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Comparing Coro/Coro/State.xs (file contents):
Revision 1.162 by root, Sun Sep 23 21:49:58 2007 UTC vs.
Revision 1.434 by root, Sat Nov 2 19:48:50 2013 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#include "ecb.h"
20
21#include <stddef.h>
11#include <stdio.h> 22#include <stdio.h>
12#include <errno.h> 23#include <errno.h>
13#include <assert.h> 24#include <assert.h>
14 25
15#ifdef HAVE_MMAP 26#ifndef SVs_PADSTALE
16# include <unistd.h> 27# 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 28#endif
29
30#ifdef PadARRAY
31# define NEWPADAPI 1
32# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
33#else
34typedef AV PADNAMELIST;
35# if !PERL_VERSION_ATLEAST(5,8,0)
36typedef AV PADLIST;
37typedef AV PAD;
24# endif 38# endif
25# include <limits.h> 39# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
26# ifndef PAGESIZE 40# define PadlistMAX(pl) AvFILLp (pl)
27# define PAGESIZE pagesize 41# define PadlistNAMES(pl) (*PadlistARRAY (pl))
28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 42# define PadARRAY AvARRAY
29static long pagesize; 43# define PadMAX AvFILLp
30# else 44# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
31# define BOOT_PAGESIZE (void)0
32# endif 45#endif
46
47#if defined(_WIN32)
48# undef HAS_GETTIMEOFDAY
49# undef setjmp
50# undef longjmp
51# undef _exit
52# define setjmp _setjmp /* deep magic */
33#else 53#else
34# define PAGESIZE 0 54# 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 55#endif
44 56
45/* the maximum number of idle cctx that will be pooled */ 57/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 58static int cctx_max_idle = 4;
47 59
48#define PERL_VERSION_ATLEAST(a,b,c) \ 60#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
49 (PERL_REVISION > (a) \ 61# 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 62#endif
87 63
88/* prefer perl internal functions over our own? */ 64/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 65#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 66# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 67#endif
92 68
93/* The next macros try to return the current stack pointer, in an as 69/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */ 70 * 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 71#if __GNUC__ >= 4
101# define attribute(x) __attribute__(x) 72# define dSTACKLEVEL int stacklevel_dummy
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 73# define STACKLEVEL __builtin_frame_address (0)
103#else 74#else
104# define attribute(x) 75# define dSTACKLEVEL volatile void *stacklevel
105# define BARRIER 76# define STACKLEVEL ((void *)&stacklevel)
106#endif 77#endif
107 78
108#define NOINLINE attribute ((noinline)) 79#define IN_DESTRUCT PL_dirty
109 80
110#include "CoroAPI.h" 81#include "CoroAPI.h"
82#define GCoroAPI (&coroapi) /* very sneaky */
111 83
112#ifdef USE_ITHREADS 84#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 85# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 86static 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 87# endif
88#endif
120 89
121/* helper storage struct for Coro::AIO */ 90#ifdef __linux
122struct io_state 91# include <time.h> /* for timespec */
123{ 92# include <syscall.h> /* for SYS_* */
124 int errorno; 93# ifdef SYS_clock_gettime
125 I32 laststype; 94# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
126 int laststatval; 95# define CORO_CLOCK_MONOTONIC 1
127 Stat_t statcache; 96# define CORO_CLOCK_THREAD_CPUTIME_ID 3
128}; 97# endif
98#endif
129 99
100static double (*nvtime)(); /* so why doesn't it take void? */
101static void (*u2time)(pTHX_ UV ret[2]);
102
103/* we hijack an hopefully unused CV flag for our purposes */
104#define CVf_SLF 0x4000
105static OP *pp_slf (pTHX);
106static void slf_destroy (pTHX_ struct coro *coro);
107
108static U32 cctx_gen;
130static size_t coro_stacksize = CORO_STACKSIZE; 109static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 110static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 111static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 112static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 113static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 114static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
115
116static AV *av_destroy; /* destruction queue */
117static SV *sv_manager; /* the manager coro */
118static SV *sv_idle; /* $Coro::idle */
119
120static GV *irsgv; /* $/ */
121static GV *stdoutgv; /* *STDOUT */
122static SV *rv_diehook;
123static SV *rv_warnhook;
124static HV *hv_sig; /* %SIG */
136 125
137/* async_pool helper stuff */ 126/* async_pool helper stuff */
138static SV *sv_pool_rss; 127static SV *sv_pool_rss;
139static SV *sv_pool_size; 128static SV *sv_pool_size;
129static SV *sv_async_pool_idle; /* description string */
140static AV *av_async_pool; 130static AV *av_async_pool; /* idle pool */
131static SV *sv_Coro; /* class string */
132static CV *cv_pool_handler;
133
134/* Coro::AnyEvent */
135static SV *sv_activity;
136
137/* enable processtime/realtime profiling */
138static char enable_times;
139typedef U32 coro_ts[2];
140static coro_ts time_real, time_cpu;
141static char times_valid;
141 142
142static struct coro_cctx *cctx_first; 143static struct coro_cctx *cctx_first;
143static int cctx_count, cctx_idle; 144static int cctx_count, cctx_idle;
144 145
146enum
147{
148 CC_MAPPED = 0x01,
149 CC_NOREUSE = 0x02, /* throw this away after tracing */
150 CC_TRACE = 0x04,
151 CC_TRACE_SUB = 0x08, /* trace sub calls */
152 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154};
155
145/* this is a structure representing a c-level coroutine */ 156/* this is a structure representing a c-level coroutine */
146typedef struct coro_cctx { 157typedef struct coro_cctx
158{
147 struct coro_cctx *next; 159 struct coro_cctx *next;
148 160
149 /* the stack */ 161 /* the stack */
150 void *sptr; 162 struct coro_stack stack;
151 size_t ssize;
152 163
153 /* cpu state */ 164 /* cpu state */
154 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166#ifndef NDEBUG
155 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 167 JMPENV *idle_te; /* same as idle_sp, but for top_env */
168#endif
156 JMPENV *top_env; 169 JMPENV *top_env;
157 coro_context cctx; 170 coro_context cctx;
158 171
172 U32 gen;
159#if CORO_USE_VALGRIND 173#if CORO_USE_VALGRIND
160 int valgrind_id; 174 int valgrind_id;
161#endif 175#endif
162 char inuse, mapped; 176 unsigned char flags;
163} coro_cctx; 177} coro_cctx;
164 178
179static coro_cctx *cctx_current; /* the currently running cctx */
180
181/*****************************************************************************/
182
183static MGVTBL coro_state_vtbl;
184
165enum { 185enum
186{
166 CF_RUNNING = 0x0001, /* coroutine is running */ 187 CF_RUNNING = 0x0001, /* coroutine is running */
167 CF_READY = 0x0002, /* coroutine is ready */ 188 CF_READY = 0x0002, /* coroutine is ready */
168 CF_NEW = 0x0004, /* has never been switched to */ 189 CF_NEW = 0x0004, /* has never been switched to */
169 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 190 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
191 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
192 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
170}; 193};
171 194
195/* the structure where most of the perl state is stored, overlaid on the cxstack */
196typedef struct
197{
198 #define VARx(name,expr,type) type name;
199 #include "state.h"
200} perl_slots;
201
202/* how many context stack entries do we need for perl_slots */
203#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
204
172/* this is a structure representing a perl-level coroutine */ 205/* this is a structure representing a perl-level coroutine */
