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Comparing Coro/Coro/State.xs (file contents):
Revision 1.61 by root, Tue Aug 10 01:56:30 2004 UTC vs.
Revision 1.358 by root, Mon Jun 29 04:30:25 2009 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8 12
9#if PATCHLEVEL < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
10# ifndef PL_ppaddr 63# ifndef PL_ppaddr
11# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
12# endif 65# endif
13# ifndef call_sv 66# ifndef call_sv
14# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
25# ifndef IS_PADCONST 78# ifndef IS_PADCONST
26# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
27# endif 80# endif
28#endif 81#endif
29 82
30#include "libcoro/coro.c" 83/* 5.11 */
31 84#ifndef CxHASARGS
32#include <signal.h> 85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
33
34#ifdef HAVE_MMAP
35# include <unistd.h>
36# include <sys/mman.h>
37# ifndef MAP_ANONYMOUS
38# ifdef MAP_ANON
39# define MAP_ANONYMOUS MAP_ANON
40# else
41# undef HAVE_MMAP
42# endif 86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108#endif
109
110/* 5.8.7 */
111#ifndef SvRV_set
112# define SvRV_set(s,v) SvRV(s) = (v)
113#endif
114
115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
116# undef CORO_STACKGUARD
117#endif
118
119#ifndef CORO_STACKGUARD
120# define CORO_STACKGUARD 0
121#endif
122
123/* prefer perl internal functions over our own? */
124#ifndef CORO_PREFER_PERL_FUNCTIONS
125# define CORO_PREFER_PERL_FUNCTIONS 0
126#endif
127
128/* The next macros try to return the current stack pointer, in an as
129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
135# define STACKLEVEL ((void *)&stacklevel)
136#endif
137
138#define IN_DESTRUCT PL_dirty
139
140#if __GNUC__ >= 3
141# define attribute(x) __attribute__(x)
142# define expect(expr,value) __builtin_expect ((expr), (value))
143# define INLINE static inline
144#else
145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
152
153#define NOINLINE attribute ((noinline))
154
155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
157
158#ifdef USE_ITHREADS
159# if CORO_PTHREAD
160static void *coro_thx;
43# endif 161# endif
44#endif 162#endif
45 163
46#define SUB_INIT "Coro::State::initialize" 164#ifdef __linux
47#define UCORO_STATE "_coro_state" 165# include <time.h> /* for timespec */
48 166# include <syscall.h> /* for SYS_* */
49/* The next macro should declare a variable stacklevel that contains and approximation 167# ifdef SYS_clock_gettime
50 * to the current C stack pointer. Its property is that it changes with each call 168# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
51 * and should be unique. */ 169# define CORO_CLOCK_MONOTONIC 1
52#define dSTACKLEVEL void *stacklevel = &stacklevel 170# define CORO_CLOCK_THREAD_CPUTIME_ID 3
53
54#define IN_DESTRUCT (PL_main_cv == Nullcv)
55
56#define labs(l) ((l) >= 0 ? (l) : -(l))
57
58#include "CoroAPI.h"
59
60#ifdef USE_ITHREADS
61static perl_mutex coro_mutex;
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64#else
65# define LOCK 0
66# define UNLOCK 0
67#endif 171# endif
172#endif
68 173
174static double (*nvtime)(); /* so why doesn't it take void? */
175
176/* we hijack an hopefully unused CV flag for our purposes */
177#define CVf_SLF 0x4000
178static OP *pp_slf (pTHX);
179
180static U32 cctx_gen;
181static size_t cctx_stacksize = CORO_STACKSIZE;
69static struct CoroAPI coroapi; 182static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 183static AV *main_mainstack; /* used to differentiate between $main and others */
184static JMPENV *main_top_env;
71static HV *coro_state_stash; 185static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static SV *coro_mortal; /* will be freed after next transfer */ 186static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
75 187
76/* this is actually not only the c stack but also c registers etc... */ 188static AV *av_destroy; /* destruction queue */
189static SV *sv_manager; /* the manager coro */
190static SV *sv_idle; /* $Coro::idle */
191
192static GV *irsgv; /* $/ */
193static GV *stdoutgv; /* *STDOUT */
194static SV *rv_diehook;
195static SV *rv_warnhook;
196static HV *hv_sig; /* %SIG */
197
198/* async_pool helper stuff */
199static SV *sv_pool_rss;
200static SV *sv_pool_size;
201static SV *sv_async_pool_idle; /* description string */
202static AV *av_async_pool; /* idle pool */
203static SV *sv_Coro; /* class string */
204static CV *cv_pool_handler;
205static CV *cv_coro_state_new;
206
207/* Coro::AnyEvent */
208static SV *sv_activity;
209
210static struct coro_cctx *cctx_first;
211static int cctx_count, cctx_idle;
212
213enum {
214 CC_MAPPED = 0x01,
215 CC_NOREUSE = 0x02, /* throw this away after tracing */
216 CC_TRACE = 0x04,
217 CC_TRACE_SUB = 0x08, /* trace sub calls */
218 CC_TRACE_LINE = 0x10, /* trace each statement */
219 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
220};
221
222/* this is a structure representing a c-level coroutine */
77typedef struct { 223typedef struct coro_cctx
78 int refcnt; /* pointer reference counter */ 224{
79 int usecnt; /* shared by how many coroutines */ 225 struct coro_cctx *next;
80 int gencnt; /* generation counter */
81 226
227 /* the stack */
228 void *sptr;
229 size_t ssize;
230
231 /* cpu state */
232 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
233 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
234 JMPENV *top_env;
82 coro_context cctx; 235 coro_context cctx;
83 236
84 void *sptr; 237 U32 gen;
85 long ssize; /* positive == mmap, otherwise malloc */ 238#if CORO_USE_VALGRIND
86} coro_stack; 239 int valgrind_id;
240#endif
241 unsigned char flags;
242} coro_cctx;
87 243
244coro_cctx *cctx_current; /* the currently running cctx */
245
246/*****************************************************************************/
247
248enum {
249 CF_RUNNING = 0x0001, /* coroutine is running */
250 CF_READY = 0x0002, /* coroutine is ready */
251 CF_NEW = 0x0004, /* has never been switched to */
252 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
253 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
254};
255
256/* the structure where most of the perl state is stored, overlaid on the cxstack */
257typedef struct
258{
259 SV *defsv;
260 AV *defav;
261 SV *errsv;
262 SV *irsgv;
263 HV *hinthv;
264#define VAR(name,type) type name;
265# include "state.h"
266#undef VAR
267} perl_slots;
268
269#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
270
271/* this is a structure representing a perl-level coroutine */
88struct coro { 272struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 273 /* the C coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env; 274 coro_cctx *cctx;
91 275
92 /* the optional C context */ 276 /* ready queue */
93 coro_stack *stack; 277 struct coro *next_ready;
94 void *cursp;
95 int gencnt;
96 278
97 /* optionally saved, might be zero */ 279 /* state data */
98 AV *defav; 280 struct CoroSLF slf_frame; /* saved slf frame */
99 SV *defsv;
100 SV *errsv;
101
102 /* saved global state not related to stacks */
103 U8 dowarn;
104 I32 in_eval;
105
106 /* the stacks and related info (callchain etc..) */
107 PERL_SI *curstackinfo;
108 AV *curstack;
109 AV *mainstack; 281 AV *mainstack;
110 SV **stack_sp; 282 perl_slots *slot; /* basically the saved sp */
111 OP *op;
112 SV **curpad;
113 AV *comppad;
114 SV **stack_base;
115 SV **stack_max;
116 SV **tmps_stack;
117 I32 tmps_floor;
118 I32 tmps_ix;
119 I32 tmps_max;
120 I32 *markstack;
121 I32 *markstack_ptr;
122 I32 *markstack_max;
123 I32 *scopestack;
124 I32 scopestack_ix;
125 I32 scopestack_max;
126 ANY *savestack;
127 I32 savestack_ix;
128 I32 savestack_max;
129 OP **retstack;
130 I32 retstack_ix;
131 I32 retstack_max;
132 COP *curcop;
133 JMPENV *top_env;
134 283
284 CV *startcv; /* the CV to execute */
135 /* data associated with this coroutine (initial args) */ 285 AV *args; /* data associated with this coroutine (initial args) */
136 AV *args; 286 int refcnt; /* coroutines are refcounted, yes */
287 int flags; /* CF_ flags */
288 HV *hv; /* the perl hash associated with this coro, if any */
289 void (*on_destroy)(pTHX_ struct coro *coro);
290
291 /* statistics */
292 int usecount; /* number of transfers to this coro */
293
294 /* coro process data */
295 int prio;
296 SV *except; /* exception to be thrown */
297 SV *rouse_cb;
298
299 /* async_pool */
300 SV *saved_deffh;
301 SV *invoke_cb;
302 AV *invoke_av;
303
304 /* on_enter/on_leave */
305 AV *on_enter;
306 AV *on_leave;
307
308 /* linked list */
309 struct coro *next, *prev;
137}; 310};
138 311
139typedef struct coro *Coro__State; 312typedef struct coro *Coro__State;
140typedef struct coro *Coro__State_or_hashref; 313typedef struct coro *Coro__State_or_hashref;
141 314
142/* mostly copied from op.c:cv_clone2 */ 315/* the following variables are effectively part of the perl context */
143STATIC AV * 316/* and get copied between struct coro and these variables */
144clone_padlist (pTHX_ AV *protopadlist) 317/* the mainr easonw e don't support windows process emulation */
318static struct CoroSLF slf_frame; /* the current slf frame */
319
320/** Coro ********************************************************************/
321
322#define CORO_PRIO_MAX 3
323#define CORO_PRIO_HIGH 1
324#define CORO_PRIO_NORMAL 0
325#define CORO_PRIO_LOW -1
326#define CORO_PRIO_IDLE -3
327#define CORO_PRIO_MIN -4
328
329/* for Coro.pm */
330static SV *coro_current;
331static SV *coro_readyhook;
332static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
333static CV *cv_coro_run, *cv_coro_terminate;
334static struct coro *coro_first;
335#define coro_nready coroapi.nready
336
337/** lowlevel stuff **********************************************************/
338
339static SV *
340coro_get_sv (pTHX_ const char *name, int create)
145{ 341{
146 AV *av; 342#if PERL_VERSION_ATLEAST (5,10,0)
147 I32 ix; 343 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
148 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 344 get_sv (name, create);
149 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 345#endif
150 SV **pname = AvARRAY (protopad_name); 346 return get_sv (name, create);
151 SV **ppad = AvARRAY (protopad); 347}
152 I32 fname = AvFILLp (protopad_name); 348
153 I32 fpad = AvFILLp (protopad); 349static AV *
350coro_get_av (pTHX_ const char *name, int create)
351{
352#if PERL_VERSION_ATLEAST (5,10,0)
353 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
354 get_av (name, create);
355#endif
356 return get_av (name, create);
357}
358
359static HV *
360coro_get_hv (pTHX_ const char *name, int create)
361{
362#if PERL_VERSION_ATLEAST (5,10,0)
363 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
364 get_hv (name, create);
365#endif
366 return get_hv (name, create);
367}
368
369/* may croak */
370INLINE CV *
371coro_sv_2cv (pTHX_ SV *sv)
372{
373 HV *st;
374 GV *gvp;
375 CV *cv = sv_2cv (sv, &st, &gvp, 0);
376
377 if (!cv)
378 croak ("code reference expected");
379
380 return cv;
381}
382
383/*****************************************************************************/
384/* magic glue */
385
386#define CORO_MAGIC_type_cv 26
387#define CORO_MAGIC_type_state PERL_MAGIC_ext
388
389#define CORO_MAGIC_NN(sv, type) \
390 (expect_true (SvMAGIC (sv)->mg_type == type) \
391 ? SvMAGIC (sv) \
392 : mg_find (sv, type))
393
394#define CORO_MAGIC(sv, type) \
395 (expect_true (SvMAGIC (sv)) \
396 ? CORO_MAGIC_NN (sv, type) \
397 : 0)
398
399#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
400#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
401
402INLINE struct coro *
403SvSTATE_ (pTHX_ SV *coro)
404{
405 HV *stash;
406 MAGIC *mg;
407
408 if (SvROK (coro))
409 coro = SvRV (coro);
410
411 if (expect_false (SvTYPE (coro) != SVt_PVHV))
412 croak ("Coro::State object required");
413
414 stash = SvSTASH (coro);
415 if (expect_false (stash != coro_stash && stash != coro_state_stash))
416 {
417 /* very slow, but rare, check */
418 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
419 croak ("Coro::State object required");
420 }
421
422 mg = CORO_MAGIC_state (coro);
423 return (struct coro *)mg->mg_ptr;
424}
425
426#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
427
428/* faster than SvSTATE, but expects a coroutine hv */
429#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
430#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
431
432/*****************************************************************************/
433/* padlist management and caching */
434
435static AV *
436coro_derive_padlist (pTHX_ CV *cv)
437{
438 AV *padlist = CvPADLIST (cv);
154 AV *newpadlist, *newpad_name, *newpad; 439 AV *newpadlist, *newpad;
155 SV **npad;
156
157 newpad_name = newAV ();
158 for (ix = fname; ix >= 0; ix--)
159 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161 newpad = newAV ();
162 av_fill (newpad, AvFILLp (protopad));
163 npad = AvARRAY (newpad);
164 440
165 newpadlist = newAV (); 441 newpadlist = newAV ();
166 AvREAL_off (newpadlist); 442 AvREAL_off (newpadlist);
167 av_store (newpadlist, 0, (SV *) newpad_name); 443#if PERL_VERSION_ATLEAST (5,10,0)
444 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
445#else
446 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
447#endif
448 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
449 --AvFILLp (padlist);
