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Comparing Coro/Coro/State.xs (file contents):
Revision 1.164 by root, Tue Sep 25 01:47:23 2007 UTC vs.
Revision 1.441 by root, Tue Mar 4 05:07:44 2014 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
18#define ECB_NO_THREADS 1
19#define ECB_NO_LIBM 1
20#include "ecb.h"
21
22#include <stddef.h>
11#include <stdio.h> 23#include <stdio.h>
12#include <errno.h> 24#include <errno.h>
13#include <assert.h> 25#include <assert.h>
14 26
15#ifdef HAVE_MMAP 27#ifndef SVs_PADSTALE
16# include <unistd.h> 28# define SVs_PADSTALE 0
17# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS
19# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON
21# else
22# undef HAVE_MMAP
23# endif 29#endif
30
31#ifdef PadARRAY
32# define NEWPADAPI 1
33# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
34#else
35typedef AV PADNAMELIST;
36# if !PERL_VERSION_ATLEAST(5,8,0)
37typedef AV PADLIST;
38typedef AV PAD;
24# endif 39# endif
25# include <limits.h> 40# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
26# ifndef PAGESIZE 41# define PadlistMAX(pl) AvFILLp (pl)
27# define PAGESIZE pagesize 42# define PadlistNAMES(pl) (*PadlistARRAY (pl))
28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 43# define PadARRAY AvARRAY
29static long pagesize; 44# define PadMAX AvFILLp
30# else 45# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
31# define BOOT_PAGESIZE (void)0
32# endif 46#endif
47
48/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
49/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
50#if PERL_VERSION_ATLEAST(5,19,0)
51# define SVt_BIND SVt_IV
52#endif
53
54#if defined(_WIN32)
55# undef HAS_GETTIMEOFDAY
56# undef setjmp
57# undef longjmp
58# undef _exit
59# define setjmp _setjmp /* deep magic */
33#else 60#else
34# define PAGESIZE 0 61# include <inttypes.h> /* most portable stdint.h */
35# define BOOT_PAGESIZE (void)0
36#endif
37
38#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 62#endif
44 63
45/* the maximum number of idle cctx that will be pooled */ 64/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 65static int cctx_max_idle = 4;
47 66
48#define PERL_VERSION_ATLEAST(a,b,c) \ 67#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
49 (PERL_REVISION > (a) \ 68# define HAS_SCOPESTACK_NAME 1
50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
79
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD
82#endif
83
84#ifndef CORO_STACKGUARD
85# define CORO_STACKGUARD 0
86#endif 69#endif
87 70
88/* prefer perl internal functions over our own? */ 71/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 72#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 73# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 74#endif
92 75
93/* The next macros try to return the current stack pointer, in an as 76/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */ 77 * portable way as possible. */
95#define dSTACKLEVEL volatile char stacklevel
96#define STACKLEVEL ((void *)&stacklevel)
97
98#define IN_DESTRUCT (PL_main_cv == Nullcv)
99
100#if __GNUC__ >= 3 78#if __GNUC__ >= 4
101# define attribute(x) __attribute__(x) 79# define dSTACKLEVEL int stacklevel_dummy
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 80# define STACKLEVEL __builtin_frame_address (0)
103#else 81#else
104# define attribute(x) 82# define dSTACKLEVEL volatile void *stacklevel
105# define BARRIER 83# define STACKLEVEL ((void *)&stacklevel)
106#endif 84#endif
107 85
108#define NOINLINE attribute ((noinline)) 86#define IN_DESTRUCT PL_dirty
109 87
110#include "CoroAPI.h" 88#include "CoroAPI.h"
89#define GCoroAPI (&coroapi) /* very sneaky */
111 90
112#ifdef USE_ITHREADS 91#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 92# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 93static void *coro_thx;
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif 94# endif
95#endif
120 96
121/* helper storage struct for Coro::AIO */ 97#ifdef __linux
122struct io_state 98# include <time.h> /* for timespec */
123{ 99# include <syscall.h> /* for SYS_* */
124 int errorno; 100# ifdef SYS_clock_gettime
125 I32 laststype; 101# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
126 int laststatval; 102# define CORO_CLOCK_MONOTONIC 1
127 Stat_t statcache; 103# define CORO_CLOCK_THREAD_CPUTIME_ID 3
128}; 104# endif
105#endif
129 106
107static double (*nvtime)(); /* so why doesn't it take void? */
108static void (*u2time)(pTHX_ UV ret[2]);
109
110/* we hijack an hopefully unused CV flag for our purposes */
111#define CVf_SLF 0x4000
112static OP *pp_slf (pTHX);
113static void slf_destroy (pTHX_ struct coro *coro);
114
115static U32 cctx_gen;
130static size_t coro_stacksize = CORO_STACKSIZE; 116static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 117static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 118static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 119static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 120static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 121static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
122
123static AV *av_destroy; /* destruction queue */
124static SV *sv_manager; /* the manager coro */
125static SV *sv_idle; /* $Coro::idle */
126
127static GV *irsgv; /* $/ */
128static GV *stdoutgv; /* *STDOUT */
129static SV *rv_diehook;
130static SV *rv_warnhook;
131static HV *hv_sig; /* %SIG */
136 132
137/* async_pool helper stuff */ 133/* async_pool helper stuff */
138static SV *sv_pool_rss; 134static SV *sv_pool_rss;
139static SV *sv_pool_size; 135static SV *sv_pool_size;
136static SV *sv_async_pool_idle; /* description string */
140static AV *av_async_pool; 137static AV *av_async_pool; /* idle pool */
138static SV *sv_Coro; /* class string */
139static CV *cv_pool_handler;
140
141/* Coro::AnyEvent */
142static SV *sv_activity;
143
144/* enable processtime/realtime profiling */
145static char enable_times;
146typedef U32 coro_ts[2];
147static coro_ts time_real, time_cpu;
148static char times_valid;
141 149
142static struct coro_cctx *cctx_first; 150static struct coro_cctx *cctx_first;
143static int cctx_count, cctx_idle; 151static int cctx_count, cctx_idle;
144 152
153enum
154{
155 CC_MAPPED = 0x01,
156 CC_NOREUSE = 0x02, /* throw this away after tracing */
157 CC_TRACE = 0x04,
158 CC_TRACE_SUB = 0x08, /* trace sub calls */
159 CC_TRACE_LINE = 0x10, /* trace each statement */
160 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
161};
162
145/* this is a structure representing a c-level coroutine */ 163/* this is a structure representing a c-level coroutine */
146typedef struct coro_cctx { 164typedef struct coro_cctx
165{
147 struct coro_cctx *next; 166 struct coro_cctx *next;
148 167
149 /* the stack */ 168 /* the stack */
150 void *sptr; 169 struct coro_stack stack;
151 size_t ssize;
152 170
153 /* cpu state */ 171 /* cpu state */
154 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 172 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
173#ifndef NDEBUG
155 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 174 JMPENV *idle_te; /* same as idle_sp, but for top_env */
175#endif
156 JMPENV *top_env; 176 JMPENV *top_env;
157 coro_context cctx; 177 coro_context cctx;
158 178
179 U32 gen;
159#if CORO_USE_VALGRIND 180#if CORO_USE_VALGRIND
160 int valgrind_id; 181 int valgrind_id;
161#endif 182#endif
162 char inuse, mapped; 183 unsigned char flags;
163} coro_cctx; 184} coro_cctx;
164 185
186static coro_cctx *cctx_current; /* the currently running cctx */
187
188/*****************************************************************************/
189
190static MGVTBL coro_state_vtbl;
191
165enum { 192enum
193{
166 CF_RUNNING = 0x0001, /* coroutine is running */ 194 CF_RUNNING = 0x0001, /* coroutine is running */
167 CF_READY = 0x0002, /* coroutine is ready */ 195 CF_READY = 0x0002, /* coroutine is ready */
168 CF_NEW = 0x0004, /* has never been switched to */ 196 CF_NEW = 0x0004, /* has never been switched to */
169 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 197 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
198 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
199 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
170}; 200};
171 201
202/* the structure where most of the perl state is stored, overlaid on the cxstack */
203typedef struct
204{
205 #define VARx(name,expr,type) type name;
206 #include "state.h"
207} perl_slots;
208
209/* how many context stack entries do we need for perl_slots */
210#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
211
172/* this is a structure representing a perl-level coroutine */ 212/* this is a structure representing a perl-level coroutine */
173struct coro { 213struct coro
214{
174 /* the c coroutine allocated to this perl coroutine, if any */ 215 /* the C coroutine allocated to this perl coroutine, if any */
175 coro_cctx *cctx; 216 coro_cctx *cctx;
176 217
218 /* ready queue */
219 struct coro *next_ready;
220
221 /* state data */
222 struct CoroSLF slf_frame; /* saved slf frame */
223 AV *mainstack;
224 perl_slots *slot; /* basically the saved sp */
225
226 CV *startcv; /* the CV to execute */
177 /* data associated with this coroutine (initial args) */ 227 AV *args; /* data associated with this coroutine (initial args) */
178 AV *args;
179 int refcnt;
180 int save; /* CORO_SAVE flags */
181 int flags; /* CF_ flags */ 228 int flags; /* CF_ flags */
229 HV *hv; /* the perl hash associated with this coro, if any */
182 230
183 /* optionally saved, might be zero */ 231 /* statistics */
184 AV *defav; /* @_ */ 232 int usecount; /* number of transfers to this coro */
185 SV *defsv; /* $_ */
186 SV *errsv; /* $@ */
187 GV *deffh; /* default filehandle */
188 SV *irssv; /* $/ */
189 SV *irssv_sv; /* real $/ cache */
190
191#define VAR(name,type) type name;
192# include "state.h"
193#undef VAR
194 233
195 /* coro process data */ 234 /* coro process data */
196 int prio; 235 int prio;
236 SV *except; /* exception to be thrown */
237 SV *rouse_cb; /* last rouse callback */
238 AV *on_destroy; /* callbacks or coros to notify on destroy */
239 AV *status; /* the exit status list */
240
241 /* async_pool */
242 SV *saved_deffh;
243 SV *invoke_cb;
244 AV *invoke_av;
245
246 /* on_enter/on_leave */
247 AV *on_enter;
248 AV *on_leave;
249
250 /* swap_sv */
251 AV *swap_sv;
252
253 /* times */
254 coro_ts t_cpu, t_real;
197 255
198 /* linked list */ 256 /* linked list */
199 struct coro *next, *prev; 257 struct coro *next, *prev;
200 HV *hv; /* the perl hash associated with this coro, if any */
201}; 258};
202 259
203typedef struct coro *Coro__State; 260typedef struct coro *Coro__State;
204typedef struct coro *Coro__State_or_hashref; 261typedef struct coro *Coro__State_or_hashref;
205 262
263/* the following variables are effectively part of the perl context */
264/* and get copied between struct coro and these variables */
265/* the main reason we don't support windows process emulation */
266static struct CoroSLF slf_frame; /* the current slf frame */
267
206/** Coro ********************************************************************/ 268/** Coro ********************************************************************/
207 269
208#define PRIO_MAX 3 270#define CORO_PRIO_MAX 3
209#define PRIO_HIGH 1 271#define CORO_PRIO_HIGH 1
210#define PRIO_NORMAL 0 272#define CORO_PRIO_NORMAL 0
211#define PRIO_LOW -1 273#define CORO_PRIO_LOW -1
212#define PRIO_IDLE -3 274#define CORO_PRIO_IDLE -3
213#define PRIO_MIN -4 275#define CORO_PRIO_MIN -4
214 276
215/* for Coro.pm */ 277/* for Coro.pm */
216static SV *coro_current; 278static SV *coro_current;
217static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 279static SV *coro_readyhook;
218static int coro_nready; 280static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
281static CV *cv_coro_run;
219static struct coro *coro_first; 282static struct coro *coro_first;
283#define coro_nready coroapi.nready
284
285/** JIT *********************************************************************/
286
287#if CORO_JIT
288 /* APPLE doesn't have mmap though */
289 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
290 #ifndef CORO_JIT_TYPE
291 #if ECB_AMD64 && CORO_JIT_UNIXY
292 #define CORO_JIT_TYPE "amd64-unix"
293 #elif __i386 && CORO_JIT_UNIXY
294 #define CORO_JIT_TYPE "x86-unix"
295 #endif
296 #endif
297#endif
298
299#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
300 #undef CORO_JIT
301#endif
302
303#if CORO_JIT
304 typedef void (*load_save_perl_slots_type)(perl_slots *);
305 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
306#endif
307
308/** Coro::Select ************************************************************/
309
310static OP *(*coro_old_pp_sselect) (pTHX);
311static SV *coro_select_select;
312
313/* horrible hack, but if it works... */
314static OP *
315coro_pp_sselect (pTHX)
316{
317 dSP;
318 PUSHMARK (SP - 4); /* fake argument list */
319 XPUSHs (coro_select_select);
320 PUTBACK;
321
322 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
323 PL_op->op_flags |= OPf_STACKED;
324 PL_op->op_private = 0;
325 return PL_ppaddr [OP_ENTERSUB](aTHX);
326}
327
328/** time stuff **************************************************************/
329
330#ifdef HAS_GETTIMEOFDAY
331
332ecb_inline void
333coro_u2time (pTHX_ UV ret[2])
334{
335 struct timeval tv;
336 gettimeofday (&tv, 0);
337
338 ret [0] = tv.tv_sec;
339 ret [1] = tv.tv_usec;
340}
341
342ecb_inline double
343coro_nvtime (void)
344{
345 struct timeval tv;
346 gettimeofday (&tv, 0);
347
348 return tv.tv_sec + tv.tv_usec * 1e-6;
349}
350
351ecb_inline void
352time_init (pTHX)
353{
354 nvtime = coro_nvtime;
355 u2time = coro_u2time;
356}
357
358#else
359
360ecb_inline void
361time_init (pTHX)
362{
363 SV **svp;
364
365 require_pv ("Time/HiRes.pm");
366
367 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
368
369 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
370 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
371
372 nvtime = INT2PTR (double (*)(), SvIV (*svp));
373
374 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
375 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
376}
377
378#endif
220 379
221/** lowlevel stuff **********************************************************/ 380/** lowlevel stuff **********************************************************/
222 381
223static AV * 382static SV * ecb_noinline
383coro_get_sv (pTHX_ const char *name, int create)
384{
385#if PERL_VERSION_ATLEAST (5,10,0)
386 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
387 get_sv (name, create);
388#endif
389 return get_sv (name, create);
390}
391
392static AV * ecb_noinline
393coro_get_av (pTHX_ const char *name, int create)
394{
395#if PERL_VERSION_ATLEAST (5,10,0)
396 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
397 get_av (name, create);
398#endif
399 return get_av (name, create);
400}
401
402static HV * ecb_noinline
403coro_get_hv (pTHX_ const char *name, int create)
404{
405#if PERL_VERSION_ATLEAST (5,10,0)
406 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
407 get_hv (name, create);
408#endif
409 return get_hv (name, create);
410}
411
412ecb_inline void
413coro_times_update (void)
414{
415#ifdef coro_clock_gettime
416 struct timespec ts;
417
418 ts.tv_sec = ts.tv_nsec = 0;
419 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
420 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
421
422 ts.tv_sec = ts.tv_nsec = 0;
423 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
424 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
425#else
426 dTHX;
427 UV tv[2];
428
429 u2time (aTHX_ tv);
430 time_real [0] = tv [0];
431 time_real [1] = tv [1] * 1000;
432#endif
433}
434
435ecb_inline void
436coro_times_add (struct coro *c)
437{
438 c->t_real [1] += time_real [1];
439 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
440 c->t_real [0] += time_real [0];
441
442 c->t_cpu [1] += time_cpu [1];
443 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
444 c->t_cpu [0] += time_cpu [0];
445}
446
447ecb_inline void
448coro_times_sub (struct coro *c)
449{
450 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
451 c->t_real [1] -= time_real [1];
452 c->t_real [0] -= time_real [0];
453
454 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
455 c->t_cpu [1] -= time_cpu [1];
456 c->t_cpu [0] -= time_cpu [0];
457}
458
459/*****************************************************************************/
460/* magic glue */
461
462#define CORO_MAGIC_type_cv 26
463#define CORO_MAGIC_type_state PERL_MAGIC_ext
464
465#define CORO_MAGIC_NN(sv, type) \
466 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
467 ? SvMAGIC (sv) \
468 : mg_find (sv, type))
469
470#define CORO_MAGIC(sv, type) \
471 (ecb_expect_true (SvMAGIC (sv)) \
472 ? CORO_MAGIC_NN (sv, type) \
473 : 0)
474
475#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
476#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
477
478ecb_inline MAGIC *
479SvSTATEhv_p (pTHX_ SV *coro)
480{
481 MAGIC *mg;
482
483 if (ecb_expect_true (
484 SvTYPE (coro) == SVt_PVHV
485 && (mg = CORO_MAGIC_state (coro))
486 && mg->mg_virtual == &coro_state_vtbl
487 ))
488 return mg;
489
490 return 0;
491}
492
493ecb_inline struct coro *
494SvSTATE_ (pTHX_ SV *coro)
495{
496 MAGIC *mg;
497
498 if (SvROK (coro))
499 coro = SvRV (coro);
500
501 mg = SvSTATEhv_p (aTHX_ coro);
502 if (!mg)
503 croak ("Coro::State object required");
504
505 return (struct coro *)mg->mg_ptr;
506}
507
508#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
509
510/* faster than SvSTATE, but expects a coroutine hv */
511#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
512#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
513
514/*****************************************************************************/
515/* padlist management and caching */
516
517ecb_inline PADLIST *
224coro_clone_padlist (pTHX_ CV *cv) 518coro_derive_padlist (pTHX_ CV *cv)
225{ 519{
226 AV *padlist = CvPADLIST (cv); 520 PADLIST *padlist = CvPADLIST (cv);
227 AV *newpadlist, *newpad; 521 PADLIST *newpadlist;
522 PAD *newpad;
523 PADOFFSET off = PadlistMAX (padlist) + 1;
228 524
229 newpadlist = newAV (); 525#if NEWPADAPI
526
527 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
528 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
529 while (!PadlistARRAY (padlist)[off - 1])
530 --off;
531
532 Perl_pad_push (aTHX_ padlist, off);
533
534 newpad = PadlistARRAY (padlist)[off];
535 PadlistARRAY (padlist)[off] = 0;
536
537#else
538
539#if PERL_VERSION_ATLEAST (5,10,0)
540 Perl_pad_push (aTHX_ padlist, off);