173struct coro { 206struct coro
207{
174 /* the c coroutine allocated to this perl coroutine, if any */ 208 /* the C coroutine allocated to this perl coroutine, if any */
175 coro_cctx *cctx; 209 coro_cctx *cctx;
176 210
211 /* ready queue */
212 struct coro *next_ready;
213
214 /* state data */
215 struct CoroSLF slf_frame; /* saved slf frame */
216 AV *mainstack;
217 perl_slots *slot; /* basically the saved sp */
218
219 CV *startcv; /* the CV to execute */
177 /* data associated with this coroutine (initial args) */ 220 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 */ 221 int flags; /* CF_ flags */
222 HV *hv; /* the perl hash associated with this coro, if any */
182 223
183 /* optionally saved, might be zero */ 224 /* statistics */
184 AV *defav; /* @_ */ 225 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
194 226
195 /* coro process data */ 227 /* coro process data */
196 int prio; 228 int prio;
229 SV *except; /* exception to be thrown */
230 SV *rouse_cb; /* last rouse callback */
231 AV *on_destroy; /* callbacks or coros to notify on destroy */
232 AV *status; /* the exit status list */
233
234 /* async_pool */
235 SV *saved_deffh;
236 SV *invoke_cb;
237 AV *invoke_av;
238
239 /* on_enter/on_leave */
240 AV *on_enter;
241 AV *on_leave;
242
243 /* swap_sv */
244 AV *swap_sv;
245
246 /* times */
247 coro_ts t_cpu, t_real;
197 248
198 /* linked list */ 249 /* linked list */
199 struct coro *next, *prev; 250 struct coro *next, *prev;
200 HV *hv; /* the perl hash associated with this coro, if any */
201}; 251};
202 252
203typedef struct coro *Coro__State; 253typedef struct coro *Coro__State;
204typedef struct coro *Coro__State_or_hashref; 254typedef struct coro *Coro__State_or_hashref;
205 255
256/* the following variables are effectively part of the perl context */
257/* and get copied between struct coro and these variables */
258/* the main reason we don't support windows process emulation */
259static struct CoroSLF slf_frame; /* the current slf frame */
260
206/** Coro ********************************************************************/ 261/** Coro ********************************************************************/
207 262
208#define PRIO_MAX 3 263#define CORO_PRIO_MAX 3
209#define PRIO_HIGH 1 264#define CORO_PRIO_HIGH 1
210#define PRIO_NORMAL 0 265#define CORO_PRIO_NORMAL 0
211#define PRIO_LOW -1 266#define CORO_PRIO_LOW -1
212#define PRIO_IDLE -3 267#define CORO_PRIO_IDLE -3
213#define PRIO_MIN -4 268#define CORO_PRIO_MIN -4
214 269
215/* for Coro.pm */ 270/* for Coro.pm */
216static SV *coro_current; 271static SV *coro_current;
217static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 272static SV *coro_readyhook;
218static int coro_nready; 273static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
274static CV *cv_coro_run;
219static struct coro *coro_first; 275static struct coro *coro_first;
276#define coro_nready coroapi.nready
277
278/** JIT *********************************************************************/
279
280#if CORO_JIT
281 /* APPLE doesn't have mmap though */
282 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
283 #ifndef CORO_JIT_TYPE
284 #if ECB_AMD64 && CORO_JIT_UNIXY
285 #define CORO_JIT_TYPE "amd64-unix"
286 #elif __i386 && CORO_JIT_UNIXY
287 #define CORO_JIT_TYPE "x86-unix"
288 #endif
289 #endif
290#endif
291
292#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
293 #undef CORO_JIT
294#endif
295
296#if CORO_JIT
297 typedef void (*load_save_perl_slots_type)(perl_slots *);
298 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
299#endif
300
301/** Coro::Select ************************************************************/
302
303static OP *(*coro_old_pp_sselect) (pTHX);
304static SV *coro_select_select;
305
306/* horrible hack, but if it works... */
307static OP *
308coro_pp_sselect (pTHX)
309{
310 dSP;
311 PUSHMARK (SP - 4); /* fake argument list */
312 XPUSHs (coro_select_select);
313 PUTBACK;
314
315 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
316 PL_op->op_flags |= OPf_STACKED;
317 PL_op->op_private = 0;
318 return PL_ppaddr [OP_ENTERSUB](aTHX);
319}
320
321/** time stuff **************************************************************/
322
323#ifdef HAS_GETTIMEOFDAY
324
325ecb_inline void
326coro_u2time (pTHX_ UV ret[2])
327{
328 struct timeval tv;
329 gettimeofday (&tv, 0);
330
331 ret [0] = tv.tv_sec;
332 ret [1] = tv.tv_usec;
333}
334
335ecb_inline double
336coro_nvtime (void)
337{
338 struct timeval tv;
339 gettimeofday (&tv, 0);
340
341 return tv.tv_sec + tv.tv_usec * 1e-6;
342}
343
344ecb_inline void
345time_init (pTHX)
346{
347 nvtime = coro_nvtime;
348 u2time = coro_u2time;
349}
350
351#else
352
353ecb_inline void
354time_init (pTHX)
355{
356 SV **svp;
357
358 require_pv ("Time/HiRes.pm");
359
360 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
361
362 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
363 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
364
365 nvtime = INT2PTR (double (*)(), SvIV (*svp));
366
367 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
368 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
369}
370
371#endif
220 372
221/** lowlevel stuff **********************************************************/ 373/** lowlevel stuff **********************************************************/
222 374
223static AV * 375static SV * ecb_noinline
376coro_get_sv (pTHX_ const char *name, int create)
377{
378#if PERL_VERSION_ATLEAST (5,10,0)
379 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
380 get_sv (name, create);
381#endif
382 return get_sv (name, create);
383}
384
385static AV * ecb_noinline
386coro_get_av (pTHX_ const char *name, int create)
387{
388#if PERL_VERSION_ATLEAST (5,10,0)
389 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
390 get_av (name, create);
391#endif
392 return get_av (name, create);
393}
394
395static HV * ecb_noinline
396coro_get_hv (pTHX_ const char *name, int create)
397{
398#if PERL_VERSION_ATLEAST (5,10,0)
399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
400 get_hv (name, create);
401#endif
402 return get_hv (name, create);
403}
404
405ecb_inline void
406coro_times_update (void)
407{
408#ifdef coro_clock_gettime
409 struct timespec ts;
410
411 ts.tv_sec = ts.tv_nsec = 0;
412 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
413 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
414
415 ts.tv_sec = ts.tv_nsec = 0;
416 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
417 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
418#else
419 dTHX;
420 UV tv[2];
421
422 u2time (aTHX_ tv);
423 time_real [0] = tv [0];
424 time_real [1] = tv [1] * 1000;
425#endif
426}
427
428ecb_inline void
429coro_times_add (struct coro *c)
430{
431 c->t_real [1] += time_real [1];
432 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
433 c->t_real [0] += time_real [0];
434
435 c->t_cpu [1] += time_cpu [1];
436 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
437 c->t_cpu [0] += time_cpu [0];
438}
439
440ecb_inline void
441coro_times_sub (struct coro *c)
442{
443 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
444 c->t_real [1] -= time_real [1];
445 c->t_real [0] -= time_real [0];
446
447 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
448 c->t_cpu [1] -= time_cpu [1];
449 c->t_cpu [0] -= time_cpu [0];
450}
451
452/*****************************************************************************/
453/* magic glue */
454
455#define CORO_MAGIC_type_cv 26
456#define CORO_MAGIC_type_state PERL_MAGIC_ext
457
458#define CORO_MAGIC_NN(sv, type) \
459 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
460 ? SvMAGIC (sv) \
461 : mg_find (sv, type))
462
463#define CORO_MAGIC(sv, type) \
464 (ecb_expect_true (SvMAGIC (sv)) \
