time (aTHX_ tv);
366 time_real [0] = tv [0];
367 time_real [1] = tv [1] * 1000;
368#endif
369}
370
371INLINE void
372coro_times_add (struct coro *c)
373{
374 c->t_real [1] += time_real [1];
375 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
376 c->t_real [0] += time_real [0];
377
378 c->t_cpu [1] += time_cpu [1];
379 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
380 c->t_cpu [0] += time_cpu [0];
381}
382
383INLINE void
384coro_times_sub (struct coro *c)
385{
386 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
387 c->t_real [1] -= time_real [1];
388 c->t_real [0] -= time_real [0];
389
390 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
391 c->t_cpu [1] -= time_cpu [1];
392 c->t_cpu [0] -= time_cpu [0];
393}
394
395/*****************************************************************************/
396/* magic glue */
397
398#define CORO_MAGIC_type_cv 26
399#define CORO_MAGIC_type_state PERL_MAGIC_ext
400
401#define CORO_MAGIC_NN(sv, type) \
402 (expect_true (SvMAGIC (sv)->mg_type == type) \
403 ? SvMAGIC (sv) \
404 : mg_find (sv, type))
405
406#define CORO_MAGIC(sv, type) \
407 (expect_true (SvMAGIC (sv)) \
408 ? CORO_MAGIC_NN (sv, type) \
409 : 0)
410
411#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
412#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
413
414INLINE struct coro *
415SvSTATE_ (pTHX_ SV *coro)
416{
417 HV *stash;
418 MAGIC *mg;
419
420 if (SvROK (coro))
421 coro = SvRV (coro);
422
423 if (expect_false (SvTYPE (coro) != SVt_PVHV))
424 croak ("Coro::State object required");
425
426 stash = SvSTASH (coro);
427 if (expect_false (stash != coro_stash && stash != coro_state_stash))
428 {
429 /* very slow, but rare, check */
430 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
431 croak ("Coro::State object required");
432 }
433
434 mg = CORO_MAGIC_state (coro);
435 return (struct coro *)mg->mg_ptr;
436}
437
438#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
439
440/* faster than SvSTATE, but expects a coroutine hv */
441#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
442#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
443
444/*****************************************************************************/
445/* padlist management and caching */
446
447static AV *
448coro_derive_padlist (pTHX_ CV *cv)
449{
450 AV *padlist = CvPADLIST (cv);
160 AV *newpadlist, *newpad_name, *newpad; 451 AV *newpadlist, *newpad;
161 SV **npad;
162
163 newpad_name = newAV ();
164 for (ix = fname; ix >= 0; ix--)
165 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
166
167 newpad = newAV ();
168 av_fill (newpad, AvFILLp (protopad));
169 npad = AvARRAY (newpad);
170 452
171 newpadlist = newAV (); 453 newpadlist = newAV ();
172 AvREAL_off (newpadlist); 454 AvREAL_off (newpadlist);
173 av_store (newpadlist, 0, (SV *) newpad_name); 455#if PERL_VERSION_ATLEAST (5,10,0)
456 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
457#else
458 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
459#endif
460 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
461 --AvFILLp (padlist);
462
463 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
174 av_store (newpadlist, 1, (SV *) newpad); 464 av_store (newpadlist, 1, (SV *)newpad);
175 465
176 av = newAV (); /* will be @_ */ 466 return newpadlist;
177 av_extend (av, 0); 467}
178 av_store (newpad, 0, (SV *) av);
179 AvFLAGS (av) = AVf_REIFY;
180 468
181 for (ix = fpad; ix > 0; ix--) 469static void
470free_padlist (pTHX_ AV *padlist)
471{
472 /* may be during global destruction */
473 if (!IN_DESTRUCT)
182 { 474 {
183 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 475 I32 i = AvFILLp (padlist);
184 476
185 if (namesv && namesv != &PL_sv_undef) 477 while (i > 0) /* special-case index 0 */
186 { 478 {
187 char *name = SvPVX (namesv); /* XXX */ 479 /* we try to be extra-careful here */
480 AV *av = (AV *)AvARRAY (padlist)[i--];
481 I32 j = AvFILLp (av);
188 482
189 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 483 while (j >= 0)
190 { /* lexical from outside? */ 484 SvREFCNT_dec (AvARRAY (av)[j--]);
191 npad[ix] = SvREFCNT_inc (ppad[ix]);
192 }
193 else
194 { /* our own lexical */
195 SV *sv;
196 if (*name == '&')
197 sv = SvREFCNT_inc (ppad[ix]);
198 else if (*name == '@')
199 sv = (SV *) newAV ();
200 else if (*name == '%')
201 sv = (SV *) newHV ();
202 else
203 sv = NEWSV (0, 0);
204 485
205#ifdef SvPADBUSY 486 AvFILLp (av) = -1;
206 if (!SvPADBUSY (sv)) 487 SvREFCNT_dec (av);
207#endif
208 SvPADMY_on (sv);
209
210 npad[ix] = sv;
211 }
212 } 488 }
213 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
214 {
215 npad[ix] = SvREFCNT_inc (ppad[ix]);
216 }
217 else
218 {
219 SV *sv = NEWSV (0, 0);
220 SvPADTMP_on (sv);
221 npad[ix] = sv;
222 }
223 }
224 489
225#if 0 /* return -ENOTUNDERSTOOD */ 490 SvREFCNT_dec (AvARRAY (padlist)[0]);
226 /* Now that vars are all in place, clone nested closures. */
227 491
228 for (ix = fpad; ix > 0; ix--) {
229 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
230 if (namesv
231 && namesv != &PL_sv_undef
232 && !(SvFLAGS(namesv) & SVf_FAKE)
233 && *SvPVX(namesv) == '&'
234 && CvCLONE(ppad[ix]))
235 {
236 CV *kid = cv_clone((CV*)ppad[ix]);
237 SvREFCNT_dec(ppad[ix]);
238 CvCLONE_on(kid);
239 SvPADMY_on(kid);
240 npad[ix] = (SV*)kid;
241 }
242 }
243#endif
244
245 return newpadlist;
246}
247
248STATIC void
249free_padlist (pTHX_ AV *padlist)
250{
251 /* may be during global destruction */
252 if (SvREFCNT (padlist))
253 {
254 I32 i = AvFILLp (padlist); 492 AvFILLp (padlist) = -1;
255 while (i >= 0)
256 {
257 SV **svp = av_fetch (padlist, i--, FALSE);
258 if (svp)
259 {
260 SV *sv;
261 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
262 SvREFCNT_dec (sv);
263
264 SvREFCNT_dec (*svp);
265 }
266 }
267
268 SvREFCNT_dec ((SV*)padlist); 493 SvREFCNT_dec ((SV*)padlist);
269 } 494 }
270} 495}
271 496
272STATIC int 497static int
273coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 498coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
274{ 499{
275 AV *padlist; 500 AV *padlist;
276 AV *av = (AV *)mg->mg_obj; 501 AV *av = (AV *)mg->mg_obj;
502
503 /* perl manages to free our internal AV and _then_ call us */
504 if (IN_DESTRUCT)
505 return 0;
277 506
278 /* casting is fun. */ 507 /* casting is fun. */
279 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 508 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
280 free_padlist (aTHX_ padlist); 509 free_padlist (aTHX_ padlist);
281 510
282 SvREFCNT_dec (av); 511 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
283}
284 512
285#define PERL_MAGIC_coro PERL_MAGIC_ext 513 return 0;
514}
286 515
287static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 516static MGVTBL coro_cv_vtbl = {
517 0, 0, 0, 0,
518 coro_cv_free
519};
288 520
289/* the next two functions merely cache the padlists */ 521/* the next two functions merely cache the padlists */
290STATIC void 522static void
291get_padlist (pTHX_ CV *cv) 523get_padlist (pTHX_ CV *cv)
292{ 524{
293 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 525 MAGIC *mg = CORO_MAGIC_cv (cv);
526 AV *av;
294 527
295 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 528 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
296 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 529 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
297 else 530 else
531 {
532#if CORO_PREFER_PERL_FUNCTIONS
533 /* this is probably cleaner? but also slower! */
534 /* in practise, it seems to be less stable */
535 CV *cp = Perl_cv_clone (aTHX_ cv);
536 CvPADLIST (cv) = CvPADLIST (cp);
537 CvPADLIST (cp) = 0;
538 SvREFCNT_dec (cp);
539#else
298 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 540 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
541#endif
542 }
299} 543}
300 544
301STATIC void 545static void
302put_padlist (pTHX_ CV *cv) 546put_padlist (pTHX_ CV *cv)
303{ 547{
304 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 548 MAGIC *mg = CORO_MAGIC_cv (cv);
549 AV *av;
305 550
306 if (!mg) 551 if (expect_false (!mg))
552 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
553
554 av = (AV *)mg->mg_obj;
555
556 if (expect_false (AvFILLp (av) >= AvMAX (av)))
557 av_extend (av, AvFILLp (av) + 1);
558
559 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
560}
561
562/** load & save, init *******************************************************/
563
564/* swap sv heads, at least logically */
565static void
566swap_svs (pTHX_ Coro__State c)
567{
568 int i;
569
570 for (i = 0; i <= AvFILLp (c->swap_sv); )
571 {
572 SV *a = AvARRAY (c->swap_sv)[i++];
573 SV *b = AvARRAY (c->swap_sv)[i++];
574
575 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
576 SV tmp;
577
578 /* swap sv_any */
579 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
580
581 /* swap sv_flags */
582 SvFLAGS (&tmp) = SvFLAGS (a);
583 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
584 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
585
586#if PERL_VERSION_ATLEAST (5,10,0)
587 /* perl 5.10 complicates this _quite_ a bit, but it also is
588 * is much faster, so no quarrels here. alternatively, we could
589 * sv_upgrade to avoid this.
590 */
307 { 591 {
308 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 592 /* swap sv_u */
309 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 593 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
310 mg->mg_virtual = &vtbl_coro; 594
311 mg->mg_obj = (SV *)newAV (); 595 /* if SvANY points to the head, we need to adjust the pointers,
596 * as the pointer for a still points to b, and maybe vice versa.
597 */
598 #define svany_in_head(type) \
599 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
600
601 if (svany_in_head (SvTYPE (a)))
602 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
603
604 if (svany_in_head (SvTYPE (b)))
605 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
312 } 606 }
313 607#endif
314 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 608 }
315} 609}
316 610
317#define SB do { 611#define SWAP_SVS(coro) \
318#define SE } while (0) 612 if (expect_false ((coro)->swap_sv)) \
613 swap_svs (aTHX_ (coro))
319 614
320#define LOAD(state) load_state(aTHX_ (state));
321#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
322
323#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
324
325static void 615static void
616on_enterleave_call (pTHX_ SV *cb);
617
618static void
326load_state(pTHX_ Coro__State c) 619load_perl (pTHX_ Coro__State c)
327{ 620{
328 PL_dowarn = c->dowarn; 621 perl_slots *slot = c->slot;
329 PL_in_eval = c->in_eval; 622 c->slot = 0;
330 623
331 PL_curstackinfo = c->curstackinfo;
332 PL_curstack = c->curstack;
333 PL_mainstack = c->mainstack; 624 PL_mainstack = c->mainstack;
334 PL_stack_sp = c->stack_sp;
335 PL_op = c->op;
336 PL_curpad = c->curpad;
337 PL_comppad = c->comppad;
338 PL_compcv = c->compcv;
339 PL_stack_base = c->stack_base;
340 PL_stack_max = c->stack_max;
341 PL_tmps_stack = c->tmps_stack;
342 PL_tmps_floor = c->tmps_floor;
343 PL_tmps_ix = c->tmps_ix;
344 PL_tmps_max = c->tmps_max;
345 PL_markstack = c->markstack;
346 PL_markstack_ptr = c->markstack_ptr;
347 PL_markstack_max = c->markstack_max;
348 PL_scopestack = c->scopestack;
349 PL_scopestack_ix = c->scopestack_ix;
350 PL_scopestack_max = c->scopestack_max;
351 PL_savestack = c->savestack;
352 PL_savestack_ix = c->savestack_ix;
353 PL_savestack_max = c->savestack_max;
354 PL_retstack = c->retstack;
355 PL_retstack_ix = c->retstack_ix;
356 PL_retstack_max = c->retstack_max;
357 PL_curpm = c->curpm;
358 PL_curcop = c->curcop;
359 PL_top_env = c->top_env;
360 625
361 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 626 GvSV (PL_defgv) = slot->defsv;
362 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 627 GvAV (PL_defgv) = slot->defav;
363 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 628 GvSV (PL_errgv) = slot->errsv;
629 GvSV (irsgv) = slot->irsgv;
630 GvHV (PL_hintgv) = slot->hinthv;
631
632 #define VAR(name,type) PL_ ## name = slot->name;
633 # include "state.h"
634 #undef VAR
364 635
365 { 636 {
366 dSP; 637 dSP;
638
367 CV *cv; 639 CV *cv;
368 640
369 /* now do the ugly restore mess */ 641 /* now do the ugly restore mess */
370 while ((cv = (CV *)POPs)) 642 while (expect_true (cv = (CV *)POPs))