450
451 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
168 av_store (newpadlist, 1, (SV *) newpad); 452 av_store (newpadlist, 1, (SV *)newpad);
169 453
170 av = newAV (); /* will be @_ */ 454 return newpadlist;
171 av_extend (av, 0); 455}
172 av_store (newpad, 0, (SV *) av);
173 AvFLAGS (av) = AVf_REIFY;
174 456
175 for (ix = fpad; ix > 0; ix--) 457static void
458free_padlist (pTHX_ AV *padlist)
459{
460 /* may be during global destruction */
461 if (!IN_DESTRUCT)
176 { 462 {
177 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 463 I32 i = AvFILLp (padlist);
178 464
179 if (namesv && namesv != &PL_sv_undef) 465 while (i > 0) /* special-case index 0 */
180 { 466 {
181 char *name = SvPVX (namesv); /* XXX */ 467 /* we try to be extra-careful here */
468 AV *av = (AV *)AvARRAY (padlist)[i--];
469 I32 j = AvFILLp (av);
182 470
183 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 471 while (j >= 0)
184 { /* lexical from outside? */ 472 SvREFCNT_dec (AvARRAY (av)[j--]);
185 npad[ix] = SvREFCNT_inc (ppad[ix]);
186 }
187 else
188 { /* our own lexical */
189 SV *sv;
190 if (*name == '&')
191 sv = SvREFCNT_inc (ppad[ix]);
192 else if (*name == '@')
193 sv = (SV *) newAV ();
194 else if (*name == '%')
195 sv = (SV *) newHV ();
196 else
197 sv = NEWSV (0, 0);
198 473
199#ifdef SvPADBUSY 474 AvFILLp (av) = -1;
200 if (!SvPADBUSY (sv)) 475 SvREFCNT_dec (av);
201#endif
202 SvPADMY_on (sv);
203
204 npad[ix] = sv;
205 }
206 } 476 }
207 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208 {
209 npad[ix] = SvREFCNT_inc (ppad[ix]);
210 }
211 else
212 {
213 SV *sv = NEWSV (0, 0);
214 SvPADTMP_on (sv);
215 npad[ix] = sv;
216 }
217 }
218 477
219#if 0 /* return -ENOTUNDERSTOOD */ 478 SvREFCNT_dec (AvARRAY (padlist)[0]);
220 /* Now that vars are all in place, clone nested closures. */
221 479
222 for (ix = fpad; ix > 0; ix--) {
223 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224 if (namesv
225 && namesv != &PL_sv_undef
226 && !(SvFLAGS(namesv) & SVf_FAKE)
227 && *SvPVX(namesv) == '&'
228 && CvCLONE(ppad[ix]))
229 {
230 CV *kid = cv_clone((CV*)ppad[ix]);
231 SvREFCNT_dec(ppad[ix]);
232 CvCLONE_on(kid);
233 SvPADMY_on(kid);
234 npad[ix] = (SV*)kid;
235 }
236 }
237#endif
238
239 return newpadlist;
240}
241
242STATIC void
243free_padlist (pTHX_ AV *padlist)
244{
245 /* may be during global destruction */
246 if (SvREFCNT (padlist))
247 {
248 I32 i = AvFILLp (padlist); 480 AvFILLp (padlist) = -1;
249 while (i >= 0)
250 {
251 SV **svp = av_fetch (padlist, i--, FALSE);
252 if (svp)
253 {
254 SV *sv;
255 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
256 SvREFCNT_dec (sv);
257
258 SvREFCNT_dec (*svp);
259 }
260 }
261
262 SvREFCNT_dec ((SV*)padlist); 481 SvREFCNT_dec ((SV*)padlist);
263 } 482 }
264} 483}
265 484
266STATIC int 485static int
267coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 486coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268{ 487{
269 AV *padlist; 488 AV *padlist;
270 AV *av = (AV *)mg->mg_obj; 489 AV *av = (AV *)mg->mg_obj;
490
491 /* perl manages to free our internal AV and _then_ call us */
492 if (IN_DESTRUCT)
493 return;
271 494
272 /* casting is fun. */ 495 /* casting is fun. */
273 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 496 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274 free_padlist (aTHX_ padlist); 497 free_padlist (aTHX_ padlist);
275 498
276 SvREFCNT_dec (av); 499 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
277}
278 500
279#define PERL_MAGIC_coro PERL_MAGIC_ext 501 return 0;
502}
280 503
281static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 504static MGVTBL coro_cv_vtbl = {
505 0, 0, 0, 0,
506 coro_cv_free
507};
282 508
283/* the next two functions merely cache the padlists */ 509/* the next two functions merely cache the padlists */
284STATIC void 510static void
285get_padlist (pTHX_ CV *cv) 511get_padlist (pTHX_ CV *cv)
286{ 512{
287 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 513 MAGIC *mg = CORO_MAGIC_cv (cv);
514 AV *av;
288 515
289 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 516 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
290 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 517 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291 else 518 else
519 {
520#if CORO_PREFER_PERL_FUNCTIONS
521 /* this is probably cleaner? but also slower! */
522 /* in practise, it seems to be less stable */
523 CV *cp = Perl_cv_clone (aTHX_ cv);
524 CvPADLIST (cv) = CvPADLIST (cp);
525 CvPADLIST (cp) = 0;
526 SvREFCNT_dec (cp);
527#else
292 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 528 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
529#endif
530 }
293} 531}
294 532
295STATIC void 533static void
296put_padlist (pTHX_ CV *cv) 534put_padlist (pTHX_ CV *cv)
297{ 535{
298 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 536 MAGIC *mg = CORO_MAGIC_cv (cv);
537 AV *av;
299 538
300 if (!mg) 539 if (expect_false (!mg))
301 { 540 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
302 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
303 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
304 mg->mg_virtual = &vtbl_coro;
305 mg->mg_obj = (SV *)newAV ();
306 }
307 541
308 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 542 av = (AV *)mg->mg_obj;
309}
310 543
311#define SB do { 544 if (expect_false (AvFILLp (av) >= AvMAX (av)))
312#define SE } while (0) 545 av_extend (av, AvFILLp (av) + 1);
313 546
314#define LOAD(state) load_state(aTHX_ (state)); 547 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
315#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 548}
316 549
317#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 550/** load & save, init *******************************************************/
318 551
319static void 552static void
553on_enterleave_call (pTHX_ SV *cb);
554
555static void
320load_state(pTHX_ Coro__State c) 556load_perl (pTHX_ Coro__State c)
321{ 557{
322 PL_dowarn = c->dowarn; 558 perl_slots *slot = c->slot;
323 PL_in_eval = c->in_eval; 559 c->slot = 0;
324 560
325 PL_curstackinfo = c->curstackinfo;
326 PL_curstack = c->curstack;
327 PL_mainstack = c->mainstack; 561 PL_mainstack = c->mainstack;
328 PL_stack_sp = c->stack_sp;
329 PL_op = c->op;
330 PL_curpad = c->curpad;
331 PL_comppad = c->comppad;
332 PL_stack_base = c->stack_base;
333 PL_stack_max = c->stack_max;
334 PL_tmps_stack = c->tmps_stack;
335 PL_tmps_floor = c->tmps_floor;
336 PL_tmps_ix = c->tmps_ix;
337 PL_tmps_max = c->tmps_max;
338 PL_markstack = c->markstack;
339 PL_markstack_ptr = c->markstack_ptr;
340 PL_markstack_max = c->markstack_max;
341 PL_scopestack = c->scopestack;
342 PL_scopestack_ix = c->scopestack_ix;
343 PL_scopestack_max = c->scopestack_max;
344 PL_savestack = c->savestack;
345 PL_savestack_ix = c->savestack_ix;
346 PL_savestack_max = c->savestack_max;
347 PL_retstack = c->retstack;
348 PL_retstack_ix = c->retstack_ix;
349 PL_retstack_max = c->retstack_max;
350 PL_curcop = c->curcop;
351 PL_top_env = c->top_env;
352 562
353 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 563 GvSV (PL_defgv) = slot->defsv;
354 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 564 GvAV (PL_defgv) = slot->defav;
355 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 565 GvSV (PL_errgv) = slot->errsv;
566 GvSV (irsgv) = slot->irsgv;
567 GvHV (PL_hintgv) = slot->hinthv;
568
569 #define VAR(name,type) PL_ ## name = slot->name;
570 # include "state.h"
571 #undef VAR
356 572
357 { 573 {
358 dSP; 574 dSP;
575
359 CV *cv; 576 CV *cv;
360 577
361 /* now do the ugly restore mess */ 578 /* now do the ugly restore mess */
362 while ((cv = (CV *)POPs)) 579 while (expect_true (cv = (CV *)POPs))
363 { 580 {
364 AV *padlist = (AV *)POPs;
365
366 if (padlist)
367 {
368 put_padlist (aTHX_ cv); /* mark this padlist as available */ 581 put_padlist (aTHX_ cv); /* mark this padlist as available */
369 CvPADLIST(cv) = padlist; 582 CvDEPTH (cv) = PTR2IV (POPs);
370 } 583 CvPADLIST (cv) = (AV *)POPs;
371
372 ++CvDEPTH(cv);
373 } 584 }
374 585
375 PUTBACK; 586 PUTBACK;
376 } 587 }
377}
378 588
589 slf_frame = c->slf_frame;
590 CORO_THROW = c->except;
591
592 if (expect_false (c->on_enter))
593 {
594 int i;
595
596 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
597 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
598 }
599}
600
379static void 601static void
380save_state(pTHX_ Coro__State c, int flags) 602save_perl (pTHX_ Coro__State c)
381{ 603{
604 if (expect_false (c->on_leave))
605 {
606 int i;
607
608 for (i = AvFILLp (c->on_leave); i >= 0; --i)
609 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
610 }
611
612 c->except = CORO_THROW;
613 c->slf_frame = slf_frame;
614
382 { 615 {
383 dSP; 616 dSP;
384 I32 cxix = cxstack_ix; 617 I32 cxix = cxstack_ix;
385 PERL_CONTEXT *ccstk = cxstack; 618 PERL_CONTEXT *ccstk = cxstack;
386 PERL_SI *top_si = PL_curstackinfo; 619 PERL_SI *top_si = PL_curstackinfo;
… …
388 /* 621 /*
389 * the worst thing you can imagine happens first - we have to save 622 * the worst thing you can imagine happens first - we have to save
390 * (and reinitialize) all cv's in the whole callchain :( 623 * (and reinitialize) all cv's in the whole callchain :(
391 */ 624 */
392 625
393 PUSHs (Nullsv); 626 XPUSHs (Nullsv);
394 /* this loop was inspired by pp_caller */ 627 /* this loop was inspired by pp_caller */
395 for (;;) 628 for (;;)
396 { 629 {
397 while (cxix >= 0) 630 while (expect_true (cxix >= 0))
398 { 631 {
399 PERL_CONTEXT *cx = &ccstk[cxix--]; 632 PERL_CONTEXT *cx = &ccstk[cxix--];
400 633
401 if (CxTYPE(cx) == CXt_SUB) 634 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
402 { 635 {
403 CV *cv = cx->blk_sub.cv; 636 CV *cv = cx->blk_sub.cv;
637
404 if (CvDEPTH(cv)) 638 if (expect_true (CvDEPTH (cv)))
405 { 639 {
406 EXTEND (SP, CvDEPTH(cv)*2); 640 EXTEND (SP, 3);
407
408 while (--CvDEPTH(cv))
409 {
410 /* this tells the restore code to increment CvDEPTH */
411 PUSHs (Nullsv);
412 PUSHs ((SV *)cv);
413 }
414
415 PUSHs ((SV *)CvPADLIST(cv)); 641 PUSHs ((SV *)CvPADLIST (cv));
642 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
416 PUSHs ((SV *)cv); 643 PUSHs ((SV *)cv);
417 644
645 CvDEPTH (cv) = 0;
418 get_padlist (aTHX_ cv); /* this is a monster */ 646 get_padlist (aTHX_ cv);
419 } 647 }
420 } 648 }
421#ifdef CXt_FORMAT
422 else if (CxTYPE(cx) == CXt_FORMAT)
423 {
424 /* I never used formats, so how should I know how these are implemented? */
425 /* my bold guess is as a simple, plain sub... */
426 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
427 }
428#endif
429 } 649 }
430 650
431 if (top_si->si_type == PERLSI_MAIN) 651 if (expect_true (top_si->si_type == PERLSI_MAIN))
432 break; 652 break;
433 653
434 top_si = top_si->si_prev; 654 top_si = top_si->si_prev;
435 ccstk = top_si->si_cxstack; 655 ccstk = top_si->si_cxstack;
436 cxix = top_si->si_cxix; 656 cxix = top_si->si_cxix;
437 } 657 }
438 658
439 PUTBACK; 659 PUTBACK;
440 } 660 }
441 661
442 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 662 /* allocate some space on the context stack for our purposes */
443 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 663 /* we manually unroll here, as usually 2 slots is enough */
444 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 664 if (SLOT_COUNT >= 1) CXINC;
665 if (SLOT_COUNT >= 2) CXINC;
666 if (SLOT_COUNT >= 3) CXINC;
667 {
668 int i;
669 for (i = 3; i < SLOT_COUNT; ++i)
670 CXINC;
671 }
672 cxstack_ix -= SLOT_COUNT; /* undo allocation */
445 673
446 c->dowarn = PL_dowarn;
447 c->in_eval = PL_in_eval;
448
449 c->curstackinfo = PL_curstackinfo;
450 c->curstack = PL_curstack;
451 c->mainstack = PL_mainstack; 674 c->mainstack = PL_mainstack;
452 c->stack_sp = PL_stack_sp; 675
453 c->op = PL_op; 676 {
454 c->curpad = PL_curpad; 677 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
455 c->comppad = PL_comppad; 678
456 c->stack_base = PL_stack_base; 679 slot->defav = GvAV (PL_defgv);
457 c->stack_max = PL_stack_max; 680 slot->defsv = DEFSV;
458 c->tmps_stack = PL_tmps_stack; 681 slot->errsv = ERRSV;
459 c->tmps_floor = PL_tmps_floor; 682 slot->irsgv = GvSV (irsgv);
460 c->tmps_ix = PL_tmps_ix; 683 slot->hinthv = GvHV (PL_hintgv);
461 c->tmps_max = PL_tmps_max; 684
462 c->markstack = PL_markstack; 685 #define VAR(name,type) slot->name = PL_ ## name;
463 c->markstack_ptr = PL_markstack_ptr; 686 # include "state.h"
464 c->markstack_max = PL_markstack_max; 687 #undef VAR
465 c->scopestack = PL_scopestack; 688 }
466 c->scopestack_ix = PL_scopestack_ix;
467 c->scopestack_max = PL_scopestack_max;
468 c->savestack = PL_savestack;
469 c->savestack_ix = PL_savestack_ix;
470 c->savestack_max = PL_savestack_max;
471 c->retstack = PL_retstack;
472 c->retstack_ix = PL_retstack_ix;
473 c->retstack_max = PL_retstack_max;
474 c->curcop = PL_curcop;
475 c->top_env = PL_top_env;
476} 689}
477 690
478/* 691/*
479 * allocate various perl stacks. This is an exact copy 692 * allocate various perl stacks. This is almost an exact copy
480 * of perl.c:init_stacks, except that it uses less memory 693 * of perl.c:init_stacks, except that it uses less memory
481 * on the (sometimes correct) assumption that coroutines do 694 * on the (sometimes correct) assumption that coroutines do
482 * not usually need a lot of stackspace. 695 * not usually need a lot of stackspace.