465 ? CORO_MAGIC_NN (sv, type) \
466 : 0)
467
468#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
469#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
470
471ecb_inline MAGIC *
472SvSTATEhv_p (pTHX_ SV *coro)
473{
474 MAGIC *mg;
475
476 if (ecb_expect_true (
477 SvTYPE (coro) == SVt_PVHV
478 && (mg = CORO_MAGIC_state (coro))
479 && mg->mg_virtual == &coro_state_vtbl
480 ))
481 return mg;
482
483 return 0;
484}
485
486ecb_inline struct coro *
487SvSTATE_ (pTHX_ SV *coro)
488{
489 MAGIC *mg;
490
491 if (SvROK (coro))
492 coro = SvRV (coro);
493
494 mg = SvSTATEhv_p (aTHX_ coro);
495 if (!mg)
496 croak ("Coro::State object required");
497
498 return (struct coro *)mg->mg_ptr;
499}
500
501#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
502
503/* faster than SvSTATE, but expects a coroutine hv */
504#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
505#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
506
507/*****************************************************************************/
508/* padlist management and caching */
509
510ecb_inline PADLIST *
224coro_clone_padlist (pTHX_ CV *cv) 511coro_derive_padlist (pTHX_ CV *cv)
225{ 512{
226 AV *padlist = CvPADLIST (cv); 513 PADLIST *padlist = CvPADLIST (cv);
227 AV *newpadlist, *newpad; 514 PADLIST *newpadlist;
515 PAD *newpad;
516 PADOFFSET off = PadlistMAX (padlist) + 1;
228 517
229 newpadlist = newAV (); 518#if NEWPADAPI
519
520 while (!PadlistARRAY (padlist)[off - 1])
521 --off;
522
523 Perl_pad_push (aTHX_ padlist, off);
524 newpad = PadlistARRAY (padlist)[off];
525 PadlistARRAY (padlist)[off] = 0;
526
527#else
528
529#if PERL_VERSION_ATLEAST (5,10,0)
530 Perl_pad_push (aTHX_ padlist, off);
531#else
532 Perl_pad_push (aTHX_ padlist, off, 1);
533#endif
534
535 newpad = PadlistARRAY (padlist)[off];
536 PadlistMAX (padlist) = off - 1;
537
538#endif
539
540 newPADLIST (newpadlist);
541#if !PERL_VERSION_ATLEAST(5,15,3)
542 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
230 AvREAL_off (newpadlist); 543 AvREAL_off (newpadlist);
231#if PERL_VERSION_ATLEAST (5,9,0) 544#endif
232 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 545
546 /* Already extended to 2 elements by newPADLIST. */
547 PadlistMAX (newpadlist) = 1;
548 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
549 PadlistARRAY (newpadlist)[1] = newpad;
550
551 return newpadlist;
552}
553
554ecb_inline void
555free_padlist (pTHX_ PADLIST *padlist)
556{
557 /* may be during global destruction */
558 if (!IN_DESTRUCT)
559 {
560 I32 i = PadlistMAX (padlist);
561
562 while (i > 0) /* special-case index 0 */
563 {
564 /* we try to be extra-careful here */
565 PAD *pad = PadlistARRAY (padlist)[i--];
566 I32 j = PadMAX (pad);
567
568 while (j >= 0)
569 SvREFCNT_dec (PadARRAY (pad)[j--]);
570
571 PadMAX (pad) = -1;
572 SvREFCNT_dec (pad);
573 }
574
575 SvREFCNT_dec (PadlistNAMES (padlist));
576
577#if NEWPADAPI
578 Safefree (PadlistARRAY (padlist));
579 Safefree (padlist);
233#else 580#else
234 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
235#endif
236 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
237 --AvFILLp (padlist);
238
239 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
240 av_store (newpadlist, 1, (SV *)newpad);
241
242 return newpadlist;
243}
244
245static void
246free_padlist (pTHX_ AV *padlist)
247{
248 /* may be during global destruction */
249 if (SvREFCNT (padlist))
250 {
251 I32 i = AvFILLp (padlist); 581 AvFILLp (padlist) = -1;
252 while (i >= 0) 582 AvREAL_off (padlist);
253 {
254 SV **svp = av_fetch (padlist, i--, FALSE);
255 if (svp)
256 {
257 SV *sv;
258 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
259 SvREFCNT_dec (sv);
260
261 SvREFCNT_dec (*svp);
262 }
263 }
264
265 SvREFCNT_dec ((SV*)padlist); 583 SvREFCNT_dec ((SV*)padlist);
584#endif
266 } 585 }
267} 586}
268 587
269static int 588static int
270coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 589coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271{ 590{
272 AV *padlist; 591 PADLIST *padlist;
273 AV *av = (AV *)mg->mg_obj; 592 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
593 size_t len = *(size_t *)mg->mg_ptr;
274 594
275 /* casting is fun. */ 595 /* perl manages to free our internal AV and _then_ call us */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 596 if (IN_DESTRUCT)
597 return 0;
598
599 while (len--)
277 free_padlist (aTHX_ padlist); 600 free_padlist (aTHX_ padlists[len]);
278
279 SvREFCNT_dec (av);
280 601
281 return 0; 602 return 0;
282} 603}
283 604
284#define PERL_MAGIC_coro PERL_MAGIC_ext 605static MGVTBL coro_cv_vtbl = {
285 606 0, 0, 0, 0,
286static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 607 coro_cv_free
287 608};
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
294 609
295/* the next two functions merely cache the padlists */ 610/* the next two functions merely cache the padlists */
296static void 611ecb_inline void
297get_padlist (pTHX_ CV *cv) 612get_padlist (pTHX_ CV *cv)
298{ 613{
299 MAGIC *mg = CORO_MAGIC (cv); 614 MAGIC *mg = CORO_MAGIC_cv (cv);
300 AV *av; 615 size_t *lenp;
301 616
302 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 617 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
303 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 618 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
304 else 619 else
305 { 620 {
306#if CORO_PREFER_PERL_FUNCTIONS 621#if CORO_PREFER_PERL_FUNCTIONS
307 /* this is probably cleaner, but also slower? */ 622 /* this is probably cleaner? but also slower! */
623 /* in practise, it seems to be less stable */
308 CV *cp = Perl_cv_clone (cv); 624 CV *cp = Perl_cv_clone (aTHX_ cv);
309 CvPADLIST (cv) = CvPADLIST (cp); 625 CvPADLIST (cv) = CvPADLIST (cp);
310 CvPADLIST (cp) = 0; 626 CvPADLIST (cp) = 0;
311 SvREFCNT_dec (cp); 627 SvREFCNT_dec (cp);
312#else 628#else
313 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 629 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
314#endif 630#endif
315 } 631 }
316} 632}
317 633
318static void 634ecb_inline void
319put_padlist (pTHX_ CV *cv) 635put_padlist (pTHX_ CV *cv)
320{ 636{
321 MAGIC *mg = CORO_MAGIC (cv); 637 MAGIC *mg = CORO_MAGIC_cv (cv);
322 AV *av;
323 638
324 if (!mg) 639 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 } 640 {
641 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
642 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
643 mg->mg_len = 1; /* so mg_free frees mg_ptr */
644 }
645 else
646 Renew (mg->mg_ptr,
647 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
648 char);
331 649
332 av = (AV *)mg->mg_obj; 650 ((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} 651}
339 652
340/** load & save, init *******************************************************/ 653/** load & save, init *******************************************************/
341 654
342#define SB do { 655ecb_inline void
343#define SE } while (0) 656swap_sv (SV *a, SV *b)
657{
658 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
659 SV tmp;
344 660
345#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 661 /* swap sv_any */
662 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
663
664 /* swap sv_flags */
665 SvFLAGS (&tmp) = SvFLAGS (a);
666 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
667 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
668
669#if PERL_VERSION_ATLEAST (5,10,0)
670 /* perl 5.10 and later complicates this _quite_ a bit, but it also
671 * is much faster, so no quarrels here. alternatively, we could
672 * sv_upgrade to avoid this.
673 */
674 {
675 /* swap sv_u */
676 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
677
678 /* if SvANY points to the head, we need to adjust the pointers,
679 * as the pointer for a still points to b, and maybe vice versa.