371 { 643 {
372 AV *padlist = (AV *)POPs;
373
374 if (padlist)
375 {
376 put_padlist (aTHX_ cv); /* mark this padlist as available */ 644 put_padlist (aTHX_ cv); /* mark this padlist as available */
377 CvPADLIST(cv) = padlist; 645 CvDEPTH (cv) = PTR2IV (POPs);
378 } 646 CvPADLIST (cv) = (AV *)POPs;
379
380 ++CvDEPTH(cv);
381 } 647 }
382 648
383 PUTBACK; 649 PUTBACK;
384 } 650 }
385}
386 651
652 slf_frame = c->slf_frame;
653 CORO_THROW = c->except;
654
655 if (expect_false (enable_times))
656 {
657 if (expect_false (!times_valid))
658 coro_times_update ();
659
660 coro_times_sub (c);
661 }
662
663 if (expect_false (c->on_enter))
664 {
665 int i;
666
667 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
668 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
669 }
670
671 SWAP_SVS (c);
672}
673
387static void 674static void
388save_state(pTHX_ Coro__State c, int flags) 675save_perl (pTHX_ Coro__State c)
389{ 676{
677 SWAP_SVS (c);
678
679 if (expect_false (c->on_leave))
680 {
681 int i;
682
683 for (i = AvFILLp (c->on_leave); i >= 0; --i)
684 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
685 }
686
687 times_valid = 0;
688
689 if (expect_false (enable_times))
690 {
691 coro_times_update (); times_valid = 1;
692 coro_times_add (c);
693 }
694
695 c->except = CORO_THROW;
696 c->slf_frame = slf_frame;
697
390 { 698 {
391 dSP; 699 dSP;
392 I32 cxix = cxstack_ix; 700 I32 cxix = cxstack_ix;
393 PERL_CONTEXT *ccstk = cxstack; 701 PERL_CONTEXT *ccstk = cxstack;
394 PERL_SI *top_si = PL_curstackinfo; 702 PERL_SI *top_si = PL_curstackinfo;
… …
396 /* 704 /*
397 * the worst thing you can imagine happens first - we have to save 705 * the worst thing you can imagine happens first - we have to save
398 * (and reinitialize) all cv's in the whole callchain :( 706 * (and reinitialize) all cv's in the whole callchain :(
399 */ 707 */
400 708
401 PUSHs (Nullsv); 709 XPUSHs (Nullsv);
402 /* this loop was inspired by pp_caller */ 710 /* this loop was inspired by pp_caller */
403 for (;;) 711 for (;;)
404 { 712 {
405 while (cxix >= 0) 713 while (expect_true (cxix >= 0))
406 { 714 {
407 PERL_CONTEXT *cx = &ccstk[cxix--]; 715 PERL_CONTEXT *cx = &ccstk[cxix--];
408 716
409 if (CxTYPE(cx) == CXt_SUB) 717 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
410 { 718 {
411 CV *cv = cx->blk_sub.cv; 719 CV *cv = cx->blk_sub.cv;
720
412 if (CvDEPTH(cv)) 721 if (expect_true (CvDEPTH (cv)))
413 { 722 {
414 EXTEND (SP, CvDEPTH(cv)*2); 723 EXTEND (SP, 3);
415
416 while (--CvDEPTH(cv))
417 {
418 /* this tells the restore code to increment CvDEPTH */
419 PUSHs (Nullsv);
420 PUSHs ((SV *)cv);
421 }
422
423 PUSHs ((SV *)CvPADLIST(cv)); 724 PUSHs ((SV *)CvPADLIST (cv));
725 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
424 PUSHs ((SV *)cv); 726 PUSHs ((SV *)cv);
425 727
728 CvDEPTH (cv) = 0;
426 get_padlist (aTHX_ cv); /* this is a monster */ 729 get_padlist (aTHX_ cv);
427 } 730 }
428 } 731 }
429#ifdef CXt_FORMAT
430 else if (CxTYPE(cx) == CXt_FORMAT)
431 {
432 /* I never used formats, so how should I know how these are implemented? */
433 /* my bold guess is as a simple, plain sub... */
434 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
435 }
436#endif
437 } 732 }
438 733
439 if (top_si->si_type == PERLSI_MAIN) 734 if (expect_true (top_si->si_type == PERLSI_MAIN))
440 break; 735 break;
441 736
442 top_si = top_si->si_prev; 737 top_si = top_si->si_prev;
443 ccstk = top_si->si_cxstack; 738 ccstk = top_si->si_cxstack;
444 cxix = top_si->si_cxix; 739 cxix = top_si->si_cxix;
445 } 740 }
446 741
447 PUTBACK; 742 PUTBACK;
448 } 743 }
449 744
450 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 745 /* allocate some space on the context stack for our purposes */
451 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 746 /* we manually unroll here, as usually 2 slots is enough */
452 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 747 if (SLOT_COUNT >= 1) CXINC;
748 if (SLOT_COUNT >= 2) CXINC;
749 if (SLOT_COUNT >= 3) CXINC;
750 {
751 unsigned int i;
752 for (i = 3; i < SLOT_COUNT; ++i)
753 CXINC;
754 }
755 cxstack_ix -= SLOT_COUNT; /* undo allocation */
453 756
454 c->dowarn = PL_dowarn;
455 c->in_eval = PL_in_eval;
456
457 c->curstackinfo = PL_curstackinfo;
458 c->curstack = PL_curstack;
459 c->mainstack = PL_mainstack; 757 c->mainstack = PL_mainstack;
460 c->stack_sp = PL_stack_sp; 758
461 c->op = PL_op; 759 {
462 c->curpad = PL_curpad; 760 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
463 c->comppad = PL_comppad; 761
464 c->compcv = PL_compcv; 762 slot->defav = GvAV (PL_defgv);
465 c->stack_base = PL_stack_base; 763 slot->defsv = DEFSV;
466 c->stack_max = PL_stack_max; 764 slot->errsv = ERRSV;
467 c->tmps_stack = PL_tmps_stack; 765 slot->irsgv = GvSV (irsgv);
468 c->tmps_floor = PL_tmps_floor; 766 slot->hinthv = GvHV (PL_hintgv);
469 c->tmps_ix = PL_tmps_ix; 767
470 c->tmps_max = PL_tmps_max; 768 #define VAR(name,type) slot->name = PL_ ## name;
471 c->markstack = PL_markstack; 769 # include "state.h"
472 c->markstack_ptr = PL_markstack_ptr; 770 #undef VAR
473 c->markstack_max = PL_markstack_max; 771 }
474 c->scopestack = PL_scopestack;
475 c->scopestack_ix = PL_scopestack_ix;
476 c->scopestack_max = PL_scopestack_max;
477 c->savestack = PL_savestack;
478 c->savestack_ix = PL_savestack_ix;
479 c->savestack_max = PL_savestack_max;
480 c->retstack = PL_retstack;
481 c->retstack_ix = PL_retstack_ix;
482 c->retstack_max = PL_retstack_max;
483 c->curpm = PL_curpm;
484 c->curcop = PL_curcop;
485 c->top_env = PL_top_env;
486} 772}
487 773
488/* 774/*
489 * allocate various perl stacks. This is an exact copy 775 * allocate various perl stacks. This is almost an exact copy
490 * of perl.c:init_stacks, except that it uses less memory 776 * of perl.c:init_stacks, except that it uses less memory
491 * on the (sometimes correct) assumption that coroutines do 777 * on the (sometimes correct) assumption that coroutines do
492 * not usually need a lot of stackspace. 778 * not usually need a lot of stackspace.
493 */ 779 */
494STATIC void 780#if CORO_PREFER_PERL_FUNCTIONS
781# define coro_init_stacks(thx) init_stacks ()
782#else
783static void
495coro_init_stacks (pTHX) 784coro_init_stacks (pTHX)
496{ 785{
497 LOCK; 786 PL_curstackinfo = new_stackinfo(32, 8);
498
499 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
500 PL_curstackinfo->si_type = PERLSI_MAIN; 787 PL_curstackinfo->si_type = PERLSI_MAIN;
501 PL_curstack = PL_curstackinfo->si_stack; 788 PL_curstack = PL_curstackinfo->si_stack;
502 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 789 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
503 790
504 PL_stack_base = AvARRAY(PL_curstack); 791 PL_stack_base = AvARRAY(PL_curstack);
505 PL_stack_sp = PL_stack_base; 792 PL_stack_sp = PL_stack_base;
506 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 793 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
507 794
508 New(50,PL_tmps_stack,96,SV*); 795 New(50,PL_tmps_stack,32,SV*);
509 PL_tmps_floor = -1; 796 PL_tmps_floor = -1;
510 PL_tmps_ix = -1; 797 PL_tmps_ix = -1;
511 PL_tmps_max = 96; 798 PL_tmps_max = 32;
512 799
513 New(54,PL_markstack,16,I32); 800 New(54,PL_markstack,16,I32);
514 PL_markstack_ptr = PL_markstack; 801 PL_markstack_ptr = PL_markstack;
515 PL_markstack_max = PL_markstack + 16; 802 PL_markstack_max = PL_markstack + 16;
516 803
517#ifdef SET_MARK_OFFSET 804#ifdef SET_MARK_OFFSET
518 SET_MARK_OFFSET; 805 SET_MARK_OFFSET;
519#endif 806#endif
520 807
521 New(54,PL_scopestack,16,I32); 808 New(54,PL_scopestack,8,I32);
522 PL_scopestack_ix = 0; 809 PL_scopestack_ix = 0;
523 PL_scopestack_max = 16; 810 PL_scopestack_max = 8;
524 811
525 New(54,PL_savestack,96,ANY); 812 New(54,PL_savestack,24,ANY);
526 PL_savestack_ix = 0; 813 PL_savestack_ix = 0;
527 PL_savestack_max = 96; 814 PL_savestack_max = 24;
528 815
816#if !PERL_VERSION_ATLEAST (5,10,0)
529 New(54,PL_retstack,8,OP*); 817 New(54,PL_retstack,4,OP*);
530 PL_retstack_ix = 0; 818 PL_retstack_ix = 0;
531 PL_retstack_max = 8; 819 PL_retstack_max = 4;
532 820#endif
533 UNLOCK;
534} 821}
822#endif
535 823
536/* 824/*
537 * destroy the stacks, the callchain etc... 825 * destroy the stacks, the callchain etc...
538 */ 826 */
539STATIC void 827static void
540destroy_stacks(pTHX) 828coro_destruct_stacks (pTHX)
541{ 829{
542 if (!IN_DESTRUCT)
543 {
544 /* is this ugly, I ask? */
545 LEAVE_SCOPE (0);
546
547 /* sure it is, but more important: is it correct?? :/ */
548 FREETMPS;
549
550 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
551 }
552
553 while (PL_curstackinfo->si_next) 830 while (PL_curstackinfo->si_next)
554 PL_curstackinfo = PL_curstackinfo->si_next; 831 PL_curstackinfo = PL_curstackinfo->si_next;
555 832
556 while (PL_curstackinfo) 833 while (PL_curstackinfo)
557 { 834 {
558 PERL_SI *p = PL_curstackinfo->si_prev; 835 PERL_SI *p = PL_curstackinfo->si_prev;
559 836
560 { /*D*//*remove*/
561 dSP;
562 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
563 PUTBACK; /* possibly superfluous */
564 }
565
566 if (!IN_DESTRUCT) 837 if (!IN_DESTRUCT)
567 {
568 dounwind (-1);/*D*//*remove*/
569 SvREFCNT_dec (PL_curstackinfo->si_stack); 838 SvREFCNT_dec (PL_curstackinfo->si_stack);
570 }
571 839
572 Safefree (PL_curstackinfo->si_cxstack); 840 Safefree (PL_curstackinfo->si_cxstack);
573 Safefree (PL_curstackinfo); 841 Safefree (PL_curstackinfo);
574 PL_curstackinfo = p; 842 PL_curstackinfo = p;
575 } 843 }
576 844
577 Safefree (PL_tmps_stack); 845 Safefree (PL_tmps_stack);
578 Safefree (PL_markstack); 846 Safefree (PL_markstack);
579 Safefree (PL_scopestack); 847 Safefree (PL_scopestack);
580 Safefree (PL_savestack); 848 Safefree (PL_savestack);
849#if !PERL_VERSION_ATLEAST (5,10,0)
581 Safefree (PL_retstack); 850 Safefree (PL_retstack);
582}
583
584static void
585allocate_stack (Coro__State ctx, int alloc)
586{
587 coro_stack *stack;
588
589 New (0, stack, 1, coro_stack);
590
591 stack->refcnt = 1;
592 stack->usecnt = 1;
593 stack->gencnt = ctx->gencnt = 0;
594
595 if (alloc)
596 {
597#if HAVE_MMAP
598 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
599 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
600 if (stack->sptr == (void *)-1)
601#endif 851#endif
852}
853
854#define CORO_RSS \
855 rss += sizeof (SYM (curstackinfo)); \
856 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
857 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
858 rss += SYM (tmps_max) * sizeof (SV *); \
859 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
860 rss += SYM (scopestack_max) * sizeof (I32); \
861 rss += SYM (savestack_max) * sizeof (ANY);
862
863static size_t
864coro_rss (pTHX_ struct coro *coro)
865{
866 size_t rss = sizeof (*coro);
867
868 if (coro->mainstack)
869 {
870 if (coro->flags & CF_RUNNING)
602 { 871 {
603 /*FIXME*//*D*//* reasonable stack size! */ 872 #define SYM(sym) PL_ ## sym
604 stack->ssize = - (STACKSIZE * sizeof (long)); 873 CORO_RSS;
605 New (0, stack->sptr, STACKSIZE, long); 874 #undef SYM
606 } 875 }
607 }
608 else 876 else
609 stack->sptr = 0;
610
611 ctx->stack = stack;
612}
613
614static void
615deallocate_stack (Coro__State ctx)
616{
617 coro_stack *stack = ctx->stack;
618
619 ctx->stack = 0;
620
621 if (stack)
622 {
623 if (!--stack->refcnt)
624 { 877 {
625#ifdef HAVE_MMAP 878 #define SYM(sym) coro->slot->sym
626 if (stack->ssize > 0 && stack->sptr) 879 CORO_RSS;
627 munmap (stack->sptr, stack->ssize); 880 #undef SYM
628 else 881 }
882 }
883
884 return rss;
885}
886
887/** coroutine stack handling ************************************************/
888
889static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
890static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
891static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
892
893/* apparently < 5.8.8 */
894#ifndef MgPV_nolen_const
895#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
896 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
897 (const char*)(mg)->mg_ptr)
629#endif 898#endif
630 Safefree (stack->sptr);
631 899
632 Safefree (stack); 900/*
901 * This overrides the default magic get method of %SIG elements.
902 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
903 * and instead of trying to save and restore the hash elements, we just provide
904 * readback here.