483 */ 696 */
484STATIC void 697#if CORO_PREFER_PERL_FUNCTIONS
698# define coro_init_stacks(thx) init_stacks ()
699#else
700static void
485coro_init_stacks (pTHX) 701coro_init_stacks (pTHX)
486{ 702{
487 LOCK; 703 PL_curstackinfo = new_stackinfo(32, 8);
488
489 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
490 PL_curstackinfo->si_type = PERLSI_MAIN; 704 PL_curstackinfo->si_type = PERLSI_MAIN;
491 PL_curstack = PL_curstackinfo->si_stack; 705 PL_curstack = PL_curstackinfo->si_stack;
492 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 706 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
493 707
494 PL_stack_base = AvARRAY(PL_curstack); 708 PL_stack_base = AvARRAY(PL_curstack);
495 PL_stack_sp = PL_stack_base; 709 PL_stack_sp = PL_stack_base;
496 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 710 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
497 711
498 New(50,PL_tmps_stack,96,SV*); 712 New(50,PL_tmps_stack,32,SV*);
499 PL_tmps_floor = -1; 713 PL_tmps_floor = -1;
500 PL_tmps_ix = -1; 714 PL_tmps_ix = -1;
501 PL_tmps_max = 96; 715 PL_tmps_max = 32;
502 716
503 New(54,PL_markstack,16,I32); 717 New(54,PL_markstack,16,I32);
504 PL_markstack_ptr = PL_markstack; 718 PL_markstack_ptr = PL_markstack;
505 PL_markstack_max = PL_markstack + 16; 719 PL_markstack_max = PL_markstack + 16;
506 720
507#ifdef SET_MARK_OFFSET 721#ifdef SET_MARK_OFFSET
508 SET_MARK_OFFSET; 722 SET_MARK_OFFSET;
509#endif 723#endif
510 724
511 New(54,PL_scopestack,16,I32); 725 New(54,PL_scopestack,8,I32);
512 PL_scopestack_ix = 0; 726 PL_scopestack_ix = 0;
513 PL_scopestack_max = 16; 727 PL_scopestack_max = 8;
514 728
515 New(54,PL_savestack,96,ANY); 729 New(54,PL_savestack,24,ANY);
516 PL_savestack_ix = 0; 730 PL_savestack_ix = 0;
517 PL_savestack_max = 96; 731 PL_savestack_max = 24;
518 732
733#if !PERL_VERSION_ATLEAST (5,10,0)
519 New(54,PL_retstack,8,OP*); 734 New(54,PL_retstack,4,OP*);
520 PL_retstack_ix = 0; 735 PL_retstack_ix = 0;
521 PL_retstack_max = 8; 736 PL_retstack_max = 4;
522 737#endif
523 UNLOCK;
524} 738}
739#endif
525 740
526/* 741/*
527 * destroy the stacks, the callchain etc... 742 * destroy the stacks, the callchain etc...
528 */ 743 */
529STATIC void 744static void
530destroy_stacks(pTHX) 745coro_destruct_stacks (pTHX)
531{ 746{
532 if (!IN_DESTRUCT)
533 {
534 /* is this ugly, I ask? */
535 LEAVE_SCOPE (0);
536
537 /* sure it is, but more important: is it correct?? :/ */
538 FREETMPS;
539
540 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
541 }
542
543 while (PL_curstackinfo->si_next) 747 while (PL_curstackinfo->si_next)
544 PL_curstackinfo = PL_curstackinfo->si_next; 748 PL_curstackinfo = PL_curstackinfo->si_next;
545 749
546 while (PL_curstackinfo) 750 while (PL_curstackinfo)
547 { 751 {
548 PERL_SI *p = PL_curstackinfo->si_prev; 752 PERL_SI *p = PL_curstackinfo->si_prev;
549 753
550 { /*D*//*remove*/
551 dSP;
552 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
553 PUTBACK; /* possibly superfluous */
554 }
555
556 if (!IN_DESTRUCT) 754 if (!IN_DESTRUCT)
557 {
558 dounwind (-1);/*D*//*remove*/
559 SvREFCNT_dec (PL_curstackinfo->si_stack); 755 SvREFCNT_dec (PL_curstackinfo->si_stack);
560 }
561 756
562 Safefree (PL_curstackinfo->si_cxstack); 757 Safefree (PL_curstackinfo->si_cxstack);
563 Safefree (PL_curstackinfo); 758 Safefree (PL_curstackinfo);
564 PL_curstackinfo = p; 759 PL_curstackinfo = p;
565 } 760 }
566 761
567 Safefree (PL_tmps_stack); 762 Safefree (PL_tmps_stack);
568 Safefree (PL_markstack); 763 Safefree (PL_markstack);
569 Safefree (PL_scopestack); 764 Safefree (PL_scopestack);
570 Safefree (PL_savestack); 765 Safefree (PL_savestack);
766#if !PERL_VERSION_ATLEAST (5,10,0)
571 Safefree (PL_retstack); 767 Safefree (PL_retstack);
572}
573
574static void
575allocate_stack (Coro__State ctx, int alloc)
576{
577 coro_stack *stack;
578
579 New (0, stack, 1, coro_stack);
580
581 stack->refcnt = 1;
582 stack->usecnt = 1;
583 stack->gencnt = ctx->gencnt = 0;
584
585 if (alloc)
586 {
587#if HAVE_MMAP
588 stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
589 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
590 if (stack->sptr == (void *)-1)
591#endif 768#endif
769}
770
771#define CORO_RSS \
772 rss += sizeof (SYM (curstackinfo)); \
773 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
774 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
775 rss += SYM (tmps_max) * sizeof (SV *); \
776 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
777 rss += SYM (scopestack_max) * sizeof (I32); \
778 rss += SYM (savestack_max) * sizeof (ANY);
779
780static size_t
781coro_rss (pTHX_ struct coro *coro)
782{
783 size_t rss = sizeof (*coro);
784
785 if (coro->mainstack)
786 {
787 if (coro->flags & CF_RUNNING)
592 { 788 {
593 /*FIXME*//*D*//* reasonable stack size! */ 789 #define SYM(sym) PL_ ## sym
594 stack->ssize = - (8192 * sizeof (long)); 790 CORO_RSS;
595 New (0, stack->sptr, 8192, long); 791 #undef SYM
596 } 792 }
597 }
598 else 793 else
599 stack->sptr = 0;
600
601 ctx->stack = stack;
602}
603
604static void
605deallocate_stack (Coro__State ctx)
606{
607 coro_stack *stack = ctx->stack;
608
609 ctx->stack = 0;
610
611 if (stack)
612 {
613 if (!--stack->refcnt)
614 { 794 {
615#ifdef HAVE_MMAP 795 #define SYM(sym) coro->slot->sym
616 if (stack->ssize > 0 && stack->sptr) 796 CORO_RSS;
617 munmap (stack->sptr, stack->ssize); 797 #undef SYM
618 else
619#endif
620 Safefree (stack->sptr);
621
622 Safefree (stack);
623 } 798 }
624 else if (ctx->gencnt == stack->gencnt) 799 }
625 --stack->usecnt; 800
801 return rss;
802}
803
804/** coroutine stack handling ************************************************/
805
806static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
807static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
808static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
809
810/* apparently < 5.8.8 */
811#ifndef MgPV_nolen_const
812#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
813 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
814 (const char*)(mg)->mg_ptr)
815#endif
816
817/*
818 * This overrides the default magic get method of %SIG elements.
819 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
820 * and instead of trying to save and restore the hash elements, we just provide
821 * readback here.
822 */
823static int
824coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
825{
826 const char *s = MgPV_nolen_const (mg);
827
828 if (*s == '_')
626 } 829 {
627} 830 SV **svp = 0;
628 831
832 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
833 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
834
835 if (svp)
836 {
837 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
838 return 0;
839 }
840 }
841
842 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
843}
844
629static void 845static int
630setup_coro (void *arg) 846coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
847{
848 const char *s = MgPV_nolen_const (mg);
849
850 if (*s == '_')
851 {
852 SV **svp = 0;
853
854 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
855 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
856
857 if (svp)
858 {
859 SV *old = *svp;
860 *svp = 0;
861 SvREFCNT_dec (old);
862 return 0;
863 }
864 }
865
866 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
867}
868
869static int
870coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
871{
872 const char *s = MgPV_nolen_const (mg);
873
874 if (*s == '_')
875 {
876 SV **svp = 0;
877
878 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
879 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
880
881 if (svp)
882 {
883 SV *old = *svp;
884 *svp = SvOK (sv) ? newSVsv (sv) : 0;
885 SvREFCNT_dec (old);
886 return 0;
887 }
888 }
889
890 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
891}
892
893static void
894prepare_nop (pTHX_ struct coro_transfer_args *ta)
895{
896 /* kind of mega-hacky, but works */
897 ta->next = ta->prev = (struct coro *)ta;
898}
899
900static int
901slf_check_nop (pTHX_ struct CoroSLF *frame)
902{
903 return 0;
904}
905
906static int
907slf_check_repeat (pTHX_ struct CoroSLF *frame)
908{
909 return 1;
910}
911
912static UNOP coro_setup_op;
913
914static void NOINLINE /* noinline to keep it out of the transfer fast path */
915coro_setup (pTHX_ struct coro *coro)
631{ 916{
632 /* 917 /*
633 * emulate part of the perl startup here. 918 * emulate part of the perl startup here.
634 */ 919 */
635 dTHX;
636 dSP;
637 Coro__State ctx = (Coro__State)arg;
638 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
639
640 coro_init_stacks (aTHX); 920 coro_init_stacks (aTHX);
641 /*PL_curcop = 0;*/ 921
642 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 922 PL_runops = RUNOPS_DEFAULT;
643 SvREFCNT_dec (GvAV (PL_defgv)); 923 PL_curcop = &PL_compiling;
924 PL_in_eval = EVAL_NULL;
925 PL_comppad = 0;
926 PL_comppad_name = 0;
927 PL_comppad_name_fill = 0;
928 PL_comppad_name_floor = 0;
929 PL_curpm = 0;
930 PL_curpad = 0;
931 PL_localizing = 0;
932 PL_dirty = 0;
933 PL_restartop = 0;
934#if PERL_VERSION_ATLEAST (5,10,0)
935 PL_parser = 0;
936#endif
937 PL_hints = 0;
938
939 /* recreate the die/warn hooks */
940 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
941 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
942
943 GvSV (PL_defgv) = newSV (0);
644 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 944 GvAV (PL_defgv) = coro->args; coro->args = 0;
945 GvSV (PL_errgv) = newSV (0);
946 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
947 GvHV (PL_hintgv) = 0;
948 PL_rs = newSVsv (GvSV (irsgv));
949 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
645 950
646 SPAGAIN; 951 {
952 dSP;
953 UNOP myop;
647 954
955 Zero (&myop, 1, UNOP);
956 myop.op_next = Nullop;
957 myop.op_type = OP_ENTERSUB;
958 myop.op_flags = OPf_WANT_VOID;
959
960 PUSHMARK (SP);
961 PUSHs ((SV *)coro->startcv);
962 PUTBACK;
963 PL_op = (OP *)&myop;
964 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
965 }
966
967 /* this newly created coroutine might be run on an existing cctx which most
968 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
969 */
970 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
971 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
972
973 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
974 coro_setup_op.op_next = PL_op;
975 coro_setup_op.op_type = OP_ENTERSUB;
976 coro_setup_op.op_ppaddr = pp_slf;
977 /* no flags etc. required, as an init function won't be called */
978
979 PL_op = (OP *)&coro_setup_op;
980
981 /* copy throw, in case it was set before coro_setup */
982 CORO_THROW = coro->except;
983}
984
985static void
986coro_unwind_stacks (pTHX)
987{
988 if (!IN_DESTRUCT)
989 {
990 /* restore all saved variables and stuff */
991 LEAVE_SCOPE (0);
992 assert (PL_tmps_floor == -1);
993
994 /* free all temporaries */
995 FREETMPS;
996 assert (PL_tmps_ix == -1);
997
998 /* unwind all extra stacks */
999 POPSTACK_TO (PL_mainstack);
1000
1001 /* unwind main stack */
1002 dounwind (-1);
1003 }
1004}
1005
1006static void
1007coro_destruct_perl (pTHX_ struct coro *coro)
1008{
1009 SV *svf [9];
1010
1011 {
1012 struct coro *current = SvSTATE_current;
1013
1014 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1015
1016 save_perl (aTHX_ current);
1017 load_perl (aTHX_ coro);
1018
1019 coro_unwind_stacks (aTHX);
1020 coro_destruct_stacks (aTHX);
1021
1022 // now save some sv's to be free'd later
1023 svf [0] = GvSV (PL_defgv);
1024 svf [1] = (SV *)GvAV (PL_defgv);
1025 svf [2] = GvSV (PL_errgv);
1026 svf [3] = (SV *)PL_defoutgv;
1027 svf [4] = PL_rs;
1028 svf [5] = GvSV (irsgv);
1029 svf [6] = (SV *)GvHV (PL_hintgv);
1030 svf [7] = PL_diehook;
1031 svf [8] = PL_warnhook;
1032 assert (9 == sizeof (svf) / sizeof (*svf));
1033
1034 load_perl (aTHX_ current);
1035 }
1036
1037 {
1038 int i;
1039
1040 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1041 SvREFCNT_dec (svf [i]);
1042
1043 SvREFCNT_dec (coro->saved_deffh);
1044 SvREFCNT_dec (coro->rouse_cb);
1045 SvREFCNT_dec (coro->invoke_cb);
1046 SvREFCNT_dec (coro->invoke_av);
1047 }
1048}
1049
1050INLINE void
1051free_coro_mortal (pTHX)
1052{
1053 if (expect_true (coro_mortal))
1054 {
1055 SvREFCNT_dec (coro_mortal);
1056 coro_mortal = 0;
1057 }
1058}
1059
1060static int
1061runops_trace (pTHX)
1062{
1063 COP *oldcop = 0;
1064 int oldcxix = -2;
1065
1066 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1067 {
1068 PERL_ASYNC_CHECK ();
1069
1070 if (cctx_current->flags & CC_TRACE_ALL)
1071 {
1072 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1073 {
1074 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1075 SV **bot, **top;
1076 AV *av = newAV (); /* return values */
1077 SV **cb;
1078 dSP;
1079
1080 GV *gv = CvGV (cx->blk_sub.cv);
1081 SV *fullname = sv_2mortal (newSV (0));
1082 if (isGV (gv))
1083 gv_efullname3 (fullname, gv, 0);
1084
1085 bot = PL_stack_base + cx->blk_oldsp + 1;
1086 top = cx->blk_gimme == G_ARRAY ? SP + 1
1087 : cx->blk_gimme == G_SCALAR ? bot + 1
1088 : bot;
1089
1090 av_extend (av, top - bot);
1091 while (bot < top)
1092 av_push (av, SvREFCNT_inc_NN (*bot++));
1093
1094 PL_runops = RUNOPS_DEFAULT;
1095 ENTER;
1096 SAVETMPS;
1097 EXTEND (SP, 3);
1098 PUSHMARK (SP);
1099 PUSHs (&PL_sv_no);
1100 PUSHs (fullname);
1101 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1102 PUTBACK;
1103 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1104 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1105 SPAGAIN;
1106 FREETMPS;
1107 LEAVE;
1108 PL_runops = runops_trace;
1109 }
1110
1111 if (oldcop != PL_curcop)
1112 {
1113 oldcop = PL_curcop;
1114
1115 if (PL_curcop != &PL_compiling)
1116 {
1117 SV **cb;
1118
1119 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1120 {
1121 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1122
1123 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1124 {
1125 dSP;
1126 GV *gv = CvGV (cx->blk_sub.cv);
1127 SV *fullname = sv_2mortal (newSV (0));
1128
1129 if (isGV (gv))
1130 gv_efullname3 (fullname, gv, 0);
1131
1132 PL_runops = RUNOPS_DEFAULT;
1133 ENTER;
1134 SAVETMPS;
1135 EXTEND (SP, 3);
1136 PUSHMARK (SP);
1137 PUSHs (&PL_sv_yes);
1138 PUSHs (fullname);
1139 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1140 PUTBACK;
1141 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1142 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1143 SPAGAIN;
1144 FREETMPS;
1145 LEAVE;
1146 PL_runops = runops_trace;
1147 }
1148
1149 oldcxix = cxstack_ix;
1150 }
1151
1152 if (cctx_current->flags & CC_TRACE_LINE)
1153 {
1154 dSP;
1155
1156 PL_runops = RUNOPS_DEFAULT;
1157 ENTER;
1158 SAVETMPS;
1159 EXTEND (SP, 3);
1160 PL_runops = RUNOPS_DEFAULT;
1161 PUSHMARK (SP);
1162 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1163 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1164 PUTBACK;
1165 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1166 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1167 SPAGAIN;
1168 FREETMPS;
1169 LEAVE;
1170 PL_runops = runops_trace;
1171 }
1172 }
1173 }
1174 }
1175 }
1176
1177 TAINT_NOT;
1178 return 0;
1179}
1180
1181static struct CoroSLF cctx_ssl_frame;
1182
1183static void
1184slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1185{
1186 ta->prev = 0;
1187}
1188
1189static int
1190slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1191{
1192 *frame = cctx_ssl_frame;
1193
1194 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1195}
1196
1197/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1198static void NOINLINE
1199cctx_prepare (pTHX)
1200{
1201 PL_top_env = &PL_start_env;
1202
1203 if (cctx_current->flags & CC_TRACE)
1204 PL_runops = runops_trace;
1205
1206 /* we already must be executing an SLF op, there is no other valid way
1207 * that can lead to creation of a new cctx */
1208 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1209 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1210
1211 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1212 cctx_ssl_frame = slf_frame;
1213
1214 slf_frame.prepare = slf_prepare_set_stacklevel;
1215 slf_frame.check = slf_check_set_stacklevel;
1216}
1217
1218/* the tail of transfer: execute stuff we can only do after a transfer */
1219INLINE void
1220transfer_tail (pTHX)
1221{
1222 free_coro_mortal (aTHX);
1223}
1224
1225/*
1226 * this is a _very_ stripped down perl interpreter ;)
1227 */
1228static void
1229cctx_run (void *arg)
1230{
1231#ifdef USE_ITHREADS
1232# if CORO_PTHREAD
1233 PERL_SET_CONTEXT (coro_thx);
1234# endif
1235#endif
1236 {
1237 dTHX;
1238
1239 /* normally we would need to skip the entersub here */
1240 /* not doing so will re-execute it, which is exactly what we want */
1241 /* PL_nop = PL_nop->op_next */
1242
1243 /* inject a fake subroutine call to cctx_init */
1244 cctx_prepare (aTHX);
1245
1246 /* cctx_run is the alternative tail of transfer() */
1247 transfer_tail (aTHX);
1248
1249 /* somebody or something will hit me for both perl_run and PL_restartop */
1250 PL_restartop = PL_op;
1251 perl_run (PL_curinterp);
1252 /*
1253 * Unfortunately, there is no way to get at the return values of the
1254 * coro body here, as perl_run destroys these
1255 */
1256
1257 /*
1258 * If perl-run returns we assume exit() was being called or the coro
1259 * fell off the end, which seems to be the only valid (non-bug)
1260 * reason for perl_run to return. We try to exit by jumping to the
1261 * bootstrap-time "top" top_env, as we cannot restore the "main"
1262 * coroutine as Coro has no such concept.