680 */
681 #define svany_in_head(type) \
682 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
683
684 if (svany_in_head (SvTYPE (a)))
685 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
686
687 if (svany_in_head (SvTYPE (b)))
688 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
689 }
690#endif
691}
692
693/* swap sv heads, at least logically */
694static void
695swap_svs (pTHX_ Coro__State c)
696{
697 int i;
698
699 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
700 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
701}
702
703#define SWAP_SVS(coro) \
704 if (ecb_expect_false ((coro)->swap_sv)) \
705 swap_svs (aTHX_ (coro))
706
707static void
708on_enterleave_call (pTHX_ SV *cb);
346 709
347static void 710static void
348load_perl (pTHX_ Coro__State c) 711load_perl (pTHX_ Coro__State c)
349{ 712{
350#define VAR(name,type) PL_ ## name = c->name; 713 perl_slots *slot = c->slot;
714 c->slot = 0;
715
716 PL_mainstack = c->mainstack;
717
718#if CORO_JIT
719 load_perl_slots (slot);
720#else
721 #define VARx(name,expr,type) expr = slot->name;
351# include "state.h" 722 #include "state.h"
352#undef VAR 723#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 }
373 724
374 { 725 {
375 dSP; 726 dSP;
727
376 CV *cv; 728 CV *cv;
377 729
378 /* now do the ugly restore mess */ 730 /* now do the ugly restore mess */
379 while ((cv = (CV *)POPs)) 731 while (ecb_expect_true (cv = (CV *)POPs))
380 { 732 {
381 put_padlist (aTHX_ cv); /* mark this padlist as available */ 733 put_padlist (aTHX_ cv); /* mark this padlist as available */
382 CvDEPTH (cv) = PTR2IV (POPs); 734 CvDEPTH (cv) = PTR2IV (POPs);
383 CvPADLIST (cv) = (AV *)POPs; 735 CvPADLIST (cv) = (PADLIST *)POPs;
384 } 736 }
385 737
386 PUTBACK; 738 PUTBACK;
387 } 739 }
740
741 slf_frame = c->slf_frame;
742 CORO_THROW = c->except;
743
744 if (ecb_expect_false (enable_times))
745 {
746 if (ecb_expect_false (!times_valid))
747 coro_times_update ();
748
749 coro_times_sub (c);
750 }
751
752 if (ecb_expect_false (c->on_enter))
753 {
754 int i;
755
756 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
757 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
758 }
759
760 SWAP_SVS (c);
388} 761}
389 762
390static void 763static void
391save_perl (pTHX_ Coro__State c) 764save_perl (pTHX_ Coro__State c)
392{ 765{
766 SWAP_SVS (c);
767
768 if (ecb_expect_false (c->on_leave))
769 {
770 int i;
771
772 for (i = AvFILLp (c->on_leave); i >= 0; --i)
773 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
774 }
775
776 times_valid = 0;
777
778 if (ecb_expect_false (enable_times))
779 {
780 coro_times_update (); times_valid = 1;
781 coro_times_add (c);
782 }
783
784 c->except = CORO_THROW;
785 c->slf_frame = slf_frame;
786
393 { 787 {
394 dSP; 788 dSP;
395 I32 cxix = cxstack_ix; 789 I32 cxix = cxstack_ix;
396 PERL_CONTEXT *ccstk = cxstack; 790 PERL_CONTEXT *ccstk = cxstack;
397 PERL_SI *top_si = PL_curstackinfo; 791 PERL_SI *top_si = PL_curstackinfo;
… …
403 797
404 XPUSHs (Nullsv); 798 XPUSHs (Nullsv);
405 /* this loop was inspired by pp_caller */ 799 /* this loop was inspired by pp_caller */
406 for (;;) 800 for (;;)
407 { 801 {
408 while (cxix >= 0) 802 while (ecb_expect_true (cxix >= 0))
409 { 803 {
410 PERL_CONTEXT *cx = &ccstk[cxix--]; 804 PERL_CONTEXT *cx = &ccstk[cxix--];
411 805
412 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 806 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
413 { 807 {
414 CV *cv = cx->blk_sub.cv; 808 CV *cv = cx->blk_sub.cv;
415 809
416 if (CvDEPTH (cv)) 810 if (ecb_expect_true (CvDEPTH (cv)))
417 { 811 {
418 EXTEND (SP, 3); 812 EXTEND (SP, 3);
419 PUSHs ((SV *)CvPADLIST (cv)); 813 PUSHs ((SV *)CvPADLIST (cv));
420 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 814 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
421 PUSHs ((SV *)cv); 815 PUSHs ((SV *)cv);
422 816
423 CvDEPTH (cv) = 0; 817 CvDEPTH (cv) = 0;
424 get_padlist (aTHX_ cv); 818 get_padlist (aTHX_ cv);
425 } 819 }
426 } 820 }
427 } 821 }
428 822
429 if (top_si->si_type == PERLSI_MAIN) 823 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
430 break; 824 break;
431 825
432 top_si = top_si->si_prev; 826 top_si = top_si->si_prev;
433 ccstk = top_si->si_cxstack; 827 ccstk = top_si->si_cxstack;
434 cxix = top_si->si_cxix; 828 cxix = top_si->si_cxix;
435 } 829 }
436 830
437 PUTBACK; 831 PUTBACK;
438 } 832 }
439 833
440 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 834 /* allocate some space on the context stack for our purposes */
441 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 835 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
442 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 836 {
443 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 837 unsigned int i;
444 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
445 838
446#define VAR(name,type)c->name = PL_ ## name; 839 for (i = 0; i < SLOT_COUNT; ++i)
840 CXINC;
841
842 cxstack_ix -= SLOT_COUNT; /* undo allocation */
843 }
844
845 c->mainstack = PL_mainstack;
846
847 {
848 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
849
850#if CORO_JIT
851 save_perl_slots (slot);
852#else
853 #define VARx(name,expr,type) slot->name = expr;
447# include "state.h" 854 #include "state.h"
448#undef VAR 855#endif
856 }
449} 857}
450 858
451/* 859/*
452 * allocate various perl stacks. This is an exact copy 860 * allocate various perl stacks. This is almost an exact copy
453 * of perl.c:init_stacks, except that it uses less memory 861 * of perl.c:init_stacks, except that it uses less memory
454 * on the (sometimes correct) assumption that coroutines do 862 * on the (sometimes correct) assumption that coroutines do
455 * not usually need a lot of stackspace. 863 * not usually need a lot of stackspace.
456 */ 864 */
457#if CORO_PREFER_PERL_FUNCTIONS 865#if CORO_PREFER_PERL_FUNCTIONS
458# define coro_init_stacks init_stacks 866# define coro_init_stacks(thx) init_stacks ()
459#else 867#else
460static void 868static void
461coro_init_stacks (pTHX) 869coro_init_stacks (pTHX)
462{ 870{
463 PL_curstackinfo = new_stackinfo(64, 6); 871 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; 872 PL_curstackinfo->si_type = PERLSI_MAIN;
465 PL_curstack = PL_curstackinfo->si_stack; 873 PL_curstack = PL_curstackinfo->si_stack;
466 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 874 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467 875
468 PL_stack_base = AvARRAY(PL_curstack); 876 PL_stack_base = AvARRAY(PL_curstack);
469 PL_stack_sp = PL_stack_base; 877 PL_stack_sp = PL_stack_base;
470 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 878 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471 879
472 New(50,PL_tmps_stack,64,SV*); 880 New(50,PL_tmps_stack,32,SV*);
473 PL_tmps_floor = -1; 881 PL_tmps_floor = -1;
474 PL_tmps_ix = -1; 882 PL_tmps_ix = -1;
475 PL_tmps_max = 64; 883 PL_tmps_max = 32;
476 884
477 New(54,PL_markstack,16,I32); 885 New(54,PL_markstack,16,I32);
478 PL_markstack_ptr = PL_markstack; 886 PL_markstack_ptr = PL_markstack;
479 PL_markstack_max = PL_markstack + 16; 887 PL_markstack_max = PL_markstack + 16;
480 888
481#ifdef SET_MARK_OFFSET 889#ifdef SET_MARK_OFFSET
482 SET_MARK_OFFSET; 890 SET_MARK_OFFSET;
483#endif 891#endif
484 892
485 New(54,PL_scopestack,16,I32); 893 New(54,PL_scopestack,8,I32);
486 PL_scopestack_ix = 0; 894 PL_scopestack_ix = 0;
487 PL_scopestack_max = 16; 895 PL_scopestack_max = 8;
896#if HAS_SCOPESTACK_NAME
897 New(54,PL_scopestack_name,8,const char*);
898#endif
488 899
489 New(54,PL_savestack,64,ANY); 900 New(54,PL_savestack,24,ANY);
490 PL_savestack_ix = 0; 901 PL_savestack_ix = 0;
491 PL_savestack_max = 64; 902 PL_savestack_max = 24;
492 903
493#if !PERL_VERSION_ATLEAST (5,9,0) 904#if !PERL_VERSION_ATLEAST (5,10,0)
494 New(54,PL_retstack,4,OP*); 905 New(54,PL_retstack,4,OP*);
495 PL_retstack_ix = 0; 906 PL_retstack_ix = 0;
496 PL_retstack_max = 4; 907 PL_retstack_max = 4;
497#endif 908#endif
498} 909}
… …
500 911
501/* 912/*
502 * destroy the stacks, the callchain etc... 913 * destroy the stacks, the callchain etc...