541#else
542 Perl_pad_push (aTHX_ padlist, off, 1);
543#endif
544
545 newpad = PadlistARRAY (padlist)[off];
546 PadlistMAX (padlist) = off - 1;
547
548#endif
549
550 newPADLIST (newpadlist);
551#if !PERL_VERSION_ATLEAST(5,15,3)
552 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
230 AvREAL_off (newpadlist); 553 AvREAL_off (newpadlist);
231#if PERL_VERSION_ATLEAST (5,9,0)
232 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
233#else
234 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
235#endif 554#endif
236 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
237 --AvFILLp (padlist);
238 555
239 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 556 /* Already extended to 2 elements by newPADLIST. */
240 av_store (newpadlist, 1, (SV *)newpad); 557 PadlistMAX (newpadlist) = 1;
558 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
559 PadlistARRAY (newpadlist)[1] = newpad;
241 560
242 return newpadlist; 561 return newpadlist;
243} 562}
244 563
245static void 564ecb_inline void
246free_padlist (pTHX_ AV *padlist) 565free_padlist (pTHX_ PADLIST *padlist)
247{ 566{
248 /* may be during global destruction */ 567 /* may be during global destruction */
249 if (SvREFCNT (padlist)) 568 if (!IN_DESTRUCT)
250 { 569 {
251 I32 i = AvFILLp (padlist); 570 I32 i = PadlistMAX (padlist);
252 while (i >= 0) 571
572 while (i > 0) /* special-case index 0 */
253 { 573 {
254 SV **svp = av_fetch (padlist, i--, FALSE); 574 /* we try to be extra-careful here */
575 PAD *pad = PadlistARRAY (padlist)[i--];
576
255 if (svp) 577 if (pad)
256 { 578 {
257 SV *sv; 579 I32 j = PadMAX (pad);
258 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 580
581 while (j >= 0)
259 SvREFCNT_dec (sv); 582 SvREFCNT_dec (PadARRAY (pad)[j--]);
260 583
584 PadMAX (pad) = -1;
261 SvREFCNT_dec (*svp); 585 SvREFCNT_dec (pad);
262 } 586 }
263 } 587 }
264 588
589 SvREFCNT_dec (PadlistNAMES (padlist));
590
591#if NEWPADAPI
592 Safefree (PadlistARRAY (padlist));
593 Safefree (padlist);
594#else
595 AvFILLp (padlist) = -1;
596 AvREAL_off (padlist);
265 SvREFCNT_dec ((SV*)padlist); 597 SvREFCNT_dec ((SV*)padlist);
598#endif
266 } 599 }
267} 600}
268 601
269static int 602static int
270coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 603coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271{ 604{
272 AV *padlist; 605 PADLIST *padlist;
273 AV *av = (AV *)mg->mg_obj; 606 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
607 size_t len = *(size_t *)mg->mg_ptr;
274 608
275 /* casting is fun. */ 609 /* perl manages to free our internal AV and _then_ call us */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 610 if (IN_DESTRUCT)
611 return 0;
612
613 while (len--)
277 free_padlist (aTHX_ padlist); 614 free_padlist (aTHX_ padlists[len]);
278
279 SvREFCNT_dec (av);
280 615
281 return 0; 616 return 0;
282} 617}
283 618
284#define PERL_MAGIC_coro PERL_MAGIC_ext 619static MGVTBL coro_cv_vtbl = {
285 620 0, 0, 0, 0,
286static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 621 coro_cv_free
287 622};
288#define CORO_MAGIC(cv) \
289 SvMAGIC (cv) \
290 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
291 ? SvMAGIC (cv) \
292 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
293 : 0
294 623
295/* the next two functions merely cache the padlists */ 624/* the next two functions merely cache the padlists */
296static void 625ecb_inline void
297get_padlist (pTHX_ CV *cv) 626get_padlist (pTHX_ CV *cv)
298{ 627{
299 MAGIC *mg = CORO_MAGIC (cv); 628 MAGIC *mg = CORO_MAGIC_cv (cv);
300 AV *av; 629 size_t *lenp;
301 630
302 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 631 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
303 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 632 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
304 else 633 else
305 { 634 {
306#if CORO_PREFER_PERL_FUNCTIONS 635#if CORO_PREFER_PERL_FUNCTIONS
307 /* this is probably cleaner, but also slower? */ 636 /* this is probably cleaner? but also slower! */
637 /* in practise, it seems to be less stable */
308 CV *cp = Perl_cv_clone (cv); 638 CV *cp = Perl_cv_clone (aTHX_ cv);
309 CvPADLIST (cv) = CvPADLIST (cp); 639 CvPADLIST (cv) = CvPADLIST (cp);
310 CvPADLIST (cp) = 0; 640 CvPADLIST (cp) = 0;
311 SvREFCNT_dec (cp); 641 SvREFCNT_dec (cp);
312#else 642#else
313 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 643 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
314#endif 644#endif
315 } 645 }
316} 646}
317 647
318static void 648ecb_inline void
319put_padlist (pTHX_ CV *cv) 649put_padlist (pTHX_ CV *cv)
320{ 650{
321 MAGIC *mg = CORO_MAGIC (cv); 651 MAGIC *mg = CORO_MAGIC_cv (cv);
322 AV *av;
323 652
324 if (!mg) 653 if (ecb_expect_false (!mg))
325 {
326 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
327 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
328 mg->mg_virtual = &vtbl_coro;
329 mg->mg_obj = (SV *)newAV ();
330 } 654 {
655 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
656 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
657 mg->mg_len = 1; /* so mg_free frees mg_ptr */
658 }
659 else
660 Renew (mg->mg_ptr,
661 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
662 char);
331 663
332 av = (AV *)mg->mg_obj; 664 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
333
334 if (AvFILLp (av) >= AvMAX (av))
335 av_extend (av, AvMAX (av) + 1);
336
337 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
338} 665}
339 666
340/** load & save, init *******************************************************/ 667/** load & save, init *******************************************************/
341 668
342#define SB do { 669ecb_inline void
343#define SE } while (0) 670swap_sv (SV *a, SV *b)
671{
672 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
673 SV tmp;
344 674
345#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 675 /* swap sv_any */
676 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
677
678 /* swap sv_flags */
679 SvFLAGS (&tmp) = SvFLAGS (a);
680 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
681 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
682
683#if PERL_VERSION_ATLEAST (5,10,0)
684 /* perl 5.10 and later complicates this _quite_ a bit, but it also
685 * is much faster, so no quarrels here. alternatively, we could
686 * sv_upgrade to avoid this.
687 */
688 {
689 /* swap sv_u */
690 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
691
692 /* if SvANY points to the head, we need to adjust the pointers,
693 * as the pointer for a still points to b, and maybe vice versa.
694 */
695 #define svany_in_head(type) \
696 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
697
698 if (svany_in_head (SvTYPE (a)))
699 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
700
701 if (svany_in_head (SvTYPE (b)))
702 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
703 }
704#endif
705}
706
707/* swap sv heads, at least logically */
708static void
709swap_svs (pTHX_ Coro__State c)
710{
711 int i;
712
713 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
714 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
715}
716
717#define SWAP_SVS(coro) \
718 if (ecb_expect_false ((coro)->swap_sv)) \
719 swap_svs (aTHX_ (coro))
720
721static void
722on_enterleave_call (pTHX_ SV *cb);
346 723
347static void 724static void
348load_perl (pTHX_ Coro__State c) 725load_perl (pTHX_ Coro__State c)
349{ 726{
350#define VAR(name,type) PL_ ## name = c->name; 727 perl_slots *slot = c->slot;
728 c->slot = 0;
729
730 PL_mainstack = c->mainstack;
731
732#if CORO_JIT
733 load_perl_slots (slot);
734#else
735 #define VARx(name,expr,type) expr = slot->name;
351# include "state.h" 736 #include "state.h"
352#undef VAR 737#endif
353
354 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
355 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
356 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
357 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
358
359 if (c->irssv)
360 {
361 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
362 {
363 SvREFCNT_dec (c->irssv);
364 c->irssv = 0;
365 }
366 else
367 {
368 REPLACE_SV (PL_rs, c->irssv);
369 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
370 sv_setsv (c->irssv_sv, PL_rs);
371 }
372 }
373 738
374 { 739 {
375 dSP; 740 dSP;
741
376 CV *cv; 742 CV *cv;
377 743
378 /* now do the ugly restore mess */ 744 /* now do the ugly restore mess */
379 while ((cv = (CV *)POPs)) 745 while (ecb_expect_true (cv = (CV *)POPs))
380 { 746 {
381 put_padlist (aTHX_ cv); /* mark this padlist as available */ 747 put_padlist (aTHX_ cv); /* mark this padlist as available */
382 CvDEPTH (cv) = PTR2IV (POPs); 748 CvDEPTH (cv) = PTR2IV (POPs);
383 CvPADLIST (cv) = (AV *)POPs; 749 CvPADLIST (cv) = (PADLIST *)POPs;
384 } 750 }
385 751
386 PUTBACK; 752 PUTBACK;
387 } 753 }
754
755 slf_frame = c->slf_frame;
756 CORO_THROW = c->except;
757
758 if (ecb_expect_false (enable_times))
759 {
760 if (ecb_expect_false (!times_valid))
761 coro_times_update ();
762
763 coro_times_sub (c);
764 }
765
766 if (ecb_expect_false (c->on_enter))
767 {
768 int i;
769
770 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
771 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
772 }
773
774 SWAP_SVS (c);
388} 775}
389 776
390static void 777static void
391save_perl (pTHX_ Coro__State c) 778save_perl (pTHX_ Coro__State c)
392{ 779{
780 SWAP_SVS (c);
781
782 if (ecb_expect_false (c->on_leave))
783 {
784 int i;
785
786 for (i = AvFILLp (c->on_leave); i >= 0; --i)
787 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
788 }
789
790 times_valid = 0;
791
792 if (ecb_expect_false (enable_times))
793 {
794 coro_times_update (); times_valid = 1;
795 coro_times_add (c);
796 }
797
798 c->except = CORO_THROW;
799 c->slf_frame = slf_frame;
800
393 { 801 {
394 dSP; 802 dSP;
395 I32 cxix = cxstack_ix; 803 I32 cxix = cxstack_ix;
396 PERL_CONTEXT *ccstk = cxstack; 804 PERL_CONTEXT *ccstk = cxstack;
397 PERL_SI *top_si = PL_curstackinfo; 805 PERL_SI *top_si = PL_curstackinfo;
… …
403 811
404 XPUSHs (Nullsv); 812 XPUSHs (Nullsv);
405 /* this loop was inspired by pp_caller */ 813 /* this loop was inspired by pp_caller */
406 for (;;) 814 for (;;)
407 { 815 {
408 while (cxix >= 0) 816 while (ecb_expect_true (cxix >= 0))
409 { 817 {
410 PERL_CONTEXT *cx = &ccstk[cxix--]; 818 PERL_CONTEXT *cx = &ccstk[cxix--];
411 819
412 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 820 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
413 { 821 {
414 CV *cv = cx->blk_sub.cv; 822 CV *cv = cx->blk_sub.cv;
415 823
416 if (CvDEPTH (cv)) 824 if (ecb_expect_true (CvDEPTH (cv)))
417 { 825 {
418 EXTEND (SP, 3); 826 EXTEND (SP, 3);
419 PUSHs ((SV *)CvPADLIST (cv)); 827 PUSHs ((SV *)CvPADLIST (cv));
420 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 828 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
421 PUSHs ((SV *)cv); 829 PUSHs ((SV *)cv);
422 830
423 CvDEPTH (cv) = 0; 831 CvDEPTH (cv) = 0;
424 get_padlist (aTHX_ cv); 832 get_padlist (aTHX_ cv);
425 } 833 }
426 } 834 }
427 } 835 }
428 836
429 if (top_si->si_type == PERLSI_MAIN) 837 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
430 break; 838 break;
431 839
432 top_si = top_si->si_prev; 840 top_si = top_si->si_prev;
433 ccstk = top_si->si_cxstack; 841 ccstk = top_si->si_cxstack;
434 cxix = top_si->si_cxix; 842 cxix = top_si->si_cxix;
435 } 843 }
436 844
437 PUTBACK; 845 PUTBACK;
438 } 846 }
439 847
440 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 848 /* allocate some space on the context stack for our purposes */
441 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 849 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
442 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 850 {
443 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 851 unsigned int i;
444 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
445 852
446#define VAR(name,type)c->name = PL_ ## name; 853 for (i = 0; i < SLOT_COUNT; ++i)
854 CXINC;
855
856 cxstack_ix -= SLOT_COUNT; /* undo allocation */
857 }
858
859 c->mainstack = PL_mainstack;
860
861 {
862 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
863
864#if CORO_JIT
865 save_perl_slots (slot);
866#else
867 #define VARx(name,expr,type) slot->name = expr;
447# include "state.h" 868 #include "state.h"
448#undef VAR 869#endif
870 }
449} 871}
450 872
451/* 873/*
452 * allocate various perl stacks. This is an exact copy 874 * allocate various perl stacks. This is almost an exact copy
453 * of perl.c:init_stacks, except that it uses less memory 875 * of perl.c:init_stacks, except that it uses less memory
454 * on the (sometimes correct) assumption that coroutines do 876 * on the (sometimes correct) assumption that coroutines do
455 * not usually need a lot of stackspace. 877 * not usually need a lot of stackspace.
456 */ 878 */
457#if CORO_PREFER_PERL_FUNCTIONS 879#if CORO_PREFER_PERL_FUNCTIONS
458# define coro_init_stacks init_stacks 880# define coro_init_stacks(thx) init_stacks ()
459#else 881#else
460static void 882static void
461coro_init_stacks (pTHX) 883coro_init_stacks (pTHX)
462{ 884{
463 PL_curstackinfo = new_stackinfo(64, 6); 885 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
464 PL_curstackinfo->si_type = PERLSI_MAIN; 886 PL_curstackinfo->si_type = PERLSI_MAIN;
465 PL_curstack = PL_curstackinfo->si_stack; 887 PL_curstack = PL_curstackinfo->si_stack;
466 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 888 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467 889
468 PL_stack_base = AvARRAY(PL_curstack); 890 PL_stack_base = AvARRAY(PL_curstack);
469 PL_stack_sp = PL_stack_base; 891 PL_stack_sp = PL_stack_base;
470 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 892 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471 893
472 New(50,PL_tmps_stack,64,SV*); 894 New(50,PL_tmps_stack,32,SV*);
473 PL_tmps_floor = -1; 895 PL_tmps_floor = -1;
474 PL_tmps_ix = -1; 896 PL_tmps_ix = -1;
475 PL_tmps_max = 64; 897 PL_tmps_max = 32;
476 898
477 New(54,PL_markstack,16,I32); 899 New(54,PL_markstack,16,I32);
478 PL_markstack_ptr = PL_markstack; 900 PL_markstack_ptr = PL_markstack;
479 PL_markstack_max = PL_markstack + 16; 901 PL_markstack_max = PL_markstack + 16;
480 902
481#ifdef SET_MARK_OFFSET 903#ifdef SET_MARK_OFFSET
482 SET_MARK_OFFSET; 904 SET_MARK_OFFSET;
483#endif 905#endif
484 906
485 New(54,PL_scopestack,16,I32); 907 New(54,PL_scopestack,8,I32);
486 PL_scopestack_ix = 0; 908 PL_scopestack_ix = 0;
487 PL_scopestack_max = 16; 909 PL_scopestack_max = 8;
910#if HAS_SCOPESTACK_NAME
911 New(54,PL_scopestack_name,8,const char*);
912#endif
488 913
489 New(54,PL_savestack,64,ANY); 914 New(54,PL_savestack,24,ANY);
490 PL_savestack_ix = 0; 915 PL_savestack_ix = 0;
491 PL_savestack_max = 64; 916 PL_savestack_max = 24;
492 917
493#if !PERL_VERSION_ATLEAST (5,9,0) 918#if !PERL_VERSION_ATLEAST (5,10,0)
494 New(54,PL_retstack,4,OP*); 919 New(54,PL_retstack,4,OP*);
495 PL_retstack_ix = 0; 920 PL_retstack_ix = 0;
496 PL_retstack_max = 4; 921 PL_retstack_max = 4;
497#endif 922#endif
498} 923}
… …
500 925
501/* 926/*
502 * destroy the stacks, the callchain etc... 927 * destroy the stacks, the callchain etc...
503 */ 928 */
504static void 929static void
505coro_destroy_stacks (pTHX) 930coro_destruct_stacks (pTHX)
506{ 931{
507 if (!IN_DESTRUCT)
508 {
509 /* restore all saved variables and stuff */
510 LEAVE_SCOPE (0);
511 assert (PL_tmps_floor == -1);
512
513 /* free all temporaries */
514 FREETMPS;
515 assert (PL_tmps_ix == -1);
516
517 /* unwind all extra stacks */
518 POPSTACK_TO (PL_mainstack);
519
520 /* unwind main stack */
521 dounwind (-1);
522 }
523
524 while (PL_curstackinfo->si_next) 932 while (PL_curstackinfo->si_next)
525 PL_curstackinfo = PL_curstackinfo->si_next; 933 PL_curstackinfo = PL_curstackinfo->si_next;
526 934
527 while (PL_curstackinfo) 935 while (PL_curstackinfo)
528 { 936 {
… …
537 } 945 }
538 946
539 Safefree (PL_tmps_stack); 947 Safefree (PL_tmps_stack);
540 Safefree (PL_markstack); 948 Safefree (PL_markstack);
541 Safefree (PL_scopestack); 949 Safefree (PL_scopestack);
950#if HAS_SCOPESTACK_NAME
951 Safefree (PL_scopestack_name);
952#endif
542 Safefree (PL_savestack); 953 Safefree (PL_savestack);
543#if !PERL_VERSION_ATLEAST (5,9,0) 954#if !PERL_VERSION_ATLEAST (5,10,0)
544 Safefree (PL_retstack); 955 Safefree (PL_retstack);
545#endif 956#endif
546} 957}
547 958
959#define CORO_RSS \
960 rss += sizeof (SYM (curstackinfo)); \
961 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
962 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
963 rss += SYM (tmps_max) * sizeof (SV *); \
964 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
965 rss += SYM (scopestack_max) * sizeof (I32); \
966 rss += SYM (savestack_max) * sizeof (ANY);
967
548static size_t 968static size_t
549coro_rss (struct coro *coro) 969coro_rss (pTHX_ struct coro *coro)
550{ 970{
551 size_t rss = sizeof (coro); 971 size_t rss = sizeof (*coro);
552 972
553 if (coro->mainstack) 973 if (coro->mainstack)
554 { 974 {
555 if (coro->flags & CF_RUNNING) 975 if (coro->flags & CF_RUNNING)
556 { 976 {
557 #define VAR(name,type)coro->name = PL_ ## name; 977 #define SYM(sym) PL_ ## sym
558 # include "state.h" 978 CORO_RSS;
559 #undef VAR 979 #undef SYM
560 } 980 }
561 981 else
562 rss += sizeof (coro->curstackinfo); 982 {
563 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 983 #define SYM(sym) coro->slot->sym
564 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 984 CORO_RSS;
565 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 985 #undef SYM
566 rss += coro->tmps_max * sizeof (SV *); 986 }
567 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
568 rss += coro->scopestack_max * sizeof (I32);
569 rss += coro->savestack_max * sizeof (ANY);
570
571#if !PERL_VERSION_ATLEAST (5,9,0)
572 rss += coro->retstack_max * sizeof (OP *);
573#endif
574 } 987 }
575 988
576 return rss; 989 return rss;
577} 990}
578 991
579/** coroutine stack handling ************************************************/ 992/** coroutine stack handling ************************************************/
580 993
994static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
995static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
996static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
997
998/* apparently < 5.8.8 */
999#ifndef MgPV_nolen_const
1000#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1001 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1002 (const char*)(mg)->mg_ptr)
1003#endif
1004
1005/*
1006 * This overrides the default magic get method of %SIG elements.