1263 * This actually isn't valid with the pthread backend, but OSes requiring
1264 * that backend are too broken to do it in a standards-compliant way.
1265 */
1266 PL_top_env = main_top_env;
1267 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1268 }
1269}
1270
1271static coro_cctx *
1272cctx_new ()
1273{
1274 coro_cctx *cctx;
1275
1276 ++cctx_count;
1277 New (0, cctx, 1, coro_cctx);
1278
1279 cctx->gen = cctx_gen;
1280 cctx->flags = 0;
1281 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1282
1283 return cctx;
1284}
1285
1286/* create a new cctx only suitable as source */
1287static coro_cctx *
1288cctx_new_empty ()
1289{
1290 coro_cctx *cctx = cctx_new ();
1291
1292 cctx->sptr = 0;
1293 coro_create (&cctx->cctx, 0, 0, 0, 0);
1294
1295 return cctx;
1296}
1297
1298/* create a new cctx suitable as destination/running a perl interpreter */
1299static coro_cctx *
1300cctx_new_run ()
1301{
1302 coro_cctx *cctx = cctx_new ();
1303 void *stack_start;
1304 size_t stack_size;
1305
1306#if HAVE_MMAP
1307 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1308 /* mmap supposedly does allocate-on-write for us */
1309 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1310
1311 if (cctx->sptr != (void *)-1)
1312 {
1313 #if CORO_STACKGUARD
1314 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1315 #endif
1316 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1317 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1318 cctx->flags |= CC_MAPPED;
1319 }
1320 else
1321#endif
1322 {
1323 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1324 New (0, cctx->sptr, cctx_stacksize, long);
1325
1326 if (!cctx->sptr)
1327 {
1328 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1329 _exit (EXIT_FAILURE);
1330 }
1331
1332 stack_start = cctx->sptr;
1333 stack_size = cctx->ssize;
1334 }
1335
1336 #if CORO_USE_VALGRIND
1337 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1338 #endif
1339
1340 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1341
1342 return cctx;
1343}
1344
1345static void
1346cctx_destroy (coro_cctx *cctx)
1347{
1348 if (!cctx)
1349 return;
1350
1351 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1352
1353 --cctx_count;
1354 coro_destroy (&cctx->cctx);
1355
1356 /* coro_transfer creates new, empty cctx's */
648 if (ctx->stack) 1357 if (cctx->sptr)
1358 {
1359 #if CORO_USE_VALGRIND
1360 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1361 #endif
1362
1363#if HAVE_MMAP
1364 if (cctx->flags & CC_MAPPED)
1365 munmap (cctx->sptr, cctx->ssize);
1366 else
1367#endif
1368 Safefree (cctx->sptr);
649 { 1369 }
650 ctx->cursp = 0;
651 1370
1371 Safefree (cctx);
1372}
1373
1374/* wether this cctx should be destructed */
1375#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1376
1377static coro_cctx *
1378cctx_get (pTHX)
1379{
1380 while (expect_true (cctx_first))
1381 {
1382 coro_cctx *cctx = cctx_first;
1383 cctx_first = cctx->next;
1384 --cctx_idle;
1385
1386 if (expect_true (!CCTX_EXPIRED (cctx)))
1387 return cctx;
1388
1389 cctx_destroy (cctx);
1390 }
1391
1392 return cctx_new_run ();
1393}
1394
1395static void
1396cctx_put (coro_cctx *cctx)
1397{
1398 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1399
1400 /* free another cctx if overlimit */
1401 if (expect_false (cctx_idle >= cctx_max_idle))
1402 {
1403 coro_cctx *first = cctx_first;
1404 cctx_first = first->next;
1405 --cctx_idle;
1406
1407 cctx_destroy (first);
1408 }
1409
1410 ++cctx_idle;
1411 cctx->next = cctx_first;
1412 cctx_first = cctx;
1413}
1414
1415/** coroutine switching *****************************************************/
1416
1417static void
1418transfer_check (pTHX_ struct coro *prev, struct coro *next)
1419{
1420 /* TODO: throwing up here is considered harmful */
1421
1422 if (expect_true (prev != next))
1423 {
1424 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1425 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1426
1427 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1428 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1429
1430#if !PERL_VERSION_ATLEAST (5,10,0)
1431 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1432 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1433#endif
1434 }
1435}
1436
1437/* always use the TRANSFER macro */
1438static void NOINLINE /* noinline so we have a fixed stackframe */
1439transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1440{
1441 dSTACKLEVEL;
1442
1443 /* sometimes transfer is only called to set idle_sp */
1444 if (expect_false (!prev))
1445 {
1446 cctx_current->idle_sp = STACKLEVEL;
1447 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1448 }
1449 else if (expect_true (prev != next))
1450 {
1451 coro_cctx *cctx_prev;
1452
1453 if (expect_false (prev->flags & CF_NEW))
1454 {
1455 /* create a new empty/source context */
1456 prev->flags &= ~CF_NEW;
1457 prev->flags |= CF_RUNNING;
1458 }
1459
1460 prev->flags &= ~CF_RUNNING;
1461 next->flags |= CF_RUNNING;
1462
1463 /* first get rid of the old state */
1464 save_perl (aTHX_ prev);
1465
1466 if (expect_false (next->flags & CF_NEW))
1467 {
1468 /* need to start coroutine */
1469 next->flags &= ~CF_NEW;
1470 /* setup coroutine call */
1471 coro_setup (aTHX_ next);
1472 }
1473 else
1474 load_perl (aTHX_ next);
1475
1476 /* possibly untie and reuse the cctx */
1477 if (expect_true (
1478 cctx_current->idle_sp == STACKLEVEL
1479 && !(cctx_current->flags & CC_TRACE)
1480 && !force_cctx
1481 ))
1482 {
1483 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1484 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1485
1486 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1487 /* without this the next cctx_get might destroy the running cctx while still in use */
1488 if (expect_false (CCTX_EXPIRED (cctx_current)))
1489 if (expect_true (!next->cctx))
1490 next->cctx = cctx_get (aTHX);
1491
1492 cctx_put (cctx_current);
1493 }
1494 else
1495 prev->cctx = cctx_current;
1496
1497 ++next->usecount;
1498
1499 cctx_prev = cctx_current;
1500 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1501
1502 next->cctx = 0;
1503
1504 if (expect_false (cctx_prev != cctx_current))
1505 {
1506 cctx_prev->top_env = PL_top_env;
1507 PL_top_env = cctx_current->top_env;
1508 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1509 }
1510
1511 transfer_tail (aTHX);
1512 }
1513}
1514
1515#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1516#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1517
1518/** high level stuff ********************************************************/
1519
1520static int
1521coro_state_destroy (pTHX_ struct coro *coro)
1522{
1523 if (coro->flags & CF_DESTROYED)
1524 return 0;
1525
1526 if (coro->on_destroy && !PL_dirty)
1527 coro->on_destroy (aTHX_ coro);
1528
1529 coro->flags |= CF_DESTROYED;
1530
1531 if (coro->flags & CF_READY)
1532 {
1533 /* reduce nready, as destroying a ready coro effectively unreadies it */
1534 /* alternative: look through all ready queues and remove the coro */
1535 --coro_nready;
1536 }
1537 else
1538 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1539
1540 if (coro->mainstack
1541 && coro->mainstack != main_mainstack
1542 && coro->slot
1543 && !PL_dirty)
1544 coro_destruct_perl (aTHX_ coro);
1545
1546 cctx_destroy (coro->cctx);
1547 SvREFCNT_dec (coro->startcv);
1548 SvREFCNT_dec (coro->args);
1549 SvREFCNT_dec (CORO_THROW);
1550
1551 if (coro->next) coro->next->prev = coro->prev;
1552 if (coro->prev) coro->prev->next = coro->next;
1553 if (coro == coro_first) coro_first = coro->next;
1554
1555 return 1;
1556}
1557
1558static int
1559coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1560{
1561 struct coro *coro = (struct coro *)mg->mg_ptr;
1562 mg->mg_ptr = 0;
1563
1564 coro->hv = 0;
1565
1566 if (--coro->refcnt < 0)
1567 {
1568 coro_state_destroy (aTHX_ coro);
1569 Safefree (coro);
1570 }
1571
1572 return 0;
1573}
1574
1575static int
1576coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1577{
1578 struct coro *coro = (struct coro *)mg->mg_ptr;
1579
1580 ++coro->refcnt;
1581
1582 return 0;
1583}
1584
1585static MGVTBL coro_state_vtbl = {
1586 0, 0, 0, 0,
1587 coro_state_free,
1588 0,
1589#ifdef MGf_DUP
1590 coro_state_dup,
1591#else
1592# define MGf_DUP 0
1593#endif
1594};
1595
1596static void
1597prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1598{
1599 ta->prev = SvSTATE (prev_sv);
1600 ta->next = SvSTATE (next_sv);
1601 TRANSFER_CHECK (*ta);
1602}
1603
1604static void
1605api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1606{
1607 struct coro_transfer_args ta;
1608
1609 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1610 TRANSFER (ta, 1);
1611}
1612
1613/*****************************************************************************/
1614/* gensub: simple closure generation utility */
1615
1616#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1617
1618/* create a closure from XS, returns a code reference */
1619/* the arg can be accessed via GENSUB_ARG from the callback */
1620/* the callback must use dXSARGS/XSRETURN */
1621static SV *
1622gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1623{
1624 CV *cv = (CV *)newSV (0);
1625
1626 sv_upgrade ((SV *)cv, SVt_PVCV);
1627
1628 CvANON_on (cv);
1629 CvISXSUB_on (cv);
1630 CvXSUB (cv) = xsub;
1631 GENSUB_ARG = arg;
1632
1633 return newRV_noinc ((SV *)cv);
1634}
1635
1636/** Coro ********************************************************************/
1637
1638INLINE void
1639coro_enq (pTHX_ struct coro *coro)
1640{
1641 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1642
1643 SvREFCNT_inc_NN (coro->hv);
1644
1645 coro->next_ready = 0;
1646 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1647 ready [1] = coro;
1648}
1649
1650INLINE struct coro *
1651coro_deq (pTHX)
1652{
1653 int prio;
1654
1655 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1656 {
1657 struct coro **ready = coro_ready [prio];
1658
1659 if (ready [0])
1660 {
1661 struct coro *coro = ready [0];
1662 ready [0] = coro->next_ready;
1663 return coro;
1664 }
1665 }
1666
1667 return 0;
1668}
1669
1670static int
1671api_ready (pTHX_ SV *coro_sv)
1672{
1673 struct coro *coro;
1674 SV *sv_hook;
1675 void (*xs_hook)(void);
1676
1677 coro = SvSTATE (coro_sv);
1678
1679 if (coro->flags & CF_READY)
1680 return 0;
1681
1682 coro->flags |= CF_READY;
1683
1684 sv_hook = coro_nready ? 0 : coro_readyhook;
1685 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1686
1687 coro_enq (aTHX_ coro);
1688 ++coro_nready;
1689
1690 if (sv_hook)
1691 {
1692 dSP;
1693
1694 ENTER;
1695 SAVETMPS;
1696
652 PUSHMARK(SP); 1697 PUSHMARK (SP);
653 PUTBACK; 1698 PUTBACK;
654 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1699 call_sv (sv_hook, G_VOID | G_DISCARD);
655 1700
656 if (SvTRUE (ERRSV)) 1701 FREETMPS;
657 croak (NULL); 1702 LEAVE;
658 else
659 croak ("FATAL: CCTXT coroutine returned!");
660 }
661 else
662 { 1703 }
663 UNOP myop;
664 1704
665 PL_op = (OP *)&myop; 1705 if (xs_hook)
1706 xs_hook ();
666 1707
667 Zero(&myop, 1, UNOP); 1708 return 1;
668 myop.op_next = Nullop; 1709}
669 myop.op_flags = OPf_WANT_VOID;
670 1710
671 PUSHMARK(SP); 1711static int
672 XPUSHs (sub_init); 1712api_is_ready (pTHX_ SV *coro_sv)
673 /* 1713{
674 * the next line is slightly wrong, as PL_op->op_next 1714 return !!(SvSTATE (coro_sv)->flags & CF_READY);
675 * is actually being executed so we skip the first op. 1715}
676 * that doesn't matter, though, since it is only
677 * pp_nextstate and we never return...