905 */
906static int
907coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
908{
909 const char *s = MgPV_nolen_const (mg);
910
911 if (*s == '_')
912 {
913 SV **svp = 0;
914
915 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
916 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
917
918 if (svp)
919 {
920 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
921 return 0;
633 } 922 }
634 else if (ctx->gencnt == stack->gencnt) 923 }
635 --stack->usecnt; 924
925 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
926}
927
928static int
929coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
930{
931 const char *s = MgPV_nolen_const (mg);
932
933 if (*s == '_')
636 } 934 {
637} 935 SV **svp = 0;
638 936
937 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
938 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
939
940 if (svp)
941 {
942 SV *old = *svp;
943 *svp = 0;
944 SvREFCNT_dec (old);
945 return 0;
946 }
947 }
948
949 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
950}
951
639static void 952static int
640setup_coro (void *arg) 953coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
954{
955 const char *s = MgPV_nolen_const (mg);
956
957 if (*s == '_')
958 {
959 SV **svp = 0;
960
961 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
962 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
963
964 if (svp)
965 {
966 SV *old = *svp;
967 *svp = SvOK (sv) ? newSVsv (sv) : 0;
968 SvREFCNT_dec (old);
969 return 0;
970 }
971 }
972
973 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
974}
975
976static void
977prepare_nop (pTHX_ struct coro_transfer_args *ta)
978{
979 /* kind of mega-hacky, but works */
980 ta->next = ta->prev = (struct coro *)ta;
981}
982
983static int
984slf_check_nop (pTHX_ struct CoroSLF *frame)
985{
986 return 0;
987}
988
989static int
990slf_check_repeat (pTHX_ struct CoroSLF *frame)
991{
992 return 1;
993}
994
995static UNOP init_perl_op;
996
997static void NOINLINE /* noinline to keep it out of the transfer fast path */
998init_perl (pTHX_ struct coro *coro)
641{ 999{
642 /* 1000 /*
643 * emulate part of the perl startup here. 1001 * emulate part of the perl startup here.
644 */ 1002 */
1003 coro_init_stacks (aTHX);
1004
1005 PL_runops = RUNOPS_DEFAULT;
1006 PL_curcop = &PL_compiling;
1007 PL_in_eval = EVAL_NULL;
1008 PL_comppad = 0;
1009 PL_comppad_name = 0;
1010 PL_comppad_name_fill = 0;
1011 PL_comppad_name_floor = 0;
1012 PL_curpm = 0;
1013 PL_curpad = 0;
1014 PL_localizing = 0;
1015 PL_dirty = 0;
1016 PL_restartop = 0;
1017#if PERL_VERSION_ATLEAST (5,10,0)
1018 PL_parser = 0;
1019#endif
1020 PL_hints = 0;
1021
1022 /* recreate the die/warn hooks */
1023 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1024 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1025
1026 GvSV (PL_defgv) = newSV (0);
1027 GvAV (PL_defgv) = coro->args; coro->args = 0;
1028 GvSV (PL_errgv) = newSV (0);
1029 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1030 GvHV (PL_hintgv) = 0;
1031 PL_rs = newSVsv (GvSV (irsgv));
1032 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1033
1034 {
1035 dSP;
1036 UNOP myop;
1037
1038 Zero (&myop, 1, UNOP);
1039 myop.op_next = Nullop;
1040 myop.op_type = OP_ENTERSUB;
1041 myop.op_flags = OPf_WANT_VOID;
1042
1043 PUSHMARK (SP);
1044 PUSHs ((SV *)coro->startcv);
1045 PUTBACK;
1046 PL_op = (OP *)&myop;
1047 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1048 }
1049
1050 /* this newly created coroutine might be run on an existing cctx which most
1051 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1052 */
1053 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1054 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1055
1056 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1057 init_perl_op.op_next = PL_op;
1058 init_perl_op.op_type = OP_ENTERSUB;
1059 init_perl_op.op_ppaddr = pp_slf;
1060 /* no flags etc. required, as an init function won't be called */
1061
1062 PL_op = (OP *)&init_perl_op;
1063
1064 /* copy throw, in case it was set before init_perl */
1065 CORO_THROW = coro->except;
1066
1067 SWAP_SVS (coro);
1068
1069 if (expect_false (enable_times))
1070 {
1071 coro_times_update ();
1072 coro_times_sub (coro);
1073 }
1074}
1075
1076static void
1077coro_unwind_stacks (pTHX)
1078{
1079 if (!IN_DESTRUCT)
1080 {
1081 /* restore all saved variables and stuff */
1082 LEAVE_SCOPE (0);
1083 assert (PL_tmps_floor == -1);
1084
1085 /* free all temporaries */
1086 FREETMPS;
1087 assert (PL_tmps_ix == -1);
1088
1089 /* unwind all extra stacks */
1090 POPSTACK_TO (PL_mainstack);
1091
1092 /* unwind main stack */
1093 dounwind (-1);
1094 }
1095}
1096
1097static void
1098destroy_perl (pTHX_ struct coro *coro)
1099{
1100 SV *svf [9];
1101
1102 {
1103 struct coro *current = SvSTATE_current;
1104
1105 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1106
1107 save_perl (aTHX_ current);
1108 load_perl (aTHX_ coro);
1109
1110 coro_unwind_stacks (aTHX);
1111 coro_destruct_stacks (aTHX);
1112
1113 /* restore swapped sv's */
1114 SWAP_SVS (coro);
1115
1116 // now save some sv's to be free'd later
1117 svf [0] = GvSV (PL_defgv);
1118 svf [1] = (SV *)GvAV (PL_defgv);
1119 svf [2] = GvSV (PL_errgv);
1120 svf [3] = (SV *)PL_defoutgv;
1121 svf [4] = PL_rs;
1122 svf [5] = GvSV (irsgv);
1123 svf [6] = (SV *)GvHV (PL_hintgv);
1124 svf [7] = PL_diehook;
1125 svf [8] = PL_warnhook;
1126 assert (9 == sizeof (svf) / sizeof (*svf));
1127
1128 load_perl (aTHX_ current);
1129 }
1130
1131 {
1132 unsigned int i;
1133
1134 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1135 SvREFCNT_dec (svf [i]);
1136
1137 SvREFCNT_dec (coro->saved_deffh);
1138 SvREFCNT_dec (coro->rouse_cb);
1139 SvREFCNT_dec (coro->invoke_cb);
1140 SvREFCNT_dec (coro->invoke_av);
1141 }
1142}
1143
1144INLINE void
1145free_coro_mortal (pTHX)
1146{
1147 if (expect_true (coro_mortal))
1148 {
1149 SvREFCNT_dec (coro_mortal);
1150 coro_mortal = 0;
1151 }
1152}
1153
1154static int
1155runops_trace (pTHX)
1156{
1157 COP *oldcop = 0;
1158 int oldcxix = -2;
1159
1160 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1161 {
1162 PERL_ASYNC_CHECK ();
1163
1164 if (cctx_current->flags & CC_TRACE_ALL)
1165 {
1166 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1167 {
1168 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1169 SV **bot, **top;
1170 AV *av = newAV (); /* return values */
1171 SV **cb;
1172 dSP;
1173
1174 GV *gv = CvGV (cx->blk_sub.cv);
1175 SV *fullname = sv_2mortal (newSV (0));
1176 if (isGV (gv))
1177 gv_efullname3 (fullname, gv, 0);
1178
1179 bot = PL_stack_base + cx->blk_oldsp + 1;
1180 top = cx->blk_gimme == G_ARRAY ? SP + 1
1181 : cx->blk_gimme == G_SCALAR ? bot + 1
1182 : bot;
1183
1184 av_extend (av, top - bot);
1185 while (bot < top)
1186 av_push (av, SvREFCNT_inc_NN (*bot++));
1187
1188 PL_runops = RUNOPS_DEFAULT;
1189 ENTER;
1190 SAVETMPS;
1191 EXTEND (SP, 3);
1192 PUSHMARK (SP);
1193 PUSHs (&PL_sv_no);
1194 PUSHs (fullname);
1195 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1196 PUTBACK;
1197 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1198 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1199 SPAGAIN;
1200 FREETMPS;
1201 LEAVE;
1202 PL_runops = runops_trace;
1203 }
1204
1205 if (oldcop != PL_curcop)
1206 {
1207 oldcop = PL_curcop;
1208
1209 if (PL_curcop != &PL_compiling)
1210 {
1211 SV **cb;
1212
1213 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1214 {
1215 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1216
1217 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1218 {
1219 dSP;
1220 GV *gv = CvGV (cx->blk_sub.cv);
1221 SV *fullname = sv_2mortal (newSV (0));
1222
1223 if (isGV (gv))
1224 gv_efullname3 (fullname, gv, 0);
1225
1226 PL_runops = RUNOPS_DEFAULT;
1227 ENTER;
1228 SAVETMPS;
1229 EXTEND (SP, 3);
1230 PUSHMARK (SP);
1231 PUSHs (&PL_sv_yes);
1232 PUSHs (fullname);
1233 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1234 PUTBACK;
1235 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1236 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1237 SPAGAIN;
1238 FREETMPS;
1239 LEAVE;
1240 PL_runops = runops_trace;
1241 }
1242
1243 oldcxix = cxstack_ix;
1244 }
1245
1246 if (cctx_current->flags & CC_TRACE_LINE)
1247 {
1248 dSP;
1249
1250 PL_runops = RUNOPS_DEFAULT;
1251 ENTER;
1252 SAVETMPS;
1253 EXTEND (SP, 3);
1254 PL_runops = RUNOPS_DEFAULT;
1255 PUSHMARK (SP);
1256 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1257 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1258 PUTBACK;
1259 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1260 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1261 SPAGAIN;
1262 FREETMPS;
1263 LEAVE;
1264 PL_runops = runops_trace;
1265 }
1266 }
1267 }
1268 }
1269 }
1270
1271 TAINT_NOT;
1272 return 0;
1273}
1274
1275static struct CoroSLF cctx_ssl_frame;
1276
1277static void
1278slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1279{
1280 ta->prev = 0;
1281}
1282
1283static int
1284slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1285{
1286 *frame = cctx_ssl_frame;
1287
1288 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1289}
1290
1291/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1292static void NOINLINE
1293cctx_prepare (pTHX)
1294{
1295 PL_top_env = &PL_start_env;
1296
1297 if (cctx_current->flags & CC_TRACE)
1298 PL_runops = runops_trace;
1299
1300 /* we already must be executing an SLF op, there is no other valid way
1301 * that can lead to creation of a new cctx */
1302 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1303 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1304
1305 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1306 cctx_ssl_frame = slf_frame;
1307
1308 slf_frame.prepare = slf_prepare_set_stacklevel;
1309 slf_frame.check = slf_check_set_stacklevel;
1310}
1311
1312/* the tail of transfer: execute stuff we can only do after a transfer */
1313INLINE void
1314transfer_tail (pTHX)
1315{
1316 free_coro_mortal (aTHX);
1317}
1318
1319/*
1320 * this is a _very_ stripped down perl interpreter ;)
1321 */
1322static void
1323cctx_run (void *arg)
1324{
1325#ifdef USE_ITHREADS
1326# if CORO_PTHREAD
1327 PERL_SET_CONTEXT (coro_thx);
1328# endif
1329#endif
1330 {
1331 dTHX;
1332
1333 /* normally we would need to skip the entersub here */
1334 /* not doing so will re-execute it, which is exactly what we want */
1335 /* PL_nop = PL_nop->op_next */
1336
1337 /* inject a fake subroutine call to cctx_init */
1338 cctx_prepare (aTHX);
1339
1340 /* cctx_run is the alternative tail of transfer() */
1341 transfer_tail (aTHX);
1342
1343 /* somebody or something will hit me for both perl_run and PL_restartop */
1344 PL_restartop = PL_op;
1345 perl_run (PL_curinterp);
1346 /*
1347 * Unfortunately, there is no way to get at the return values of the
1348 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1349 * runtime errors here, as this is just a random interpreter, not a thread.
1350 */
1351
1352 /*
1353 * If perl-run returns we assume exit() was being called or the coro
1354 * fell off the end, which seems to be the only valid (non-bug)
1355 * reason for perl_run to return. We try to exit by jumping to the
1356 * bootstrap-time "top" top_env, as we cannot restore the "main"
1357 * coroutine as Coro has no such concept.
1358 * This actually isn't valid with the pthread backend, but OSes requiring
1359 * that backend are too broken to do it in a standards-compliant way.