503 */ 914 */
504static void 915static void
505coro_destroy_stacks (pTHX) 916coro_destruct_stacks (pTHX)
506{ 917{
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) 918 while (PL_curstackinfo->si_next)
525 PL_curstackinfo = PL_curstackinfo->si_next; 919 PL_curstackinfo = PL_curstackinfo->si_next;
526 920
527 while (PL_curstackinfo) 921 while (PL_curstackinfo)
528 { 922 {
… …
537 } 931 }
538 932
539 Safefree (PL_tmps_stack); 933 Safefree (PL_tmps_stack);
540 Safefree (PL_markstack); 934 Safefree (PL_markstack);
541 Safefree (PL_scopestack); 935 Safefree (PL_scopestack);
936#if HAS_SCOPESTACK_NAME
937 Safefree (PL_scopestack_name);
938#endif
542 Safefree (PL_savestack); 939 Safefree (PL_savestack);
543#if !PERL_VERSION_ATLEAST (5,9,0) 940#if !PERL_VERSION_ATLEAST (5,10,0)
544 Safefree (PL_retstack); 941 Safefree (PL_retstack);
545#endif 942#endif
546} 943}
547 944
945#define CORO_RSS \
946 rss += sizeof (SYM (curstackinfo)); \
947 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
948 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
949 rss += SYM (tmps_max) * sizeof (SV *); \
950 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
951 rss += SYM (scopestack_max) * sizeof (I32); \
952 rss += SYM (savestack_max) * sizeof (ANY);
953
548static size_t 954static size_t
549coro_rss (struct coro *coro) 955coro_rss (pTHX_ struct coro *coro)
550{ 956{
551 size_t rss = sizeof (coro); 957 size_t rss = sizeof (*coro);
552 958
553 if (coro->mainstack) 959 if (coro->mainstack)
554 { 960 {
555 if (coro->flags & CF_RUNNING) 961 if (coro->flags & CF_RUNNING)
556 { 962 {
557 #define VAR(name,type)coro->name = PL_ ## name; 963 #define SYM(sym) PL_ ## sym
558 # include "state.h" 964 CORO_RSS;
559 #undef VAR 965 #undef SYM
560 } 966 }
561 967 else
562 rss += sizeof (coro->curstackinfo); 968 {
563 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 969 #define SYM(sym) coro->slot->sym
564 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 970 CORO_RSS;
565 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 971 #undef SYM
566 rss += coro->tmps_max * sizeof (SV *); 972 }
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 } 973 }
575 974
576 return rss; 975 return rss;
577} 976}
578 977
579/** coroutine stack handling ************************************************/ 978/** coroutine stack handling ************************************************/
580 979
980static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
981static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
982static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
983
984/* apparently < 5.8.8 */
985#ifndef MgPV_nolen_const
986#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
987 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
988 (const char*)(mg)->mg_ptr)
989#endif
990
991/*
992 * This overrides the default magic get method of %SIG elements.
993 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
994 * and instead of trying to save and restore the hash elements (extremely slow),
995 * we just provide our own readback here.
996 */
997static int ecb_cold
998coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
999{
1000 const char *s = MgPV_nolen_const (mg);
1001
1002 if (*s == '_')
1003 {
1004 SV **svp = 0;
1005
1006 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1007 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1008
1009 if (svp)
1010 {
1011 SV *ssv;
1012
1013 if (!*svp)
1014 ssv = &PL_sv_undef;
1015 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1016 ssv = sv_2mortal (newRV_inc (*svp));
1017 else
1018 ssv = *svp;
1019
1020 sv_setsv (sv, ssv);
1021 return 0;
1022 }
1023 }
1024
1025 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1026}
1027
1028static int ecb_cold
1029coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1030{
1031 const char *s = MgPV_nolen_const (mg);
1032
1033 if (*s == '_')
1034 {
1035 SV **svp = 0;
1036
1037 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1038 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1039
1040 if (svp)
1041 {
1042 SV *old = *svp;
1043 *svp = 0;
1044 SvREFCNT_dec (old);
1045 return 0;
1046 }
1047 }
1048
1049 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1050}
1051
1052static int ecb_cold
1053coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1054{
1055 const char *s = MgPV_nolen_const (mg);
1056
1057 if (*s == '_')
1058 {
1059 SV **svp = 0;
1060
1061 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1062 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1063
1064 if (svp)
1065 {
1066 SV *old = *svp;
1067 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1068 SvREFCNT_dec (old);
1069 return 0;
1070 }
1071 }
1072
1073 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1074}
1075
1076static void
1077prepare_nop (pTHX_ struct coro_transfer_args *ta)
1078{
1079 /* kind of mega-hacky, but works */
1080 ta->next = ta->prev = (struct coro *)ta;
1081}
1082
581static void 1083static int
1084slf_check_nop (pTHX_ struct CoroSLF *frame)
1085{
1086 return 0;
1087}
1088
1089static int
1090slf_check_repeat (pTHX_ struct CoroSLF *frame)
1091{
1092 return 1;
1093}
1094
1095static UNOP init_perl_op;
1096
1097ecb_noinline static void /* noinline to keep it out of the transfer fast path */
582setup_coro (pTHX_ struct coro *coro) 1098init_perl (pTHX_ struct coro *coro)
583{ 1099{
584 /* 1100 /*
585 * emulate part of the perl startup here. 1101 * emulate part of the perl startup here.
586 */ 1102 */
587 coro_init_stacks (aTHX); 1103 coro_init_stacks (aTHX);
588 1104
1105 PL_runops = RUNOPS_DEFAULT;
589 PL_curcop = &PL_compiling; 1106 PL_curcop = &PL_compiling;
590 PL_in_eval = EVAL_NULL; 1107 PL_in_eval = EVAL_NULL;
591 PL_comppad = 0; 1108 PL_comppad = 0;
1109 PL_comppad_name = 0;
1110 PL_comppad_name_fill = 0;
1111 PL_comppad_name_floor = 0;
592 PL_curpm = 0; 1112 PL_curpm = 0;
1113 PL_curpad = 0;
593 PL_localizing = 0; 1114 PL_localizing = 0;
594 PL_dirty = 0;
595 PL_restartop = 0; 1115 PL_restartop = 0;
1116#if PERL_VERSION_ATLEAST (5,10,0)
1117 PL_parser = 0;
1118#endif
1119 PL_hints = 0;
1120
1121 /* recreate the die/warn hooks */
1122 PL_diehook = SvREFCNT_inc (rv_diehook);
1123 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1124
1125 GvSV (PL_defgv) = newSV (0);
1126 GvAV (PL_defgv) = coro->args; coro->args = 0;
1127 GvSV (PL_errgv) = newSV (0);
1128 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1129 GvHV (PL_hintgv) = 0;
1130 PL_rs = newSVsv (GvSV (irsgv));
1131 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
596 1132
597 { 1133 {
598 dSP; 1134 dSP;
599 LOGOP myop; 1135 UNOP myop;
600 1136
601 SvREFCNT_dec (GvAV (PL_defgv));
602 GvAV (PL_defgv) = coro->args; coro->args = 0;
603
604 Zero (&myop, 1, LOGOP); 1137 Zero (&myop, 1, UNOP);
605 myop.op_next = Nullop; 1138 myop.op_next = Nullop;
1139 myop.op_type = OP_ENTERSUB;
606 myop.op_flags = OPf_WANT_VOID; 1140 myop.op_flags = OPf_WANT_VOID;
607 1141
608 PUSHMARK (SP); 1142 PUSHMARK (SP);
609 XPUSHs (av_shift (GvAV (PL_defgv))); 1143 PUSHs ((SV *)coro->startcv);
610 PUTBACK; 1144 PUTBACK;
611 PL_op = (OP *)&myop; 1145 PL_op = (OP *)&myop;
612 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1146 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
613 SPAGAIN;
614 } 1147 }
615 1148
616 ENTER; /* necessary e.g. for dounwind */ 1149 /* this newly created coroutine might be run on an existing cctx which most
617} 1150 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1151 */
1152 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1153 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1154 slf_frame.destroy = 0;
618 1155
1156 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1157 init_perl_op.op_next = PL_op;
1158 init_perl_op.op_type = OP_ENTERSUB;
1159 init_perl_op.op_ppaddr = pp_slf;
1160 /* no flags etc. required, as an init function won't be called */
1161
1162 PL_op = (OP *)&init_perl_op;
1163
1164 /* copy throw, in case it was set before init_perl */
1165 CORO_THROW = coro->except;
1166
1167 SWAP_SVS (coro);
1168
1169 if (ecb_expect_false (enable_times))
1170 {
1171 coro_times_update ();
1172 coro_times_sub (coro);
1173 }
1174}
1175
619static void 1176static void
1177coro_unwind_stacks (pTHX)
1178{
1179 if (!IN_DESTRUCT)
1180 {
1181 /* restore all saved variables and stuff */
1182 LEAVE_SCOPE (0);
1183 assert (PL_tmps_floor == -1);
1184
1185 /* free all temporaries */
1186 FREETMPS;