1007 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1008 * and instead of trying to save and restore the hash elements (extremely slow),
1009 * we just provide our own readback here.
1010 */
1011static int ecb_cold
1012coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1013{
1014 const char *s = MgPV_nolen_const (mg);
1015
1016 if (*s == '_')
1017 {
1018 SV **svp = 0;
1019
1020 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1021 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1022
1023 if (svp)
1024 {
1025 SV *ssv;
1026
1027 if (!*svp)
1028 ssv = &PL_sv_undef;
1029 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1030 ssv = sv_2mortal (newRV_inc (*svp));
1031 else
1032 ssv = *svp;
1033
1034 sv_setsv (sv, ssv);
1035 return 0;
1036 }
1037 }
1038
1039 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1040}
1041
1042static int ecb_cold
1043coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1044{
1045 const char *s = MgPV_nolen_const (mg);
1046
1047 if (*s == '_')
1048 {
1049 SV **svp = 0;
1050
1051 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1052 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1053
1054 if (svp)
1055 {
1056 SV *old = *svp;
1057 *svp = 0;
1058 SvREFCNT_dec (old);
1059 return 0;
1060 }
1061 }
1062
1063 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1064}
1065
1066static int ecb_cold
1067coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1068{
1069 const char *s = MgPV_nolen_const (mg);
1070
1071 if (*s == '_')
1072 {
1073 SV **svp = 0;
1074
1075 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1076 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1077
1078 if (svp)
1079 {
1080 SV *old = *svp;
1081 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1082 SvREFCNT_dec (old);
1083 return 0;
1084 }
1085 }
1086
1087 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1088}
1089
1090static void
1091prepare_nop (pTHX_ struct coro_transfer_args *ta)
1092{
1093 /* kind of mega-hacky, but works */
1094 ta->next = ta->prev = (struct coro *)ta;
1095}
1096
581static void 1097static int
1098slf_check_nop (pTHX_ struct CoroSLF *frame)
1099{
1100 return 0;
1101}
1102
1103static int
1104slf_check_repeat (pTHX_ struct CoroSLF *frame)
1105{
1106 return 1;
1107}
1108
1109static UNOP init_perl_op;
1110
1111ecb_noinline static void /* noinline to keep it out of the transfer fast path */
582setup_coro (pTHX_ struct coro *coro) 1112init_perl (pTHX_ struct coro *coro)
583{ 1113{
584 /* 1114 /*
585 * emulate part of the perl startup here. 1115 * emulate part of the perl startup here.
586 */ 1116 */
587 coro_init_stacks (aTHX); 1117 coro_init_stacks (aTHX);
588 1118
1119 PL_runops = RUNOPS_DEFAULT;
589 PL_curcop = &PL_compiling; 1120 PL_curcop = &PL_compiling;
590 PL_in_eval = EVAL_NULL; 1121 PL_in_eval = EVAL_NULL;
591 PL_comppad = 0; 1122 PL_comppad = 0;
1123 PL_comppad_name = 0;
1124 PL_comppad_name_fill = 0;
1125 PL_comppad_name_floor = 0;
592 PL_curpm = 0; 1126 PL_curpm = 0;
1127 PL_curpad = 0;
593 PL_localizing = 0; 1128 PL_localizing = 0;
594 PL_dirty = 0;
595 PL_restartop = 0; 1129 PL_restartop = 0;
1130#if PERL_VERSION_ATLEAST (5,10,0)
1131 PL_parser = 0;
1132#endif
1133 PL_hints = 0;
1134
1135 /* recreate the die/warn hooks */
1136 PL_diehook = SvREFCNT_inc (rv_diehook);
1137 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1138
1139 GvSV (PL_defgv) = newSV (0);
1140 GvAV (PL_defgv) = coro->args; coro->args = 0;
1141 GvSV (PL_errgv) = newSV (0);
1142 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1143 GvHV (PL_hintgv) = 0;
1144 PL_rs = newSVsv (GvSV (irsgv));
1145 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
596 1146
597 { 1147 {
598 dSP; 1148 dSP;
599 LOGOP myop; 1149 UNOP myop;
600 1150
601 SvREFCNT_dec (GvAV (PL_defgv));
602 GvAV (PL_defgv) = coro->args; coro->args = 0;
603
604 Zero (&myop, 1, LOGOP); 1151 Zero (&myop, 1, UNOP);
605 myop.op_next = Nullop; 1152 myop.op_next = Nullop;
1153 myop.op_type = OP_ENTERSUB;
606 myop.op_flags = OPf_WANT_VOID; 1154 myop.op_flags = OPf_WANT_VOID;
607 1155
608 PUSHMARK (SP); 1156 PUSHMARK (SP);
609 XPUSHs (av_shift (GvAV (PL_defgv))); 1157 PUSHs ((SV *)coro->startcv);
610 PUTBACK; 1158 PUTBACK;
611 PL_op = (OP *)&myop; 1159 PL_op = (OP *)&myop;
612 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1160 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
613 SPAGAIN;
614 } 1161 }
615 1162
616 ENTER; /* necessary e.g. for dounwind */ 1163 /* this newly created coroutine might be run on an existing cctx which most
617} 1164 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1165 */
1166 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1167 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1168 slf_frame.destroy = 0;
618 1169
1170 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1171 init_perl_op.op_next = PL_op;
1172 init_perl_op.op_type = OP_ENTERSUB;
1173 init_perl_op.op_ppaddr = pp_slf;
1174 /* no flags etc. required, as an init function won't be called */
1175
1176 PL_op = (OP *)&init_perl_op;
1177
1178 /* copy throw, in case it was set before init_perl */
1179 CORO_THROW = coro->except;
1180
1181 SWAP_SVS (coro);
1182
1183 if (ecb_expect_false (enable_times))
1184 {
1185 coro_times_update ();
1186 coro_times_sub (coro);
1187 }
1188}
1189
619static void 1190static void
1191coro_unwind_stacks (pTHX)
1192{
1193 if (!IN_DESTRUCT)
1194 {
1195 /* restore all saved variables and stuff */
1196 LEAVE_SCOPE (0);
1197 assert (PL_tmps_floor == -1);
1198
1199 /* free all temporaries */
1200 FREETMPS;
1201 assert (PL_tmps_ix == -1);
1202
1203 /* unwind all extra stacks */
1204 POPSTACK_TO (PL_mainstack);
1205
1206 /* unwind main stack */
1207 dounwind (-1);
1208 }
1209}
1210
1211static void
1212destroy_perl (pTHX_ struct coro *coro)
1213{
1214 SV *svf [9];
1215
1216 {
1217 SV *old_current = SvRV (coro_current);
1218 struct coro *current = SvSTATE (old_current);
1219
1220 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1221
1222 save_perl (aTHX_ current);
1223
1224 /* this will cause transfer_check to croak on block*/
1225 SvRV_set (coro_current, (SV *)coro->hv);
1226
1227 load_perl (aTHX_ coro);
1228
1229 coro_unwind_stacks (aTHX);
1230
1231 /* restore swapped sv's */
1232 SWAP_SVS (coro);
1233
1234 coro_destruct_stacks (aTHX);
1235
1236 /* now save some sv's to be free'd later */
1237 svf [0] = GvSV (PL_defgv);
1238 svf [1] = (SV *)GvAV (PL_defgv);
1239 svf [2] = GvSV (PL_errgv);
1240 svf [3] = (SV *)PL_defoutgv;
1241 svf [4] = PL_rs;
1242 svf [5] = GvSV (irsgv);
1243 svf [6] = (SV *)GvHV (PL_hintgv);
1244 svf [7] = PL_diehook;
1245 svf [8] = PL_warnhook;
1246 assert (9 == sizeof (svf) / sizeof (*svf));
1247
1248 SvRV_set (coro_current, old_current);
1249
1250 load_perl (aTHX_ current);
1251 }
1252
1253 {
1254 unsigned int i;
1255
1256 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1257 SvREFCNT_dec (svf [i]);
1258
1259 SvREFCNT_dec (coro->saved_deffh);
1260 SvREFCNT_dec (coro->rouse_cb);
1261 SvREFCNT_dec (coro->invoke_cb);
1262 SvREFCNT_dec (coro->invoke_av);
1263 }
1264}
1265
1266ecb_inline void
620free_coro_mortal (pTHX) 1267free_coro_mortal (pTHX)
621{ 1268{
622 if (coro_mortal) 1269 if (ecb_expect_true (coro_mortal))
623 { 1270 {
624 SvREFCNT_dec (coro_mortal); 1271 SvREFCNT_dec ((SV *)coro_mortal);
625 coro_mortal = 0; 1272 coro_mortal = 0;
626 } 1273 }
627} 1274}
628 1275
629/* inject a fake call to Coro::State::_cctx_init into the execution */ 1276static int
630/* _cctx_init should be careful, as it could be called at almost any time */ 1277runops_trace (pTHX)
631/* during execution of a perl program */
632static void NOINLINE
633prepare_cctx (pTHX_ coro_cctx *cctx)
634{ 1278{
635 dSP; 1279 COP *oldcop = 0;
636 LOGOP myop; 1280 int oldcxix = -2;
637 1281
638 Zero (&myop, 1, LOGOP); 1282 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
639 myop.op_next = PL_op; 1283 {
640 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1284 PERL_ASYNC_CHECK ();
641 1285
642 PUSHMARK (SP); 1286 if (cctx_current->flags & CC_TRACE_ALL)
643 EXTEND (SP, 2); 1287 {
644 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1288 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
645 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1289 {
646 PUTBACK; 1290 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
647 PL_op = (OP *)&myop; 1291 SV **bot, **top;
648 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1292 AV *av = newAV (); /* return values */
649 SPAGAIN; 1293 SV **cb;
1294 dSP;
1295
1296 GV *gv = CvGV (cx->blk_sub.cv);
1297 SV *fullname = sv_2mortal (newSV (0));
1298 if (isGV (gv))
1299 gv_efullname3 (fullname, gv, 0);
1300
1301 bot = PL_stack_base + cx->blk_oldsp + 1;
1302 top = cx->blk_gimme == G_ARRAY ? SP + 1
1303 : cx->blk_gimme == G_SCALAR ? bot + 1
1304 : bot;
1305
1306 av_extend (av, top - bot);
1307 while (bot < top)
1308 av_push (av, SvREFCNT_inc_NN (*bot++));
1309
1310 PL_runops = RUNOPS_DEFAULT;
1311 ENTER;
1312 SAVETMPS;
1313 EXTEND (SP, 3);
1314 PUSHMARK (SP);
1315 PUSHs (&PL_sv_no);
1316 PUSHs (fullname);
1317 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1318 PUTBACK;
1319 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1320 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1321 SPAGAIN;
1322 FREETMPS;
1323 LEAVE;
1324 PL_runops = runops_trace;
1325 }
1326
1327 if (oldcop != PL_curcop)
1328 {
1329 oldcop = PL_curcop;
1330
1331 if (PL_curcop != &PL_compiling)
1332 {
1333 SV **cb;
1334
1335 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1336 {
1337 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1338
1339 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1340 {
1341 dSP;
1342 GV *gv = CvGV (cx->blk_sub.cv);
1343 SV *fullname = sv_2mortal (newSV (0));
1344
1345 if (isGV (gv))
1346 gv_efullname3 (fullname, gv, 0);
1347
1348 PL_runops = RUNOPS_DEFAULT;
1349 ENTER;
1350 SAVETMPS;
1351 EXTEND (SP, 3);
1352 PUSHMARK (SP);
1353 PUSHs (&PL_sv_yes);
1354 PUSHs (fullname);
1355 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1356 PUTBACK;
1357 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1358 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1359 SPAGAIN;
1360 FREETMPS;
1361 LEAVE;
1362 PL_runops = runops_trace;
1363 }
1364
1365 oldcxix = cxstack_ix;
1366 }
1367
1368 if (cctx_current->flags & CC_TRACE_LINE)
1369 {
1370 dSP;
1371
1372 PL_runops = RUNOPS_DEFAULT;
1373 ENTER;
1374 SAVETMPS;
1375 EXTEND (SP, 3);
1376 PL_runops = RUNOPS_DEFAULT;
1377 PUSHMARK (SP);
1378 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1379 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1380 PUTBACK;
1381 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1382 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1383 SPAGAIN;
1384 FREETMPS;
1385 LEAVE;
1386 PL_runops = runops_trace;
1387 }
1388 }
1389 }
1390 }
1391 }
1392
1393 TAINT_NOT;
1394 return 0;
1395}
1396
1397static struct CoroSLF cctx_ssl_frame;
1398
1399static void
1400slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1401{
1402 ta->prev = 0;
1403}
1404
1405static int
1406slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1407{
1408 *frame = cctx_ssl_frame;
1409
1410 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1411}
1412
1413/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1414static void ecb_noinline
1415cctx_prepare (pTHX)
1416{
1417 PL_top_env = &PL_start_env;
1418
1419 if (cctx_current->flags & CC_TRACE)
1420 PL_runops = runops_trace;
1421
1422 /* we already must be executing an SLF op, there is no other valid way
1423 * that can lead to creation of a new cctx */
1424 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1425 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1426
1427 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1428 cctx_ssl_frame = slf_frame;
1429
1430 slf_frame.prepare = slf_prepare_set_stacklevel;
1431 slf_frame.check = slf_check_set_stacklevel;
1432}
1433
1434/* the tail of transfer: execute stuff we can only do after a transfer */
1435ecb_inline void
1436transfer_tail (pTHX)
1437{
1438 free_coro_mortal (aTHX);
1439}
1440
1441/* try to exit the same way perl's main function would do */
1442/* we do not bother resetting the environment or other things *7
1443/* that are not, uhm, essential */
1444/* this obviously also doesn't work when perl is embedded */
1445static void ecb_noinline ecb_cold
1446perlish_exit (pTHX)
1447{
1448 int exitstatus = perl_destruct (PL_curinterp);
1449 perl_free (PL_curinterp);
1450 exit (exitstatus);
650} 1451}
651 1452
652/* 1453/*
653 * this is a _very_ stripped down perl interpreter ;) 1454 * this is a _very_ stripped down perl interpreter ;)
654 */ 1455 */
655static void 1456static void
656coro_run (void *arg) 1457cctx_run (void *arg)
657{ 1458{
1459#ifdef USE_ITHREADS
1460# if CORO_PTHREAD
1461 PERL_SET_CONTEXT (coro_thx);
1462# endif
1463#endif
1464 {
658 dTHX; 1465 dTHX;
659 1466
660 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1467 /* normally we would need to skip the entersub here */
661 UNLOCK; 1468 /* not doing so will re-execute it, which is exactly what we want */
1469 /* PL_nop = PL_nop->op_next */
662 1470
663 PL_top_env = &PL_start_env;
664
665 /* inject a fake subroutine call to cctx_init */ 1471 /* inject a fake subroutine call to cctx_init */
666 prepare_cctx (aTHX_ (coro_cctx *)arg); 1472 cctx_prepare (aTHX);
667 1473
1474 /* cctx_run is the alternative tail of transfer() */
1475 transfer_tail (aTHX);
1476
668 /* somebody or something will hit me for both perl_run and PL_restartop */ 1477 /* somebody or something will hit me for both perl_run and PL_restartop */
669 PL_restartop = PL_op; 1478 PL_restartop = PL_op;
670 perl_run (PL_curinterp); 1479 perl_run (PL_curinterp);
671
672 /* 1480 /*
1481 * Unfortunately, there is no way to get at the return values of the
1482 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1483 * runtime errors here, as this is just a random interpreter, not a thread.
1484 */
1485
1486 /*
673 * If perl-run returns we assume exit() was being called or the coro 1487 * If perl-run returns we assume exit() was being called or the coro
674 * fell off the end, which seems to be the only valid (non-bug) 1488 * fell off the end, which seems to be the only valid (non-bug)
675 * reason for perl_run to return. We try to exit by jumping to the 1489 * reason for perl_run to return. We try to mimic whatever perl is normally
676 * bootstrap-time "top" top_env, as we cannot restore the "main" 1490 * doing in that case. YMMV.