678 * ah yes, and I don't care anyways ;)
679 */
680 PUTBACK;
681 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
682 SPAGAIN;
683 1716
684 ENTER; /* necessary e.g. for dounwind */ 1717/* expects to own a reference to next->hv */
1718INLINE void
1719prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1720{
1721 SV *prev_sv = SvRV (coro_current);
1722
1723 ta->prev = SvSTATE_hv (prev_sv);
1724 ta->next = next;
1725
1726 TRANSFER_CHECK (*ta);
1727
1728 SvRV_set (coro_current, (SV *)next->hv);
1729
1730 free_coro_mortal (aTHX);
1731 coro_mortal = prev_sv;
1732}
1733
1734static void
1735prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1736{
1737 for (;;)
685 } 1738 {
686} 1739 struct coro *next = coro_deq (aTHX);
687 1740
688static void 1741 if (expect_true (next))
689continue_coro (void *arg)
690{
691 /*
692 * this is a _very_ stripped down perl interpreter ;)
693 */
694 dTHX;
695 Coro__State ctx = (Coro__State)arg;
696 JMPENV coro_start_env;
697
698 PL_top_env = &ctx->start_env;
699
700 ctx->cursp = 0;
701 PL_op = PL_op->op_next;
702 CALLRUNOPS(aTHX);
703
704 abort ();
705}
706
707STATIC void
708transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
709{
710 dSTACKLEVEL;
711
712 if (prev != next)
713 {
714 if (next->mainstack)
715 { 1742 {
716 LOCK; 1743 /* cannot transfer to destroyed coros, skip and look for next */
717 SAVE (prev, flags); 1744 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
718 LOAD (next); 1745 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
719 UNLOCK; 1746 else
720
721 /* mark this state as in-use */
722 next->mainstack = 0;
723 next->tmps_ix = -2;
724
725 /* stacklevel changed? if yes, grab the stack for us! */
726 if (flags & TRANSFER_SAVE_CCTXT)
727 { 1747 {
728 if (!prev->stack) 1748 next->flags &= ~CF_READY;
729 allocate_stack (prev, 0); 1749 --coro_nready;
730 else if (prev->cursp != stacklevel 1750
731 && prev->stack->usecnt > 1) 1751 prepare_schedule_to (aTHX_ ta, next);
732 { 1752 break;
733 prev->gencnt = ++prev->stack->gencnt;
734 prev->stack->usecnt = 1;
735 }
736
737 /* has our stack been invalidated? */
738 if (next->stack && next->stack->gencnt != next->gencnt)
739 {
740 deallocate_stack (next);
741 allocate_stack (next, 1);
742 coro_create (&(next->stack->cctx),
743 continue_coro, (void *)next,
744 next->stack->sptr, labs (next->stack->ssize));
745 }
746
747 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
748 prev->cursp = stacklevel;
749 /* don't add any code here */
750 } 1753 }
751 else
752 next->cursp = stacklevel;
753 } 1754 }
754 else if (next->tmps_ix == -2)
755 croak ("tried to transfer to running coroutine");
756 else 1755 else
757 { 1756 {
758 LOCK; 1757 /* nothing to schedule: call the idle handler */
759 SAVE (prev, -1); /* first get rid of the old state */ 1758 if (SvROK (sv_idle)
760 UNLOCK; 1759 && SvOBJECT (SvRV (sv_idle)))
761
762 if (flags & TRANSFER_SAVE_CCTXT)
763 { 1760 {
764 if (!prev->stack) 1761 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
765 allocate_stack (prev, 0); 1762 api_ready (aTHX_ SvRV (sv_idle));
766 1763 --coro_nready;
767 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
768 {
769 PL_top_env = &next->start_env;
770
771 setup_coro (next);
772 next->cursp = stacklevel;
773
774 prev->stack->refcnt++;
775 prev->stack->usecnt++;
776 next->stack = prev->stack;
777 next->gencnt = prev->gencnt;
778 }
779 else
780 {
781 assert (!next->stack);
782 allocate_stack (next, 1);
783 coro_create (&(next->stack->cctx),
784 setup_coro, (void *)next,
785 next->stack->sptr, labs (next->stack->ssize));
786 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
787 prev->cursp = stacklevel;
788 /* don't add any code here */
789 }
790 } 1764 }
791 else 1765 else
792 { 1766 {
793 setup_coro (next); 1767 dSP;
794 next->cursp = stacklevel; 1768
1769 ENTER;
1770 SAVETMPS;
1771
1772 PUSHMARK (SP);
1773 PUTBACK;
1774 call_sv (sv_idle, G_VOID | G_DISCARD);
1775
1776 FREETMPS;
1777 LEAVE;
795 } 1778 }
796 } 1779 }
797 } 1780 }
1781}
798 1782
799 LOCK; 1783INLINE void
1784prepare_cede (pTHX_ struct coro_transfer_args *ta)
1785{
1786 api_ready (aTHX_ coro_current);
1787 prepare_schedule (aTHX_ ta);
1788}
1789
1790INLINE void
1791prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1792{
1793 SV *prev = SvRV (coro_current);
1794
800 if (coro_mortal) 1795 if (coro_nready)
801 {
802 SvREFCNT_dec (coro_mortal);
803 coro_mortal = 0;
804 } 1796 {
805 UNLOCK; 1797 prepare_schedule (aTHX_ ta);
806} 1798 api_ready (aTHX_ prev);
807
808#define SV_CORO(sv,func) \
809 do { \
810 if (SvROK (sv)) \
811 sv = SvRV (sv); \
812 \
813 if (SvTYPE (sv) == SVt_PVHV) \
814 { \
815 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
816 \
817 if (!he) \
818 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
819 \
820 (sv) = SvRV (HeVAL(he)); \
821 } \
822 \
823 /* must also be changed inside Coro::Cont::yield */ \
824 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
825 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
826 \
827 } while(0)
828
829#define SvSTATE(sv) (struct coro *)SvIV (sv)
830
831static void
832api_transfer(pTHX_ SV *prev, SV *next, int flags)
833{
834 SV_CORO (prev, "Coro::transfer");
835 SV_CORO (next, "Coro::transfer");
836
837 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
838}
839
840/** Coro ********************************************************************/
841
842#define PRIO_MAX 3
843#define PRIO_HIGH 1
844#define PRIO_NORMAL 0
845#define PRIO_LOW -1
846#define PRIO_IDLE -3
847#define PRIO_MIN -4
848
849/* for Coro.pm */
850static GV *coro_current, *coro_idle;
851static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
852static int coro_nready;
853
854static void
855coro_enq (pTHX_ SV *sv)
856{
857 if (SvTYPE (sv) == SVt_PVHV)
858 { 1799 }
859 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1800 else
860 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1801 prepare_nop (aTHX_ ta);
1802}
861 1803
862 prio = prio > PRIO_MAX ? PRIO_MAX 1804static void
863 : prio < PRIO_MIN ? PRIO_MIN 1805api_schedule (pTHX)
864 : prio; 1806{
1807 struct coro_transfer_args ta;
865 1808
866 av_push (coro_ready [prio - PRIO_MIN], sv); 1809 prepare_schedule (aTHX_ &ta);
867 coro_nready++; 1810 TRANSFER (ta, 1);
1811}
868 1812
1813static void
1814api_schedule_to (pTHX_ SV *coro_sv)
1815{
1816 struct coro_transfer_args ta;
1817 struct coro *next = SvSTATE (coro_sv);
1818
1819 SvREFCNT_inc_NN (coro_sv);
1820 prepare_schedule_to (aTHX_ &ta, next);
1821}
1822
1823static int
1824api_cede (pTHX)
1825{
1826 struct coro_transfer_args ta;
1827
1828 prepare_cede (aTHX_ &ta);
1829
1830 if (expect_true (ta.prev != ta.next))
1831 {
1832 TRANSFER (ta, 1);
869 return; 1833 return 1;
1834 }
1835 else
1836 return 0;
1837}
1838
1839static int
1840api_cede_notself (pTHX)
1841{
1842 if (coro_nready)
1843 {
1844 struct coro_transfer_args ta;
1845
1846 prepare_cede_notself (aTHX_ &ta);
1847 TRANSFER (ta, 1);
1848 return 1;
1849 }
1850 else
1851 return 0;
1852}
1853
1854static void
1855api_trace (pTHX_ SV *coro_sv, int flags)
1856{
1857 struct coro *coro = SvSTATE (coro_sv);
1858
1859 if (coro->flags & CF_RUNNING)
1860 croak ("cannot enable tracing on a running coroutine, caught");
1861
1862 if (flags & CC_TRACE)
1863 {
1864 if (!coro->cctx)
1865 coro->cctx = cctx_new_run ();
1866 else if (!(coro->cctx->flags & CC_TRACE))
1867 croak ("cannot enable tracing on coroutine with custom stack, caught");
1868
1869 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1870 }
1871 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1872 {
1873 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1874
1875 if (coro->flags & CF_RUNNING)
1876 PL_runops = RUNOPS_DEFAULT;
1877 else
1878 coro->slot->runops = RUNOPS_DEFAULT;
1879 }
1880}
1881
1882static void
1883coro_call_on_destroy (pTHX_ struct coro *coro)
1884{
1885 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1886 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1887
1888 if (on_destroyp)
1889 {
1890 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1891
1892 while (AvFILLp (on_destroy) >= 0)
1893 {
1894 dSP; /* don't disturb outer sp */
1895 SV *cb = av_pop (on_destroy);
1896
1897 PUSHMARK (SP);
1898
1899 if (statusp)
1900 {
1901 int i;
1902 AV *status = (AV *)SvRV (*statusp);
1903 EXTEND (SP, AvFILLp (status) + 1);
1904
1905 for (i = 0; i <= AvFILLp (status); ++i)
1906 PUSHs (AvARRAY (status)[i]);
1907 }
1908
1909 PUTBACK;
1910 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1911 }
1912 }
1913}
1914
1915static void
1916slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1917{
1918 int i;
1919 HV *hv = (HV *)SvRV (coro_current);
1920 AV *av = newAV ();
1921
1922 av_extend (av, items - 1);
1923 for (i = 0; i < items; ++i)
1924 av_push (av, SvREFCNT_inc_NN (arg [i]));
1925
1926 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1927
1928 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1929 api_ready (aTHX_ sv_manager);
1930
1931 frame->prepare = prepare_schedule;
1932 frame->check = slf_check_repeat;
1933
1934 /* as a minor optimisation, we could unwind all stacks here */
1935 /* but that puts extra pressure on pp_slf, and is not worth much */
1936 /*coro_unwind_stacks (aTHX);*/
1937}
1938
1939/*****************************************************************************/
1940/* async pool handler */
1941
1942static int
1943slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1944{
1945 HV *hv = (HV *)SvRV (coro_current);
1946 struct coro *coro = (struct coro *)frame->data;
1947
1948 if (!coro->invoke_cb)
1949 return 1; /* loop till we have invoke */
1950 else
1951 {
1952 hv_store (hv, "desc", sizeof ("desc") - 1,
1953 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1954
1955 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1956
1957 {
1958 dSP;
1959 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1960 PUTBACK;
870 } 1961 }
871 1962
872 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1963 SvREFCNT_dec (GvAV (PL_defgv));
1964 GvAV (PL_defgv) = coro->invoke_av;
1965 coro->invoke_av = 0;
1966
1967 return 0;
1968 }
1969}
1970
1971static void
1972slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1973{
1974 HV *hv = (HV *)SvRV (coro_current);
1975 struct coro *coro = SvSTATE_hv ((SV *)hv);
1976
1977 if (expect_true (coro->saved_deffh))
1978 {
1979 /* subsequent iteration */
1980 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1981 coro->saved_deffh = 0;
1982
1983 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1984 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1985 {
1986 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1987 coro->invoke_av = newAV ();
1988
1989 frame->prepare = prepare_nop;
1990 }
1991 else
1992 {
1993 av_clear (GvAV (PL_defgv));
1994 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1995
1996 coro->prio = 0;
1997
1998 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1999 api_trace (aTHX_ coro_current, 0);
2000
2001 frame->prepare = prepare_schedule;
2002 av_push (av_async_pool, SvREFCNT_inc (hv));
2003 }
2004 }
2005 else
2006 {
2007 /* first iteration, simply fall through */
2008 frame->prepare = prepare_nop;
2009 }
2010
2011 frame->check = slf_check_pool_handler;
2012 frame->data = (void *)coro;
2013}
2014
2015/*****************************************************************************/
2016/* rouse callback */
2017
2018#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2019
2020static void
2021coro_rouse_callback (pTHX_ CV *cv)
2022{
2023 dXSARGS;
2024 SV *data = (SV *)GENSUB_ARG;
2025
2026 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2027 {
2028 /* first call, set args */
2029 SV *coro = SvRV (data);
2030 AV *av = newAV ();
2031
2032 SvRV_set (data, (SV *)av);
2033
2034 /* better take a full copy of the arguments */
2035 while (items--)
2036 av_store (av, items, newSVsv (ST (items)));
2037
2038 api_ready (aTHX_ coro);
2039 SvREFCNT_dec (coro);
2040 }
2041
2042 XSRETURN_EMPTY;
2043}
2044
2045static int
2046slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2047{
2048 SV *data = (SV *)frame->data;
2049
2050 if (CORO_THROW)
2051 return 0;
2052
2053 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2054 return 1;
2055
2056 /* now push all results on the stack */
2057 {
2058 dSP;
2059 AV *av = (AV *)SvRV (data);
2060 int i;
2061
2062 EXTEND (SP, AvFILLp (av) + 1);
2063 for (i = 0; i <= AvFILLp (av); ++i)
2064 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2065
2066 /* we have stolen the elements, so set length to zero and free */
2067 AvFILLp (av) = -1;
2068 av_undef (av);
2069
2070 PUTBACK;
2071 }
2072
2073 return 0;
2074}
2075
2076static void
2077slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2078{
2079 SV *cb;
2080
2081 if (items)
2082 cb = arg [0];
2083 else
2084 {
2085 struct coro *coro = SvSTATE_current;
2086
2087 if (!coro->rouse_cb)
2088 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2089
2090 cb = sv_2mortal (coro->rouse_cb);
2091 coro->rouse_cb = 0;
2092 }
2093
2094 if (!SvROK (cb)
2095 || SvTYPE (SvRV (cb)) != SVt_PVCV
2096 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2097 croak ("Coro::rouse_wait called with illegal callback argument,");
2098
2099 {
2100 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2101 SV *data = (SV *)GENSUB_ARG;
2102
2103 frame->data = (void *)data;
2104 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2105 frame->check = slf_check_rouse_wait;
2106 }
873} 2107}
874 2108
875static SV * 2109static SV *
876coro_deq (pTHX_ int min_prio) 2110coro_new_rouse_cb (pTHX)
877{ 2111{
878 int prio = PRIO_MAX - PRIO_MIN; 2112 HV *hv = (HV *)SvRV (coro_current);
2113 struct coro *coro = SvSTATE_hv (hv);
2114 SV *data = newRV_inc ((SV *)hv);
2115 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
879 2116
880 min_prio -= PRIO_MIN; 2117 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
881 if (min_prio < 0) 2118 SvREFCNT_dec (data); /* magicext increases the refcount */
882 min_prio = 0;
883 2119
884 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2120 SvREFCNT_dec (coro->rouse_cb);
885 if (av_len (coro_ready[prio]) >= 0) 2121 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2122
2123 return cb;
2124}
2125
2126/*****************************************************************************/
2127/* schedule-like-function opcode (SLF) */
2128
2129static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2130static const CV *slf_cv;
2131static SV **slf_argv;
2132static int slf_argc, slf_arga; /* count, allocated */
2133static I32 slf_ax; /* top of stack, for restore */
2134
2135/* this restores the stack in the case we patched the entersub, to */
2136/* recreate the stack frame as perl will on following calls */
2137/* since entersub cleared the stack */
2138static OP *
2139pp_restore (pTHX)
2140{
2141 int i;
2142 SV **SP = PL_stack_base + slf_ax;
2143
2144 PUSHMARK (SP);
2145
2146 EXTEND (SP, slf_argc + 1);
2147
2148 for (i = 0; i < slf_argc; ++i)
2149 PUSHs (sv_2mortal (slf_argv [i]));
2150
2151 PUSHs ((SV *)CvGV (slf_cv));
2152
2153 RETURNOP (slf_restore.op_first);
2154}
2155
2156static void
2157slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2158{
2159 SV **arg = (SV **)slf_frame.data;
2160
2161 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2162}
2163
2164static void
2165slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2166{
2167 if (items != 2)
2168 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2169
2170 frame->prepare = slf_prepare_transfer;
2171 frame->check = slf_check_nop;
2172 frame->data = (void *)arg; /* let's hope it will stay valid */
2173}
2174
2175static void
2176slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2177{
2178 frame->prepare = prepare_schedule;
2179 frame->check = slf_check_nop;
2180}
2181
2182static void
2183slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2184{
2185 struct coro *next = (struct coro *)slf_frame.data;
2186
2187 SvREFCNT_inc_NN (next->hv);
2188 prepare_schedule_to (aTHX_ ta, next);
2189}
2190
2191static void
2192slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2193{
2194 if (!items)
2195 croak ("Coro::schedule_to expects a coroutine argument, caught");
2196
2197 frame->data = (void *)SvSTATE (arg [0]);
2198 frame->prepare = slf_prepare_schedule_to;
2199 frame->check = slf_check_nop;
2200}
2201
2202static void
2203slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2204{
2205 api_ready (aTHX_ SvRV (coro_current));
2206
2207 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2208}
2209
2210static void
2211slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2212{
2213 frame->prepare = prepare_cede;
2214 frame->check = slf_check_nop;
2215}
2216
2217static void
2218slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2219{
2220 frame->prepare = prepare_cede_notself;
2221 frame->check = slf_check_nop;
2222}
2223
2224/*
2225 * these not obviously related functions are all rolled into one
2226 * function to increase chances that they all will call transfer with the same
2227 * stack offset
2228 * SLF stands for "schedule-like-function".