1360 */
1361 PL_top_env = main_top_env;
1362 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1363 }
1364}
1365
1366static coro_cctx *
1367cctx_new ()
1368{
1369 coro_cctx *cctx;
1370
1371 ++cctx_count;
1372 New (0, cctx, 1, coro_cctx);
1373
1374 cctx->gen = cctx_gen;
1375 cctx->flags = 0;
1376 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1377
1378 return cctx;
1379}
1380
1381/* create a new cctx only suitable as source */
1382static coro_cctx *
1383cctx_new_empty ()
1384{
1385 coro_cctx *cctx = cctx_new ();
1386
1387 cctx->sptr = 0;
1388 coro_create (&cctx->cctx, 0, 0, 0, 0);
1389
1390 return cctx;
1391}
1392
1393/* create a new cctx suitable as destination/running a perl interpreter */
1394static coro_cctx *
1395cctx_new_run ()
1396{
1397 coro_cctx *cctx = cctx_new ();
1398 void *stack_start;
1399 size_t stack_size;
1400
1401#if HAVE_MMAP
1402 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1403 /* mmap supposedly does allocate-on-write for us */
1404 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1405
1406 if (cctx->sptr != (void *)-1)
1407 {
1408 #if CORO_STACKGUARD
1409 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1410 #endif
1411 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1412 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1413 cctx->flags |= CC_MAPPED;
1414 }
1415 else
1416#endif
1417 {
1418 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1419 New (0, cctx->sptr, cctx_stacksize, long);
1420
1421 if (!cctx->sptr)
1422 {
1423 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1424 _exit (EXIT_FAILURE);
1425 }
1426
1427 stack_start = cctx->sptr;
1428 stack_size = cctx->ssize;
1429 }
1430
1431 #if CORO_USE_VALGRIND
1432 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1433 #endif
1434
1435 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1436
1437 return cctx;
1438}
1439
1440static void
1441cctx_destroy (coro_cctx *cctx)
1442{
1443 if (!cctx)
1444 return;
1445
1446 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1447
1448 --cctx_count;
1449 coro_destroy (&cctx->cctx);
1450
1451 /* coro_transfer creates new, empty cctx's */
1452 if (cctx->sptr)
1453 {
1454 #if CORO_USE_VALGRIND
1455 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1456 #endif
1457
1458#if HAVE_MMAP
1459 if (cctx->flags & CC_MAPPED)
1460 munmap (cctx->sptr, cctx->ssize);
1461 else
1462#endif
1463 Safefree (cctx->sptr);
1464 }
1465
1466 Safefree (cctx);
1467}
1468
1469/* wether this cctx should be destructed */
1470#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1471
1472static coro_cctx *
1473cctx_get (pTHX)
1474{
1475 while (expect_true (cctx_first))
1476 {
1477 coro_cctx *cctx = cctx_first;
1478 cctx_first = cctx->next;
1479 --cctx_idle;
1480
1481 if (expect_true (!CCTX_EXPIRED (cctx)))
1482 return cctx;
1483
1484 cctx_destroy (cctx);
1485 }
1486
1487 return cctx_new_run ();
1488}
1489
1490static void
1491cctx_put (coro_cctx *cctx)
1492{
1493 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1494
1495 /* free another cctx if overlimit */
1496 if (expect_false (cctx_idle >= cctx_max_idle))
1497 {
1498 coro_cctx *first = cctx_first;
1499 cctx_first = first->next;
1500 --cctx_idle;
1501
1502 cctx_destroy (first);
1503 }
1504
1505 ++cctx_idle;
1506 cctx->next = cctx_first;
1507 cctx_first = cctx;
1508}
1509
1510/** coroutine switching *****************************************************/
1511
1512static void
1513transfer_check (pTHX_ struct coro *prev, struct coro *next)
1514{
1515 /* TODO: throwing up here is considered harmful */
1516
1517 if (expect_true (prev != next))
1518 {
1519 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1520 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1521
1522 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1523 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1524
1525#if !PERL_VERSION_ATLEAST (5,10,0)
1526 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1527 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1528#endif
1529 }
1530}
1531
1532/* always use the TRANSFER macro */
1533static void NOINLINE /* noinline so we have a fixed stackframe */
1534transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1535{
1536 dSTACKLEVEL;
1537
1538 /* sometimes transfer is only called to set idle_sp */
1539 if (expect_false (!prev))
1540 {
1541 cctx_current->idle_sp = STACKLEVEL;
1542 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1543 }
1544 else if (expect_true (prev != next))
1545 {
1546 coro_cctx *cctx_prev;
1547
1548 if (expect_false (prev->flags & CF_NEW))
1549 {
1550 /* create a new empty/source context */
1551 prev->flags &= ~CF_NEW;
1552 prev->flags |= CF_RUNNING;
1553 }
1554
1555 prev->flags &= ~CF_RUNNING;
1556 next->flags |= CF_RUNNING;
1557
1558 /* first get rid of the old state */
1559 save_perl (aTHX_ prev);
1560
1561 if (expect_false (next->flags & CF_NEW))
1562 {
1563 /* need to start coroutine */
1564 next->flags &= ~CF_NEW;
1565 /* setup coroutine call */
1566 init_perl (aTHX_ next);
1567 }
1568 else
1569 load_perl (aTHX_ next);
1570
1571 /* possibly untie and reuse the cctx */
1572 if (expect_true (
1573 cctx_current->idle_sp == STACKLEVEL
1574 && !(cctx_current->flags & CC_TRACE)
1575 && !force_cctx
1576 ))
1577 {
1578 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1579 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1580
1581 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1582 /* without this the next cctx_get might destroy the running cctx while still in use */
1583 if (expect_false (CCTX_EXPIRED (cctx_current)))
1584 if (expect_true (!next->cctx))
1585 next->cctx = cctx_get (aTHX);
1586
1587 cctx_put (cctx_current);
1588 }
1589 else
1590 prev->cctx = cctx_current;
1591
1592 ++next->usecount;
1593
1594 cctx_prev = cctx_current;
1595 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1596
1597 next->cctx = 0;
1598
1599 if (expect_false (cctx_prev != cctx_current))
1600 {
1601 cctx_prev->top_env = PL_top_env;
1602 PL_top_env = cctx_current->top_env;
1603 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1604 }
1605
1606 transfer_tail (aTHX);
1607 }
1608}
1609
1610#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1611#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1612
1613/** high level stuff ********************************************************/
1614
1615static int
1616coro_state_destroy (pTHX_ struct coro *coro)
1617{
1618 if (coro->flags & CF_DESTROYED)
1619 return 0;
1620
1621 if (coro->on_destroy && !PL_dirty)
1622 coro->on_destroy (aTHX_ coro);
1623
1624 coro->flags |= CF_DESTROYED;
1625
1626 if (coro->flags & CF_READY)
1627 {
1628 /* reduce nready, as destroying a ready coro effectively unreadies it */
1629 /* alternative: look through all ready queues and remove the coro */
1630 --coro_nready;
1631 }
1632 else
1633 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1634
1635 if (coro->mainstack
1636 && coro->mainstack != main_mainstack
1637 && coro->slot
1638 && !PL_dirty)
1639 destroy_perl (aTHX_ coro);
1640
1641 if (coro->next) coro->next->prev = coro->prev;
1642 if (coro->prev) coro->prev->next = coro->next;
1643 if (coro == coro_first) coro_first = coro->next;
1644
1645 cctx_destroy (coro->cctx);
1646 SvREFCNT_dec (coro->startcv);
1647 SvREFCNT_dec (coro->args);
1648 SvREFCNT_dec (coro->swap_sv);
1649 SvREFCNT_dec (CORO_THROW);
1650
1651 return 1;
1652}
1653
1654static int
1655coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1656{
1657 struct coro *coro = (struct coro *)mg->mg_ptr;
1658 mg->mg_ptr = 0;
1659
1660 coro->hv = 0;
1661
1662 if (--coro->refcnt < 0)
1663 {
1664 coro_state_destroy (aTHX_ coro);
1665 Safefree (coro);
1666 }
1667
1668 return 0;
1669}
1670
1671static int
1672coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1673{
1674 struct coro *coro = (struct coro *)mg->mg_ptr;
1675
1676 ++coro->refcnt;
1677
1678 return 0;
1679}
1680
1681static MGVTBL coro_state_vtbl = {
1682 0, 0, 0, 0,
1683 coro_state_free,
1684 0,
1685#ifdef MGf_DUP
1686 coro_state_dup,
1687#else
1688# define MGf_DUP 0
1689#endif
1690};
1691
1692static void
1693prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1694{
1695 ta->prev = SvSTATE (prev_sv);
1696 ta->next = SvSTATE (next_sv);
1697 TRANSFER_CHECK (*ta);
1698}
1699
1700static void
1701api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1702{
1703 struct coro_transfer_args ta;
1704
1705 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1706 TRANSFER (ta, 1);
1707}
1708
1709/** Coro ********************************************************************/
1710
1711INLINE void
1712coro_enq (pTHX_ struct coro *coro)
1713{
1714 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1715
1716 SvREFCNT_inc_NN (coro->hv);
1717
1718 coro->next_ready = 0;
1719 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1720 ready [1] = coro;
1721}
1722
1723INLINE struct coro *
1724coro_deq (pTHX)
1725{
1726 int prio;
1727
1728 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1729 {
1730 struct coro **ready = coro_ready [prio];
1731
1732 if (ready [0])
1733 {
1734 struct coro *coro = ready [0];
1735 ready [0] = coro->next_ready;
1736 return coro;
1737 }
1738 }
1739
1740 return 0;
1741}
1742
1743static void
1744invoke_sv_ready_hook_helper (void)
1745{
645 dTHX; 1746 dTHX;
646 dSP; 1747 dSP;
647 Coro__State ctx = (Coro__State)arg;
648 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
649 1748
650 coro_init_stacks (aTHX); 1749 ENTER;
651 /*PL_curcop = 0;*/ 1750 SAVETMPS;
652 /*PL_in_eval = PL_in_eval;*/ /* inherit */
653 SvREFCNT_dec (GvAV (PL_defgv));
654 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
655 1751
656 SPAGAIN;
657
658 if (ctx->stack)
659 {
660 ctx->cursp = 0;
661
662 PUSHMARK(SP); 1752 PUSHMARK (SP);
663 PUTBACK; 1753 PUTBACK;
664 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1754 call_sv (coro_readyhook, G_VOID | G_DISCARD);
665 1755
666 if (SvTRUE (ERRSV)) 1756 FREETMPS;
667 croak (NULL); 1757 LEAVE;
668 else 1758}
669 croak ("FATAL: CCTXT coroutine returned!"); 1759
1760static int
1761api_ready (pTHX_ SV *coro_sv)
1762{
1763 struct coro *coro = SvSTATE (coro_sv);
1764
1765 if (coro->flags & CF_READY)
1766 return 0;
1767
1768 coro->flags |= CF_READY;
1769
1770 coro_enq (aTHX_ coro);
1771
1772 if (!coro_nready++)
1773 if (coroapi.readyhook)
1774 coroapi.readyhook ();
1775
1776 return 1;
1777}
1778
1779static int
1780api_is_ready (pTHX_ SV *coro_sv)
1781{
1782 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1783}
1784
1785/* expects to own a reference to next->hv */
1786INLINE void
1787prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1788{
1789 SV *prev_sv = SvRV (coro_current);
1790
1791 ta->prev = SvSTATE_hv (prev_sv);
1792 ta->next = next;
1793
1794 TRANSFER_CHECK (*ta);
1795
1796 SvRV_set (coro_current, (SV *)next->hv);
1797
1798 free_coro_mortal (aTHX);
1799 coro_mortal = prev_sv;
1800}
1801
1802static void
1803prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1804{
1805 for (;;)
670 } 1806 {
671 else 1807 struct coro *next = coro_deq (aTHX);
672 {
673 UNOP myop;
674 1808
675 PL_op = (OP *)&myop; 1809 if (expect_true (next))
676
677 Zero(&myop, 1, UNOP);
678 myop.op_next = Nullop;
679 myop.op_flags = OPf_WANT_VOID;
680
681 PUSHMARK(SP);
682 XPUSHs (sub_init);
683 /*
684 * the next line is slightly wrong, as PL_op->op_next
685 * is actually being executed so we skip the first op.
686 * that doesn't matter, though, since it is only
687 * pp_nextstate and we never return...
688 * ah yes, and I don't care anyways ;)
689 */
690 PUTBACK;
691 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
692 SPAGAIN;
693
694 ENTER; /* necessary e.g. for dounwind */
695 }
696}
697
698static void
699continue_coro (void *arg)
700{
701 /*
702 * this is a _very_ stripped down perl interpreter ;)
703 */
704 dTHX;
705 Coro__State ctx = (Coro__State)arg;
706 JMPENV coro_start_env;
707
708 PL_top_env = &ctx->start_env;
709
710 ctx->cursp = 0;
711 PL_op = PL_op->op_next;
712 CALLRUNOPS(aTHX);
713
714 abort ();
715}
716
717STATIC void
718transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
719{
720 dSTACKLEVEL;
721
722 if (prev != next)
723 {
724 if (next->mainstack)
725 { 1810 {
726 LOCK; 1811 /* cannot transfer to destroyed coros, skip and look for next */
727 SAVE (prev, flags); 1812 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
728 LOAD (next); 1813 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
729 UNLOCK; 1814 else
730
731 /* mark this state as in-use */
732 next->mainstack = 0;
733 next->tmps_ix = -2;
734
735 /* stacklevel changed? if yes, grab the stack for us! */
736 if (flags & TRANSFER_SAVE_CCTXT)
737 { 1815 {
738 if (!prev->stack) 1816 next->flags &= ~CF_READY;
739 allocate_stack (prev, 0); 1817 --coro_nready;
740 else if (prev->cursp != stacklevel 1818
741 && prev->stack->usecnt > 1) 1819 prepare_schedule_to (aTHX_ ta, next);
742 { 1820 break;
743 prev->gencnt = ++prev->stack->gencnt;
744 prev->stack->usecnt = 1;
745 }
746
747 /* has our stack been invalidated? */
748 if (next->stack && next->stack->gencnt != next->gencnt)
749 {
750 deallocate_stack (next);
751 allocate_stack (next, 1);
752 coro_create (&(next->stack->cctx),
753 continue_coro, (void *)next,
754 next->stack->sptr, labs (next->stack->ssize));
755 }
756
757 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
758 prev->cursp = stacklevel;
759 /* don't add any code here */
760 } 1821 }
761 else
762 next->cursp = stacklevel;
763 } 1822 }
764 else if (next->tmps_ix == -2)
765 croak ("tried to transfer to running coroutine");
766 else 1823 else
767 { 1824 {
768 LOCK; 1825 /* nothing to schedule: call the idle handler */
769 SAVE (prev, -1); /* first get rid of the old state */ 1826 if (SvROK (sv_idle)
770 UNLOCK; 1827 && SvOBJECT (SvRV (sv_idle)))
771
772 if (flags & TRANSFER_SAVE_CCTXT)
773 { 1828 {
774 if (!prev->stack) 1829 if (SvRV (sv_idle) == SvRV (coro_current))
775 allocate_stack (prev, 0); 1830 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
776 1831
777 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1832 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
778 { 1833 api_ready (aTHX_ SvRV (sv_idle));