677 * coroutine as Coro has no such concept
678 */ 1491 */
679 PL_top_env = main_top_env; 1492 perlish_exit (aTHX);
680 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1493 }
681} 1494}
682 1495
683static coro_cctx * 1496static coro_cctx *
684cctx_new () 1497cctx_new (void)
685{ 1498{
686 coro_cctx *cctx; 1499 coro_cctx *cctx;
687 void *stack_start;
688 size_t stack_size;
689 1500
690 ++cctx_count; 1501 ++cctx_count;
691
692 Newz (0, cctx, 1, coro_cctx); 1502 New (0, cctx, 1, coro_cctx);
693 1503
694#if HAVE_MMAP 1504 cctx->gen = cctx_gen;
1505 cctx->flags = 0;
1506 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
695 1507
696 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1508 return cctx;
697 /* mmap supposedly does allocate-on-write for us */ 1509}
698 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
699 1510
700 if (cctx->sptr != (void *)-1) 1511/* create a new cctx only suitable as source */
701 { 1512static coro_cctx *
702# if CORO_STACKGUARD 1513cctx_new_empty (void)
703 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1514{
704# endif 1515 coro_cctx *cctx = cctx_new ();
705 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1516
706 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1517 cctx->stack.sptr = 0;
707 cctx->mapped = 1; 1518 coro_create (&cctx->cctx, 0, 0, 0, 0);
1519
1520 return cctx;
1521}
1522
1523/* create a new cctx suitable as destination/running a perl interpreter */
1524static coro_cctx *
1525cctx_new_run (void)
1526{
1527 coro_cctx *cctx = cctx_new ();
1528
1529 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
708 } 1530 {
709 else
710#endif
711 {
712 cctx->ssize = coro_stacksize * (long)sizeof (long);
713 New (0, cctx->sptr, coro_stacksize, long);
714
715 if (!cctx->sptr)
716 {
717 perror ("FATAL: unable to allocate stack for coroutine"); 1531 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
718 _exit (EXIT_FAILURE); 1532 _exit (EXIT_FAILURE);
719 }
720
721 stack_start = cctx->sptr;
722 stack_size = cctx->ssize;
723 } 1533 }
724 1534
725 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
726 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1535 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
727 1536
728 return cctx; 1537 return cctx;
729} 1538}
730 1539
731static void 1540static void
732cctx_destroy (coro_cctx *cctx) 1541cctx_destroy (coro_cctx *cctx)
733{ 1542{
734 if (!cctx) 1543 if (!cctx)
735 return; 1544 return;
736 1545
1546 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1547
737 --cctx_count; 1548 --cctx_count;
1549 coro_destroy (&cctx->cctx);
738 1550
739#if CORO_USE_VALGRIND 1551 coro_stack_free (&cctx->stack);
740 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
741#endif
742
743#if HAVE_MMAP
744 if (cctx->mapped)
745 munmap (cctx->sptr, cctx->ssize);
746 else
747#endif
748 Safefree (cctx->sptr);
749 1552
750 Safefree (cctx); 1553 Safefree (cctx);
751} 1554}
1555
1556/* wether this cctx should be destructed */
1557#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
752 1558
753static coro_cctx * 1559static coro_cctx *
754cctx_get (pTHX) 1560cctx_get (pTHX)
755{ 1561{
756 while (cctx_first) 1562 while (ecb_expect_true (cctx_first))
757 { 1563 {
758 coro_cctx *cctx = cctx_first; 1564 coro_cctx *cctx = cctx_first;
759 cctx_first = cctx->next; 1565 cctx_first = cctx->next;
760 --cctx_idle; 1566 --cctx_idle;
761 1567
762 if (cctx->ssize >= coro_stacksize) 1568 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
763 return cctx; 1569 return cctx;
764 1570
765 cctx_destroy (cctx); 1571 cctx_destroy (cctx);
766 } 1572 }
767 1573
768 PL_op = PL_op->op_next;
769 return cctx_new (); 1574 return cctx_new_run ();
770} 1575}
771 1576
772static void 1577static void
773cctx_put (coro_cctx *cctx) 1578cctx_put (coro_cctx *cctx)
774{ 1579{
1580 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1581
775 /* free another cctx if overlimit */ 1582 /* free another cctx if overlimit */
776 if (cctx_idle >= MAX_IDLE_CCTX) 1583 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
777 { 1584 {
778 coro_cctx *first = cctx_first; 1585 coro_cctx *first = cctx_first;
779 cctx_first = first->next; 1586 cctx_first = first->next;
780 --cctx_idle; 1587 --cctx_idle;
781 1588
782 assert (!first->inuse);
783 cctx_destroy (first); 1589 cctx_destroy (first);
784 } 1590 }
785 1591
786 ++cctx_idle; 1592 ++cctx_idle;
787 cctx->next = cctx_first; 1593 cctx->next = cctx_first;
788 cctx_first = cctx; 1594 cctx_first = cctx;
789} 1595}
790 1596
791/** coroutine switching *****************************************************/ 1597/** coroutine switching *****************************************************/
792 1598
793/* never call directly, always through the coro_state_transfer global variable */ 1599static void
794static void NOINLINE
795transfer (pTHX_ struct coro *prev, struct coro *next) 1600transfer_check (pTHX_ struct coro *prev, struct coro *next)
1601{
1602 /* TODO: throwing up here is considered harmful */
1603
1604 if (ecb_expect_true (prev != next))
1605 {
1606 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1607 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1608
1609 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1610 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1611
1612#if !PERL_VERSION_ATLEAST (5,10,0)
1613 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1614 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1615#endif
1616 }
1617}
1618
1619/* always use the TRANSFER macro */
1620static void ecb_noinline /* noinline so we have a fixed stackframe */
1621transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
796{ 1622{
797 dSTACKLEVEL; 1623 dSTACKLEVEL;
798 1624
799 /* sometimes transfer is only called to set idle_sp */ 1625 /* sometimes transfer is only called to set idle_sp */
800 if (!next) 1626 if (ecb_expect_false (!prev))
801 { 1627 {
802 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1628 cctx_current->idle_sp = STACKLEVEL;
803 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1629 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
804 }
805 else if (prev != next)
806 { 1630 }
1631 else if (ecb_expect_true (prev != next))
1632 {
807 coro_cctx *prev__cctx; 1633 coro_cctx *cctx_prev;
808 1634
809 if (prev->flags & CF_NEW) 1635 if (ecb_expect_false (prev->flags & CF_NEW))
810 { 1636 {
811 /* create a new empty context */ 1637 /* create a new empty/source context */
812 Newz (0, prev->cctx, 1, coro_cctx);
813 prev->cctx->inuse = 1;
814 prev->flags &= ~CF_NEW; 1638 prev->flags &= ~CF_NEW;
815 prev->flags |= CF_RUNNING; 1639 prev->flags |= CF_RUNNING;
816 } 1640 }
817 1641
818 /*TODO: must not croak here */
819 if (!prev->flags & CF_RUNNING)
820 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
821
822 if (next->flags & CF_RUNNING)
823 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
824
825 if (next->flags & CF_DESTROYED)
826 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
827
828 prev->flags &= ~CF_RUNNING; 1642 prev->flags &= ~CF_RUNNING;
829 next->flags |= CF_RUNNING; 1643 next->flags |= CF_RUNNING;
830 1644
831 LOCK; 1645 /* first get rid of the old state */
1646 save_perl (aTHX_ prev);
832 1647
833 if (next->flags & CF_NEW) 1648 if (ecb_expect_false (next->flags & CF_NEW))
834 { 1649 {
835 /* need to start coroutine */ 1650 /* need to start coroutine */
836 next->flags &= ~CF_NEW; 1651 next->flags &= ~CF_NEW;
837 /* first get rid of the old state */
838 save_perl (aTHX_ prev);
839 /* setup coroutine call */ 1652 /* setup coroutine call */
840 setup_coro (aTHX_ next); 1653 init_perl (aTHX_ next);
841 /* need a new stack */
842 assert (!next->cctx);
843 } 1654 }
844 else 1655 else
1656 load_perl (aTHX_ next);
1657
1658 /* possibly untie and reuse the cctx */
1659 if (ecb_expect_true (
1660 cctx_current->idle_sp == STACKLEVEL
1661 && !(cctx_current->flags & CC_TRACE)
1662 && !force_cctx
1663 ))
845 { 1664 {
846 /* coroutine already started */ 1665 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
847 save_perl (aTHX_ prev); 1666 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
848 load_perl (aTHX_ next); 1667
1668 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1669 /* without this the next cctx_get might destroy the running cctx while still in use */
1670 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1671 if (ecb_expect_true (!next->cctx))
1672 next->cctx = cctx_get (aTHX);
1673
1674 cctx_put (cctx_current);
849 } 1675 }
1676 else
1677 prev->cctx = cctx_current;
850 1678
851 prev__cctx = prev->cctx; 1679 ++next->usecount;
852 1680
853 /* possibly "free" the cctx */ 1681 cctx_prev = cctx_current;
854 if (prev__cctx->idle_sp == STACKLEVEL) 1682 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1683
1684 next->cctx = 0;
1685
1686 if (ecb_expect_false (cctx_prev != cctx_current))
855 { 1687 {
856 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1688 cctx_prev->top_env = PL_top_env;
857 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1689 PL_top_env = cctx_current->top_env;
858 1690 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
859 prev->cctx = 0;
860
861 cctx_put (prev__cctx);
862 prev__cctx->inuse = 0;
863 } 1691 }
864 1692
865 if (!next->cctx) 1693 transfer_tail (aTHX);
866 {
867 next->cctx = cctx_get (aTHX);
868 assert (!next->cctx->inuse);
869 next->cctx->inuse = 1;
870 }
871
872 if (prev__cctx != next->cctx)
873 {
874 prev__cctx->top_env = PL_top_env;
875 PL_top_env = next->cctx->top_env;
876 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
877 }
878
879 free_coro_mortal (aTHX);
880 UNLOCK;
881 } 1694 }
882} 1695}
883 1696
884struct transfer_args 1697#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
885{
886 struct coro *prev, *next;
887};
888
889#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1698#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
890 1699
891/** high level stuff ********************************************************/ 1700/** high level stuff ********************************************************/
892 1701
1702/* this function is actually Coro, not Coro::State, but we call it from here */
1703/* because it is convenient - but it hasn't been declared yet for that reason */
893static int 1704static void
1705coro_call_on_destroy (pTHX_ struct coro *coro);
1706
1707static void
894coro_state_destroy (pTHX_ struct coro *coro) 1708coro_state_destroy (pTHX_ struct coro *coro)
895{ 1709{
896 if (coro->flags & CF_DESTROYED) 1710 if (coro->flags & CF_ZOMBIE)
897 return 0; 1711 return;
898 1712
1713 slf_destroy (aTHX_ coro);
1714
899 coro->flags |= CF_DESTROYED; 1715 coro->flags |= CF_ZOMBIE;
900 1716
901 if (coro->flags & CF_READY) 1717 if (coro->flags & CF_READY)
902 { 1718 {
903 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1719 /* reduce nready, as destroying a ready coro effectively unreadies it */
904 /* alternative: look through all ready queues and remove the coro */ 1720 /* alternative: look through all ready queues and remove the coro */
905 LOCK;
906 --coro_nready; 1721 --coro_nready;
907 UNLOCK;
908 } 1722 }
909 else 1723 else
910 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1724 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
911
912 if (coro->mainstack && coro->mainstack != main_mainstack)
913 {
914 struct coro temp;
915
916 assert (!(coro->flags & CF_RUNNING));
917
918 Zero (&temp, 1, struct coro);
919 temp.save = CORO_SAVE_ALL;
920
921 if (coro->flags & CF_RUNNING)
922 croak ("FATAL: tried to destroy currently running coroutine");
923
924 save_perl (aTHX_ &temp);
925 load_perl (aTHX_ coro);
926
927 coro_destroy_stacks (aTHX);
928
929 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
930
931 coro->mainstack = 0;
932 }
933
934 cctx_destroy (coro->cctx);
935 SvREFCNT_dec (coro->args);
936 1725
937 if (coro->next) coro->next->prev = coro->prev; 1726 if (coro->next) coro->next->prev = coro->prev;
938 if (coro->prev) coro->prev->next = coro->next; 1727 if (coro->prev) coro->prev->next = coro->next;
939 if (coro == coro_first) coro_first = coro->next; 1728 if (coro == coro_first) coro_first = coro->next;
940 1729
941 return 1; 1730 if (coro->mainstack
1731 && coro->mainstack != main_mainstack
1732 && coro->slot
1733 && !PL_dirty)
1734 destroy_perl (aTHX_ coro);
1735
1736 cctx_destroy (coro->cctx);
1737 SvREFCNT_dec (coro->startcv);
1738 SvREFCNT_dec (coro->args);
1739 SvREFCNT_dec (coro->swap_sv);
1740 SvREFCNT_dec (CORO_THROW);
1741
1742 coro_call_on_destroy (aTHX_ coro);
1743
1744 /* more destruction mayhem in coro_state_free */
942} 1745}
943 1746
944static int 1747static int
945coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1748coro_state_free (pTHX_ SV *sv, MAGIC *mg)
946{ 1749{
947 struct coro *coro = (struct coro *)mg->mg_ptr; 1750 struct coro *coro = (struct coro *)mg->mg_ptr;
948 mg->mg_ptr = 0; 1751 mg->mg_ptr = 0;
949 1752
950 coro->hv = 0;
951
952 if (--coro->refcnt < 0)
953 {
954 coro_state_destroy (aTHX_ coro); 1753 coro_state_destroy (aTHX_ coro);
1754 SvREFCNT_dec (coro->on_destroy);
1755 SvREFCNT_dec (coro->status);
1756
955 Safefree (coro); 1757 Safefree (coro);
956 }
957 1758
958 return 0; 1759 return 0;
959} 1760}
960 1761
961static int 1762static int ecb_cold
962coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1763coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
963{ 1764{
964 struct coro *coro = (struct coro *)mg->mg_ptr; 1765 /* called when perl clones the current process the slow way (windows process emulation) */
965 1766 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
966 ++coro->refcnt; 1767 mg->mg_ptr = 0;
1768 mg->mg_virtual = 0;
967 1769
968 return 0; 1770 return 0;
969} 1771}
970 1772
971static MGVTBL coro_state_vtbl = { 1773static MGVTBL coro_state_vtbl = {
… …
977#else 1779#else
978# define MGf_DUP 0 1780# define MGf_DUP 0
979#endif 1781#endif
980}; 1782};
981 1783
982static struct coro *
983SvSTATE_ (pTHX_ SV *coro)
984{
985 HV *stash;
986 MAGIC *mg;
987
988 if (SvROK (coro))
989 coro = SvRV (coro);
990
991 stash = SvSTASH (coro);
992 if (stash != coro_stash && stash != coro_state_stash)
993 {
994 /* very slow, but rare, check */
995 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
996 croak ("Coro::State object required");
997 }
998
999 mg = CORO_MAGIC (coro);
1000 return (struct coro *)mg->mg_ptr;
1001}
1002
1003#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
1004
1005static void 1784static void
1006prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1785prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1007{ 1786{
1008 ta->prev = SvSTATE (prev_sv); 1787 ta->prev = SvSTATE (prev_sv);
1009 ta->next = SvSTATE (next_sv); 1788 ta->next = SvSTATE (next_sv);
1789 TRANSFER_CHECK (*ta);
1010} 1790}
1011 1791
1012static void 1792static void
1013api_transfer (SV *prev_sv, SV *next_sv) 1793api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1794{
1795 struct coro_transfer_args ta;
1796
1797 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1798 TRANSFER (ta, 1);
1799}
1800
1801/** Coro ********************************************************************/
1802
1803ecb_inline void
1804coro_enq (pTHX_ struct coro *coro)
1805{
1806 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1807
1808 SvREFCNT_inc_NN (coro->hv);
1809
1810 coro->next_ready = 0;
1811 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1812 ready [1] = coro;
1813}
1814
1815ecb_inline struct coro *
1816coro_deq (pTHX)
1817{
1818 int prio;
1819
1820 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1821 {
1822 struct coro **ready = coro_ready [prio];
1823
1824 if (ready [0])
1825 {
1826 struct coro *coro = ready [0];
1827 ready [0] = coro->next_ready;
1828 return coro;
1829 }
1830 }
1831
1832 return 0;
1833}
1834
1835static void
1836invoke_sv_ready_hook_helper (void)
1014{ 1837{
1015 dTHX; 1838 dTHX;
1016 struct transfer_args ta; 1839 dSP;
1017 1840
1018 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1841 ENTER;
1019 TRANSFER (ta); 1842 SAVETMPS;
1843
1844 PUSHMARK (SP);
1845 PUTBACK;
1846 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1847
1848 FREETMPS;
1849 LEAVE;
1020} 1850}
1021 1851
1022static int 1852static int
1023api_save (SV *coro_sv, int new_save) 1853api_ready (pTHX_ SV *coro_sv)
1024{ 1854{
1025 dTHX;
1026 struct coro *coro = SvSTATE (coro_sv); 1855 struct coro *coro = SvSTATE (coro_sv);
1027 int old_save = coro->save;
1028
1029 if (new_save >= 0)
1030 coro->save = new_save;
1031
1032 return old_save;
1033}
1034
1035/** Coro ********************************************************************/
1036
1037static void
1038coro_enq (pTHX_ SV *coro_sv)
1039{
1040 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1041}
1042
1043static SV *
1044coro_deq (pTHX_ int min_prio)
1045{
1046 int prio = PRIO_MAX - PRIO_MIN;
1047
1048 min_prio -= PRIO_MIN;
1049 if (min_prio < 0)
1050 min_prio = 0;
1051
1052 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1053 if (AvFILLp (coro_ready [prio]) >= 0)
1054 return av_shift (coro_ready [prio]);
1055
1056 return 0;
1057}
1058
1059static int
1060api_ready (SV *coro_sv)
1061{
1062 dTHX;
1063 struct coro *coro;
1064
1065 if (SvROK (coro_sv))
1066 coro_sv = SvRV (coro_sv);
1067
1068 coro = SvSTATE (coro_sv);
1069 1856
1070 if (coro->flags & CF_READY) 1857 if (coro->flags & CF_READY)
1071 return 0; 1858 return 0;
1072 1859
1073 coro->flags |= CF_READY; 1860 coro->flags |= CF_READY;
1074 1861
1075 LOCK; 1862 coro_enq (aTHX_ coro);
1076 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1863
1077 ++coro_nready; 1864 if (!coro_nready++)
1078 UNLOCK; 1865 if (coroapi.readyhook)
1866 coroapi.readyhook ();
1079 1867
1080 return 1; 1868 return 1;
1081} 1869}
1082 1870
1083static int 1871static int
1084api_is_ready (SV *coro_sv) 1872api_is_ready (pTHX_ SV *coro_sv)
1085{ 1873{
1086 dTHX;
1087 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1874 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1088} 1875}
1089 1876
1877/* expects to own a reference to next->hv */
1878ecb_inline void
1879prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1880{
1881 SV *prev_sv = SvRV (coro_current);
1882
1883 ta->prev = SvSTATE_hv (prev_sv);