2229 */
2230static OP *
2231pp_slf (pTHX)
2232{
2233 I32 checkmark; /* mark SP to see how many elements check has pushed */
2234
2235 /* set up the slf frame, unless it has already been set-up */
2236 /* the latter happens when a new coro has been started */
2237 /* or when a new cctx was attached to an existing coroutine */
2238 if (expect_true (!slf_frame.prepare))
2239 {
2240 /* first iteration */
2241 dSP;
2242 SV **arg = PL_stack_base + TOPMARK + 1;
2243 int items = SP - arg; /* args without function object */
2244 SV *gv = *sp;
2245
2246 /* do a quick consistency check on the "function" object, and if it isn't */
2247 /* for us, divert to the real entersub */
2248 if (SvTYPE (gv) != SVt_PVGV
2249 || !GvCV (gv)
2250 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2251 return PL_ppaddr[OP_ENTERSUB](aTHX);
2252
2253 if (!(PL_op->op_flags & OPf_STACKED))
886 { 2254 {
887 coro_nready--; 2255 /* ampersand-form of call, use @_ instead of stack */
888 return av_shift (coro_ready[prio]); 2256 AV *av = GvAV (PL_defgv);
2257 arg = AvARRAY (av);
2258 items = AvFILLp (av) + 1;
889 } 2259 }
2260
2261 /* now call the init function, which needs to set up slf_frame */
2262 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2263 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2264
2265 /* pop args */
2266 SP = PL_stack_base + POPMARK;
2267
2268 PUTBACK;
2269 }
2270
2271 /* now that we have a slf_frame, interpret it! */
2272 /* we use a callback system not to make the code needlessly */
2273 /* complicated, but so we can run multiple perl coros from one cctx */
2274
2275 do
2276 {
2277 struct coro_transfer_args ta;
2278
2279 slf_frame.prepare (aTHX_ &ta);
2280 TRANSFER (ta, 0);
2281
2282 checkmark = PL_stack_sp - PL_stack_base;
2283 }
2284 while (slf_frame.check (aTHX_ &slf_frame));
2285
2286 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2287
2288 /* exception handling */
2289 if (expect_false (CORO_THROW))
2290 {
2291 SV *exception = sv_2mortal (CORO_THROW);
2292
2293 CORO_THROW = 0;
2294 sv_setsv (ERRSV, exception);
2295 croak (0);
2296 }
2297
2298 /* return value handling - mostly like entersub */
2299 /* make sure we put something on the stack in scalar context */
2300 if (GIMME_V == G_SCALAR)
2301 {
2302 dSP;
2303 SV **bot = PL_stack_base + checkmark;
2304
2305 if (sp == bot) /* too few, push undef */
2306 bot [1] = &PL_sv_undef;
2307 else if (sp != bot + 1) /* too many, take last one */
2308 bot [1] = *sp;
2309
2310 SP = bot + 1;
2311
2312 PUTBACK;
2313 }
2314
2315 return NORMAL;
2316}
2317
2318static void
2319api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2320{
2321 int i;
2322 SV **arg = PL_stack_base + ax;
2323 int items = PL_stack_sp - arg + 1;
2324
2325 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2326
2327 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2328 && PL_op->op_ppaddr != pp_slf)
2329 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2330
2331 CvFLAGS (cv) |= CVf_SLF;
2332 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2333 slf_cv = cv;
2334
2335 /* we patch the op, and then re-run the whole call */
2336 /* we have to put the same argument on the stack for this to work */
2337 /* and this will be done by pp_restore */
2338 slf_restore.op_next = (OP *)&slf_restore;
2339 slf_restore.op_type = OP_CUSTOM;
2340 slf_restore.op_ppaddr = pp_restore;
2341 slf_restore.op_first = PL_op;
2342
2343 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2344
2345 if (PL_op->op_flags & OPf_STACKED)
2346 {
2347 if (items > slf_arga)
2348 {
2349 slf_arga = items;
2350 free (slf_argv);
2351 slf_argv = malloc (slf_arga * sizeof (SV *));
2352 }
2353
2354 slf_argc = items;
2355
2356 for (i = 0; i < items; ++i)
2357 slf_argv [i] = SvREFCNT_inc (arg [i]);
2358 }
2359 else
2360 slf_argc = 0;
2361
2362 PL_op->op_ppaddr = pp_slf;
2363 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2364
2365 PL_op = (OP *)&slf_restore;
2366}
2367
2368/*****************************************************************************/
2369/* dynamic wind */
2370
2371static void
2372on_enterleave_call (pTHX_ SV *cb)
2373{
2374 dSP;
2375
2376 PUSHSTACK;
2377
2378 PUSHMARK (SP);
2379 PUTBACK;
2380 call_sv (cb, G_VOID | G_DISCARD);
2381 SPAGAIN;
2382
2383 POPSTACK;
2384}
2385
2386static SV *
2387coro_avp_pop_and_free (pTHX_ AV **avp)
2388{
2389 AV *av = *avp;
2390 SV *res = av_pop (av);
2391
2392 if (AvFILLp (av) < 0)
2393 {
2394 *avp = 0;
2395 SvREFCNT_dec (av);
2396 }
2397
2398 return res;
2399}
2400
2401static void
2402coro_pop_on_enter (pTHX_ void *coro)
2403{
2404 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2405 SvREFCNT_dec (cb);
2406}
2407
2408static void
2409coro_pop_on_leave (pTHX_ void *coro)
2410{
2411 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2412 on_enterleave_call (aTHX_ sv_2mortal (cb));
2413}
2414
2415/*****************************************************************************/
2416/* PerlIO::cede */
2417
2418typedef struct
2419{
2420 PerlIOBuf base;
2421 NV next, every;
2422} PerlIOCede;
2423
2424static IV
2425PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2426{
2427 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2428
2429 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2430 self->next = nvtime () + self->every;
2431
2432 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2433}
2434
2435static SV *
2436PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2437{
2438 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2439
2440 return newSVnv (self->every);
2441}
2442
2443static IV
2444PerlIOCede_flush (pTHX_ PerlIO *f)
2445{
2446 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2447 double now = nvtime ();
2448
2449 if (now >= self->next)
2450 {
2451 api_cede (aTHX);
2452 self->next = now + self->every;
2453 }
2454
2455 return PerlIOBuf_flush (aTHX_ f);
2456}
2457
2458static PerlIO_funcs PerlIO_cede =
2459{
2460 sizeof(PerlIO_funcs),
2461 "cede",
2462 sizeof(PerlIOCede),
2463 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2464 PerlIOCede_pushed,
2465 PerlIOBuf_popped,
2466 PerlIOBuf_open,
2467 PerlIOBase_binmode,
2468 PerlIOCede_getarg,
2469 PerlIOBase_fileno,
2470 PerlIOBuf_dup,
2471 PerlIOBuf_read,
2472 PerlIOBuf_unread,
2473 PerlIOBuf_write,
2474 PerlIOBuf_seek,
2475 PerlIOBuf_tell,
2476 PerlIOBuf_close,
2477 PerlIOCede_flush,
2478 PerlIOBuf_fill,
2479 PerlIOBase_eof,
2480 PerlIOBase_error,
2481 PerlIOBase_clearerr,
2482 PerlIOBase_setlinebuf,
2483 PerlIOBuf_get_base,
2484 PerlIOBuf_bufsiz,
2485 PerlIOBuf_get_ptr,
2486 PerlIOBuf_get_cnt,
2487 PerlIOBuf_set_ptrcnt,
2488};
2489
2490/*****************************************************************************/
2491/* Coro::Semaphore & Coro::Signal */
2492
2493static SV *
2494coro_waitarray_new (pTHX_ int count)
2495{
2496 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2497 AV *av = newAV ();
2498 SV **ary;
2499
2500 /* unfortunately, building manually saves memory */
2501 Newx (ary, 2, SV *);
2502 AvALLOC (av) = ary;
2503#if PERL_VERSION_ATLEAST (5,10,0)
2504 AvARRAY (av) = ary;
2505#else
2506 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2507 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2508 SvPVX ((SV *)av) = (char *)ary;
2509#endif
2510 AvMAX (av) = 1;
2511 AvFILLp (av) = 0;
2512 ary [0] = newSViv (count);
2513
2514 return newRV_noinc ((SV *)av);
2515}
2516
2517/* semaphore */
2518
2519static void
2520coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2521{
2522 SV *count_sv = AvARRAY (av)[0];
2523 IV count = SvIVX (count_sv);
2524
2525 count += adjust;
2526 SvIVX (count_sv) = count;
2527
2528 /* now wake up as many waiters as are expected to lock */
2529 while (count > 0 && AvFILLp (av) > 0)
2530 {
2531 SV *cb;
2532
2533 /* swap first two elements so we can shift a waiter */
2534 AvARRAY (av)[0] = AvARRAY (av)[1];
2535 AvARRAY (av)[1] = count_sv;
2536 cb = av_shift (av);
2537
2538 if (SvOBJECT (cb))
2539 {
2540 api_ready (aTHX_ cb);
2541 --count;
2542 }
2543 else if (SvTYPE (cb) == SVt_PVCV)
2544 {
2545 dSP;
2546 PUSHMARK (SP);
2547 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2548 PUTBACK;
2549 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2550 }
2551
2552 SvREFCNT_dec (cb);
2553 }
2554}
2555
2556static void
2557coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2558{
2559 /* call $sem->adjust (0) to possibly wake up some other waiters */
2560 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2561}
2562
2563static int
2564slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2565{
2566 AV *av = (AV *)frame->data;
2567 SV *count_sv = AvARRAY (av)[0];
2568
2569 /* if we are about to throw, don't actually acquire the lock, just throw */
2570 if (CORO_THROW)
2571 return 0;
2572 else if (SvIVX (count_sv) > 0)
2573 {
2574 SvSTATE_current->on_destroy = 0;
2575
2576 if (acquire)
2577 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2578 else
2579 coro_semaphore_adjust (aTHX_ av, 0);
2580
2581 return 0;
2582 }
2583 else
2584 {
2585 int i;
2586 /* if we were woken up but can't down, we look through the whole */
2587 /* waiters list and only add us if we aren't in there already */
2588 /* this avoids some degenerate memory usage cases */
2589
2590 for (i = 1; i <= AvFILLp (av); ++i)
2591 if (AvARRAY (av)[i] == SvRV (coro_current))
2592 return 1;
2593
2594 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2595 return 1;
2596 }
2597}
2598
2599static int
2600slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2601{
2602 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2603}
2604
2605static int
2606slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2607{
2608 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2609}
2610
2611static void
2612slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2613{
2614 AV *av = (AV *)SvRV (arg [0]);
2615
2616 if (SvIVX (AvARRAY (av)[0]) > 0)
2617 {
2618 frame->data = (void *)av;
2619 frame->prepare = prepare_nop;
2620 }
2621 else
2622 {
2623 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2624
2625 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2626 frame->prepare = prepare_schedule;
2627
2628 /* to avoid race conditions when a woken-up coro gets terminated */
2629 /* we arrange for a temporary on_destroy that calls adjust (0) */
2630 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2631 }
2632}
2633
2634static void
2635slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2636{
2637 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2638 frame->check = slf_check_semaphore_down;
2639}
2640
2641static void
2642slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2643{
2644 if (items >= 2)
2645 {
2646 /* callback form */
2647 AV *av = (AV *)SvRV (arg [0]);
2648 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2649
2650 av_push (av, SvREFCNT_inc_NN (cb_cv));
2651
2652 if (SvIVX (AvARRAY (av)[0]) > 0)
2653 coro_semaphore_adjust (aTHX_ av, 0);
2654
2655 frame->prepare = prepare_nop;
2656 frame->check = slf_check_nop;
2657 }
2658 else
2659 {
2660 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2661 frame->check = slf_check_semaphore_wait;
2662 }
2663}
2664
2665/* signal */
2666
2667static void
2668coro_signal_wake (pTHX_ AV *av, int count)
2669{
2670 SvIVX (AvARRAY (av)[0]) = 0;
2671
2672 /* now signal count waiters */
2673 while (count > 0 && AvFILLp (av) > 0)
2674 {
2675 SV *cb;
2676
2677 /* swap first two elements so we can shift a waiter */
2678 cb = AvARRAY (av)[0];
2679 AvARRAY (av)[0] = AvARRAY (av)[1];
2680 AvARRAY (av)[1] = cb;
2681