779 PL_top_env = &next->start_env; 1834 --coro_nready;
780
781 setup_coro (next);
782 next->cursp = stacklevel;
783
784 prev->stack->refcnt++;
785 prev->stack->usecnt++;
786 next->stack = prev->stack;
787 next->gencnt = prev->gencnt;
788 }
789 else
790 {
791 assert (!next->stack);
792 allocate_stack (next, 1);
793 coro_create (&(next->stack->cctx),
794 setup_coro, (void *)next,
795 next->stack->sptr, labs (next->stack->ssize));
796 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
797 prev->cursp = stacklevel;
798 /* don't add any code here */
799 }
800 } 1835 }
801 else 1836 else
802 { 1837 {
803 setup_coro (next); 1838 /* TODO: deprecated, remove, cannot work reliably *//*D*/
804 next->cursp = stacklevel; 1839 dSP;
1840
1841 ENTER;
1842 SAVETMPS;
1843
1844 PUSHMARK (SP);
1845 PUTBACK;
1846 call_sv (sv_idle, G_VOID | G_DISCARD);
1847
1848 FREETMPS;
1849 LEAVE;
805 } 1850 }
806 } 1851 }
807 } 1852 }
1853}
808 1854
809 LOCK; 1855INLINE void
1856prepare_cede (pTHX_ struct coro_transfer_args *ta)
1857{
1858 api_ready (aTHX_ coro_current);
1859 prepare_schedule (aTHX_ ta);
1860}
1861
1862INLINE void
1863prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1864{
1865 SV *prev = SvRV (coro_current);
1866
810 if (coro_mortal) 1867 if (coro_nready)
811 {
812 SvREFCNT_dec (coro_mortal);
813 coro_mortal = 0;
814 } 1868 {
815 UNLOCK; 1869 prepare_schedule (aTHX_ ta);
816} 1870 api_ready (aTHX_ prev);
817
818#define SV_CORO(sv,func) \
819 do { \
820 if (SvROK (sv)) \
821 sv = SvRV (sv); \
822 \
823 if (SvTYPE (sv) == SVt_PVHV) \
824 { \
825 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
826 \
827 if (!he) \
828 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
829 \
830 (sv) = SvRV (HeVAL(he)); \
831 } \
832 \
833 /* must also be changed inside Coro::Cont::yield */ \
834 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
835 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
836 \
837 } while(0)
838
839#define SvSTATE(sv) (struct coro *)SvIV (sv)
840
841static void
842api_transfer(pTHX_ SV *prev, SV *next, int flags)
843{
844 SV_CORO (prev, "Coro::transfer");
845 SV_CORO (next, "Coro::transfer");
846
847 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
848}
849
850/** Coro ********************************************************************/
851
852#define PRIO_MAX 3
853#define PRIO_HIGH 1
854#define PRIO_NORMAL 0
855#define PRIO_LOW -1
856#define PRIO_IDLE -3
857#define PRIO_MIN -4
858
859/* for Coro.pm */
860static GV *coro_current, *coro_idle;
861static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
862static int coro_nready;
863
864static void
865coro_enq (pTHX_ SV *sv)
866{
867 if (SvTYPE (sv) == SVt_PVHV)
868 { 1871 }
869 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1872 else
870 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1873 prepare_nop (aTHX_ ta);
1874}
871 1875
872 prio = prio > PRIO_MAX ? PRIO_MAX 1876static void
873 : prio < PRIO_MIN ? PRIO_MIN 1877api_schedule (pTHX)
874 : prio; 1878{
1879 struct coro_transfer_args ta;
875 1880
876 av_push (coro_ready [prio - PRIO_MIN], sv); 1881 prepare_schedule (aTHX_ &ta);
877 coro_nready++; 1882 TRANSFER (ta, 1);
1883}
878 1884
1885static void
1886api_schedule_to (pTHX_ SV *coro_sv)
1887{
1888 struct coro_transfer_args ta;
1889 struct coro *next = SvSTATE (coro_sv);
1890
1891 SvREFCNT_inc_NN (coro_sv);
1892 prepare_schedule_to (aTHX_ &ta, next);
1893}
1894
1895static int
1896api_cede (pTHX)
1897{
1898 struct coro_transfer_args ta;
1899
1900 prepare_cede (aTHX_ &ta);
1901
1902 if (expect_true (ta.prev != ta.next))
1903 {
1904 TRANSFER (ta, 1);
879 return; 1905 return 1;
1906 }
1907 else
1908 return 0;
1909}
1910
1911static int
1912api_cede_notself (pTHX)
1913{
1914 if (coro_nready)
1915 {
1916 struct coro_transfer_args ta;
1917
1918 prepare_cede_notself (aTHX_ &ta);
1919 TRANSFER (ta, 1);
1920 return 1;
1921 }
1922 else
1923 return 0;
1924}
1925
1926static void
1927api_trace (pTHX_ SV *coro_sv, int flags)
1928{
1929 struct coro *coro = SvSTATE (coro_sv);
1930
1931 if (coro->flags & CF_RUNNING)
1932 croak ("cannot enable tracing on a running coroutine, caught");
1933
1934 if (flags & CC_TRACE)
1935 {
1936 if (!coro->cctx)
1937 coro->cctx = cctx_new_run ();
1938 else if (!(coro->cctx->flags & CC_TRACE))
1939 croak ("cannot enable tracing on coroutine with custom stack, caught");
1940
1941 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1942 }
1943 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1944 {
1945 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1946
1947 if (coro->flags & CF_RUNNING)
1948 PL_runops = RUNOPS_DEFAULT;
1949 else
1950 coro->slot->runops = RUNOPS_DEFAULT;
1951 }
1952}
1953
1954static void
1955coro_call_on_destroy (pTHX_ struct coro *coro)
1956{
1957 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1958 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1959
1960 if (on_destroyp)
1961 {
1962 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1963
1964 while (AvFILLp (on_destroy) >= 0)
1965 {
1966 dSP; /* don't disturb outer sp */
1967 SV *cb = av_pop (on_destroy);
1968
1969 PUSHMARK (SP);
1970
1971 if (statusp)
1972 {
1973 int i;
1974 AV *status = (AV *)SvRV (*statusp);
1975 EXTEND (SP, AvFILLp (status) + 1);
1976
1977 for (i = 0; i <= AvFILLp (status); ++i)
1978 PUSHs (AvARRAY (status)[i]);
1979 }
1980
1981 PUTBACK;
1982 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1983 }
1984 }
1985}
1986
1987static void
1988slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1989{
1990 int i;
1991 HV *hv = (HV *)SvRV (coro_current);
1992 AV *av = newAV ();
1993
1994 /* items are actually not so common, so optimise for this case */
1995 if (items)
1996 {
1997 av_extend (av, items - 1);
1998
1999 for (i = 0; i < items; ++i)
2000 av_push (av, SvREFCNT_inc_NN (arg [i]));
2001 }
2002
2003 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2004
2005 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2006 api_ready (aTHX_ sv_manager);
2007
2008 frame->prepare = prepare_schedule;
2009 frame->check = slf_check_repeat;
2010
2011 /* as a minor optimisation, we could unwind all stacks here */
2012 /* but that puts extra pressure on pp_slf, and is not worth much */
2013 /*coro_unwind_stacks (aTHX);*/
2014}
2015
2016/*****************************************************************************/
2017/* async pool handler */
2018
2019static int
2020slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2021{
2022 HV *hv = (HV *)SvRV (coro_current);
2023 struct coro *coro = (struct coro *)frame->data;
2024
2025 if (!coro->invoke_cb)
2026 return 1; /* loop till we have invoke */
2027 else
2028 {
2029 hv_store (hv, "desc", sizeof ("desc") - 1,
2030 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2031
2032 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2033
2034 {
2035 dSP;
2036 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2037 PUTBACK;
880 } 2038 }
881 2039
882 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2040 SvREFCNT_dec (GvAV (PL_defgv));
2041 GvAV (PL_defgv) = coro->invoke_av;
2042 coro->invoke_av = 0;
2043
2044 return 0;
2045 }
2046}
2047
2048static void
2049slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2050{
2051 HV *hv = (HV *)SvRV (coro_current);
2052 struct coro *coro = SvSTATE_hv ((SV *)hv);
2053
2054 if (expect_true (coro->saved_deffh))
2055 {
2056 /* subsequent iteration */
2057 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2058 coro->saved_deffh = 0;
2059
2060 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2061 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2062 {
2063 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2064 coro->invoke_av = newAV ();
2065
2066 frame->prepare = prepare_nop;
2067 }
2068 else
2069 {
2070 av_clear (GvAV (PL_defgv));
2071 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2072
2073 coro->prio = 0;
2074
2075 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2076 api_trace (aTHX_ coro_current, 0);
2077
2078 frame->prepare = prepare_schedule;
2079 av_push (av_async_pool, SvREFCNT_inc (hv));
2080 }
2081 }
2082 else
2083 {
2084 /* first iteration, simply fall through */
2085 frame->prepare = prepare_nop;
2086 }
2087
2088 frame->check = slf_check_pool_handler;
2089 frame->data = (void *)coro;
2090}
2091
2092/*****************************************************************************/
2093/* rouse callback */
2094
2095#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2096
2097static void
2098coro_rouse_callback (pTHX_ CV *cv)
2099{
2100 dXSARGS;
2101 SV *data = (SV *)S_GENSUB_ARG;
2102
2103 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2104 {
2105 /* first call, set args */
2106 SV *coro = SvRV (data);
2107 AV *av = newAV ();
2108
2109 SvRV_set (data, (SV *)av);
2110
2111 /* better take a full copy of the arguments */
2112 while (items--)
2113 av_store (av, items, newSVsv (ST (items)));
2114
2115 api_ready (aTHX_ coro);
2116 SvREFCNT_dec (coro);
2117 }
2118
2119 XSRETURN_EMPTY;
2120}
2121
2122static int
2123slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2124{
2125 SV *data = (SV *)frame->data;
2126
2127 if (CORO_THROW)
2128 return 0;
2129
2130 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2131 return 1;
2132
2133 /* now push all results on the stack */
2134 {
2135 dSP;
2136 AV *av = (AV *)SvRV (data);
2137 int i;
2138
2139 EXTEND (SP, AvFILLp (av) + 1);
2140 for (i = 0; i <= AvFILLp (av); ++i)
2141 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2142
2143 /* we have stolen the elements, so set length to zero and free */
2144 AvFILLp (av) = -1;
2145 av_undef (av);
2146
2147 PUTBACK;
2148 }
2149
2150 return 0;
2151}
2152
2153static void
2154slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2155{
2156 SV *cb;
2157
2158 if (items)
2159 cb = arg [0];
2160 else
2161 {
2162 struct coro *coro = SvSTATE_current;
2163
2164 if (!coro->rouse_cb)
2165 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2166
2167 cb = sv_2mortal (coro->rouse_cb);
2168 coro->rouse_cb = 0;
2169 }
2170
2171 if (!SvROK (cb)
2172 || SvTYPE (SvRV (cb)) != SVt_PVCV
2173 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2174 croak ("Coro::rouse_wait called with illegal callback argument,");
2175
2176 {
2177 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2178 SV *data = (SV *)S_GENSUB_ARG;
2179
2180 frame->data = (void *)data;
2181 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2182 frame->check = slf_check_rouse_wait;
2183 }
883} 2184}
884 2185
885static SV * 2186static SV *
886coro_deq (pTHX_ int min_prio) 2187coro_new_rouse_cb (pTHX)
887{ 2188{
888 int prio = PRIO_MAX - PRIO_MIN; 2189 HV *hv = (HV *)SvRV (coro_current);
2190 struct coro *coro = SvSTATE_hv (hv);
2191 SV *data = newRV_inc ((SV *)hv);
2192 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
889 2193
890 min_prio -= PRIO_MIN; 2194 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
891 if (min_prio < 0) 2195 SvREFCNT_dec (data); /* magicext increases the refcount */
892 min_prio = 0;
893 2196
894 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2197 SvREFCNT_dec (coro->rouse_cb);
895 if (av_len (coro_ready[prio]) >= 0) 2198 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2199
2200 return cb;
2201}
2202
2203/*****************************************************************************/
2204/* schedule-like-function opcode (SLF) */
2205
2206static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2207static const CV *slf_cv;
2208static SV **slf_argv;
2209static int slf_argc, slf_arga; /* count, allocated */
2210static I32 slf_ax; /* top of stack, for restore */
2211
2212/* this restores the stack in the case we patched the entersub, to */
2213/* recreate the stack frame as perl will on following calls */
2214/* since entersub cleared the stack */
2215static OP *
2216pp_restore (pTHX)
2217{
2218 int i;
2219 SV **SP = PL_stack_base + slf_ax;
2220
2221 PUSHMARK (SP);
2222
2223 EXTEND (SP, slf_argc + 1);
2224
2225 for (i = 0; i < slf_argc; ++i)
2226 PUSHs (sv_2mortal (slf_argv [i]));
2227
2228 PUSHs ((SV *)CvGV (slf_cv));
2229
2230 RETURNOP (slf_restore.op_first);
2231}
2232
2233static void
2234slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2235{
2236 SV **arg = (SV **)slf_frame.data;
2237
2238 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2239}
2240
2241static void
2242slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2243{
2244 if (items != 2)
2245 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2246
2247 frame->prepare = slf_prepare_transfer;
2248 frame->check = slf_check_nop;
2249 frame->data = (void *)arg; /* let's hope it will stay valid */
2250}
2251
2252static void
2253slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2254{
2255 frame->prepare = prepare_schedule;
2256 frame->check = slf_check_nop;
2257}
2258
2259static void
2260slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2261{
2262 struct coro *next = (struct coro *)slf_frame.data;
2263
2264 SvREFCNT_inc_NN (next->hv);
2265 prepare_schedule_to (aTHX_ ta, next);
2266}
2267
2268static void
2269slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2270{
2271 if (!items)
2272 croak ("Coro::schedule_to expects a coroutine argument, caught");
2273
2274 frame->data = (void *)SvSTATE (arg [0]);
2275 frame->prepare = slf_prepare_schedule_to;
2276 frame->check = slf_check_nop;
2277}
2278
2279static void
2280slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2281{
2282 api_ready (aTHX_ SvRV (coro_current));
2283
2284 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2285}
2286
2287static void
2288slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2289{
2290 frame->prepare = prepare_cede;
2291 frame->check = slf_check_nop;
2292}
2293
2294static void
2295slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2296{
2297 frame->prepare = prepare_cede_notself;
2298 frame->check = slf_check_nop;
2299}
2300
2301/*
2302 * these not obviously related functions are all rolled into one
2303 * function to increase chances that they all will call transfer with the same
2304 * stack offset
2305 * SLF stands for "schedule-like-function".