1884 ta->next = next;
1885
1886 TRANSFER_CHECK (*ta);
1887
1888 SvRV_set (coro_current, (SV *)next->hv);
1889
1890 free_coro_mortal (aTHX);
1891 coro_mortal = prev_sv;
1892}
1893
1090static void 1894static void
1091prepare_schedule (pTHX_ struct transfer_args *ta) 1895prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1092{ 1896{
1093 SV *prev_sv, *next_sv;
1094
1095 for (;;) 1897 for (;;)
1096 { 1898 {
1097 LOCK; 1899 struct coro *next = coro_deq (aTHX);
1098 next_sv = coro_deq (aTHX_ PRIO_MIN);
1099 1900
1901 if (ecb_expect_true (next))
1902 {
1903 /* cannot transfer to destroyed coros, skip and look for next */
1904 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1905 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1906 else
1907 {
1908 next->flags &= ~CF_READY;
1909 --coro_nready;
1910
1911 prepare_schedule_to (aTHX_ ta, next);
1912 break;
1913 }
1914 }
1915 else
1916 {
1100 /* nothing to schedule: call the idle handler */ 1917 /* nothing to schedule: call the idle handler */
1101 if (!next_sv) 1918 if (SvROK (sv_idle)
1919 && SvOBJECT (SvRV (sv_idle)))
1920 {
1921 if (SvRV (sv_idle) == SvRV (coro_current))
1922 {
1923 require_pv ("Carp");
1924
1925 {
1926 dSP;
1927
1928 ENTER;
1929 SAVETMPS;
1930
1931 PUSHMARK (SP);
1932 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1933 PUTBACK;
1934 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1935
1936 FREETMPS;
1937 LEAVE;
1938 }
1939 }
1940
1941 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1942 api_ready (aTHX_ SvRV (sv_idle));
1943 --coro_nready;
1944 }
1945 else
1946 {
1947 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1948 dSP;
1949
1950 ENTER;
1951 SAVETMPS;
1952
1953 PUSHMARK (SP);
1954 PUTBACK;
1955 call_sv (sv_idle, G_VOID | G_DISCARD);
1956
1957 FREETMPS;
1958 LEAVE;
1959 }
1960 }
1961 }
1962}
1963
1964ecb_inline void
1965prepare_cede (pTHX_ struct coro_transfer_args *ta)
1966{
1967 api_ready (aTHX_ coro_current);
1968 prepare_schedule (aTHX_ ta);
1969}
1970
1971ecb_inline void
1972prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1973{
1974 SV *prev = SvRV (coro_current);
1975
1976 if (coro_nready)
1977 {
1978 prepare_schedule (aTHX_ ta);
1979 api_ready (aTHX_ prev);
1980 }
1981 else
1982 prepare_nop (aTHX_ ta);
1983}
1984
1985static void
1986api_schedule (pTHX)
1987{
1988 struct coro_transfer_args ta;
1989
1990 prepare_schedule (aTHX_ &ta);
1991 TRANSFER (ta, 1);
1992}
1993
1994static void
1995api_schedule_to (pTHX_ SV *coro_sv)
1996{
1997 struct coro_transfer_args ta;
1998 struct coro *next = SvSTATE (coro_sv);
1999
2000 SvREFCNT_inc_NN (coro_sv);
2001 prepare_schedule_to (aTHX_ &ta, next);
2002}
2003
2004static int
2005api_cede (pTHX)
2006{
2007 struct coro_transfer_args ta;
2008
2009 prepare_cede (aTHX_ &ta);
2010
2011 if (ecb_expect_true (ta.prev != ta.next))
2012 {
2013 TRANSFER (ta, 1);
2014 return 1;
2015 }
2016 else
2017 return 0;
2018}
2019
2020static int
2021api_cede_notself (pTHX)
2022{
2023 if (coro_nready)
2024 {
2025 struct coro_transfer_args ta;
2026
2027 prepare_cede_notself (aTHX_ &ta);
2028 TRANSFER (ta, 1);
2029 return 1;
2030 }
2031 else
2032 return 0;
2033}
2034
2035static void
2036api_trace (pTHX_ SV *coro_sv, int flags)
2037{
2038 struct coro *coro = SvSTATE (coro_sv);
2039
2040 if (coro->flags & CF_RUNNING)
2041 croak ("cannot enable tracing on a running coroutine, caught");
2042
2043 if (flags & CC_TRACE)
2044 {
2045 if (!coro->cctx)
2046 coro->cctx = cctx_new_run ();
2047 else if (!(coro->cctx->flags & CC_TRACE))
2048 croak ("cannot enable tracing on coroutine with custom stack, caught");
2049
2050 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2051 }
2052 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2053 {
2054 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2055
2056 if (coro->flags & CF_RUNNING)
2057 PL_runops = RUNOPS_DEFAULT;
2058 else
2059 coro->slot->runops = RUNOPS_DEFAULT;
2060 }
2061}
2062
2063static void
2064coro_push_av (pTHX_ AV *av, I32 gimme_v)
2065{
2066 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2067 {
2068 dSP;
2069
2070 if (gimme_v == G_SCALAR)
2071 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2072 else
2073 {
2074 int i;
2075 EXTEND (SP, AvFILLp (av) + 1);
2076
2077 for (i = 0; i <= AvFILLp (av); ++i)
2078 PUSHs (AvARRAY (av)[i]);
2079 }
2080
2081 PUTBACK;
2082 }
2083}
2084
2085static void
2086coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2087{
2088 if (!coro->on_destroy)
2089 coro->on_destroy = newAV ();
2090
2091 av_push (coro->on_destroy, cb);
2092}
2093
2094static void
2095slf_destroy_join (pTHX_ struct CoroSLF *frame)
2096{
2097 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2098}
2099
2100static int
2101slf_check_join (pTHX_ struct CoroSLF *frame)
2102{
2103 struct coro *coro = (struct coro *)frame->data;
2104
2105 if (!coro->status)
2106 return 1;
2107
2108 frame->destroy = 0;
2109
2110 coro_push_av (aTHX_ coro->status, GIMME_V);
2111
2112 SvREFCNT_dec ((SV *)coro->hv);
2113
2114 return 0;
2115}
2116
2117static void
2118slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2119{
2120 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2121
2122 if (items > 1)
2123 croak ("join called with too many arguments");
2124
2125 if (coro->status)
2126 frame->prepare = prepare_nop;
2127 else
2128 {
2129 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2130 frame->prepare = prepare_schedule;
2131 }
2132
2133 frame->check = slf_check_join;
2134 frame->destroy = slf_destroy_join;
2135 frame->data = (void *)coro;
2136 SvREFCNT_inc (coro->hv);
2137}
2138
2139static void
2140coro_call_on_destroy (pTHX_ struct coro *coro)
2141{
2142 AV *od = coro->on_destroy;
2143
2144 if (!od)
2145 return;
2146
2147 coro->on_destroy = 0;
2148 sv_2mortal ((SV *)od);
2149
2150 while (AvFILLp (od) >= 0)
2151 {
2152 SV *cb = sv_2mortal (av_pop (od));
2153
2154 /* coro hv's (and only hv's at the moment) are supported as well */
2155 if (SvSTATEhv_p (aTHX_ cb))
2156 api_ready (aTHX_ cb);
2157 else
2158 {
2159 dSP; /* don't disturb outer sp */
2160 PUSHMARK (SP);
2161
2162 if (coro->status)
2163 {
2164 PUTBACK;
2165 coro_push_av (aTHX_ coro->status, G_ARRAY);
2166 SPAGAIN;
2167 }
2168
2169 PUTBACK;
2170 call_sv (cb, G_VOID | G_DISCARD);
2171 }
2172 }
2173}
2174
2175static void
2176coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2177{
2178 AV *av;
2179
2180 if (coro->status)
2181 {
2182 av = coro->status;
2183 av_clear (av);
2184 }
2185 else
2186 av = coro->status = newAV ();
2187
2188 /* items are actually not so common, so optimise for this case */
2189 if (items)
2190 {
2191 int i;
2192
2193 av_extend (av, items - 1);
2194
2195 for (i = 0; i < items; ++i)
2196 av_push (av, SvREFCNT_inc_NN (arg [i]));
2197 }
2198}
2199
2200static void
2201slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2202{
2203 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2204 api_ready (aTHX_ sv_manager);
2205
2206 frame->prepare = prepare_schedule;
2207 frame->check = slf_check_repeat;
2208
2209 /* as a minor optimisation, we could unwind all stacks here */
2210 /* but that puts extra pressure on pp_slf, and is not worth much */
2211 /*coro_unwind_stacks (aTHX);*/
2212}
2213
2214static void
2215slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2216{
2217 HV *coro_hv = (HV *)SvRV (coro_current);
2218
2219 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2220 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2221}
2222
2223static void
2224slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2225{
2226 HV *coro_hv;
2227 struct coro *coro;
2228
2229 if (items <= 0)
2230 croak ("Coro::cancel called without coro object,");
2231
2232 coro = SvSTATE (arg [0]);
2233 coro_hv = coro->hv;
2234
2235 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2236
2237 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2238 {
2239 /* coro currently busy cancelling something, so just notify it */
2240 coro->slf_frame.data = (void *)coro;
2241
2242 frame->prepare = prepare_nop;
2243 frame->check = slf_check_nop;
2244 }
2245 else if (coro_hv == (HV *)SvRV (coro_current))
2246 {
2247 /* cancelling the current coro is allowed, and equals terminate */
2248 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2249 }
2250 else
2251 {
2252 struct coro *self = SvSTATE_current;
2253
2254 /* otherwise we cancel directly, purely for speed reasons
2255 * unfortunately, this requires some magic trickery, as
2256 * somebody else could cancel us, so we have to fight the cancellation.
2257 * this is ugly, and hopefully fully worth the extra speed.
2258 * besides, I can't get the slow-but-safe version working...
2259 */
2260 slf_frame.data = 0;
2261 self->flags |= CF_NOCANCEL;
2262 coro_state_destroy (aTHX_ coro);
2263 self->flags &= ~CF_NOCANCEL;
2264
2265 if (slf_frame.data)
2266 {
2267 /* while we were busy we have been cancelled, so terminate */
2268 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2269 }
2270 else
2271 {
2272 frame->prepare = prepare_nop;
2273 frame->check = slf_check_nop;
2274 }
2275 }
2276}
2277
2278static int
2279slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2280{
2281 frame->prepare = 0;
2282 coro_unwind_stacks (aTHX);
2283
2284 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2285
2286 return 1;
2287}
2288
2289static int
2290safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2291{
2292 if (coro->cctx)
2293 croak ("coro inside C callback, unable to cancel at this time, caught");
2294
2295 if (coro->flags & CF_NEW)
2296 {
2297 coro_set_status (aTHX_ coro, arg, items);
2298 coro_state_destroy (aTHX_ coro);
2299 }
2300 else
2301 {
2302 if (!coro->slf_frame.prepare)
2303 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2304
2305 slf_destroy (aTHX_ coro);
2306
2307 coro_set_status (aTHX_ coro, arg, items);
2308 coro->slf_frame.prepare = prepare_nop;
2309 coro->slf_frame.check = slf_check_safe_cancel;
2310
2311 api_ready (aTHX_ (SV *)coro->hv);
2312 }
2313
2314 return 1;
2315}
2316
2317/*****************************************************************************/
2318/* async pool handler */
2319
2320static int
2321slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2322{
2323 HV *hv = (HV *)SvRV (coro_current);
2324 struct coro *coro = (struct coro *)frame->data;
2325
2326 if (!coro->invoke_cb)
2327 return 1; /* loop till we have invoke */
2328 else
2329 {
2330 hv_store (hv, "desc", sizeof ("desc") - 1,
2331 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2332
2333 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2334
2335 {
2336 dSP;
2337 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2338 PUTBACK;
2339 }
2340
2341 SvREFCNT_dec (GvAV (PL_defgv));
2342 GvAV (PL_defgv) = coro->invoke_av;
2343 coro->invoke_av = 0;
2344
2345 return 0;
2346 }
2347}
2348
2349static void
2350slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2351{
2352 HV *hv = (HV *)SvRV (coro_current);
2353 struct coro *coro = SvSTATE_hv ((SV *)hv);
2354
2355 if (ecb_expect_true (coro->saved_deffh))
2356 {
2357 /* subsequent iteration */
2358 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2359 coro->saved_deffh = 0;
2360
2361 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2362 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2363 {
2364 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2365 return;
2366 }
2367 else
2368 {
2369 av_clear (GvAV (PL_defgv));
2370 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2371
2372 coro->prio = 0;
2373
2374 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2375 api_trace (aTHX_ coro_current, 0);
2376
2377 frame->prepare = prepare_schedule;
2378 av_push (av_async_pool, SvREFCNT_inc (hv));
2379 }
2380 }
2381 else
2382 {
2383 /* first iteration, simply fall through */
2384 frame->prepare = prepare_nop;
2385 }
2386
2387 frame->check = slf_check_pool_handler;
2388 frame->data = (void *)coro;
2389}
2390
2391/*****************************************************************************/
2392/* rouse callback */
2393
2394#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2395
2396static void
2397coro_rouse_callback (pTHX_ CV *cv)
2398{
2399 dXSARGS;
2400 SV *data = (SV *)S_GENSUB_ARG;
2401
2402 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2403 {
2404 /* first call, set args */
2405 SV *coro = SvRV (data);
2406 AV *av = newAV ();
2407
2408 SvRV_set (data, (SV *)av);
2409
2410 /* better take a full copy of the arguments */
2411 while (items--)
2412 av_store (av, items, newSVsv (ST (items)));
2413
2414 api_ready (aTHX_ coro);
2415 SvREFCNT_dec (coro);
2416 }
2417
2418 XSRETURN_EMPTY;
2419}
2420
2421static int
2422slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2423{
2424 SV *data = (SV *)frame->data;
2425
2426 if (CORO_THROW)
2427 return 0;
2428
2429 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2430 return 1;
2431
2432 /* now push all results on the stack */
2433 {
2434 dSP;
2435 AV *av = (AV *)SvRV (data);
2436 int i;
2437
2438 EXTEND (SP, AvFILLp (av) + 1);
2439 for (i = 0; i <= AvFILLp (av); ++i)
2440 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2441
2442 /* we have stolen the elements, so set length to zero and free */
2443 AvFILLp (av) = -1;
2444 av_undef (av);
2445
2446 PUTBACK;
2447 }
2448
2449 return 0;
2450}
2451
2452static void
2453slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2454{
2455 SV *cb;
2456
2457 if (items)
2458 cb = arg [0];
2459 else
2460 {
2461 struct coro *coro = SvSTATE_current;
2462
2463 if (!coro->rouse_cb)
2464 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2465
2466 cb = sv_2mortal (coro->rouse_cb);
2467 coro->rouse_cb = 0;
2468 }
2469
2470 if (!SvROK (cb)
2471 || SvTYPE (SvRV (cb)) != SVt_PVCV
2472 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2473 croak ("Coro::rouse_wait called with illegal callback argument,");
2474
2475 {
2476 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2477 SV *data = (SV *)S_GENSUB_ARG;
2478
2479 frame->data = (void *)data;
2480 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2481 frame->check = slf_check_rouse_wait;
2482 }
2483}
2484
2485static SV *
2486coro_new_rouse_cb (pTHX)
2487{
2488 HV *hv = (HV *)SvRV (coro_current);
2489 struct coro *coro = SvSTATE_hv (hv);
2490 SV *data = newRV_inc ((SV *)hv);
2491 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2492
2493 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2494 SvREFCNT_dec (data); /* magicext increases the refcount */
2495
2496 SvREFCNT_dec (coro->rouse_cb);
2497 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2498
2499 return cb;
2500}
2501
2502/*****************************************************************************/
2503/* schedule-like-function opcode (SLF) */
2504
2505static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2506static const CV *slf_cv;
2507static SV **slf_argv;
2508static int slf_argc, slf_arga; /* count, allocated */
2509static I32 slf_ax; /* top of stack, for restore */
2510
2511/* this restores the stack in the case we patched the entersub, to */
2512/* recreate the stack frame as perl will on following calls */
2513/* since entersub cleared the stack */
2514static OP *
2515pp_restore (pTHX)
2516{
2517 int i;
2518 SV **SP = PL_stack_base + slf_ax;
2519
2520 PUSHMARK (SP);
2521
2522 EXTEND (SP, slf_argc + 1);
2523
2524 for (i = 0; i < slf_argc; ++i)
2525 PUSHs (sv_2mortal (slf_argv [i]));
2526
2527 PUSHs ((SV *)CvGV (slf_cv));
2528
2529 RETURNOP (slf_restore.op_first);
2530}
2531
2532static void
2533slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2534{
2535 SV **arg = (SV **)slf_frame.data;
2536
2537 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2538}
2539
2540static void
2541slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2542{
2543 if (items != 2)
2544 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2545
2546 frame->prepare = slf_prepare_transfer;
2547 frame->check = slf_check_nop;
2548 frame->data = (void *)arg; /* let's hope it will stay valid */
2549}
2550
2551static void
2552slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2553{
2554 frame->prepare = prepare_schedule;
2555 frame->check = slf_check_nop;
2556}
2557
2558static void
2559slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2560{
2561 struct coro *next = (struct coro *)slf_frame.data;
2562
2563 SvREFCNT_inc_NN (next->hv);
2564 prepare_schedule_to (aTHX_ ta, next);
2565}
2566
2567static void
2568slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2569{
2570 if (!items)
2571 croak ("Coro::schedule_to expects a coroutine argument, caught");
2572
2573 frame->data = (void *)SvSTATE (arg [0]);
2574 frame->prepare = slf_prepare_schedule_to;
2575 frame->check = slf_check_nop;
2576}
2577
2578static void
2579slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2580{
2581 api_ready (aTHX_ SvRV (coro_current));
2582
2583 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2584}
2585
2586static void
2587slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2588{
2589 frame->prepare = prepare_cede;
2590 frame->check = slf_check_nop;
2591}
2592
2593static void
2594slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2595{
2596 frame->prepare = prepare_cede_notself;
2597 frame->check = slf_check_nop;
2598}
2599
2600/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2601static void
2602slf_destroy (pTHX_ struct coro *coro)
2603{
2604 struct CoroSLF frame = coro->slf_frame;
2605
2606 /*
2607 * The on_destroy below most likely is from an SLF call.
2608 * Since by definition the SLF call will not finish when we destroy
2609 * the coro, we will have to force-finish it here, otherwise
2610 * cleanup functions cannot call SLF functions.
2611 */
2612 coro->slf_frame.prepare = 0;
2613 coro->slf_frame.destroy = 0;
2614
2615 /* this callback is reserved for slf functions needing to do cleanup */
2616 if (frame.destroy && frame.prepare && !PL_dirty)
2617 frame.destroy (aTHX_ &frame);
2618}
2619
2620/*
2621 * these not obviously related functions are all rolled into one
2622 * function to increase chances that they all will call transfer with the same
2623 * stack offset
2624 * SLF stands for "schedule-like-function".