1187 assert (PL_tmps_ix == -1);
1188
1189 /* unwind all extra stacks */
1190 POPSTACK_TO (PL_mainstack);
1191
1192 /* unwind main stack */
1193 dounwind (-1);
1194 }
1195}
1196
1197static void
1198destroy_perl (pTHX_ struct coro *coro)
1199{
1200 SV *svf [9];
1201
1202 {
1203 SV *old_current = SvRV (coro_current);
1204 struct coro *current = SvSTATE (old_current);
1205
1206 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1207
1208 save_perl (aTHX_ current);
1209
1210 /* this will cause transfer_check to croak on block*/
1211 SvRV_set (coro_current, (SV *)coro->hv);
1212
1213 load_perl (aTHX_ coro);
1214
1215 coro_unwind_stacks (aTHX);
1216
1217 /* restore swapped sv's */
1218 SWAP_SVS (coro);
1219
1220 coro_destruct_stacks (aTHX);
1221
1222 /* now save some sv's to be free'd later */
1223 svf [0] = GvSV (PL_defgv);
1224 svf [1] = (SV *)GvAV (PL_defgv);
1225 svf [2] = GvSV (PL_errgv);
1226 svf [3] = (SV *)PL_defoutgv;
1227 svf [4] = PL_rs;
1228 svf [5] = GvSV (irsgv);
1229 svf [6] = (SV *)GvHV (PL_hintgv);
1230 svf [7] = PL_diehook;
1231 svf [8] = PL_warnhook;
1232 assert (9 == sizeof (svf) / sizeof (*svf));
1233
1234 SvRV_set (coro_current, old_current);
1235
1236 load_perl (aTHX_ current);
1237 }
1238
1239 {
1240 unsigned int i;
1241
1242 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1243 SvREFCNT_dec (svf [i]);
1244
1245 SvREFCNT_dec (coro->saved_deffh);
1246 SvREFCNT_dec (coro->rouse_cb);
1247 SvREFCNT_dec (coro->invoke_cb);
1248 SvREFCNT_dec (coro->invoke_av);
1249 }
1250}
1251
1252ecb_inline void
620free_coro_mortal (pTHX) 1253free_coro_mortal (pTHX)
621{ 1254{
622 if (coro_mortal) 1255 if (ecb_expect_true (coro_mortal))
623 { 1256 {
624 SvREFCNT_dec (coro_mortal); 1257 SvREFCNT_dec ((SV *)coro_mortal);
625 coro_mortal = 0; 1258 coro_mortal = 0;
626 } 1259 }
627} 1260}
628 1261
629/* inject a fake call to Coro::State::_cctx_init into the execution */ 1262static int
630/* _cctx_init should be careful, as it could be called at almost any time */ 1263runops_trace (pTHX)
631/* during execution of a perl program */
632static void NOINLINE
633prepare_cctx (pTHX_ coro_cctx *cctx)
634{ 1264{
635 dSP; 1265 COP *oldcop = 0;
636 LOGOP myop; 1266 int oldcxix = -2;
637 1267
638 Zero (&myop, 1, LOGOP); 1268 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
639 myop.op_next = PL_op; 1269 {
640 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1270 PERL_ASYNC_CHECK ();
641 1271
642 PUSHMARK (SP); 1272 if (cctx_current->flags & CC_TRACE_ALL)
643 EXTEND (SP, 2); 1273 {
644 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1274 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
645 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1275 {
646 PUTBACK; 1276 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
647 PL_op = (OP *)&myop; 1277 SV **bot, **top;
648 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1278 AV *av = newAV (); /* return values */
649 SPAGAIN; 1279 SV **cb;
1280 dSP;
1281
1282 GV *gv = CvGV (cx->blk_sub.cv);
1283 SV *fullname = sv_2mortal (newSV (0));
1284 if (isGV (gv))
1285 gv_efullname3 (fullname, gv, 0);
1286
1287 bot = PL_stack_base + cx->blk_oldsp + 1;
1288 top = cx->blk_gimme == G_ARRAY ? SP + 1
1289 : cx->blk_gimme == G_SCALAR ? bot + 1
1290 : bot;
1291
1292 av_extend (av, top - bot);
1293 while (bot < top)
1294 av_push (av, SvREFCNT_inc_NN (*bot++));
1295
1296 PL_runops = RUNOPS_DEFAULT;
1297 ENTER;
1298 SAVETMPS;
1299 EXTEND (SP, 3);
1300 PUSHMARK (SP);
1301 PUSHs (&PL_sv_no);
1302 PUSHs (fullname);
1303 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1304 PUTBACK;
1305 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1306 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1307 SPAGAIN;
1308 FREETMPS;
1309 LEAVE;
1310 PL_runops = runops_trace;
1311 }
1312
1313 if (oldcop != PL_curcop)
1314 {
1315 oldcop = PL_curcop;
1316
1317 if (PL_curcop != &PL_compiling)
1318 {
1319 SV **cb;
1320
1321 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1322 {
1323 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1324
1325 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1326 {
1327 dSP;
1328 GV *gv = CvGV (cx->blk_sub.cv);
1329 SV *fullname = sv_2mortal (newSV (0));
1330
1331 if (isGV (gv))
1332 gv_efullname3 (fullname, gv, 0);
1333
1334 PL_runops = RUNOPS_DEFAULT;
1335 ENTER;
1336 SAVETMPS;
1337 EXTEND (SP, 3);
1338 PUSHMARK (SP);
1339 PUSHs (&PL_sv_yes);
1340 PUSHs (fullname);
1341 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1342 PUTBACK;
1343 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1344 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1345 SPAGAIN;
1346 FREETMPS;
1347 LEAVE;
1348 PL_runops = runops_trace;
1349 }
1350
1351 oldcxix = cxstack_ix;
1352 }
1353
1354 if (cctx_current->flags & CC_TRACE_LINE)
1355 {
1356 dSP;
1357
1358 PL_runops = RUNOPS_DEFAULT;
1359 ENTER;
1360 SAVETMPS;
1361 EXTEND (SP, 3);
1362 PL_runops = RUNOPS_DEFAULT;
1363 PUSHMARK (SP);
1364 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1365 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1366 PUTBACK;
1367 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1368 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1369 SPAGAIN;
1370 FREETMPS;
1371 LEAVE;
1372 PL_runops = runops_trace;
1373 }
1374 }
1375 }
1376 }
1377 }
1378
1379 TAINT_NOT;
1380 return 0;
1381}
1382
1383static struct CoroSLF cctx_ssl_frame;
1384
1385static void
1386slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1387{
1388 ta->prev = 0;
1389}
1390
1391static int
1392slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1393{
1394 *frame = cctx_ssl_frame;
1395
1396 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1397}
1398
1399/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1400static void ecb_noinline
1401cctx_prepare (pTHX)
1402{
1403 PL_top_env = &PL_start_env;
1404
1405 if (cctx_current->flags & CC_TRACE)
1406 PL_runops = runops_trace;
1407
1408 /* we already must be executing an SLF op, there is no other valid way
1409 * that can lead to creation of a new cctx */
1410 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1411 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1412
1413 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1414 cctx_ssl_frame = slf_frame;
1415
1416 slf_frame.prepare = slf_prepare_set_stacklevel;
1417 slf_frame.check = slf_check_set_stacklevel;
1418}
1419
1420/* the tail of transfer: execute stuff we can only do after a transfer */
1421ecb_inline void
1422transfer_tail (pTHX)
1423{
1424 free_coro_mortal (aTHX);
1425}
1426
1427/* try to exit the same way perl's main function would do */
1428/* we do not bother resetting the environment or other things *7
1429/* that are not, uhm, essential */
1430/* this obviously also doesn't work when perl is embedded */
1431static void ecb_noinline ecb_cold
1432perlish_exit (pTHX)
1433{
1434 int exitstatus = perl_destruct (PL_curinterp);
1435 perl_free (PL_curinterp);
1436 exit (exitstatus);
650} 1437}
651 1438
652/* 1439/*
653 * this is a _very_ stripped down perl interpreter ;) 1440 * this is a _very_ stripped down perl interpreter ;)
654 */ 1441 */
655static void 1442static void
656coro_run (void *arg) 1443cctx_run (void *arg)
657{ 1444{
1445#ifdef USE_ITHREADS
1446# if CORO_PTHREAD
1447 PERL_SET_CONTEXT (coro_thx);
1448# endif
1449#endif
1450 {
658 dTHX; 1451 dTHX;
659 1452
660 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1453 /* normally we would need to skip the entersub here */
661 UNLOCK; 1454 /* not doing so will re-execute it, which is exactly what we want */
1455 /* PL_nop = PL_nop->op_next */
662 1456
663 PL_top_env = &PL_start_env;
664
665 /* inject a fake subroutine call to cctx_init */ 1457 /* inject a fake subroutine call to cctx_init */
666 prepare_cctx (aTHX_ (coro_cctx *)arg); 1458 cctx_prepare (aTHX);
667 1459
1460 /* cctx_run is the alternative tail of transfer() */
1461 transfer_tail (aTHX);
1462
668 /* somebody or something will hit me for both perl_run and PL_restartop */ 1463 /* somebody or something will hit me for both perl_run and PL_restartop */
669 PL_restartop = PL_op; 1464 PL_restartop = PL_op;
670 perl_run (PL_curinterp); 1465 perl_run (PL_curinterp);
671
672 /* 1466 /*
1467 * Unfortunately, there is no way to get at the return values of the
1468 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1469 * runtime errors here, as this is just a random interpreter, not a thread.