2306 */
2307static OP *
2308pp_slf (pTHX)
2309{
2310 I32 checkmark; /* mark SP to see how many elements check has pushed */
2311
2312 /* set up the slf frame, unless it has already been set-up */
2313 /* the latter happens when a new coro has been started */
2314 /* or when a new cctx was attached to an existing coroutine */
2315 if (expect_true (!slf_frame.prepare))
2316 {
2317 /* first iteration */
2318 dSP;
2319 SV **arg = PL_stack_base + TOPMARK + 1;
2320 int items = SP - arg; /* args without function object */
2321 SV *gv = *sp;
2322
2323 /* do a quick consistency check on the "function" object, and if it isn't */
2324 /* for us, divert to the real entersub */
2325 if (SvTYPE (gv) != SVt_PVGV
2326 || !GvCV (gv)
2327 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2328 return PL_ppaddr[OP_ENTERSUB](aTHX);
2329
2330 if (!(PL_op->op_flags & OPf_STACKED))
896 { 2331 {
897 coro_nready--; 2332 /* ampersand-form of call, use @_ instead of stack */
898 return av_shift (coro_ready[prio]); 2333 AV *av = GvAV (PL_defgv);
2334 arg = AvARRAY (av);
2335 items = AvFILLp (av) + 1;
899 } 2336 }
2337
2338 /* now call the init function, which needs to set up slf_frame */
2339 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2340 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2341
2342 /* pop args */
2343 SP = PL_stack_base + POPMARK;
2344
2345 PUTBACK;
2346 }
2347
2348 /* now that we have a slf_frame, interpret it! */
2349 /* we use a callback system not to make the code needlessly */
2350 /* complicated, but so we can run multiple perl coros from one cctx */
2351
2352 do
2353 {
2354 struct coro_transfer_args ta;
2355
2356 slf_frame.prepare (aTHX_ &ta);
2357 TRANSFER (ta, 0);
2358
2359 checkmark = PL_stack_sp - PL_stack_base;
2360 }
2361 while (slf_frame.check (aTHX_ &slf_frame));
2362
2363 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2364
2365 /* exception handling */
2366 if (expect_false (CORO_THROW))
2367 {
2368 SV *exception = sv_2mortal (CORO_THROW);
2369
2370 CORO_THROW = 0;
2371 sv_setsv (ERRSV, exception);
2372 croak (0);
2373 }
2374
2375 /* return value handling - mostly like entersub */
2376 /* make sure we put something on the stack in scalar context */
2377 if (GIMME_V == G_SCALAR)
2378 {
2379 dSP;
2380 SV **bot = PL_stack_base + checkmark;
2381
2382 if (sp == bot) /* too few, push undef */
2383 bot [1] = &PL_sv_undef;
2384 else if (sp != bot + 1) /* too many, take last one */
2385 bot [1] = *sp;
2386
2387 SP = bot + 1;
2388
2389 PUTBACK;
2390 }
2391
2392 return NORMAL;
2393}
2394
2395static void
2396api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2397{
2398 int i;
2399 SV **arg = PL_stack_base + ax;
2400 int items = PL_stack_sp - arg + 1;
2401
2402 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2403
2404 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2405 && PL_op->op_ppaddr != pp_slf)
2406 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2407
2408 CvFLAGS (cv) |= CVf_SLF;
2409 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2410 slf_cv = cv;
2411
2412 /* we patch the op, and then re-run the whole call */
2413 /* we have to put the same argument on the stack for this to work */
2414 /* and this will be done by pp_restore */
2415 slf_restore.op_next = (OP *)&slf_restore;
2416 slf_restore.op_type = OP_CUSTOM;
2417 slf_restore.op_ppaddr = pp_restore;
2418 slf_restore.op_first = PL_op;
2419
2420 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2421
2422 if (PL_op->op_flags & OPf_STACKED)
2423 {
2424 if (items > slf_arga)
2425 {
2426 slf_arga = items;
2427 Safefree (slf_argv);
2428 New (0, slf_argv, slf_arga, SV *);
2429 }
2430
2431 slf_argc = items;
2432
2433 for (i = 0; i < items; ++i)
2434 slf_argv [i] = SvREFCNT_inc (arg [i]);
2435 }
2436 else
2437 slf_argc = 0;
2438
2439 PL_op->op_ppaddr = pp_slf;
2440 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2441
2442 PL_op = (OP *)&slf_restore;
2443}
2444
2445/*****************************************************************************/
2446/* dynamic wind */
2447
2448static void
2449on_enterleave_call (pTHX_ SV *cb)
2450{
2451 dSP;
2452
2453 PUSHSTACK;
2454
2455 PUSHMARK (SP);
2456 PUTBACK;
2457 call_sv (cb, G_VOID | G_DISCARD);
2458 SPAGAIN;
2459
2460 POPSTACK;
2461}
2462
2463static SV *
2464coro_avp_pop_and_free (pTHX_ AV **avp)
2465{
2466 AV *av = *avp;
2467 SV *res = av_pop (av);
2468
2469 if (AvFILLp (av) < 0)
2470 {
2471 *avp = 0;
2472 SvREFCNT_dec (av);
2473 }
2474
2475 return res;
2476}
2477
2478static void
2479coro_pop_on_enter (pTHX_ void *coro)
2480{
2481 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2482 SvREFCNT_dec (cb);
2483}
2484
2485static void
2486coro_pop_on_leave (pTHX_ void *coro)
2487{
2488 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2489 on_enterleave_call (aTHX_ sv_2mortal (cb));
2490}
2491
2492/*****************************************************************************/
2493/* PerlIO::cede */
2494
2495typedef struct
2496{
2497 PerlIOBuf base;
2498 NV next, every;
2499} PerlIOCede;
2500
2501static IV
2502PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2503{
2504 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2505
2506 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2507 self->next = nvtime () + self->every;
2508
2509 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2510}
2511
2512static SV *
2513PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2514{
2515 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2516
2517 return newSVnv (self->every);
2518}
2519
2520static IV
2521PerlIOCede_flush (pTHX_ PerlIO *f)
2522{
2523 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2524 double now = nvtime ();
2525
2526 if (now >= self->next)
2527 {
2528 api_cede (aTHX);
2529 self->next = now + self->every;
2530 }
2531
2532 return PerlIOBuf_flush (aTHX_ f);
2533}
2534
2535static PerlIO_funcs PerlIO_cede =
2536{
2537 sizeof(PerlIO_funcs),
2538 "cede",
2539 sizeof(PerlIOCede),
2540 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2541 PerlIOCede_pushed,
2542 PerlIOBuf_popped,
2543 PerlIOBuf_open,
2544 PerlIOBase_binmode,
2545 PerlIOCede_getarg,
2546 PerlIOBase_fileno,
2547 PerlIOBuf_dup,
2548 PerlIOBuf_read,
2549 PerlIOBuf_unread,
2550 PerlIOBuf_write,
2551 PerlIOBuf_seek,
2552 PerlIOBuf_tell,
2553 PerlIOBuf_close,
2554 PerlIOCede_flush,
2555 PerlIOBuf_fill,
2556 PerlIOBase_eof,
2557 PerlIOBase_error,
2558 PerlIOBase_clearerr,
2559 PerlIOBase_setlinebuf,
2560 PerlIOBuf_get_base,
2561 PerlIOBuf_bufsiz,
2562 PerlIOBuf_get_ptr,
2563 PerlIOBuf_get_cnt,
2564 PerlIOBuf_set_ptrcnt,
2565};
2566
2567/*****************************************************************************/
2568/* Coro::Semaphore & Coro::Signal */
2569
2570static SV *
2571coro_waitarray_new (pTHX_ int count)
2572{
2573 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2574 AV *av = newAV ();
2575 SV **ary;
2576
2577 /* unfortunately, building manually saves memory */
2578 Newx (ary, 2, SV *);
2579 AvALLOC (av) = ary;
2580#if PERL_VERSION_ATLEAST (5,10,0)
2581 AvARRAY (av) = ary;
2582#else
2583 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2584 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2585 SvPVX ((SV *)av) = (char *)ary;
2586#endif
2587 AvMAX (av) = 1;
2588 AvFILLp (av) = 0;
2589 ary [0] = newSViv (count);
2590
2591 return newRV_noinc ((SV *)av);
2592}
2593
2594/* semaphore */
2595
2596static void
2597coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2598{
2599 SV *count_sv = AvARRAY (av)[0];
2600 IV count = SvIVX (count_sv);
2601
2602 count += adjust;
2603 SvIVX (count_sv) = count;
2604
2605 /* now wake up as many waiters as are expected to lock */
2606 while (count > 0 && AvFILLp (av) > 0)
2607 {
2608 SV *cb;
2609
2610 /* swap first two elements so we can shift a waiter */
2611 AvARRAY (av)[0] = AvARRAY (av)[1];
2612 AvARRAY (av)[1] = count_sv;
2613 cb = av_shift (av);
2614
2615 if (SvOBJECT (cb))
2616 {
2617 api_ready (aTHX_ cb);
2618 --count;
2619 }
2620 else if (SvTYPE (cb) == SVt_PVCV)
2621 {
2622 dSP;
2623 PUSHMARK (SP);
2624 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2625 PUTBACK;
2626 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2627 }
2628
2629 SvREFCNT_dec (cb);
2630 }
2631}
2632
2633static void
2634coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2635{
2636 /* call $sem->adjust (0) to possibly wake up some other waiters */
2637 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2638}
2639
2640static int
2641slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2642{
2643 AV *av = (AV *)frame->data;
2644 SV *count_sv = AvARRAY (av)[0];
2645
2646 /* if we are about to throw, don't actually acquire the lock, just throw */
2647 if (CORO_THROW)
2648 return 0;
2649 else if (SvIVX (count_sv) > 0)
2650 {
2651 SvSTATE_current->on_destroy = 0;
2652
2653 if (acquire)
2654 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2655 else
2656 coro_semaphore_adjust (aTHX_ av, 0);
2657
2658 return 0;
2659 }
2660 else
2661 {
2662 int i;
2663 /* if we were woken up but can't down, we look through the whole */
2664 /* waiters list and only add us if we aren't in there already */
2665 /* this avoids some degenerate memory usage cases */
2666
2667 for (i = 1; i <= AvFILLp (av); ++i)
2668 if (AvARRAY (av)[i] == SvRV (coro_current))
2669 return 1;
2670
2671 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2672 return 1;
2673 }
2674}
2675
2676static int
2677slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2678{
2679 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2680}
2681
2682static int
2683slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2684{
2685 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2686}
2687
2688static void
2689slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2690{
2691 AV *av = (AV *)SvRV (arg [0]);
2692
2693 if (SvIVX (AvARRAY (av)[0]) > 0)
2694 {
2695 frame->data = (void *)av;
2696 frame->prepare = prepare_nop;
2697 }
2698 else
2699 {
2700 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2701
2702 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2703 frame->prepare = prepare_schedule;
2704
2705 /* to avoid race conditions when a woken-up coro gets terminated */
2706 /* we arrange for a temporary on_destroy that calls adjust (0) */
2707 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2708 }
2709}
2710
2711static void
2712slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2713{
2714 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2715 frame->check = slf_check_semaphore_down;
2716}
2717
2718static void
2719slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2720{
2721 if (items >= 2)
2722 {
2723 /* callback form */
2724 AV *av = (AV *)SvRV (arg [0]);
2725 SV *cb_cv = s_get_cv_croak (arg [1]);
2726
2727 av_push (av, SvREFCNT_inc_NN (cb_cv));
2728
2729 if (SvIVX (AvARRAY (av)[0]) > 0)
2730 coro_semaphore_adjust (aTHX_ av, 0);
2731
2732 frame->prepare = prepare_nop;
2733 frame->check = slf_check_nop;
2734 }
2735 else
2736 {
2737 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2738 frame->check = slf_check_semaphore_wait;
2739 }
2740}
2741
2742/* signal */
2743
2744static void
2745coro_signal_wake (pTHX_ AV *av, int count)
2746{
2747 SvIVX (AvARRAY (av)[0]) = 0;
2748
2749 /* now signal count waiters */
2750 while (count > 0 && AvFILLp (av) > 0)
2751 {
2752 SV *cb;
2753
2754 /* swap first two elements so we can shift a waiter */
2755 cb = AvARRAY (av)[0];
2756 AvARRAY (av)[0] = AvARRAY (av)[1];
2757 AvARRAY (av)[1] = cb;
2758
2759 cb = av_shift (av);
2760
2761 if (SvTYPE (cb) == SVt_PVCV)
2762 {
2763 dSP;
2764 PUSHMARK (SP);
2765 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2766 PUTBACK;
2767 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2768 }
2769 else
2770 {
2771 api_ready (aTHX_ cb);
2772 sv_setiv (cb, 0); /* signal waiter */
2773 }
2774
2775 SvREFCNT_dec (cb);
2776
2777 --count;
2778 }
2779}
2780
2781static int
2782slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2783{
2784 /* if we are about to throw, also stop waiting */
2785 return SvROK ((SV *)frame->data) && !CORO_THROW;
2786}
2787
2788static void
2789slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2790{
2791 AV *av = (AV *)SvRV (arg [0]);
2792
2793 if (items >= 2)
2794 {
2795 SV *cb_cv = s_get_cv_croak (arg [1]);
2796 av_push (av, SvREFCNT_inc_NN (cb_cv));
2797
2798 if (SvIVX (AvARRAY (av)[0]))
2799 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2800
2801 frame->prepare = prepare_nop;
2802 frame->check = slf_check_nop;
2803 }
2804 else if (SvIVX (AvARRAY (av)[0]))
2805 {
2806 SvIVX (AvARRAY (av)[0]) = 0;
2807 frame->prepare = prepare_nop;
2808 frame->check = slf_check_nop;
2809 }
2810 else
2811 {
2812 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2813
2814 av_push (av, waiter);
2815
2816 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2817 frame->prepare = prepare_schedule;
2818 frame->check = slf_check_signal_wait;
2819 }
2820}
2821
2822/*****************************************************************************/
2823/* Coro::AIO */
2824
2825#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2826
2827/* helper storage struct */
2828struct io_state
2829{
2830 int errorno;
2831 I32 laststype; /* U16 in 5.10.0 */
2832 int laststatval;
2833 Stat_t statcache;
2834};
2835
2836static void
2837coro_aio_callback (pTHX_ CV *cv)
2838{
2839 dXSARGS;
2840 AV *state = (AV *)S_GENSUB_ARG;
2841 SV *coro = av_pop (state);
2842 SV *data_sv = newSV (sizeof (struct io_state));
2843
2844 av_extend (state, items - 1);
2845
2846 sv_upgrade (data_sv, SVt_PV);
2847 SvCUR_set (data_sv, sizeof (struct io_state));
2848 SvPOK_only (data_sv);
2849
2850 {
2851 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2852
2853 data->errorno = errno;
2854 data->laststype = PL_laststype;
2855 data->laststatval = PL_laststatval;
2856 data->statcache = PL_statcache;
2857 }
2858
2859 /* now build the result vector out of all the parameters and the data_sv */
2860 {
2861 int i;
2862
2863 for (i = 0; i < items; ++i)
2864 av_push (state, SvREFCNT_inc_NN (ST (i)));
2865 }
2866
2867 av_push (state, data_sv);
2868
2869 api_ready (aTHX_ coro);
2870 SvREFCNT_dec (coro);
2871 SvREFCNT_dec ((AV *)state);
2872}
2873
2874static int
2875slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2876{
2877 AV *state = (AV *)frame->data;
2878
2879 /* if we are about to throw, return early */
2880 /* this does not cancel the aio request, but at least */
2881 /* it quickly returns */
2882 if (CORO_THROW)
2883 return 0;
2884
2885 /* one element that is an RV? repeat! */
2886 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2887 return 1;
2888
2889 /* restore status */
2890 {
2891 SV *data_sv = av_pop (state);
2892 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2893
2894 errno = data->errorno;
2895 PL_laststype = data->laststype;
2896 PL_laststatval = data->laststatval;
2897 PL_statcache = data->statcache;
2898
2899 SvREFCNT_dec (data_sv);
2900 }
2901
2902 /* push result values */
2903 {
2904 dSP;
2905 int i;
2906
2907 EXTEND (SP, AvFILLp (state) + 1);
2908 for (i = 0; i <= AvFILLp (state); ++i)
2909 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2910
2911 PUTBACK;
2912 }
900 2913
901 return 0; 2914 return 0;
902} 2915}
903 2916
904static void 2917static void
905api_ready (SV *coro) 2918slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
906{ 2919{
907 dTHX; 2920 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
908
909 if (SvROK (coro))
910 coro = SvRV (coro);
911
912 LOCK;
913 coro_enq (aTHX_ SvREFCNT_inc (coro));
914 UNLOCK;
915}
916
917static void
918api_schedule (void)
919{
920 dTHX;
921
922 SV *prev, *next;
923
924 LOCK;
925
926 prev = SvRV (GvSV (coro_current)); 2921 SV *coro_hv = SvRV (coro_current);
927 next = coro_deq (aTHX_ PRIO_MIN); 2922 struct coro *coro = SvSTATE_hv (coro_hv);
928 2923
929 if (!next) 2924 /* put our coroutine id on the state arg */
930 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 2925 av_push (state, SvREFCNT_inc_NN (coro_hv));
931 2926
932 /* free this only after the transfer */ 2927 /* first see whether we have a non-zero priority and set it as AIO prio */
933 coro_mortal = prev; 2928 if (coro->prio)
934 SV_CORO (prev, "Coro::schedule"); 2929 {
2930 dSP;
935 2931
936 SvRV (GvSV (coro_current)) = next; 2932 static SV *prio_cv;
2933 static SV *prio_sv;
937 2934
938 SV_CORO (next, "Coro::schedule"); 2935 if (expect_false (!prio_cv))
2936 {
2937 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2938 prio_sv = newSViv (0);
2939 }
939 2940
940 UNLOCK; 2941 PUSHMARK (SP);
2942 sv_setiv (prio_sv, coro->prio);
2943 XPUSHs (prio_sv);
941 2944
942 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 2945 PUTBACK;
943 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2946 call_sv (prio_cv, G_VOID | G_DISCARD);
944} 2947 }
945 2948