2625 */
2626static OP *
2627pp_slf (pTHX)
2628{
2629 I32 checkmark; /* mark SP to see how many elements check has pushed */
2630
2631 /* set up the slf frame, unless it has already been set-up */
2632 /* the latter happens when a new coro has been started */
2633 /* or when a new cctx was attached to an existing coroutine */
2634 if (ecb_expect_true (!slf_frame.prepare))
2635 {
2636 /* first iteration */
2637 dSP;
2638 SV **arg = PL_stack_base + TOPMARK + 1;
2639 int items = SP - arg; /* args without function object */
2640 SV *gv = *sp;
2641
2642 /* do a quick consistency check on the "function" object, and if it isn't */
2643 /* for us, divert to the real entersub */
2644 if (SvTYPE (gv) != SVt_PVGV
2645 || !GvCV (gv)
2646 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2647 return PL_ppaddr[OP_ENTERSUB](aTHX);
2648
2649 if (!(PL_op->op_flags & OPf_STACKED))
2650 {
2651 /* ampersand-form of call, use @_ instead of stack */
2652 AV *av = GvAV (PL_defgv);
2653 arg = AvARRAY (av);
2654 items = AvFILLp (av) + 1;
2655 }
2656
2657 /* now call the init function, which needs to set up slf_frame */
2658 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2659 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2660
2661 /* pop args */
2662 SP = PL_stack_base + POPMARK;
2663
2664 PUTBACK;
2665 }
2666
2667 /* now that we have a slf_frame, interpret it! */
2668 /* we use a callback system not to make the code needlessly */
2669 /* complicated, but so we can run multiple perl coros from one cctx */
2670
2671 do
2672 {
2673 struct coro_transfer_args ta;
2674
2675 slf_frame.prepare (aTHX_ &ta);
2676 TRANSFER (ta, 0);
2677
2678 checkmark = PL_stack_sp - PL_stack_base;
2679 }
2680 while (slf_frame.check (aTHX_ &slf_frame));
2681
2682 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2683
2684 /* exception handling */
2685 if (ecb_expect_false (CORO_THROW))
2686 {
2687 SV *exception = sv_2mortal (CORO_THROW);
2688
2689 CORO_THROW = 0;
2690 sv_setsv (ERRSV, exception);
2691 croak (0);
2692 }
2693
2694 /* return value handling - mostly like entersub */
2695 /* make sure we put something on the stack in scalar context */
2696 if (GIMME_V == G_SCALAR
2697 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2698 {
2699 dSP;
2700 SV **bot = PL_stack_base + checkmark;
2701
2702 if (sp == bot) /* too few, push undef */
2703 bot [1] = &PL_sv_undef;
2704 else /* too many, take last one */
2705 bot [1] = *sp;
2706
2707 SP = bot + 1;
2708
2709 PUTBACK;
2710 }
2711
2712 return NORMAL;
2713}
2714
2715static void
2716api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2717{
2718 int i;
2719 SV **arg = PL_stack_base + ax;
2720 int items = PL_stack_sp - arg + 1;
2721
2722 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2723
2724 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2725 && PL_op->op_ppaddr != pp_slf)
2726 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2727
2728 CvFLAGS (cv) |= CVf_SLF;
2729 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2730 slf_cv = cv;
2731
2732 /* we patch the op, and then re-run the whole call */
2733 /* we have to put the same argument on the stack for this to work */
2734 /* and this will be done by pp_restore */
2735 slf_restore.op_next = (OP *)&slf_restore;
2736 slf_restore.op_type = OP_CUSTOM;
2737 slf_restore.op_ppaddr = pp_restore;
2738 slf_restore.op_first = PL_op;
2739
2740 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2741
2742 if (PL_op->op_flags & OPf_STACKED)
2743 {
2744 if (items > slf_arga)
2745 {
2746 slf_arga = items;
2747 Safefree (slf_argv);
2748 New (0, slf_argv, slf_arga, SV *);
2749 }
2750
2751 slf_argc = items;
2752
2753 for (i = 0; i < items; ++i)
2754 slf_argv [i] = SvREFCNT_inc (arg [i]);
2755 }
2756 else
2757 slf_argc = 0;
2758
2759 PL_op->op_ppaddr = pp_slf;
2760 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2761
2762 PL_op = (OP *)&slf_restore;
2763}
2764
2765/*****************************************************************************/
2766/* dynamic wind */
2767
2768static void
2769on_enterleave_call (pTHX_ SV *cb)
2770{
2771 dSP;
2772
2773 PUSHSTACK;
2774
2775 PUSHMARK (SP);
2776 PUTBACK;
2777 call_sv (cb, G_VOID | G_DISCARD);
2778 SPAGAIN;
2779
2780 POPSTACK;
2781}
2782
2783static SV *
2784coro_avp_pop_and_free (pTHX_ AV **avp)
2785{
2786 AV *av = *avp;
2787 SV *res = av_pop (av);
2788
2789 if (AvFILLp (av) < 0)
2790 {
2791 *avp = 0;
2792 SvREFCNT_dec (av);
2793 }
2794
2795 return res;
2796}
2797
2798static void
2799coro_pop_on_enter (pTHX_ void *coro)
2800{
2801 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2802 SvREFCNT_dec (cb);
2803}
2804
2805static void
2806coro_pop_on_leave (pTHX_ void *coro)
2807{
2808 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2809 on_enterleave_call (aTHX_ sv_2mortal (cb));
2810}
2811
2812/*****************************************************************************/
2813/* PerlIO::cede */
2814
2815typedef struct
2816{
2817 PerlIOBuf base;
2818 NV next, every;
2819} PerlIOCede;
2820
2821static IV ecb_cold
2822PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2823{
2824 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2825
2826 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2827 self->next = nvtime () + self->every;
2828
2829 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2830}
2831
2832static SV * ecb_cold
2833PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2834{
2835 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2836
2837 return newSVnv (self->every);
2838}
2839
2840static IV
2841PerlIOCede_flush (pTHX_ PerlIO *f)
2842{
2843 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2844 double now = nvtime ();
2845
2846 if (now >= self->next)
2847 {
2848 api_cede (aTHX);
2849 self->next = now + self->every;
2850 }
2851
2852 return PerlIOBuf_flush (aTHX_ f);
2853}
2854
2855static PerlIO_funcs PerlIO_cede =
2856{
2857 sizeof(PerlIO_funcs),
2858 "cede",
2859 sizeof(PerlIOCede),
2860 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2861 PerlIOCede_pushed,
2862 PerlIOBuf_popped,
2863 PerlIOBuf_open,
2864 PerlIOBase_binmode,
2865 PerlIOCede_getarg,
2866 PerlIOBase_fileno,
2867 PerlIOBuf_dup,
2868 PerlIOBuf_read,
2869 PerlIOBuf_unread,
2870 PerlIOBuf_write,
2871 PerlIOBuf_seek,
2872 PerlIOBuf_tell,
2873 PerlIOBuf_close,
2874 PerlIOCede_flush,
2875 PerlIOBuf_fill,
2876 PerlIOBase_eof,
2877 PerlIOBase_error,
2878 PerlIOBase_clearerr,
2879 PerlIOBase_setlinebuf,
2880 PerlIOBuf_get_base,
2881 PerlIOBuf_bufsiz,
2882 PerlIOBuf_get_ptr,
2883 PerlIOBuf_get_cnt,
2884 PerlIOBuf_set_ptrcnt,
2885};
2886
2887/*****************************************************************************/
2888/* Coro::Semaphore & Coro::Signal */
2889
2890static SV *
2891coro_waitarray_new (pTHX_ int count)
2892{
2893 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2894 AV *av = newAV ();
2895 SV **ary;
2896
2897 /* unfortunately, building manually saves memory */
2898 Newx (ary, 2, SV *);
2899 AvALLOC (av) = ary;
2900#if PERL_VERSION_ATLEAST (5,10,0)
2901 AvARRAY (av) = ary;
2902#else
2903 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2904 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2905 SvPVX ((SV *)av) = (char *)ary;
2906#endif
2907 AvMAX (av) = 1;
2908 AvFILLp (av) = 0;
2909 ary [0] = newSViv (count);
2910
2911 return newRV_noinc ((SV *)av);
2912}
2913
2914/* semaphore */
2915
2916static void
2917coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2918{
2919 SV *count_sv = AvARRAY (av)[0];
2920 IV count = SvIVX (count_sv);
2921
2922 count += adjust;
2923 SvIVX (count_sv) = count;
2924
2925 /* now wake up as many waiters as are expected to lock */
2926 while (count > 0 && AvFILLp (av) > 0)
2927 {
2928 SV *cb;
2929
2930 /* swap first two elements so we can shift a waiter */
2931 AvARRAY (av)[0] = AvARRAY (av)[1];
2932 AvARRAY (av)[1] = count_sv;
2933 cb = av_shift (av);
2934
2935 if (SvOBJECT (cb))
2936 {
2937 api_ready (aTHX_ cb);
2938 --count;
2939 }
2940 else if (SvTYPE (cb) == SVt_PVCV)
1102 { 2941 {
1103 dSP; 2942 dSP;
1104 UNLOCK;
1105
1106 ENTER;
1107 SAVETMPS;
1108
1109 PUSHMARK (SP); 2943 PUSHMARK (SP);
2944 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1110 PUTBACK; 2945 PUTBACK;
1111 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2946 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1112
1113 FREETMPS;
1114 LEAVE;
1115 continue;
1116 } 2947 }
1117 2948
1118 ta->next = SvSTATE (next_sv); 2949 SvREFCNT_dec (cb);
2950 }
2951}
1119 2952
1120 /* cannot transfer to destroyed coros, skip and look for next */ 2953static void
1121 if (ta->next->flags & CF_DESTROYED) 2954coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2955{
2956 /* call $sem->adjust (0) to possibly wake up some other waiters */
2957 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2958}
2959
2960static int
2961slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2962{
2963 AV *av = (AV *)frame->data;
2964 SV *count_sv = AvARRAY (av)[0];
2965 SV *coro_hv = SvRV (coro_current);
2966
2967 /* if we are about to throw, don't actually acquire the lock, just throw */
2968 if (CORO_THROW)
2969 return 0;
2970 else if (SvIVX (count_sv) > 0)
2971 {
2972 frame->destroy = 0;
2973
2974 if (acquire)
2975 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2976 else
2977 coro_semaphore_adjust (aTHX_ av, 0);
2978
2979 return 0;
2980 }
2981 else
2982 {
2983 int i;
2984 /* if we were woken up but can't down, we look through the whole */
2985 /* waiters list and only add us if we aren't in there already */
2986 /* this avoids some degenerate memory usage cases */
2987 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2988 if (AvARRAY (av)[i] == coro_hv)
2989 return 1;
2990
2991 av_push (av, SvREFCNT_inc (coro_hv));
2992 return 1;
2993 }
2994}
2995
2996static int
2997slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2998{
2999 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3000}
3001
3002static int
3003slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3004{
3005 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3006}
3007
3008static void
3009slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3010{
3011 AV *av = (AV *)SvRV (arg [0]);
3012
3013 if (SvIVX (AvARRAY (av)[0]) > 0)
3014 {
3015 frame->data = (void *)av;
3016 frame->prepare = prepare_nop;
3017 }
3018 else
3019 {
3020 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3021
3022 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3023 frame->prepare = prepare_schedule;
3024 /* to avoid race conditions when a woken-up coro gets terminated */
3025 /* we arrange for a temporary on_destroy that calls adjust (0) */
3026 frame->destroy = coro_semaphore_destroy;
3027 }
3028}
3029
3030static void
3031slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3032{
3033 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3034 frame->check = slf_check_semaphore_down;
3035}
3036
3037static void
3038slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3039{
3040 if (items >= 2)
3041 {
3042 /* callback form */
3043 AV *av = (AV *)SvRV (arg [0]);
3044 SV *cb_cv = s_get_cv_croak (arg [1]);
3045
3046 av_push (av, SvREFCNT_inc_NN (cb_cv));
3047
3048 if (SvIVX (AvARRAY (av)[0]) > 0)
3049 coro_semaphore_adjust (aTHX_ av, 0);
3050
3051 frame->prepare = prepare_nop;
3052 frame->check = slf_check_nop;
3053 }
3054 else
3055 {
3056 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3057 frame->check = slf_check_semaphore_wait;
3058 }
3059}
3060
3061/* signal */
3062
3063static void
3064coro_signal_wake (pTHX_ AV *av, int count)
3065{
3066 SvIVX (AvARRAY (av)[0]) = 0;
3067
3068 /* now signal count waiters */
3069 while (count > 0 && AvFILLp (av) > 0)
3070 {
3071 SV *cb;
3072
3073 /* swap first two elements so we can shift a waiter */
3074 cb = AvARRAY (av)[0];
3075 AvARRAY (av)[0] = AvARRAY (av)[1];
3076 AvARRAY (av)[1] = cb;
3077
3078 cb = av_shift (av);
3079
3080 if (SvTYPE (cb) == SVt_PVCV)
1122 { 3081 {
3082 dSP;
3083 PUSHMARK (SP);
3084 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1123 UNLOCK; 3085 PUTBACK;
1124 SvREFCNT_dec (next_sv); 3086 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1125 /* coro_nready is already taken care of by destroy */
1126 continue;
1127 } 3087 }
3088 else
3089 {
3090 api_ready (aTHX_ cb);
3091 sv_setiv (cb, 0); /* signal waiter */
3092 }
1128 3093
1129 --coro_nready; 3094 SvREFCNT_dec (cb);
1130 UNLOCK;
1131 break;
1132 }
1133 3095
1134 /* free this only after the transfer */ 3096 --count;
1135 prev_sv = SvRV (coro_current); 3097 }
1136 SvRV_set (coro_current, next_sv);
1137 ta->prev = SvSTATE (prev_sv);
1138
1139 assert (ta->next->flags & CF_READY);
1140 ta->next->flags &= ~CF_READY;
1141
1142 LOCK;
1143 free_coro_mortal (aTHX);
1144 coro_mortal = prev_sv;
1145 UNLOCK;
1146}
1147
1148static void
1149prepare_cede (pTHX_ struct transfer_args *ta)
1150{
1151 api_ready (coro_current);
1152 prepare_schedule (aTHX_ ta);
1153} 3098}
1154 3099
1155static int 3100static int
1156prepare_cede_notself (pTHX_ struct transfer_args *ta) 3101slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1157{ 3102{
1158 if (coro_nready) 3103 /* if we are about to throw, also stop waiting */
3104 return SvROK ((SV *)frame->data) && !CORO_THROW;
3105}
3106
3107static void
3108slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3109{
3110 AV *av = (AV *)SvRV (arg [0]);
3111
3112 if (items >= 2)
3113 {
3114 SV *cb_cv = s_get_cv_croak (arg [1]);
3115 av_push (av, SvREFCNT_inc_NN (cb_cv));
3116
3117 if (SvIVX (AvARRAY (av)[0]))
3118 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3119
3120 frame->prepare = prepare_nop;
3121 frame->check = slf_check_nop;
1159 { 3122 }
1160 SV *prev = SvRV (coro_current); 3123 else if (SvIVX (AvARRAY (av)[0]))
1161 prepare_schedule (aTHX_ ta); 3124 {
1162 api_ready (prev); 3125 SvIVX (AvARRAY (av)[0]) = 0;
1163 return 1; 3126 frame->prepare = prepare_nop;
3127 frame->check = slf_check_nop;
1164 } 3128 }
1165 else 3129 else
3130 {
3131 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3132
3133 av_push (av, waiter);
3134
3135 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3136 frame->prepare = prepare_schedule;
3137 frame->check = slf_check_signal_wait;
3138 }
3139}
3140
3141/*****************************************************************************/
3142/* Coro::AIO */
3143
3144#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3145
3146/* helper storage struct */
3147struct io_state
3148{
3149 int errorno;
3150 I32 laststype; /* U16 in 5.10.0 */
3151 int laststatval;
3152 Stat_t statcache;
3153};
3154
3155static void
3156coro_aio_callback (pTHX_ CV *cv)
3157{
3158 dXSARGS;
3159 AV *state = (AV *)S_GENSUB_ARG;
3160 SV *coro = av_pop (state);
3161 SV *data_sv = newSV (sizeof (struct io_state));
3162
3163 av_extend (state, items - 1);
3164
3165 sv_upgrade (data_sv, SVt_PV);
3166 SvCUR_set (data_sv, sizeof (struct io_state));
3167 SvPOK_only (data_sv);
3168
3169 {
3170 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3171
3172 data->errorno = errno;
3173 data->laststype = PL_laststype;
3174 data->laststatval = PL_laststatval;
3175 data->statcache = PL_statcache;
3176 }
3177
3178 /* now build the result vector out of all the parameters and the data_sv */
3179 {
3180 int i;
3181
3182 for (i = 0; i < items; ++i)
3183 av_push (state, SvREFCNT_inc_NN (ST (i)));
3184 }
3185