1470 */
1471
1472 /*
673 * If perl-run returns we assume exit() was being called or the coro 1473 * 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) 1474 * 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 1475 * 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" 1476 * doing in that case. YMMV.
677 * coroutine as Coro has no such concept
678 */ 1477 */
679 PL_top_env = main_top_env; 1478 perlish_exit (aTHX);
680 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1479 }
681} 1480}
682 1481
683static coro_cctx * 1482static coro_cctx *
684cctx_new () 1483cctx_new (void)
685{ 1484{
686 coro_cctx *cctx; 1485 coro_cctx *cctx;
687 void *stack_start;
688 size_t stack_size;
689 1486
690 ++cctx_count; 1487 ++cctx_count;
691
692 Newz (0, cctx, 1, coro_cctx); 1488 New (0, cctx, 1, coro_cctx);
693 1489
694#if HAVE_MMAP 1490 cctx->gen = cctx_gen;
1491 cctx->flags = 0;
1492 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
695 1493
696 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1494 return cctx;
697 /* mmap supposedly does allocate-on-write for us */ 1495}
698 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
699 1496
700 if (cctx->sptr != (void *)-1) 1497/* create a new cctx only suitable as source */
701 { 1498static coro_cctx *
702# if CORO_STACKGUARD 1499cctx_new_empty (void)
703 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1500{
704# endif 1501 coro_cctx *cctx = cctx_new ();
705 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1502
706 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1503 cctx->stack.sptr = 0;
707 cctx->mapped = 1; 1504 coro_create (&cctx->cctx, 0, 0, 0, 0);
1505
1506 return cctx;
1507}
1508
1509/* create a new cctx suitable as destination/running a perl interpreter */
1510static coro_cctx *
1511cctx_new_run (void)
1512{
1513 coro_cctx *cctx = cctx_new ();
1514
1515 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
708 } 1516 {
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"); 1517 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
718 _exit (EXIT_FAILURE); 1518 _exit (EXIT_FAILURE);
719 }
720
721 stack_start = cctx->sptr;
722 stack_size = cctx->ssize;
723 } 1519 }
724 1520
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); 1521 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
727 1522
728 return cctx; 1523 return cctx;
729} 1524}
730 1525
731static void 1526static void
732cctx_destroy (coro_cctx *cctx) 1527cctx_destroy (coro_cctx *cctx)
733{ 1528{
734 if (!cctx) 1529 if (!cctx)
735 return; 1530 return;
736 1531
1532 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1533
737 --cctx_count; 1534 --cctx_count;
1535 coro_destroy (&cctx->cctx);
738 1536
739#if CORO_USE_VALGRIND 1537 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 1538
750 Safefree (cctx); 1539 Safefree (cctx);
751} 1540}
1541
1542/* wether this cctx should be destructed */
1543#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
752 1544
753static coro_cctx * 1545static coro_cctx *
754cctx_get (pTHX) 1546cctx_get (pTHX)
755{ 1547{
756 while (cctx_first) 1548 while (ecb_expect_true (cctx_first))
757 { 1549 {
758 coro_cctx *cctx = cctx_first; 1550 coro_cctx *cctx = cctx_first;
759 cctx_first = cctx->next; 1551 cctx_first = cctx->next;
760 --cctx_idle; 1552 --cctx_idle;
761 1553
762 if (cctx->ssize >= coro_stacksize) 1554 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
763 return cctx; 1555 return cctx;
764 1556
765 cctx_destroy (cctx); 1557 cctx_destroy (cctx);
766 } 1558 }
767 1559
768 PL_op = PL_op->op_next;
769 return cctx_new (); 1560 return cctx_new_run ();
770} 1561}
771 1562
772static void 1563static void
773cctx_put (coro_cctx *cctx) 1564cctx_put (coro_cctx *cctx)
774{ 1565{
1566 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1567
775 /* free another cctx if overlimit */ 1568 /* free another cctx if overlimit */
776 if (cctx_idle >= MAX_IDLE_CCTX) 1569 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
777 { 1570 {
778 coro_cctx *first = cctx_first; 1571 coro_cctx *first = cctx_first;
779 cctx_first = first->next; 1572 cctx_first = first->next;
780 --cctx_idle; 1573 --cctx_idle;
781 1574
782 assert (!first->inuse);
783 cctx_destroy (first); 1575 cctx_destroy (first);
784 } 1576 }
785 1577
786 ++cctx_idle; 1578 ++cctx_idle;
787 cctx->next = cctx_first; 1579 cctx->next = cctx_first;
788 cctx_first = cctx; 1580 cctx_first = cctx;
789} 1581}
790 1582
791/** coroutine switching *****************************************************/ 1583/** coroutine switching *****************************************************/
792 1584
793/* never call directly, always through the coro_state_transfer global variable */ 1585static void
794static void NOINLINE
795transfer (pTHX_ struct coro *prev, struct coro *next) 1586transfer_check (pTHX_ struct coro *prev, struct coro *next)
1587{
1588 /* TODO: throwing up here is considered harmful */
1589
1590 if (ecb_expect_true (prev != next))
1591 {
1592 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1593 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1594
1595 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1596 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1597
1598#if !PERL_VERSION_ATLEAST (5,10,0)
1599 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1600 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1601#endif
1602 }
1603}
1604
1605/* always use the TRANSFER macro */
1606static void ecb_noinline /* noinline so we have a fixed stackframe */
1607transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
796{ 1608{
797 dSTACKLEVEL; 1609 dSTACKLEVEL;
798 1610
799 /* sometimes transfer is only called to set idle_sp */ 1611 /* sometimes transfer is only called to set idle_sp */
800 if (!next) 1612 if (ecb_expect_false (!prev))
801 { 1613 {
802 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1614 cctx_current->idle_sp = STACKLEVEL;
803 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1615 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
804 }
805 else if (prev != next)
806 { 1616 }
1617 else if (ecb_expect_true (prev != next))
1618 {
807 coro_cctx *prev__cctx; 1619 coro_cctx *cctx_prev;
808 1620
809 if (prev->flags & CF_NEW) 1621 if (ecb_expect_false (prev->flags & CF_NEW))
810 { 1622 {
811 /* create a new empty context */ 1623 /* create a new empty/source context */
812 Newz (0, prev->cctx, 1, coro_cctx);
813 prev->cctx->inuse = 1;
814 prev->flags &= ~CF_NEW; 1624 prev->flags &= ~CF_NEW;
815 prev->flags |= CF_RUNNING; 1625 prev->flags |= CF_RUNNING;
816 } 1626 }
817 1627
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; 1628 prev->flags &= ~CF_RUNNING;
829 next->flags |= CF_RUNNING; 1629 next->flags |= CF_RUNNING;
830 1630
831 LOCK; 1631 /* first get rid of the old state */
1632 save_perl (aTHX_ prev);
832 1633
833 if (next->flags & CF_NEW) 1634 if (ecb_expect_false (next->flags & CF_NEW))
834 { 1635 {
835 /* need to start coroutine */ 1636 /* need to start coroutine */
836 next->flags &= ~CF_NEW; 1637 next->flags &= ~CF_NEW;
837 /* first get rid of the old state */
838 save_perl (aTHX_ prev);
839 /* setup coroutine call */ 1638 /* setup coroutine call */