2682 cb = av_shift (av);
2683
2684 if (SvTYPE (cb) == SVt_PVCV)
2685 {
2686 dSP;
2687 PUSHMARK (SP);
2688 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2689 PUTBACK;
2690 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2691 }
2692 else
2693 {
2694 api_ready (aTHX_ cb);
2695 sv_setiv (cb, 0); /* signal waiter */
2696 }
2697
2698 SvREFCNT_dec (cb);
2699
2700 --count;
2701 }
2702}
2703
2704static int
2705slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2706{
2707 /* if we are about to throw, also stop waiting */
2708 return SvROK ((SV *)frame->data) && !CORO_THROW;
2709}
2710
2711static void
2712slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2713{
2714 AV *av = (AV *)SvRV (arg [0]);
2715
2716 if (items >= 2)
2717 {
2718 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2719 av_push (av, SvREFCNT_inc_NN (cb_cv));
2720
2721 if (SvIVX (AvARRAY (av)[0]))
2722 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2723
2724 frame->prepare = prepare_nop;
2725 frame->check = slf_check_nop;
2726 }
2727 else if (SvIVX (AvARRAY (av)[0]))
2728 {
2729 SvIVX (AvARRAY (av)[0]) = 0;
2730 frame->prepare = prepare_nop;
2731 frame->check = slf_check_nop;
2732 }
2733 else
2734 {
2735 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2736
2737 av_push (av, waiter);
2738
2739 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2740 frame->prepare = prepare_schedule;
2741 frame->check = slf_check_signal_wait;
2742 }
2743}
2744
2745/*****************************************************************************/
2746/* Coro::AIO */
2747
2748#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2749
2750/* helper storage struct */
2751struct io_state
2752{
2753 int errorno;
2754 I32 laststype; /* U16 in 5.10.0 */
2755 int laststatval;
2756 Stat_t statcache;
2757};
2758
2759static void
2760coro_aio_callback (pTHX_ CV *cv)
2761{
2762 dXSARGS;
2763 AV *state = (AV *)GENSUB_ARG;
2764 SV *coro = av_pop (state);
2765 SV *data_sv = newSV (sizeof (struct io_state));
2766
2767 av_extend (state, items - 1);
2768
2769 sv_upgrade (data_sv, SVt_PV);
2770 SvCUR_set (data_sv, sizeof (struct io_state));
2771 SvPOK_only (data_sv);
2772
2773 {
2774 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2775
2776 data->errorno = errno;
2777 data->laststype = PL_laststype;
2778 data->laststatval = PL_laststatval;
2779 data->statcache = PL_statcache;
2780 }
2781
2782 /* now build the result vector out of all the parameters and the data_sv */
2783 {
2784 int i;
2785
2786 for (i = 0; i < items; ++i)
2787 av_push (state, SvREFCNT_inc_NN (ST (i)));
2788 }
2789
2790 av_push (state, data_sv);
2791
2792 api_ready (aTHX_ coro);
2793 SvREFCNT_dec (coro);
2794 SvREFCNT_dec ((AV *)state);
2795}
2796
2797static int
2798slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2799{
2800 AV *state = (AV *)frame->data;
2801
2802 /* if we are about to throw, return early */
2803 /* this does not cancel the aio request, but at least */
2804 /* it quickly returns */
2805 if (CORO_THROW)
2806 return 0;
2807
2808 /* one element that is an RV? repeat! */
2809 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2810 return 1;
2811
2812 /* restore status */
2813 {
2814 SV *data_sv = av_pop (state);
2815 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2816
2817 errno = data->errorno;
2818 PL_laststype = data->laststype;
2819 PL_laststatval = data->laststatval;
2820 PL_statcache = data->statcache;
2821
2822 SvREFCNT_dec (data_sv);
2823 }
2824
2825 /* push result values */
2826 {
2827 dSP;
2828 int i;
2829
2830 EXTEND (SP, AvFILLp (state) + 1);
2831 for (i = 0; i <= AvFILLp (state); ++i)
2832 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2833
2834 PUTBACK;
2835 }
890 2836
891 return 0; 2837 return 0;
892} 2838}
893 2839
894static void 2840static void
895api_ready (SV *coro) 2841slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
896{ 2842{
897 dTHX; 2843 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
898
899 if (SvROK (coro))
900 coro = SvRV (coro);
901
902 LOCK;
903 coro_enq (aTHX_ SvREFCNT_inc (coro));
904 UNLOCK;
905}
906
907static void
908api_schedule (void)
909{
910 dTHX;
911
912 SV *prev, *next;
913
914 LOCK;
915
916 prev = SvRV (GvSV (coro_current)); 2844 SV *coro_hv = SvRV (coro_current);
917 next = coro_deq (aTHX_ PRIO_MIN); 2845 struct coro *coro = SvSTATE_hv (coro_hv);
918 2846
919 if (!next) 2847 /* put our coroutine id on the state arg */
920 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 2848 av_push (state, SvREFCNT_inc_NN (coro_hv));
921 2849
922 /* free this only after the transfer */ 2850 /* first see whether we have a non-zero priority and set it as AIO prio */
923 coro_mortal = prev; 2851 if (coro->prio)
924 SV_CORO (prev, "Coro::schedule"); 2852 {
2853 dSP;
925 2854
926 SvRV (GvSV (coro_current)) = next; 2855 static SV *prio_cv;
2856 static SV *prio_sv;
927 2857
928 SV_CORO (next, "Coro::schedule"); 2858 if (expect_false (!prio_cv))
2859 {
2860 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2861 prio_sv = newSViv (0);
2862 }
929 2863
930 UNLOCK; 2864 PUSHMARK (SP);
2865 sv_setiv (prio_sv, coro->prio);
2866 XPUSHs (prio_sv);
931 2867
932 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 2868 PUTBACK;
933 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2869 call_sv (prio_cv, G_VOID | G_DISCARD);
934} 2870 }
935 2871
936static void 2872 /* now call the original request */
937api_cede (void) 2873 {
938{ 2874 dSP;
939 dTHX; 2875 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2876 int i;
940 2877
941 LOCK; 2878 PUSHMARK (SP);
942 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
943 UNLOCK;
944 2879
945 api_schedule (); 2880 /* first push all args to the stack */
946} 2881 EXTEND (SP, items + 1);
947 2882
2883 for (i = 0; i < items; ++i)
2884 PUSHs (arg [i]);
2885
2886 /* now push the callback closure */
2887 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2888
2889 /* now call the AIO function - we assume our request is uncancelable */
2890 PUTBACK;
2891 call_sv ((SV *)req, G_VOID | G_DISCARD);
2892 }
2893
2894 /* now that the requets is going, we loop toll we have a result */
2895 frame->data = (void *)state;
2896 frame->prepare = prepare_schedule;
2897 frame->check = slf_check_aio_req;
2898}
2899
2900static void
2901coro_aio_req_xs (pTHX_ CV *cv)
2902{
2903 dXSARGS;
2904
2905 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2906
2907 XSRETURN_EMPTY;
2908}
2909
2910/*****************************************************************************/
2911
2912#if CORO_CLONE
2913# include "clone.c"
2914#endif
2915
948MODULE = Coro::State PACKAGE = Coro::State 2916MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
949 2917
950PROTOTYPES: ENABLE 2918PROTOTYPES: DISABLE
951 2919
952BOOT: 2920BOOT:
953{ /* {} necessary for stoopid perl-5.6.x */ 2921{
954#ifdef USE_ITHREADS 2922#ifdef USE_ITHREADS
955 MUTEX_INIT (&coro_mutex); 2923# if CORO_PTHREAD
2924 coro_thx = PERL_GET_CONTEXT;
956#endif 2925# endif
2926#endif
2927 BOOT_PAGESIZE;
957 2928
958 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2929 cctx_current = cctx_new_empty ();
959 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2930
2931 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2932 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2933
2934 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2935 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2936 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2937
2938 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2939 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2940 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2941
960 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2942 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
961 2943
962 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2944 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
963 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2945 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
964 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2946 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
965 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2947 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
966 2948
967 main_mainstack = PL_mainstack; 2949 main_mainstack = PL_mainstack;
2950 main_top_env = PL_top_env;
968 2951
2952 while (main_top_env->je_prev)
2953 main_top_env = main_top_env->je_prev;
2954
2955 {
2956 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2957
2958 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2959 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2960
2961 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2962 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2963 }
2964
969 coroapi.ver = CORO_API_VERSION; 2965 coroapi.ver = CORO_API_VERSION;
2966 coroapi.rev = CORO_API_REVISION;
2967
970 coroapi.transfer = api_transfer; 2968 coroapi.transfer = api_transfer;
971}
972 2969
973Coro::State 2970 coroapi.sv_state = SvSTATE_;
974_newprocess(args) 2971 coroapi.execute_slf = api_execute_slf;
975 SV * args 2972 coroapi.prepare_nop = prepare_nop;
976 PROTOTYPE: $ 2973 coroapi.prepare_schedule = prepare_schedule;
2974 coroapi.prepare_cede = prepare_cede;
2975 coroapi.prepare_cede_notself = prepare_cede_notself;
2976
2977 {
2978 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2979
2980 if (!svp) croak ("Time::HiRes is required");
2981 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2982
2983 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2984 }
2985
2986 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
2987}
2988
2989SV *
2990new (char *klass, ...)
2991 ALIAS:
2992 Coro::new = 1
977 CODE: 2993 CODE:
978 Coro__State coro; 2994{
2995 struct coro *coro;
2996 MAGIC *mg;
2997 HV *hv;
2998 CV *cb;
2999 int i;
979 3000
980 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3001 if (items > 1)
981 croak ("Coro::State::_newprocess expects an arrayref");
982 3002 {
3003 cb = coro_sv_2cv (aTHX_ ST (1));
3004
3005 if (!ix)
3006 {
3007 if (CvISXSUB (cb))
3008 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3009
3010 if (!CvROOT (cb))
3011 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3012 }
3013 }
3014
983 Newz (0, coro, 1, struct coro); 3015 Newz (0, coro, 1, struct coro);
3016 coro->args = newAV ();
3017 coro->flags = CF_NEW;
984 3018
985 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 3019 if (coro_first) coro_first->prev = coro;
986 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 3020 coro->next = coro_first;
987 /*coro->stack = 0;*/ 3021 coro_first = coro;
988 3022
989 /* same as JMPENV_BOOTSTRAP */ 3023 coro->hv = hv = newHV ();
990 /* we might be able to recycle start_env, but safe is safe */ 3024 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
991 /*Zero(&coro->start_env, 1, JMPENV);*/ 3025 mg->mg_flags |= MGf_DUP;
992 coro->start_env.je_ret = -1; 3026 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
993 coro->start_env.je_mustcatch = TRUE;
994 3027
995 RETVAL = coro; 3028 if (items > 1)
3029 {
3030 av_extend (coro->args, items - 1 + ix - 1);
3031
3032 if (ix)
3033 {
3034 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3035 cb = cv_coro_run;
3036 }
3037
3038 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3039
3040 for (i = 2; i < items; i++)
3041 av_push (coro->args, newSVsv (ST (i)));
3042 }
3043}
996 OUTPUT: 3044 OUTPUT:
997 RETVAL 3045 RETVAL
998 3046
999void 3047void
1000transfer(prev, next, flags) 3048transfer (...)