3186 av_push (state, data_sv);
3187
3188 api_ready (aTHX_ coro);
3189 SvREFCNT_dec (coro);
3190 SvREFCNT_dec ((AV *)state);
3191}
3192
3193static int
3194slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3195{
3196 AV *state = (AV *)frame->data;
3197
3198 /* if we are about to throw, return early */
3199 /* this does not cancel the aio request, but at least */
3200 /* it quickly returns */
3201 if (CORO_THROW)
1166 return 0; 3202 return 0;
1167}
1168 3203
1169static void 3204 /* one element that is an RV? repeat! */
1170api_schedule (void) 3205 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
1171{
1172 dTHX;
1173 struct transfer_args ta;
1174
1175 prepare_schedule (aTHX_ &ta);
1176 TRANSFER (ta);
1177}
1178
1179static int
1180api_cede (void)
1181{
1182 dTHX;
1183 struct transfer_args ta;
1184
1185 prepare_cede (aTHX_ &ta);
1186
1187 if (ta.prev != ta.next)
1188 {
1189 TRANSFER (ta);
1190 return 1; 3206 return 1;
3207
3208 /* restore status */
3209 {
3210 SV *data_sv = av_pop (state);
3211 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3212
3213 errno = data->errorno;
3214 PL_laststype = data->laststype;
3215 PL_laststatval = data->laststatval;
3216 PL_statcache = data->statcache;
3217
3218 SvREFCNT_dec (data_sv);
1191 } 3219 }
1192 else 3220
3221 /* push result values */
3222 {
3223 dSP;
3224 int i;
3225
3226 EXTEND (SP, AvFILLp (state) + 1);
3227 for (i = 0; i <= AvFILLp (state); ++i)
3228 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3229
3230 PUTBACK;
3231 }
3232
1193 return 0; 3233 return 0;
1194} 3234}
1195 3235
1196static int 3236static void
1197api_cede_notself (void) 3237slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1198{ 3238{
1199 dTHX; 3239 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
1200 struct transfer_args ta; 3240 SV *coro_hv = SvRV (coro_current);
3241 struct coro *coro = SvSTATE_hv (coro_hv);
1201 3242
1202 if (prepare_cede_notself (aTHX_ &ta)) 3243 /* put our coroutine id on the state arg */
1203 { 3244 av_push (state, SvREFCNT_inc_NN (coro_hv));
1204 TRANSFER (ta); 3245
1205 return 1; 3246 /* first see whether we have a non-zero priority and set it as AIO prio */
3247 if (coro->prio)
1206 } 3248 {
1207 else 3249 dSP;
1208 return 0;
1209}
1210 3250
3251 static SV *prio_cv;
3252 static SV *prio_sv;
3253
3254 if (ecb_expect_false (!prio_cv))
3255 {
3256 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3257 prio_sv = newSViv (0);
3258 }
3259
3260 PUSHMARK (SP);
3261 sv_setiv (prio_sv, coro->prio);
3262 XPUSHs (prio_sv);
3263
3264 PUTBACK;
3265 call_sv (prio_cv, G_VOID | G_DISCARD);
3266 }
3267
3268 /* now call the original request */
3269 {
3270 dSP;
3271 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3272 int i;
3273
3274 PUSHMARK (SP);
3275
3276 /* first push all args to the stack */
3277 EXTEND (SP, items + 1);
3278
3279 for (i = 0; i < items; ++i)
3280 PUSHs (arg [i]);
3281
3282 /* now push the callback closure */
3283 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3284
3285 /* now call the AIO function - we assume our request is uncancelable */
3286 PUTBACK;
3287 call_sv ((SV *)req, G_VOID | G_DISCARD);
3288 }
3289
3290 /* now that the request is going, we loop till we have a result */
3291 frame->data = (void *)state;
3292 frame->prepare = prepare_schedule;
3293 frame->check = slf_check_aio_req;
3294}
3295
3296static void
3297coro_aio_req_xs (pTHX_ CV *cv)
3298{
3299 dXSARGS;
3300
3301 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3302
3303 XSRETURN_EMPTY;
3304}
3305
3306/*****************************************************************************/
3307
3308#if CORO_CLONE
3309# include "clone.c"
3310#endif
3311
3312/*****************************************************************************/
3313
3314static SV *
3315coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3316{
3317 SV *coro_sv;
3318 struct coro *coro;
3319 MAGIC *mg;
3320 HV *hv;
3321 SV *cb;
3322 int i;
3323
3324 if (argc > 0)
3325 {
3326 cb = s_get_cv_croak (argv [0]);
3327
3328 if (!is_coro)
3329 {
3330 if (CvISXSUB (cb))
3331 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3332
3333 if (!CvROOT (cb))
3334 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3335 }
3336 }
3337
3338 Newz (0, coro, 1, struct coro);
3339 coro->args = newAV ();
3340 coro->flags = CF_NEW;
3341
3342 if (coro_first) coro_first->prev = coro;
3343 coro->next = coro_first;
3344 coro_first = coro;
3345
3346 coro->hv = hv = newHV ();
3347 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3348 mg->mg_flags |= MGf_DUP;
3349 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3350
3351 if (argc > 0)
3352 {
3353 av_extend (coro->args, argc + is_coro - 1);
3354
3355 if (is_coro)
3356 {
3357 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3358 cb = (SV *)cv_coro_run;
3359 }
3360
3361 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3362
3363 for (i = 1; i < argc; i++)
3364 av_push (coro->args, newSVsv (argv [i]));
3365 }
3366
3367 return coro_sv;
3368}
3369
3370#ifndef __cplusplus
3371ecb_cold XS(boot_Coro__State);
3372#endif
3373
3374#if CORO_JIT
3375
3376static void ecb_noinline ecb_cold
3377pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3378{
3379 dSP;
3380 AV *av = newAV ();
3381
3382 av_store (av, 3, newSVuv (d));
3383 av_store (av, 2, newSVuv (c));
3384 av_store (av, 1, newSVuv (b));
3385 av_store (av, 0, newSVuv (a));
3386
3387 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3388
3389 PUTBACK;
3390}
3391
3392static void ecb_noinline ecb_cold
3393jit_init (pTHX)
3394{
3395 dSP;
3396 SV *load, *save;
3397 char *map_base;
3398 char *load_ptr, *save_ptr;
3399 STRLEN load_len, save_len, map_len;
3400 int count;
3401
3402 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3403
3404 PUSHMARK (SP);
3405 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3406 #include "state.h"
3407 count = call_pv ("Coro::State::_jit", G_ARRAY);
3408 SPAGAIN;
3409
3410 save = POPs; save_ptr = SvPVbyte (save, save_len);
3411 load = POPs; load_ptr = SvPVbyte (load, load_len);
3412
3413 map_len = load_len + save_len + 16;
3414
3415 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3416
3417 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3418
3419 load_perl_slots = (load_save_perl_slots_type)map_base;
3420 memcpy (map_base, load_ptr, load_len);
3421
3422 map_base += (load_len + 15) & ~15;
3423
3424 save_perl_slots = (load_save_perl_slots_type)map_base;
3425 memcpy (map_base, save_ptr, save_len);
3426
3427 /* we are good citizens and try to make the page read-only, so the evil evil */
3428 /* hackers might have it a bit more difficult */
3429 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3430
3431 PUTBACK;
3432 eval_pv ("undef &Coro::State::_jit", 1);
3433}
3434
3435#endif
3436
1211MODULE = Coro::State PACKAGE = Coro::State 3437MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1212 3438
1213PROTOTYPES: DISABLE 3439PROTOTYPES: DISABLE
1214 3440
1215BOOT: 3441BOOT:
1216{ 3442{
1217#ifdef USE_ITHREADS 3443#ifdef USE_ITHREADS
1218 MUTEX_INIT (&coro_mutex); 3444# if CORO_PTHREAD
3445 coro_thx = PERL_GET_CONTEXT;
1219#endif 3446# endif
1220 BOOT_PAGESIZE; 3447#endif
3448 /* perl defines these to check for existance first, but why it doesn't */
3449 /* just create them one at init time is not clear to me, except for */
3450 /* programs trying to delete them, but... */
3451 /* anyway, we declare this as invalid and make sure they are initialised here */
3452 DEFSV;
3453 ERRSV;
3454
3455 cctx_current = cctx_new_empty ();
3456
3457 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3458 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3459
3460 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3461 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3462 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3463
3464 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3465 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3466 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1221 3467
1222 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3468 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1223 3469
1224 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3470 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1225 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 3471 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1226 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1227 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1228 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1229 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 3472 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1230 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3473 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1231 3474
1232 main_mainstack = PL_mainstack; 3475 main_mainstack = PL_mainstack;
1233 main_top_env = PL_top_env; 3476 main_top_env = PL_top_env;
1234 3477
1235 while (main_top_env->je_prev) 3478 while (main_top_env->je_prev)
1236 main_top_env = main_top_env->je_prev; 3479 main_top_env = main_top_env->je_prev;
1237 3480
3481 {
3482 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3483
3484 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3485 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3486
3487 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3488 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3489 }
3490
1238 coroapi.ver = CORO_API_VERSION; 3491 coroapi.ver = CORO_API_VERSION;
3492 coroapi.rev = CORO_API_REVISION;
3493
1239 coroapi.transfer = api_transfer; 3494 coroapi.transfer = api_transfer;
1240 3495
3496 coroapi.sv_state = SvSTATE_;
3497 coroapi.execute_slf = api_execute_slf;
3498 coroapi.prepare_nop = prepare_nop;
3499 coroapi.prepare_schedule = prepare_schedule;
3500 coroapi.prepare_cede = prepare_cede;
3501 coroapi.prepare_cede_notself = prepare_cede_notself;
3502
3503 time_init (aTHX);
3504
1241 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3505 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3506#if CORO_JIT
3507 PUTBACK;
3508 jit_init (aTHX);
3509 SPAGAIN;
3510#endif
1242} 3511}
1243 3512
1244SV * 3513SV *
1245new (char *klass, ...) 3514new (SV *klass, ...)
3515 ALIAS:
3516 Coro::new = 1
1246 CODE: 3517 CODE:
1247{ 3518 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1248 struct coro *coro;
1249 HV *hv;
1250 int i;
1251
1252 Newz (0, coro, 1, struct coro);
1253 coro->args = newAV ();
1254 coro->save = CORO_SAVE_DEF;
1255 coro->flags = CF_NEW;
1256
1257 if (coro_first) coro_first->prev = coro;
1258 coro->next = coro_first;
1259 coro_first = coro;
1260
1261 coro->hv = hv = newHV ();
1262 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1263 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1264
1265 for (i = 1; i < items; i++)
1266 av_push (coro->args, newSVsv (ST (i)));
1267}
1268 OUTPUT:
1269 RETVAL
1270
1271int
1272save (SV *coro, int new_save = -1)
1273 CODE:
1274 RETVAL = api_save (coro, new_save);
1275 OUTPUT: 3519 OUTPUT:
1276 RETVAL 3520 RETVAL
1277 3521
1278int 3522void
1279save_also (SV *coro_sv, int save_also) 3523transfer (...)
3524 PROTOTYPE: $$
1280 CODE: 3525 CODE:
3526 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3527
3528SV *
3529clone (Coro::State coro)
3530 CODE:
1281{ 3531{
1282 struct coro *coro = SvSTATE (coro_sv); 3532#if CORO_CLONE
1283 RETVAL = coro->save; 3533 struct coro *ncoro = coro_clone (aTHX_ coro);
1284 coro->save |= save_also; 3534 MAGIC *mg;
3535 /* TODO: too much duplication */
3536 ncoro->hv = newHV ();
3537 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3538 mg->mg_flags |= MGf_DUP;
3539 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3540#else
3541 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3542#endif
1285} 3543}
1286 OUTPUT: 3544 OUTPUT:
1287 RETVAL 3545 RETVAL
1288 3546
1289void 3547int
1290_set_stacklevel (...) 3548cctx_stacksize (int new_stacksize = 0)
1291 ALIAS: 3549 PROTOTYPE: ;$
1292 Coro::State::transfer = 1 3550 CODE:
1293 Coro::schedule = 2 3551 RETVAL = cctx_stacksize;
1294 Coro::cede = 3 3552 if (new_stacksize)
1295 Coro::cede_notself = 4
1296 CODE:
1297{
1298 struct transfer_args ta;
1299
1300 switch (ix)
1301 { 3553 {
1302 case 0: 3554 cctx_stacksize = new_stacksize;
1303 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 3555 ++cctx_gen;
1304 ta.next = 0;
1305 break;
1306
1307 case 1:
1308 if (items != 2)
1309 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1310
1311 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1312 break;
1313
1314 case 2:
1315 prepare_schedule (aTHX_ &ta);
1316 break;
1317
1318 case 3:
1319 prepare_cede (aTHX_ &ta);
1320 break;
1321
1322 case 4:
1323 if (!prepare_cede_notself (aTHX_ &ta))
1324 XSRETURN_EMPTY;
1325
1326 break;
1327 } 3556 }
1328
1329 BARRIER;
1330 TRANSFER (ta);
1331
1332 if (GIMME_V != G_VOID && ta.next != ta.prev)
1333 XSRETURN_YES;
1334}
1335
1336bool
1337_destroy (SV *coro_sv)
1338 CODE:
1339 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1340 OUTPUT: 3557 OUTPUT:
1341 RETVAL 3558 RETVAL
1342 3559
1343void 3560int
1344_exit (code) 3561cctx_max_idle (int max_idle = 0)
1345 int code 3562 PROTOTYPE: ;$
1346 PROTOTYPE: $
1347 CODE: 3563 CODE:
1348 _exit (code); 3564 RETVAL = cctx_max_idle;
1349 3565 if (max_idle > 1)
1350int 3566 cctx_max_idle = max_idle;
1351cctx_stacksize (int new_stacksize = 0)
1352 CODE:
1353 RETVAL = coro_stacksize;
1354 if (new_stacksize)
1355 coro_stacksize = new_stacksize;
1356 OUTPUT: 3567 OUTPUT:
1357 RETVAL 3568 RETVAL
1358 3569
1359int 3570int
1360cctx_count () 3571cctx_count ()
3572 PROTOTYPE:
1361 CODE: 3573 CODE:
1362 RETVAL = cctx_count; 3574 RETVAL = cctx_count;
1363 OUTPUT: 3575 OUTPUT:
1364 RETVAL 3576 RETVAL
1365 3577
1366int 3578int
1367cctx_idle () 3579cctx_idle ()
3580 PROTOTYPE:
1368 CODE: 3581 CODE:
1369 RETVAL = cctx_idle; 3582 RETVAL = cctx_idle;
1370 OUTPUT: 3583 OUTPUT:
1371 RETVAL 3584 RETVAL
1372 3585
1373void 3586void
1374list () 3587list ()
3588 PROTOTYPE:
1375 PPCODE: 3589 PPCODE:
1376{ 3590{
1377 struct coro *coro; 3591 struct coro *coro;
1378 for (coro = coro_first; coro; coro = coro->next) 3592 for (coro = coro_first; coro; coro = coro->next)
1379 if (coro->hv) 3593 if (coro->hv)
1380 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3594 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1381} 3595}
1382 3596
… …
1384call (Coro::State coro, SV *coderef) 3598call (Coro::State coro, SV *coderef)
1385 ALIAS: 3599 ALIAS:
1386 eval = 1 3600 eval = 1
1387 CODE: 3601 CODE:
1388{ 3602{
1389 if (coro->mainstack) 3603 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1390 { 3604 {
1391 struct coro temp; 3605 struct coro *current = SvSTATE_current;
1392 Zero (&temp, 1, struct coro); 3606 struct CoroSLF slf_save;
1393 temp.save = CORO_SAVE_ALL;
1394 3607
1395 if (!(coro->flags & CF_RUNNING)) 3608 if (current != coro)
1396 { 3609 {
3610 PUTBACK;
1397 save_perl (aTHX_ &temp); 3611 save_perl (aTHX_ current);
1398 load_perl (aTHX_ coro); 3612 load_perl (aTHX_ coro);
3613 /* the coro is most likely in an active SLF call.
3614 * while not strictly required (the code we execute is
3615 * not allowed to call any SLF functions), it's cleaner
3616 * to reinitialise the slf_frame and restore it later.
3617 * This might one day allow us to actually do SLF calls
3618 * from code executed here.