946static void 2949 /* now call the original request */
947api_cede (void) 2950 {
948{ 2951 dSP;
949 dTHX; 2952 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2953 int i;
950 2954
951 LOCK; 2955 PUSHMARK (SP);
952 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
953 UNLOCK;
954 2956
955 api_schedule (); 2957 /* first push all args to the stack */
956} 2958 EXTEND (SP, items + 1);
957 2959
2960 for (i = 0; i < items; ++i)
2961 PUSHs (arg [i]);
2962
2963 /* now push the callback closure */
2964 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2965
2966 /* now call the AIO function - we assume our request is uncancelable */
2967 PUTBACK;
2968 call_sv ((SV *)req, G_VOID | G_DISCARD);
2969 }
2970
2971 /* now that the requets is going, we loop toll we have a result */
2972 frame->data = (void *)state;
2973 frame->prepare = prepare_schedule;
2974 frame->check = slf_check_aio_req;
2975}
2976
2977static void
2978coro_aio_req_xs (pTHX_ CV *cv)
2979{
2980 dXSARGS;
2981
2982 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2983
2984 XSRETURN_EMPTY;
2985}
2986
2987/*****************************************************************************/
2988
2989#if CORO_CLONE
2990# include "clone.c"
2991#endif
2992
2993/*****************************************************************************/
2994
2995static SV *
2996coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2997{
2998 SV *coro_sv;
2999 struct coro *coro;
3000 MAGIC *mg;
3001 HV *hv;
3002 SV *cb;
3003 int i;
3004
3005 if (argc > 0)
3006 {
3007 cb = s_get_cv_croak (argv [0]);
3008
3009 if (!is_coro)
3010 {
3011 if (CvISXSUB (cb))
3012 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3013
3014 if (!CvROOT (cb))
3015 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3016 }
3017 }
3018
3019 Newz (0, coro, 1, struct coro);
3020 coro->args = newAV ();
3021 coro->flags = CF_NEW;
3022
3023 if (coro_first) coro_first->prev = coro;
3024 coro->next = coro_first;
3025 coro_first = coro;
3026
3027 coro->hv = hv = newHV ();
3028 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3029 mg->mg_flags |= MGf_DUP;
3030 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3031
3032 if (argc > 0)
3033 {
3034 av_extend (coro->args, argc + is_coro - 1);
3035
3036 if (is_coro)
3037 {
3038 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3039 cb = (SV *)cv_coro_run;
3040 }
3041
3042 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3043
3044 for (i = 1; i < argc; i++)
3045 av_push (coro->args, newSVsv (argv [i]));
3046 }
3047
3048 return coro_sv;
3049}
3050
958MODULE = Coro::State PACKAGE = Coro::State 3051MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
959 3052
960PROTOTYPES: ENABLE 3053PROTOTYPES: DISABLE
961 3054
962BOOT: 3055BOOT:
963{ /* {} necessary for stoopid perl-5.6.x */ 3056{
964#ifdef USE_ITHREADS 3057#ifdef USE_ITHREADS
965 MUTEX_INIT (&coro_mutex); 3058# if CORO_PTHREAD
3059 coro_thx = PERL_GET_CONTEXT;
3060# endif
966#endif 3061#endif
3062 BOOT_PAGESIZE;
967 3063
968 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3064 cctx_current = cctx_new_empty ();
969 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3065
3066 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3067 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3068
3069 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3070 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3071 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3072
3073 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3074 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3075 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3076
970 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3077 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
971 3078
972 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3079 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
973 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3080 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
974 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3081 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
975 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3082 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
976 3083
977 main_mainstack = PL_mainstack; 3084 main_mainstack = PL_mainstack;
3085 main_top_env = PL_top_env;
978 3086
3087 while (main_top_env->je_prev)
3088 main_top_env = main_top_env->je_prev;
3089
3090 {
3091 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3092
3093 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3094 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3095
3096 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3097 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3098 }
3099
979 coroapi.ver = CORO_API_VERSION; 3100 coroapi.ver = CORO_API_VERSION;
3101 coroapi.rev = CORO_API_REVISION;
3102
980 coroapi.transfer = api_transfer; 3103 coroapi.transfer = api_transfer;
981}
982 3104
983Coro::State 3105 coroapi.sv_state = SvSTATE_;
984_newprocess(args) 3106 coroapi.execute_slf = api_execute_slf;
985 SV * args 3107 coroapi.prepare_nop = prepare_nop;
986 PROTOTYPE: $ 3108 coroapi.prepare_schedule = prepare_schedule;
3109 coroapi.prepare_cede = prepare_cede;
3110 coroapi.prepare_cede_notself = prepare_cede_notself;
3111
3112 {
3113 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3114
3115 if (!svp) croak ("Time::HiRes is required");
3116 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3117
3118 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3119
3120 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3121 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3122 }
3123
3124 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3125}
3126
3127SV *
3128new (SV *klass, ...)
3129 ALIAS:
3130 Coro::new = 1
987 CODE: 3131 CODE:
988 Coro__State coro; 3132 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
989 3133 OUTPUT:
990 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
991 croak ("Coro::State::_newprocess expects an arrayref");
992
993 Newz (0, coro, 1, struct coro);
994
995 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
996 /*coro->mainstack = 0; *//*actual work is done inside transfer */
997 /*coro->stack = 0;*/
998
999 /* same as JMPENV_BOOTSTRAP */
1000 /* we might be able to recycle start_env, but safe is safe */
1001 /*Zero(&coro->start_env, 1, JMPENV);*/
1002 coro->start_env.je_ret = -1;
1003 coro->start_env.je_mustcatch = TRUE;
1004
1005 RETVAL = coro;
1006 OUTPUT:
1007 RETVAL 3134 RETVAL
1008 3135
1009void 3136void
1010transfer(prev, next, flags) 3137transfer (...)
1011 SV *prev
1012 SV *next
1013 int flags
1014 PROTOTYPE: @ 3138 PROTOTYPE: $$
1015 CODE: 3139 CODE:
1016 PUTBACK; 3140 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1017 SV_CORO (next, "Coro::transfer"); 3141
1018 SV_CORO (prev, "Coro::transfer"); 3142bool
1019 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3143_destroy (SV *coro_sv)
1020 SPAGAIN; 3144 CODE:
3145 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3146 OUTPUT:
3147 RETVAL
1021 3148
1022void 3149void
1023DESTROY(coro)
1024 Coro::State coro
1025 CODE:
1026
1027 if (coro->mainstack && coro->mainstack != main_mainstack)
1028 {
1029 struct coro temp;
1030
1031 PUTBACK;
1032 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1033 LOAD (aTHX_ coro);
1034 SPAGAIN;
1035
1036 destroy_stacks (aTHX);
1037
1038 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1039 SPAGAIN;
1040
1041 coro->mainstack = 0;
1042 }
1043
1044 deallocate_stack (coro);
1045 SvREFCNT_dec (coro->args);
1046 Safefree (coro);
1047
1048void
1049_exit(code) 3150_exit (int code)
1050 int code
1051 PROTOTYPE: $ 3151 PROTOTYPE: $
1052 CODE: 3152 CODE:
1053 _exit (code); 3153 _exit (code);
1054 3154
1055MODULE = Coro::State PACKAGE = Coro::Cont 3155SV *
3156clone (Coro::State coro)
3157 CODE:
3158{
3159#if CORO_CLONE
3160 struct coro *ncoro = coro_clone (aTHX_ coro);
3161 MAGIC *mg;
3162 /* TODO: too much duplication */
3163 ncoro->hv = newHV ();
3164 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3165 mg->mg_flags |= MGf_DUP;
3166 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3167#else
3168 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3169#endif
3170}
3171 OUTPUT:
3172 RETVAL
1056 3173
1057# this is slightly dirty (should expose a c-level api) 3174int
3175cctx_stacksize (int new_stacksize = 0)
3176 PROTOTYPE: ;$
3177 CODE:
3178 RETVAL = cctx_stacksize;
3179 if (new_stacksize)
3180 {
3181 cctx_stacksize = new_stacksize;
3182 ++cctx_gen;
3183 }
3184 OUTPUT:
3185 RETVAL
3186
3187int
3188cctx_max_idle (int max_idle = 0)
3189 PROTOTYPE: ;$
3190 CODE:
3191 RETVAL = cctx_max_idle;
3192 if (max_idle > 1)
3193 cctx_max_idle = max_idle;
3194 OUTPUT:
3195 RETVAL
3196
3197int
3198cctx_count ()
3199 PROTOTYPE:
3200 CODE:
3201 RETVAL = cctx_count;
3202 OUTPUT:
3203 RETVAL
3204
3205int
3206cctx_idle ()
3207 PROTOTYPE:
3208 CODE:
3209 RETVAL = cctx_idle;
3210 OUTPUT:
3211 RETVAL
1058 3212
1059void 3213void
1060yield(...) 3214list ()
1061 PROTOTYPE: @ 3215 PROTOTYPE:
3216 PPCODE:
3217{
3218 struct coro *coro;
3219 for (coro = coro_first; coro; coro = coro->next)
3220 if (coro->hv)
3221 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3222}
3223
3224void
3225call (Coro::State coro, SV *coderef)
3226 ALIAS:
3227 eval = 1
3228 CODE:
3229{
3230 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3231 {
3232 struct coro *current = SvSTATE_current;
3233
3234 if (current != coro)
3235 {
3236 PUTBACK;
3237 save_perl (aTHX_ current);
3238 load_perl (aTHX_ coro);
3239 SPAGAIN;
3240 }
3241
3242 PUSHSTACK;
3243
3244 PUSHMARK (SP);
3245 PUTBACK;
3246
3247 if (ix)
3248 eval_sv (coderef, 0);
3249 else
3250 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3251
3252 POPSTACK;
3253 SPAGAIN;
3254
3255 if (current != coro)
3256 {
3257 PUTBACK;
3258 save_perl (aTHX_ coro);
3259 load_perl (aTHX_ current);
3260 SPAGAIN;
3261 }
3262 }
3263}
3264
3265SV *
3266is_ready (Coro::State coro)
3267 PROTOTYPE: $
3268 ALIAS:
3269 is_ready = CF_READY
3270 is_running = CF_RUNNING
3271 is_new = CF_NEW
3272 is_destroyed = CF_DESTROYED
3273 is_suspended = CF_SUSPENDED
3274 CODE:
3275 RETVAL = boolSV (coro->flags & ix);
3276 OUTPUT:
3277 RETVAL
3278
3279void
3280throw (Coro::State self, SV *exception = &PL_sv_undef)
3281 PROTOTYPE: $;$
1062 CODE: 3282 CODE:
1063 SV *yieldstack; 3283{
1064 SV *sv; 3284 struct coro *current = SvSTATE_current;
1065 AV *defav = GvAV (PL_defgv); 3285 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
1066 struct coro *prev, *next;
1067
1068 yieldstack = *hv_fetch (
1069 (HV *)SvRV (GvSV (coro_current)),
1070 "yieldstack", sizeof ("yieldstack") - 1,
1071 0
1072 );
1073
1074 /* set up @_ -- ugly */
1075 av_clear (defav);
1076 av_fill (defav, items - 1);
1077 while (items--)
1078 av_store (defav, items, SvREFCNT_inc (ST(items)));
1079
1080 sv = av_pop ((AV *)SvRV (yieldstack));
1081 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1082 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1083 SvREFCNT_dec (sv); 3286 SvREFCNT_dec (*exceptionp);
1084 3287 SvGETMAGIC (exception);
1085 transfer (aTHX_ prev, next, 0); 3288 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
1086
1087MODULE = Coro::State PACKAGE = Coro
1088
1089# this is slightly dirty (should expose a c-level api)
1090
1091BOOT:
1092{
1093 int i;
1094 HV *stash = gv_stashpv ("Coro", TRUE);
1095
1096 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1097 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1098 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1099 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1100 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1101 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1102
1103 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1104 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1105
1106 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1107 coro_ready[i] = newAV ();
1108
1109 {
1110 SV *sv = perl_get_sv("Coro::API", 1);
1111
1112 coroapi.schedule = api_schedule;
1113 coroapi.cede = api_cede;
1114 coroapi.ready = api_ready;
1115 coroapi.nready = &coro_nready;
1116 coroapi.current = coro_current;
1117
1118 GCoroAPI = &coroapi;
1119 sv_setiv(sv, (IV)&coroapi);
1120 SvREADONLY_on(sv);
1121 }
1122} 3289}
1123
1124#if !PERL_MICRO
1125 3290
1126void 3291void
1127ready(self) 3292api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1128 SV * self 3293 PROTOTYPE: $;$
3294 C_ARGS: aTHX_ coro, flags
3295
3296SV *
3297has_cctx (Coro::State coro)
1129 PROTOTYPE: $ 3298 PROTOTYPE: $
1130 CODE: 3299 CODE:
1131 api_ready (self); 3300 /* maybe manage the running flag differently */
1132 3301 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1133#endif 3302 OUTPUT:
3303 RETVAL
1134 3304
1135int 3305int
3306is_traced (Coro::State coro)
3307 PROTOTYPE: $
3308 CODE:
3309 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3310 OUTPUT:
3311 RETVAL
3312
3313UV
3314rss (Coro::State coro)
3315 PROTOTYPE: $
3316 ALIAS:
3317 usecount = 1
3318 CODE:
3319 switch (ix)
3320 {
3321 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3322 case 1: RETVAL = coro->usecount; break;
3323 }
3324 OUTPUT:
3325 RETVAL
3326
3327void
3328force_cctx ()
3329 PROTOTYPE:
3330 CODE:
3331 cctx_current->idle_sp = 0;
3332
3333void
3334swap_defsv (Coro::State self)
3335 PROTOTYPE: $
3336 ALIAS:
3337 swap_defav = 1
3338 CODE:
3339 if (!self->slot)
3340 croak ("cannot swap state with coroutine that has no saved state,");
3341 else
3342 {
3343 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3344 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3345
3346 SV *tmp = *src; *src = *dst; *dst = tmp;
3347 }
3348
3349void
3350cancel (Coro::State self)
3351 CODE:
3352 coro_state_destroy (aTHX_ self);
3353 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3354
3355
3356SV *
3357enable_times (int enabled = enable_times)
3358 CODE:
3359{
3360 RETVAL = boolSV (enable_times);
3361
3362 if (enabled != enable_times)
3363 {
3364 enable_times = enabled;
3365
3366 coro_times_update ();
3367 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3368 }
3369}
3370 OUTPUT:
3371 RETVAL
3372
3373void
3374times (Coro::State self)
3375 PPCODE:
3376{
3377 struct coro *current = SvSTATE (coro_current);
3378
3379 if (expect_false (current == self))
3380 {
3381 coro_times_update ();
3382 coro_times_add (SvSTATE (coro_current));
3383 }
3384
3385 EXTEND (SP, 2);
3386 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3387 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3388
3389 if (expect_false (current == self))
3390 coro_times_sub (SvSTATE (coro_current));
3391}
3392
3393void
3394swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3395 CODE:
3396{
3397 struct coro *current = SvSTATE_current;
3398
3399 if (current == coro)
3400 SWAP_SVS (current);
3401
3402 if (!coro->swap_sv)
3403 coro->swap_sv = newAV ();
3404
3405 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3406 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3407
3408 if (current == coro)
3409 SWAP_SVS (current);
3410}
3411
3412
3413MODULE = Coro::State PACKAGE = Coro
3414
3415BOOT:
3416{
3417 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3418 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3419 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3420 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3421 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3422 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3423 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3424 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3425 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3426
3427 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3428 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3429 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3430 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3431
3432 coro_stash = gv_stashpv ("Coro", TRUE);
3433
3434 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3435 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3436 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3437 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3438 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3439 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3440
3441 {
3442 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3443
3444 coroapi.schedule = api_schedule;
3445 coroapi.schedule_to = api_schedule_to;
3446 coroapi.cede = api_cede;
3447 coroapi.cede_notself = api_cede_notself;
3448 coroapi.ready = api_ready;
3449 coroapi.is_ready = api_is_ready;
3450 coroapi.nready = coro_nready;
3451 coroapi.current = coro_current;
3452
3453 /*GCoroAPI = &coroapi;*/
3454 sv_setiv (sv, (IV)&coroapi);
3455 SvREADONLY_on (sv);
3456 }
3457}
3458
3459SV *
3460async (...)