1001 SV *prev
1002 SV *next
1003 int flags
1004 PROTOTYPE: @ 3049 PROTOTYPE: $$
1005 CODE: 3050 CODE:
1006 PUTBACK; 3051 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1007 SV_CORO (next, "Coro::transfer"); 3052
1008 SV_CORO (prev, "Coro::transfer"); 3053bool
1009 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3054_destroy (SV *coro_sv)
1010 SPAGAIN; 3055 CODE:
3056 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3057 OUTPUT:
3058 RETVAL
1011 3059
1012void 3060void
1013DESTROY(coro)
1014 Coro::State coro
1015 CODE:
1016
1017 if (coro->mainstack && coro->mainstack != main_mainstack)
1018 {
1019 struct coro temp;
1020
1021 PUTBACK;
1022 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1023 LOAD (aTHX_ coro);
1024 SPAGAIN;
1025
1026 destroy_stacks (aTHX);
1027
1028 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1029 SPAGAIN;
1030
1031 coro->mainstack = 0;
1032 }
1033
1034 deallocate_stack (coro);
1035 SvREFCNT_dec (coro->args);
1036 Safefree (coro);
1037
1038void
1039_exit(code) 3061_exit (int code)
1040 int code
1041 PROTOTYPE: $ 3062 PROTOTYPE: $
1042 CODE: 3063 CODE:
1043 _exit (code); 3064 _exit (code);
1044 3065
1045MODULE = Coro::State PACKAGE = Coro::Cont 3066SV *
3067clone (Coro::State coro)
3068 CODE:
3069{
3070#if CORO_CLONE
3071 struct coro *ncoro = coro_clone (aTHX_ coro);
3072 MAGIC *mg;
3073 /* TODO: too much duplication */
3074 ncoro->hv = newHV ();
3075 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3076 mg->mg_flags |= MGf_DUP;
3077 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3078#else
3079 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3080#endif
3081}
3082 OUTPUT:
3083 RETVAL
1046 3084
1047# this is slightly dirty (should expose a c-level api) 3085int
3086cctx_stacksize (int new_stacksize = 0)
3087 PROTOTYPE: ;$
3088 CODE:
3089 RETVAL = cctx_stacksize;
3090 if (new_stacksize)
3091 {
3092 cctx_stacksize = new_stacksize;
3093 ++cctx_gen;
3094 }
3095 OUTPUT:
3096 RETVAL
3097
3098int
3099cctx_max_idle (int max_idle = 0)
3100 PROTOTYPE: ;$
3101 CODE:
3102 RETVAL = cctx_max_idle;
3103 if (max_idle > 1)
3104 cctx_max_idle = max_idle;
3105 OUTPUT:
3106 RETVAL
3107
3108int
3109cctx_count ()
3110 PROTOTYPE:
3111 CODE:
3112 RETVAL = cctx_count;
3113 OUTPUT:
3114 RETVAL
3115
3116int
3117cctx_idle ()
3118 PROTOTYPE:
3119 CODE:
3120 RETVAL = cctx_idle;
3121 OUTPUT:
3122 RETVAL
1048 3123
1049void 3124void
1050yield(...) 3125list ()
1051 PROTOTYPE: @ 3126 PROTOTYPE:
3127 PPCODE:
3128{
3129 struct coro *coro;
3130 for (coro = coro_first; coro; coro = coro->next)
3131 if (coro->hv)
3132 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3133}
3134
3135void
3136call (Coro::State coro, SV *coderef)
3137 ALIAS:
3138 eval = 1
3139 CODE:
3140{
3141 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3142 {
3143 struct coro *current = SvSTATE_current;
3144
3145 if (current != coro)
3146 {
3147 PUTBACK;
3148 save_perl (aTHX_ current);
3149 load_perl (aTHX_ coro);
3150 SPAGAIN;
3151 }
3152
3153 PUSHSTACK;
3154
3155 PUSHMARK (SP);
3156 PUTBACK;
3157
3158 if (ix)
3159 eval_sv (coderef, 0);
3160 else
3161 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3162
3163 POPSTACK;
3164 SPAGAIN;
3165
3166 if (current != coro)
3167 {
3168 PUTBACK;
3169 save_perl (aTHX_ coro);
3170 load_perl (aTHX_ current);
3171 SPAGAIN;
3172 }
3173 }
3174}
3175
3176SV *
3177is_ready (Coro::State coro)
3178 PROTOTYPE: $
3179 ALIAS:
3180 is_ready = CF_READY
3181 is_running = CF_RUNNING
3182 is_new = CF_NEW
3183 is_destroyed = CF_DESTROYED
3184 is_suspended = CF_SUSPENDED
3185 CODE:
3186 RETVAL = boolSV (coro->flags & ix);
3187 OUTPUT:
3188 RETVAL
3189
3190void
3191throw (Coro::State self, SV *throw = &PL_sv_undef)
3192 PROTOTYPE: $;$
1052 CODE: 3193 CODE:
1053 static SV *returnstk; 3194{
1054 SV *sv; 3195 struct coro *current = SvSTATE_current;
1055 AV *defav = GvAV (PL_defgv); 3196 SV **throwp = self == current ? &CORO_THROW : &self->except;
1056 struct coro *prev, *next;
1057
1058 if (!returnstk)
1059 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1060
1061 /* set up @_ -- ugly */
1062 av_clear (defav);
1063 av_fill (defav, items - 1);
1064 while (items--)
1065 av_store (defav, items, SvREFCNT_inc (ST(items)));
1066
1067 SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1068 sv = av_pop ((AV *)SvRV (returnstk));
1069 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1070 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1071 SvREFCNT_dec (sv); 3197 SvREFCNT_dec (*throwp);
1072 3198 SvGETMAGIC (throw);
1073 transfer (aTHX_ prev, next, 0); 3199 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
1074
1075MODULE = Coro::State PACKAGE = Coro
1076
1077# this is slightly dirty (should expose a c-level api)
1078
1079BOOT:
1080{
1081 int i;
1082 HV *stash = gv_stashpv ("Coro", TRUE);
1083
1084 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1085 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1086 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1087 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1088 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1089 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1090
1091 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1092 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1093
1094 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1095 coro_ready[i] = newAV ();
1096
1097 {
1098 SV *sv = perl_get_sv("Coro::API", 1);
1099
1100 coroapi.schedule = api_schedule;
1101 coroapi.cede = api_cede;
1102 coroapi.ready = api_ready;
1103 coroapi.nready = &coro_nready;
1104 coroapi.current = coro_current;
1105
1106 GCoroAPI = &coroapi;
1107 sv_setiv(sv, (IV)&coroapi);
1108 SvREADONLY_on(sv);
1109 }
1110} 3200}
1111
1112#if !PERL_MICRO
1113 3201
1114void 3202void
1115ready(self) 3203api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1116 SV * self 3204 PROTOTYPE: $;$
3205 C_ARGS: aTHX_ coro, flags
3206
3207SV *
3208has_cctx (Coro::State coro)
1117 PROTOTYPE: $ 3209 PROTOTYPE: $
1118 CODE: 3210 CODE:
1119 api_ready (self); 3211 /* maybe manage the running flag differently */
1120 3212 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1121#endif 3213 OUTPUT:
3214 RETVAL
1122 3215
1123int 3216int
3217is_traced (Coro::State coro)
3218 PROTOTYPE: $
3219 CODE:
3220 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3221 OUTPUT:
3222 RETVAL
3223
3224UV
3225rss (Coro::State coro)
3226 PROTOTYPE: $
3227 ALIAS:
3228 usecount = 1
3229 CODE:
3230 switch (ix)
3231 {
3232 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3233 case 1: RETVAL = coro->usecount; break;
3234 }
3235 OUTPUT:
3236 RETVAL
3237
3238void
3239force_cctx ()
3240 PROTOTYPE:
3241 CODE:
3242 cctx_current->idle_sp = 0;
3243
3244void
3245swap_defsv (Coro::State self)
3246 PROTOTYPE: $
3247 ALIAS:
3248 swap_defav = 1
3249 CODE:
3250 if (!self->slot)
3251 croak ("cannot swap state with coroutine that has no saved state,");
3252 else
3253 {
3254 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3255 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3256
3257 SV *tmp = *src; *src = *dst; *dst = tmp;
3258 }
3259
3260void
3261cancel (Coro::State self)
3262 CODE:
3263 coro_state_destroy (aTHX_ self);
3264 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3265
3266
3267MODULE = Coro::State PACKAGE = Coro
3268
3269BOOT:
3270{
3271 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3272 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3273 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3274 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3275 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3276 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3277 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3278 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3279 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3280
3281 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3282 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3283 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3284 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3285
3286 coro_stash = gv_stashpv ("Coro", TRUE);
3287
3288 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3289 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3290 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3291 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3292 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3293 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3294
3295 {
3296 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3297
3298 coroapi.schedule = api_schedule;
3299 coroapi.schedule_to = api_schedule_to;
3300 coroapi.cede = api_cede;
3301 coroapi.cede_notself = api_cede_notself;
3302 coroapi.ready = api_ready;
3303 coroapi.is_ready = api_is_ready;
3304 coroapi.nready = coro_nready;
3305 coroapi.current = coro_current;
3306
3307 /*GCoroAPI = &coroapi;*/
3308 sv_setiv (sv, (IV)&coroapi);
3309 SvREADONLY_on (sv);
3310 }
3311}
3312
3313void
3314terminate (...)
3315 CODE:
3316 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3317
3318void
3319schedule (...)
3320 CODE:
3321 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3322
3323void
3324schedule_to (...)
3325 CODE:
3326 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3327
3328void
3329cede_to (...)
3330 CODE:
3331 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3332
3333void
3334cede (...)
3335 CODE:
3336 CORO_EXECUTE_SLF_XS (slf_init_cede);
3337
3338void
3339cede_notself (...)
3340 CODE:
3341 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3342
3343void
3344_set_current (SV *current)
3345 PROTOTYPE: $
3346 CODE:
3347 SvREFCNT_dec (SvRV (coro_current));
3348 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3349
3350void
3351_set_readyhook (SV *hook)
3352 PROTOTYPE: $
3353 CODE:
3354 SvREFCNT_dec (coro_readyhook);
3355 SvGETMAGIC (hook);
3356 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3357
3358int
3359prio (Coro::State coro, int newprio = 0)
3360 PROTOTYPE: $;$
3361 ALIAS:
3362 nice = 1
3363 CODE:
3364{
3365 RETVAL = coro->prio;
3366
3367 if (items > 1)
3368 {
3369 if (ix)
3370 newprio = coro->prio - newprio;
3371
3372 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3373 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3374
3375 coro->prio = newprio;
3376 }
3377}
3378 OUTPUT:
3379 RETVAL
3380
3381SV *
3382ready (SV *self)
3383 PROTOTYPE: $
3384 CODE:
3385 RETVAL = boolSV (api_ready (aTHX_ self));
3386 OUTPUT:
3387 RETVAL
3388
3389int
1124nready(...) 3390nready (...)
1125 PROTOTYPE: 3391 PROTOTYPE:
1126 CODE: 3392 CODE:
1127 RETVAL = coro_nready; 3393 RETVAL = coro_nready;
1128 OUTPUT: 3394 OUTPUT:
1129 RETVAL 3395 RETVAL
1130 3396
1131void 3397void
1132schedule(...) 3398suspend (Coro::State self)
1133 PROTOTYPE: 3399 PROTOTYPE: $
1134 CODE: 3400 CODE:
1135 api_schedule (); 3401 self->flags |= CF_SUSPENDED;
1136 3402
1137void 3403void
1138cede(...) 3404resume (Coro::State self)
1139 PROTOTYPE: 3405 PROTOTYPE: $
1140 CODE: 3406 CODE:
3407 self->flags &= ~CF_SUSPENDED;
3408
3409void
3410_pool_handler (...)
3411 CODE:
3412 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3413
3414void
3415async_pool (SV *cv, ...)
3416 PROTOTYPE: &@
3417 PPCODE:
3418{
3419 HV *hv = (HV *)av_pop (av_async_pool);
3420 AV *av = newAV ();
3421 SV *cb = ST (0);
3422 int i;
3423
3424 av_extend (av, items - 2);
3425 for (i = 1; i < items; ++i)
3426 av_push (av, SvREFCNT_inc_NN (ST (i)));
3427
3428 if ((SV *)hv == &PL_sv_undef)
3429 {
3430 PUSHMARK (SP);
3431 EXTEND (SP, 2);
3432 PUSHs (sv_Coro);
3433 PUSHs ((SV *)cv_pool_handler);
3434 PUTBACK;
3435 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3436 SPAGAIN;
3437
3438 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3439 }
3440
3441 {
3442 struct coro *coro = SvSTATE_hv (hv);
3443
3444 assert (!coro->invoke_cb);
3445 assert (!coro->invoke_av);
3446 coro->invoke_cb = SvREFCNT_inc (cb);
3447 coro->invoke_av = av;
3448 }
3449
3450 api_ready (aTHX_ (SV *)hv);
3451
3452 if (GIMME_V != G_VOID)
3453 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3454 else
3455 SvREFCNT_dec (hv);
3456}
3457
3458SV *
3459rouse_cb ()
3460 PROTOTYPE:
3461 CODE:
3462 RETVAL = coro_new_rouse_cb (aTHX);
3463 OUTPUT:
3464 RETVAL
3465
3466void
3467rouse_wait (...)
3468 PROTOTYPE: ;$
3469 PPCODE:
3470 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3471
3472void
3473on_enter (SV *block)
3474 ALIAS:
3475 on_leave = 1
3476 PROTOTYPE: &
3477 CODE:
3478{
3479 struct coro *coro = SvSTATE_current;
3480 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3481
3482 block = (SV *)coro_sv_2cv (aTHX_ block);
3483
3484 if (!*avp)
3485 *avp = newAV ();
3486
3487 av_push (*avp, SvREFCNT_inc (block));
3488
3489 if (!ix)
3490 on_enterleave_call (aTHX_ block);
3491
3492 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3493 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3494 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3495}
3496
3497
3498MODULE = Coro::State PACKAGE = PerlIO::cede
3499
3500BOOT:
3501 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3502
3503
3504MODULE = Coro::State PACKAGE = Coro::Semaphore
3505
3506SV *
3507new (SV *klass, SV *count = 0)
3508 CODE:
3509{
3510 int semcnt = 1;
3511
3512 if (count)
3513 {
3514 SvGETMAGIC (count);
3515
3516 if (SvOK (count))
3517 semcnt = SvIV (count);
3518 }
3519
3520 RETVAL = sv_bless (
3521 coro_waitarray_new (aTHX_ semcnt),
3522 GvSTASH (CvGV (cv))
3523 );
3524}
3525 OUTPUT:
3526 RETVAL
3527
3528# helper for Coro::Channel and others
3529SV *
3530_alloc (int count)
3531 CODE:
3532 RETVAL = coro_waitarray_new (aTHX_ count);
3533 OUTPUT:
3534 RETVAL
3535
3536SV *
3537count (SV *self)
3538 CODE:
3539 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3540 OUTPUT:
3541 RETVAL
3542
3543void
3544up (SV *self, int adjust = 1)
3545 ALIAS:
3546 adjust = 1
3547 CODE:
3548 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3549
3550void
3551down (...)
3552 CODE:
3553 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3554
3555void
3556wait (...)
3557 CODE:
3558 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3559
3560void
3561try (SV *self)
3562 PPCODE:
3563{
3564 AV *av = (AV *)SvRV (self);
3565 SV *count_sv = AvARRAY (av)[0];
3566 IV count = SvIVX (count_sv);
3567
3568 if (count > 0)
3569 {
3570 --count;
3571 SvIVX (count_sv) = count;
3572 XSRETURN_YES;
3573 }
3574 else
3575 XSRETURN_NO;
3576}
3577
3578void
3579waiters (SV *self)
3580 PPCODE:
3581{
3582 AV *av = (AV *)SvRV (self);
3583 int wcount = AvFILLp (av) + 1 - 1;
3584
3585 if (GIMME_V == G_SCALAR)
3586 XPUSHs (sv_2mortal (newSViv (wcount)));
3587 else
3588 {
3589 int i;
3590 EXTEND (SP, wcount);
3591 for (i = 1; i <= wcount; ++i)
3592 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3593 }
3594}
3595
3596MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3597
3598void
3599_may_delete (SV *sem, int count, int extra_refs)
3600 PPCODE:
3601{
3602 AV *av = (AV *)SvRV (sem);
3603
3604 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3605 && AvFILLp (av) == 0 /* no waiters, just count */
3606 && SvIV (AvARRAY (av)[0]) == count)
3607 XSRETURN_YES;
3608
3609 XSRETURN_NO;
3610}
3611
3612MODULE = Coro::State PACKAGE = Coro::Signal
3613
3614SV *
3615new (SV *klass)
3616 CODE:
3617 RETVAL = sv_bless (
3618 coro_waitarray_new (aTHX_ 0),
3619 GvSTASH (CvGV (cv))
3620 );
3621 OUTPUT:
3622 RETVAL
3623
3624void
3625wait (...)
3626 CODE:
3627 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3628
3629void
3630broadcast (SV *self)
3631 CODE:
3632{
3633 AV *av = (AV *)SvRV (self);
3634 coro_signal_wake (aTHX_ av, AvFILLp (av));
3635}
3636
3637void
3638send (SV *self)
3639 CODE:
3640{
3641 AV *av = (AV *)SvRV (self);
3642
3643 if (AvFILLp (av))
3644 coro_signal_wake (aTHX_ av, 1);
3645 else
3646 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3647}
3648
3649IV
3650awaited (SV *self)
3651 CODE:
3652 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3653 OUTPUT:
3654 RETVAL
3655
3656
3657MODULE = Coro::State PACKAGE = Coro::AnyEvent
3658
3659BOOT:
3660 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3661
3662void
3663_schedule (...)
3664 CODE:
3665{
3666 static int incede;
3667
1141 api_cede (); 3668 api_cede_notself (aTHX);
1142 3669
3670 ++incede;
3671 while (coro_nready >= incede && api_cede (aTHX))
3672 ;
3673
3674 sv_setsv (sv_activity, &PL_sv_undef);
3675 if (coro_nready >= incede)
3676 {
3677 PUSHMARK (SP);
3678 PUTBACK;
3679 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3680 }
3681
3682 --incede;
3683}
3684
3685
3686MODULE = Coro::State PACKAGE = Coro::AIO
3687
3688void
3689_register (char *target, char *proto, SV *req)
3690 CODE:
3691{
3692 CV *req_cv = coro_sv_2cv (aTHX_ req);
3693 /* newXSproto doesn't return the CV on 5.8 */
3694 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3695 sv_setpv ((SV *)slf_cv, proto);
3696 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3697}
3698

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