3619 */
3620 slf_save = slf_frame;
3621 slf_frame.prepare = 0;
3622 SPAGAIN;
1399 } 3623 }
1400 3624
1401 { 3625 PUSHSTACK;
1402 dSP; 3626
1403 ENTER;
1404 SAVETMPS;
1405 PUSHMARK (SP); 3627 PUSHMARK (SP);
1406 PUTBACK; 3628 PUTBACK;
3629
1407 if (ix) 3630 if (ix)
1408 eval_sv (coderef, 0); 3631 eval_sv (coderef, 0);
1409 else 3632 else
1410 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3633 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3634
3635 POPSTACK;
1411 SPAGAIN; 3636 SPAGAIN;
1412 FREETMPS;
1413 LEAVE;
1414 PUTBACK;
1415 }
1416 3637
1417 if (!(coro->flags & CF_RUNNING)) 3638 if (current != coro)
1418 { 3639 {
3640 PUTBACK;
3641 slf_frame = slf_save;
1419 save_perl (aTHX_ coro); 3642 save_perl (aTHX_ coro);
1420 load_perl (aTHX_ &temp); 3643 load_perl (aTHX_ current);
3644 SPAGAIN;
1421 } 3645 }
1422 } 3646 }
1423} 3647}
1424 3648
1425SV * 3649SV *
1426is_ready (Coro::State coro) 3650is_ready (Coro::State coro)
1427 PROTOTYPE: $ 3651 PROTOTYPE: $
1428 ALIAS: 3652 ALIAS:
1429 is_ready = CF_READY 3653 is_ready = CF_READY
1430 is_running = CF_RUNNING 3654 is_running = CF_RUNNING
1431 is_new = CF_NEW 3655 is_new = CF_NEW
1432 is_destroyed = CF_DESTROYED 3656 is_destroyed = CF_ZOMBIE
3657 is_zombie = CF_ZOMBIE
3658 is_suspended = CF_SUSPENDED
1433 CODE: 3659 CODE:
1434 RETVAL = boolSV (coro->flags & ix); 3660 RETVAL = boolSV (coro->flags & ix);
1435 OUTPUT: 3661 OUTPUT:
1436 RETVAL 3662 RETVAL
1437 3663
3664void
3665throw (SV *self, SV *exception = &PL_sv_undef)
3666 PROTOTYPE: $;$
3667 CODE:
3668{
3669 struct coro *coro = SvSTATE (self);
3670 struct coro *current = SvSTATE_current;
3671 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3672 SvREFCNT_dec (*exceptionp);
3673 SvGETMAGIC (exception);
3674 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3675
3676 api_ready (aTHX_ self);
3677}
3678
3679void
3680api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3681 PROTOTYPE: $;$
3682 C_ARGS: aTHX_ coro, flags
3683
1438SV * 3684SV *
1439has_stack (Coro::State coro) 3685has_cctx (Coro::State coro)
1440 PROTOTYPE: $ 3686 PROTOTYPE: $
1441 CODE: 3687 CODE:
1442 RETVAL = boolSV (!!coro->cctx); 3688 /* maybe manage the running flag differently */
3689 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1443 OUTPUT: 3690 OUTPUT:
1444 RETVAL 3691 RETVAL
1445 3692
1446IV 3693int
3694is_traced (Coro::State coro)
3695 PROTOTYPE: $
3696 CODE:
3697 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3698 OUTPUT:
3699 RETVAL
3700
3701UV
1447rss (Coro::State coro) 3702rss (Coro::State coro)
1448 PROTOTYPE: $ 3703 PROTOTYPE: $
3704 ALIAS:
3705 usecount = 1
1449 CODE: 3706 CODE:
1450 RETVAL = coro_rss (coro); 3707 switch (ix)
3708 {
3709 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3710 case 1: RETVAL = coro->usecount; break;
3711 }
1451 OUTPUT: 3712 OUTPUT:
1452 RETVAL 3713 RETVAL
1453 3714
3715void
3716force_cctx ()
3717 PROTOTYPE:
3718 CODE:
3719 cctx_current->idle_sp = 0;
3720
3721void
3722swap_defsv (Coro::State self)
3723 PROTOTYPE: $
3724 ALIAS:
3725 swap_defav = 1
3726 CODE:
3727 if (!self->slot)
3728 croak ("cannot swap state with coroutine that has no saved state,");
3729 else
3730 {
3731 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3732 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3733
3734 SV *tmp = *src; *src = *dst; *dst = tmp;
3735 }
3736
3737void
3738cancel (Coro::State self)
3739 CODE:
3740 coro_state_destroy (aTHX_ self);
3741
3742SV *
3743enable_times (int enabled = enable_times)
3744 CODE:
3745{
3746 RETVAL = boolSV (enable_times);
3747
3748 if (enabled != enable_times)
3749 {
3750 enable_times = enabled;
3751
3752 coro_times_update ();
3753 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3754 }
3755}
3756 OUTPUT:
3757 RETVAL
3758
3759void
3760times (Coro::State self)
3761 PPCODE:
3762{
3763 struct coro *current = SvSTATE (coro_current);
3764
3765 if (ecb_expect_false (current == self))
3766 {
3767 coro_times_update ();
3768 coro_times_add (SvSTATE (coro_current));
3769 }
3770
3771 EXTEND (SP, 2);
3772 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3773 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3774
3775 if (ecb_expect_false (current == self))
3776 coro_times_sub (SvSTATE (coro_current));
3777}
3778
3779void
3780swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3781 CODE:
3782{
3783 struct coro *current = SvSTATE_current;
3784
3785 if (current == coro)
3786 SWAP_SVS (current);
3787
3788 if (!coro->swap_sv)
3789 coro->swap_sv = newAV ();
3790
3791 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3792 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3793
3794 if (current == coro)
3795 SWAP_SVS (current);
3796}
3797
1454 3798
1455MODULE = Coro::State PACKAGE = Coro 3799MODULE = Coro::State PACKAGE = Coro
1456 3800
1457BOOT: 3801BOOT:
1458{ 3802{
1459 int i;
1460
1461 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3803 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1462 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3804 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3805 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3806 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1463 av_async_pool = get_av ("Coro::async_pool", TRUE); 3807 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3808 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3809 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3810 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1464 3811
1465 coro_current = get_sv ("Coro::current", FALSE); 3812 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1466 SvREADONLY_on (coro_current); 3813 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3814 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3815 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
1467 3816
1468 coro_stash = gv_stashpv ("Coro", TRUE); 3817 coro_stash = gv_stashpv ("Coro", TRUE);
1469 3818
1470 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3819 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1471 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3820 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1472 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3821 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1473 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3822 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1474 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3823 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1475 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3824 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1476
1477 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1478 coro_ready[i] = newAV ();
1479 3825
1480 { 3826 {
1481 SV *sv = perl_get_sv("Coro::API", 1); 3827 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1482 3828
1483 coroapi.schedule = api_schedule; 3829 coroapi.schedule = api_schedule;
1484 coroapi.save = api_save; 3830 coroapi.schedule_to = api_schedule_to;
1485 coroapi.cede = api_cede; 3831 coroapi.cede = api_cede;
1486 coroapi.cede_notself = api_cede_notself; 3832 coroapi.cede_notself = api_cede_notself;
1487 coroapi.ready = api_ready; 3833 coroapi.ready = api_ready;
1488 coroapi.is_ready = api_is_ready; 3834 coroapi.is_ready = api_is_ready;
1489 coroapi.nready = &coro_nready; 3835 coroapi.nready = coro_nready;
1490 coroapi.current = coro_current; 3836 coroapi.current = coro_current;
1491 3837
1492 GCoroAPI = &coroapi; 3838 /*GCoroAPI = &coroapi;*/
1493 sv_setiv (sv, (IV)&coroapi); 3839 sv_setiv (sv, (IV)&coroapi);
1494 SvREADONLY_on (sv); 3840 SvREADONLY_on (sv);
1495 } 3841 }
1496} 3842}
3843
3844SV *
3845async (...)
3846 PROTOTYPE: &@
3847 CODE:
3848 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3849 api_ready (aTHX_ RETVAL);
3850 OUTPUT:
3851 RETVAL
3852
3853void
3854_destroy (Coro::State coro)
3855 CODE:
3856 /* used by the manager thread */
3857 coro_state_destroy (aTHX_ coro);
3858
3859void
3860on_destroy (Coro::State coro, SV *cb)
3861 CODE:
3862 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3863
3864void
3865join (...)
3866 CODE:
3867 CORO_EXECUTE_SLF_XS (slf_init_join);
3868
3869void
3870terminate (...)
3871 CODE:
3872 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3873
3874void
3875cancel (...)
3876 CODE:
3877 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3878
3879int
3880safe_cancel (Coro::State self, ...)
3881 C_ARGS: aTHX_ self, &ST (1), items - 1
3882
3883void
3884schedule (...)
3885 CODE:
3886 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3887
3888void
3889schedule_to (...)
3890 CODE:
3891 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3892
3893void
3894cede_to (...)
3895 CODE:
3896 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3897
3898void
3899cede (...)
3900 CODE:
3901 CORO_EXECUTE_SLF_XS (slf_init_cede);
3902
3903void
3904cede_notself (...)
3905 CODE:
3906 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1497 3907
1498void 3908void
1499_set_current (SV *current) 3909_set_current (SV *current)
1500 PROTOTYPE: $ 3910 PROTOTYPE: $
1501 CODE: 3911 CODE:
1502 SvREFCNT_dec (SvRV (coro_current)); 3912 SvREFCNT_dec (SvRV (coro_current));
1503 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3913 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3914
3915void
3916_set_readyhook (SV *hook)
3917 PROTOTYPE: $
3918 CODE:
3919 SvREFCNT_dec (coro_readyhook);
3920 SvGETMAGIC (hook);
3921 if (SvOK (hook))
3922 {
3923 coro_readyhook = newSVsv (hook);
3924 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3925 }
3926 else
3927 {
3928 coro_readyhook = 0;
3929 CORO_READYHOOK = 0;
3930 }
1504 3931
1505int 3932int
1506prio (Coro::State coro, int newprio = 0) 3933prio (Coro::State coro, int newprio = 0)
3934 PROTOTYPE: $;$
1507 ALIAS: 3935 ALIAS:
1508 nice = 1 3936 nice = 1
1509 CODE: 3937 CODE:
1510{ 3938{
1511 RETVAL = coro->prio; 3939 RETVAL = coro->prio;
… …
1513 if (items > 1) 3941 if (items > 1)
1514 { 3942 {
1515 if (ix) 3943 if (ix)
1516 newprio = coro->prio - newprio; 3944 newprio = coro->prio - newprio;
1517 3945
1518 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3946 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1519 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3947 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1520 3948
1521 coro->prio = newprio; 3949 coro->prio = newprio;
1522 } 3950 }
1523} 3951}
1524 OUTPUT: 3952 OUTPUT:
… …
1526 3954
1527SV * 3955SV *
1528ready (SV *self) 3956ready (SV *self)
1529 PROTOTYPE: $ 3957 PROTOTYPE: $
1530 CODE: 3958 CODE:
1531 RETVAL = boolSV (api_ready (self)); 3959 RETVAL = boolSV (api_ready (aTHX_ self));
1532 OUTPUT: 3960 OUTPUT:
1533 RETVAL 3961 RETVAL
1534 3962
1535int 3963int
1536nready (...) 3964nready (...)
… …
1538 CODE: 3966 CODE:
1539 RETVAL = coro_nready; 3967 RETVAL = coro_nready;
1540 OUTPUT: 3968 OUTPUT:
1541 RETVAL 3969 RETVAL
1542 3970
1543# for async_pool speedup
1544void 3971void
1545_pool_1 (SV *cb) 3972suspend (Coro::State self)
3973 PROTOTYPE: $
1546 CODE: 3974 CODE:
1547{ 3975 self->flags |= CF_SUSPENDED;
1548 int i, len;
1549 HV *hv = (HV *)SvRV (coro_current);
1550 AV *defav = GvAV (PL_defgv);
1551 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1552 AV *invoke_av;
1553 3976
1554 if (!invoke) 3977void
1555 croak ("\3terminate\2\n"); 3978resume (Coro::State self)
3979 PROTOTYPE: $
3980 CODE:
3981 self->flags &= ~CF_SUSPENDED;
1556 3982
1557 hv_store (hv, "desc", sizeof ("desc") - 1, 3983void
1558 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3984_pool_handler (...)
3985 CODE:
3986 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1559 3987
1560 invoke_av = (AV *)SvRV (invoke); 3988void
1561 len = av_len (invoke_av); 3989async_pool (SV *cv, ...)
3990 PROTOTYPE: &@
3991 PPCODE:
3992{
3993 HV *hv = (HV *)av_pop (av_async_pool);
3994 AV *av = newAV ();
3995 SV *cb = ST (0);
3996 int i;
1562 3997
1563 sv_setsv (cb, AvARRAY (invoke_av)[0]); 3998 av_extend (av, items - 2);
3999 for (i = 1; i < items; ++i)
4000 av_push (av, SvREFCNT_inc_NN (ST (i)));
1564 4001
1565 if (len > 0) 4002 if ((SV *)hv == &PL_sv_undef)
1566 { 4003 {
1567 av_fill (defav, len - 1); 4004 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1568 for (i = 0; i < len; ++i) 4005 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1569 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 4006 SvREFCNT_dec (sv);
1570 } 4007 }
1571 4008
4009 {
4010 struct coro *coro = SvSTATE_hv (hv);
4011
4012 assert (!coro->invoke_cb);
4013 assert (!coro->invoke_av);
4014 coro->invoke_cb = SvREFCNT_inc (cb);
4015 coro->invoke_av = av;
4016 }
4017
4018 api_ready (aTHX_ (SV *)hv);
4019
4020 if (GIMME_V != G_VOID)
4021 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4022 else
1572 SvREFCNT_dec (invoke); 4023 SvREFCNT_dec (hv);
1573} 4024}
1574 4025
1575void 4026SV *
1576_pool_2 (SV *cb) 4027rouse_cb ()
4028 PROTOTYPE:
1577 CODE: 4029 CODE:
1578{ 4030 RETVAL = coro_new_rouse_cb (aTHX);
1579 struct coro *coro = SvSTATE (coro_current);
1580
1581 sv_setsv (cb, &PL_sv_undef);
1582
1583 if (coro_rss (coro) > SvIV (sv_pool_rss)
1584 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1585 croak ("\3terminate\2\n");
1586
1587 av_clear (GvAV (PL_defgv));
1588 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1589 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1590 coro->save = CORO_SAVE_DEF;
1591 coro->prio = 0;
1592 av_push (av_async_pool, newSVsv (coro_current));
1593}
1594
1595
1596MODULE = Coro::State PACKAGE = Coro::AIO
1597
1598SV *
1599_get_state ()
1600 CODE:
1601{
1602 struct io_state *data;
1603
1604 RETVAL = newSV (sizeof (struct io_state));
1605 data = (struct io_state *)SvPVX (RETVAL);
1606 SvCUR_set (RETVAL, sizeof (struct io_state));
1607 SvPOK_only (RETVAL);
1608
1609 data->errorno = errno;
1610 data->laststype = PL_laststype;
1611 data->laststatval = PL_laststatval;
1612 data->statcache = PL_statcache;
1613}
1614 OUTPUT: 4031 OUTPUT:
1615 RETVAL 4032 RETVAL
1616 4033
1617void 4034void
1618_set_state (char *data_) 4035rouse_wait (...)
4036 PROTOTYPE: ;$
4037 PPCODE:
4038 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4039
4040void
4041on_enter (SV *block)
4042 ALIAS:
4043 on_leave = 1
1619 PROTOTYPE: $ 4044 PROTOTYPE: &
1620 CODE: 4045 CODE:
1621{ 4046{
1622 struct io_state *data = (void *)data_; 4047 struct coro *coro = SvSTATE_current;
4048 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1623 4049
1624 errno = data->errorno; 4050 block = s_get_cv_croak (block);
1625 PL_laststype = data->laststype;
1626 PL_laststatval = data->laststatval;
1627 PL_statcache = data->statcache;
1628}
1629 4051
4052 if (!*avp)
4053 *avp = newAV ();
4054
4055 av_push (*avp, SvREFCNT_inc (block));
4056
4057 if (!ix)
4058 on_enterleave_call (aTHX_ block);
4059
4060 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4061 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4062 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4063}
4064
4065
4066MODULE = Coro::State PACKAGE = PerlIO::cede
4067
4068BOOT:
4069 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4070
4071
4072MODULE = Coro::State PACKAGE = Coro::Semaphore
4073
4074SV *
4075new (SV *klass, SV *count = 0)
4076 CODE:
4077{
4078 int semcnt = 1;
4079
4080 if (count)
4081 {
4082 SvGETMAGIC (count);
4083
4084 if (SvOK (count))
4085 semcnt = SvIV (count);
4086 }
4087
4088 RETVAL = sv_bless (
4089 coro_waitarray_new (aTHX_ semcnt),
4090 GvSTASH (CvGV (cv))
4091 );
4092}
4093 OUTPUT:
4094 RETVAL
4095
4096# helper for Coro::Channel and others
4097SV *
4098_alloc (int count)
4099 CODE:
4100 RETVAL = coro_waitarray_new (aTHX_ count);
4101 OUTPUT:
4102 RETVAL
4103
4104SV *
4105count (SV *self)
4106 CODE:
4107 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4108 OUTPUT:
4109 RETVAL
4110
4111void
4112up (SV *self, int adjust = 1)
4113 ALIAS:
4114 adjust = 1
4115 CODE:
4116 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4117
4118void
4119down (...)
4120 CODE:
4121 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4122
4123void
4124wait (...)
4125 CODE:
4126 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4127
4128void
4129try (SV *self)
4130 PPCODE:
4131{
4132 AV *av = (AV *)SvRV (self);
4133 SV *count_sv = AvARRAY (av)[0];
4134 IV count = SvIVX (count_sv);
4135
4136 if (count > 0)
4137 {
4138 --count;
4139 SvIVX (count_sv) = count;
4140 XSRETURN_YES;
4141 }
4142 else
4143 XSRETURN_NO;
4144}
4145
4146void
4147waiters (SV *self)
4148 PPCODE:
4149{
4150 AV *av = (AV *)SvRV (self);
4151 int wcount = AvFILLp (av) + 1 - 1;
4152
4153 if (GIMME_V == G_SCALAR)
4154 XPUSHs (sv_2mortal (newSViv (wcount)));
4155 else
4156 {
4157 int i;
4158 EXTEND (SP, wcount);
4159 for (i = 1; i <= wcount; ++i)
4160 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4161 }
4162}
4163
4164MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4165
4166void
4167_may_delete (SV *sem, int count, unsigned int extra_refs)
4168 PPCODE:
4169{
4170 AV *av = (AV *)SvRV (sem);
4171
4172 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4173 && AvFILLp (av) == 0 /* no waiters, just count */
4174 && SvIV (AvARRAY (av)[0]) == count)
4175 XSRETURN_YES;
4176
4177 XSRETURN_NO;
4178}
4179
4180MODULE = Coro::State PACKAGE = Coro::Signal
4181
4182SV *
4183new (SV *klass)
4184 CODE:
4185 RETVAL = sv_bless (
4186 coro_waitarray_new (aTHX_ 0),
4187 GvSTASH (CvGV (cv))
4188 );
4189 OUTPUT:
4190 RETVAL
4191
4192void
4193wait (...)
4194 CODE:
4195 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4196
4197void
4198broadcast (SV *self)
4199 CODE:
4200{
4201 AV *av = (AV *)SvRV (self);
4202 coro_signal_wake (aTHX_ av, AvFILLp (av));
4203}
4204
4205void
4206send (SV *self)
4207 CODE:
4208{
4209 AV *av = (AV *)SvRV (self);
4210
4211 if (AvFILLp (av))
4212 coro_signal_wake (aTHX_ av, 1);
4213 else
4214 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4215}
4216
4217IV
4218awaited (SV *self)
4219 CODE:
4220 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4221 OUTPUT:
4222 RETVAL
4223
4224
4225MODULE = Coro::State PACKAGE = Coro::AnyEvent
4226
4227BOOT:
4228 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4229
4230void
4231_schedule (...)
4232 CODE:
4233{
4234 static int incede;
4235
4236 api_cede_notself (aTHX);
4237
4238 ++incede;
4239 while (coro_nready >= incede && api_cede (aTHX))
4240 ;
4241
4242 sv_setsv (sv_activity, &PL_sv_undef);
4243 if (coro_nready >= incede)
4244 {
4245 PUSHMARK (SP);
4246 PUTBACK;
4247 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4248 }
4249
4250 --incede;
4251}
4252
4253
4254MODULE = Coro::State PACKAGE = Coro::AIO
4255
4256void
4257_register (char *target, char *proto, SV *req)
4258 CODE:
4259{
4260 SV *req_cv = s_get_cv_croak (req);
4261 /* newXSproto doesn't return the CV on 5.8 */
4262 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4263 sv_setpv ((SV *)slf_cv, proto);
4264 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4265}
4266
4267MODULE = Coro::State PACKAGE = Coro::Select
4268
4269void
4270patch_pp_sselect ()
4271 CODE:
4272 if (!coro_old_pp_sselect)
4273 {
4274 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4275 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4276 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4277 }
4278
4279void
4280unpatch_pp_sselect ()
4281 CODE:
4282 if (coro_old_pp_sselect)
4283 {
4284 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4285 coro_old_pp_sselect = 0;
4286 }
4287
4288MODULE = Coro::State PACKAGE = Coro::Util
4289
4290void
4291_exit (int code)
4292 CODE:
4293 _exit (code);
4294
4295NV
4296time ()
4297 CODE:
4298 RETVAL = nvtime (aTHX);
4299 OUTPUT:
4300 RETVAL
4301
4302NV
4303gettimeofday ()
4304 PPCODE:
4305{
4306 UV tv [2];
4307 u2time (aTHX_ tv);
4308 EXTEND (SP, 2);
4309 PUSHs (sv_2mortal (newSVuv (tv [0])));
4310 PUSHs (sv_2mortal (newSVuv (tv [1])));
4311}
4312

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