3461 PROTOTYPE: &@
3462 CODE:
3463 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3464 api_ready (aTHX_ RETVAL);
3465 OUTPUT:
3466 RETVAL
3467
3468void
3469terminate (...)
3470 CODE:
3471 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3472
3473void
3474schedule (...)
3475 CODE:
3476 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3477
3478void
3479schedule_to (...)
3480 CODE:
3481 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3482
3483void
3484cede_to (...)
3485 CODE:
3486 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3487
3488void
3489cede (...)
3490 CODE:
3491 CORO_EXECUTE_SLF_XS (slf_init_cede);
3492
3493void
3494cede_notself (...)
3495 CODE:
3496 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3497
3498void
3499_set_current (SV *current)
3500 PROTOTYPE: $
3501 CODE:
3502 SvREFCNT_dec (SvRV (coro_current));
3503 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3504
3505void
3506_set_readyhook (SV *hook)
3507 PROTOTYPE: $
3508 CODE:
3509 SvREFCNT_dec (coro_readyhook);
3510 SvGETMAGIC (hook);
3511 if (SvOK (hook))
3512 {
3513 coro_readyhook = newSVsv (hook);
3514 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3515 }
3516 else
3517 {
3518 coro_readyhook = 0;
3519 CORO_READYHOOK = 0;
3520 }
3521
3522int
3523prio (Coro::State coro, int newprio = 0)
3524 PROTOTYPE: $;$
3525 ALIAS:
3526 nice = 1
3527 CODE:
3528{
3529 RETVAL = coro->prio;
3530
3531 if (items > 1)
3532 {
3533 if (ix)
3534 newprio = coro->prio - newprio;
3535
3536 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3537 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3538
3539 coro->prio = newprio;
3540 }
3541}
3542 OUTPUT:
3543 RETVAL
3544
3545SV *
3546ready (SV *self)
3547 PROTOTYPE: $
3548 CODE:
3549 RETVAL = boolSV (api_ready (aTHX_ self));
3550 OUTPUT:
3551 RETVAL
3552
3553int
1136nready(...) 3554nready (...)
1137 PROTOTYPE: 3555 PROTOTYPE:
1138 CODE: 3556 CODE:
1139 RETVAL = coro_nready; 3557 RETVAL = coro_nready;
1140 OUTPUT: 3558 OUTPUT:
1141 RETVAL 3559 RETVAL
1142 3560
1143void 3561void
1144schedule(...) 3562suspend (Coro::State self)
1145 PROTOTYPE: 3563 PROTOTYPE: $
1146 CODE: 3564 CODE:
1147 api_schedule (); 3565 self->flags |= CF_SUSPENDED;
1148 3566
1149void 3567void
1150cede(...) 3568resume (Coro::State self)
1151 PROTOTYPE: 3569 PROTOTYPE: $
1152 CODE: 3570 CODE:
3571 self->flags &= ~CF_SUSPENDED;
3572
3573void
3574_pool_handler (...)
3575 CODE:
3576 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3577
3578void
3579async_pool (SV *cv, ...)
3580 PROTOTYPE: &@
3581 PPCODE:
3582{
3583 HV *hv = (HV *)av_pop (av_async_pool);
3584 AV *av = newAV ();
3585 SV *cb = ST (0);
3586 int i;
3587
3588 av_extend (av, items - 2);
3589 for (i = 1; i < items; ++i)
3590 av_push (av, SvREFCNT_inc_NN (ST (i)));
3591
3592 if ((SV *)hv == &PL_sv_undef)
3593 {
3594 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3595 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3596 SvREFCNT_dec (sv);
3597 }
3598
3599 {
3600 struct coro *coro = SvSTATE_hv (hv);
3601
3602 assert (!coro->invoke_cb);
3603 assert (!coro->invoke_av);
3604 coro->invoke_cb = SvREFCNT_inc (cb);
3605 coro->invoke_av = av;
3606 }
3607
3608 api_ready (aTHX_ (SV *)hv);
3609
3610 if (GIMME_V != G_VOID)
3611 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3612 else
3613 SvREFCNT_dec (hv);
3614}
3615
3616SV *
3617rouse_cb ()
3618 PROTOTYPE:
3619 CODE:
3620 RETVAL = coro_new_rouse_cb (aTHX);
3621 OUTPUT:
3622 RETVAL
3623
3624void
3625rouse_wait (...)
3626 PROTOTYPE: ;$
3627 PPCODE:
3628 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3629
3630void
3631on_enter (SV *block)
3632 ALIAS:
3633 on_leave = 1
3634 PROTOTYPE: &
3635 CODE:
3636{
3637 struct coro *coro = SvSTATE_current;
3638 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3639
3640 block = s_get_cv_croak (block);
3641
3642 if (!*avp)
3643 *avp = newAV ();
3644
3645 av_push (*avp, SvREFCNT_inc (block));
3646
3647 if (!ix)
3648 on_enterleave_call (aTHX_ block);
3649
3650 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3651 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3652 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3653}
3654
3655
3656MODULE = Coro::State PACKAGE = PerlIO::cede
3657
3658BOOT:
3659 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3660
3661
3662MODULE = Coro::State PACKAGE = Coro::Semaphore
3663
3664SV *
3665new (SV *klass, SV *count = 0)
3666 CODE:
3667{
3668 int semcnt = 1;
3669
3670 if (count)
3671 {
3672 SvGETMAGIC (count);
3673
3674 if (SvOK (count))
3675 semcnt = SvIV (count);
3676 }
3677
3678 RETVAL = sv_bless (
3679 coro_waitarray_new (aTHX_ semcnt),
3680 GvSTASH (CvGV (cv))
3681 );
3682}
3683 OUTPUT:
3684 RETVAL
3685
3686# helper for Coro::Channel and others
3687SV *
3688_alloc (int count)
3689 CODE:
3690 RETVAL = coro_waitarray_new (aTHX_ count);
3691 OUTPUT:
3692 RETVAL
3693
3694SV *
3695count (SV *self)
3696 CODE:
3697 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3698 OUTPUT:
3699 RETVAL
3700
3701void
3702up (SV *self, int adjust = 1)
3703 ALIAS:
3704 adjust = 1
3705 CODE:
3706 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3707
3708void
3709down (...)
3710 CODE:
3711 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3712
3713void
3714wait (...)
3715 CODE:
3716 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3717
3718void
3719try (SV *self)
3720 PPCODE:
3721{
3722 AV *av = (AV *)SvRV (self);
3723 SV *count_sv = AvARRAY (av)[0];
3724 IV count = SvIVX (count_sv);
3725
3726 if (count > 0)
3727 {
3728 --count;
3729 SvIVX (count_sv) = count;
3730 XSRETURN_YES;
3731 }
3732 else
3733 XSRETURN_NO;
3734}
3735
3736void
3737waiters (SV *self)
3738 PPCODE:
3739{
3740 AV *av = (AV *)SvRV (self);
3741 int wcount = AvFILLp (av) + 1 - 1;
3742
3743 if (GIMME_V == G_SCALAR)
3744 XPUSHs (sv_2mortal (newSViv (wcount)));
3745 else
3746 {
3747 int i;
3748 EXTEND (SP, wcount);
3749 for (i = 1; i <= wcount; ++i)
3750 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3751 }
3752}
3753
3754MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3755
3756void
3757_may_delete (SV *sem, int count, int extra_refs)
3758 PPCODE:
3759{
3760 AV *av = (AV *)SvRV (sem);
3761
3762 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3763 && AvFILLp (av) == 0 /* no waiters, just count */
3764 && SvIV (AvARRAY (av)[0]) == count)
3765 XSRETURN_YES;
3766
3767 XSRETURN_NO;
3768}
3769
3770MODULE = Coro::State PACKAGE = Coro::Signal
3771
3772SV *
3773new (SV *klass)
3774 CODE:
3775 RETVAL = sv_bless (
3776 coro_waitarray_new (aTHX_ 0),
3777 GvSTASH (CvGV (cv))
3778 );
3779 OUTPUT:
3780 RETVAL
3781
3782void
3783wait (...)
3784 CODE:
3785 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3786
3787void
3788broadcast (SV *self)
3789 CODE:
3790{
3791 AV *av = (AV *)SvRV (self);
3792 coro_signal_wake (aTHX_ av, AvFILLp (av));
3793}
3794
3795void
3796send (SV *self)
3797 CODE:
3798{
3799 AV *av = (AV *)SvRV (self);
3800
3801 if (AvFILLp (av))
3802 coro_signal_wake (aTHX_ av, 1);
3803 else
3804 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3805}
3806
3807IV
3808awaited (SV *self)
3809 CODE:
3810 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3811 OUTPUT:
3812 RETVAL
3813
3814
3815MODULE = Coro::State PACKAGE = Coro::AnyEvent
3816
3817BOOT:
3818 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3819
3820void
3821_schedule (...)
3822 CODE:
3823{
3824 static int incede;
3825
1153 api_cede (); 3826 api_cede_notself (aTHX);
1154 3827
3828 ++incede;
3829 while (coro_nready >= incede && api_cede (aTHX))
3830 ;
3831
3832 sv_setsv (sv_activity, &PL_sv_undef);
3833 if (coro_nready >= incede)
3834 {
3835 PUSHMARK (SP);
3836 PUTBACK;
3837 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3838 }
3839
3840 --incede;
3841}
3842
3843
3844MODULE = Coro::State PACKAGE = Coro::AIO
3845
3846void
3847_register (char *target, char *proto, SV *req)
3848 CODE:
3849{
3850 SV *req_cv = s_get_cv_croak (req);
3851 /* newXSproto doesn't return the CV on 5.8 */
3852 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3853 sv_setpv ((SV *)slf_cv, proto);
3854 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3855}
3856
3857MODULE = Coro::State PACKAGE = Coro::Select
3858
3859void
3860patch_pp_sselect ()
3861 CODE:
3862 if (!coro_old_pp_sselect)
3863 {
3864 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3865 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3866 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3867 }
3868
3869void
3870unpatch_pp_sselect ()
3871 CODE:
3872 if (coro_old_pp_sselect)
3873 {
3874 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3875 coro_old_pp_sselect = 0;
3876 }
3877
3878

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