840 setup_coro (aTHX_ next); 1639 init_perl (aTHX_ next);
841 /* need a new stack */
842 assert (!next->cctx);
843 } 1640 }
844 else 1641 else
1642 load_perl (aTHX_ next);
1643
1644 /* possibly untie and reuse the cctx */
1645 if (ecb_expect_true (
1646 cctx_current->idle_sp == STACKLEVEL
1647 && !(cctx_current->flags & CC_TRACE)
1648 && !force_cctx
1649 ))
845 { 1650 {
846 /* coroutine already started */ 1651 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
847 save_perl (aTHX_ prev); 1652 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); 1653
1654 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1655 /* without this the next cctx_get might destroy the running cctx while still in use */
1656 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1657 if (ecb_expect_true (!next->cctx))
1658 next->cctx = cctx_get (aTHX);
1659
1660 cctx_put (cctx_current);
849 } 1661 }
1662 else
1663 prev->cctx = cctx_current;
850 1664
851 prev__cctx = prev->cctx; 1665 ++next->usecount;
852 1666
853 /* possibly "free" the cctx */ 1667 cctx_prev = cctx_current;
854 if (prev__cctx->idle_sp == STACKLEVEL) 1668 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1669
1670 next->cctx = 0;
1671
1672 if (ecb_expect_false (cctx_prev != cctx_current))
855 { 1673 {
856 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1674 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)); 1675 PL_top_env = cctx_current->top_env;
858 1676 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
859 prev->cctx = 0;
860
861 cctx_put (prev__cctx);
862 prev__cctx->inuse = 0;
863 } 1677 }
864 1678
865 if (!next->cctx) 1679 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 } 1680 }
882} 1681}
883 1682
884struct transfer_args 1683#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) 1684#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
890 1685
891/** high level stuff ********************************************************/ 1686/** high level stuff ********************************************************/
892 1687
1688/* this function is actually Coro, not Coro::State, but we call it from here */
1689/* because it is convenient - but it hasn't been declared yet for that reason */
893static int 1690static void
1691coro_call_on_destroy (pTHX_ struct coro *coro);
1692
1693static void
894coro_state_destroy (pTHX_ struct coro *coro) 1694coro_state_destroy (pTHX_ struct coro *coro)
895{ 1695{
896 if (coro->flags & CF_DESTROYED) 1696 if (coro->flags & CF_ZOMBIE)
897 return 0; 1697 return;
898 1698
1699 slf_destroy (aTHX_ coro);
1700
899 coro->flags |= CF_DESTROYED; 1701 coro->flags |= CF_ZOMBIE;
900 1702
901 if (coro->flags & CF_READY) 1703 if (coro->flags & CF_READY)
902 { 1704 {
903 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1705 /* reduce nready, as destroying a ready coro effectively unreadies it */
904 /* alternative: look through all ready queues and remove the coro */ 1706 /* alternative: look through all ready queues and remove the coro */
905 LOCK;
906 --coro_nready; 1707 --coro_nready;
907 UNLOCK;
908 } 1708 }
909 else 1709 else
910 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1710 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 1711
937 if (coro->next) coro->next->prev = coro->prev; 1712 if (coro->next) coro->next->prev = coro->prev;
938 if (coro->prev) coro->prev->next = coro->next; 1713 if (coro->prev) coro->prev->next = coro->next;
939 if (coro == coro_first) coro_first = coro->next; 1714 if (coro == coro_first) coro_first = coro->next;
940 1715
941 return 1; 1716 if (coro->mainstack
1717 && coro->mainstack != main_mainstack
1718 && coro->slot
1719 && !PL_dirty)
1720 destroy_perl (aTHX_ coro);
1721
1722 cctx_destroy (coro->cctx);
1723 SvREFCNT_dec (coro->startcv);
1724 SvREFCNT_dec (coro->args);
1725 SvREFCNT_dec (coro->swap_sv);
1726 SvREFCNT_dec (CORO_THROW);
1727
1728 coro_call_on_destroy (aTHX_ coro);
1729
1730 /* more destruction mayhem in coro_state_free */
942} 1731}
943 1732
944static int 1733static int
945coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1734coro_state_free (pTHX_ SV *sv, MAGIC *mg)
946{ 1735{
947 struct coro *coro = (struct coro *)mg->mg_ptr; 1736 struct coro *coro = (struct coro *)mg->mg_ptr;
948 mg->mg_ptr = 0; 1737 mg->mg_ptr = 0;
949 1738
950 coro->hv = 0;
951
952 if (--coro->refcnt < 0)
953 {
954 coro_state_destroy (aTHX_ coro); 1739 coro_state_destroy (aTHX_ coro);
1740 SvREFCNT_dec (coro->on_destroy);
1741 SvREFCNT_dec (coro->status);
1742
955 Safefree (coro); 1743 Safefree (coro);
956 }
957 1744
958 return 0; 1745 return 0;
959} 1746}
960 1747
961static int 1748static int ecb_cold
962coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1749coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
963{ 1750{
964 struct coro *coro = (struct coro *)mg->mg_ptr; 1751 /* called when perl clones the current process the slow way (windows process emulation) */
965 1752 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
966 ++coro->refcnt; 1753 mg->mg_ptr = 0;
1754 mg->mg_virtual = 0;
967 1755
968 return 0; 1756 return 0;
969} 1757}
970 1758
971static MGVTBL coro_state_vtbl = { 1759static MGVTBL coro_state_vtbl = {
… …
977#else 1765#else
978# define MGf_DUP 0 1766# define MGf_DUP 0
979#endif 1767#endif
980}; 1768};
981 1769
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 1770static void
1006prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1771prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1007{ 1772{
1008 ta->prev = SvSTATE (prev_sv); 1773 ta->prev = SvSTATE (prev_sv);
1009 ta->next = SvSTATE (next_sv); 1774 ta->next = SvSTATE (next_sv);
1775 TRANSFER_CHECK (*ta);
1010} 1776}
1011 1777
1012static void 1778static void
1013api_transfer (SV *prev_sv, SV *next_sv) 1779api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1780{
1781 struct coro_transfer_args ta;
1782
1783 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1784 TRANSFER (ta, 1);
1785}
1786
1787/** Coro ********************************************************************/
1788
1789ecb_inline void
1790coro_enq (pTHX_ struct coro *coro)
1791{
1792 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1793
1794 SvREFCNT_inc_NN (coro->hv);
1795
1796 coro->next_ready = 0;
1797 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1798 ready [1] = coro;
1799}
1800
1801ecb_inline struct coro *
1802coro_deq (pTHX)
1803{
1804 int prio;
1805
1806 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1807 {
1808 struct coro **ready = coro_ready [prio];
1809
1810 if (ready [0])
1811 {
1812 struct coro *coro = ready [0];
1813 ready [0] = coro->next_ready;
1814 return coro;
1815 }
1816 }
1817
1818 return 0;
1819}
1820
1821static void
1822invoke_sv_ready_hook_helper (void)
1014{ 1823{
1015 dTHX; 1824 dTHX;
1016 struct transfer_args ta; 1825 dSP;
1017 1826
1018 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1827 ENTER;
1019 TRANSFER (ta); 1828 SAVETMPS;
1829
1830 PUSHMARK (SP);
1831 PUTBACK;
1832 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1833
1834 FREETMPS;
1835 LEAVE;
1020} 1836}
1021 1837
1022static int 1838static int
1023api_save (SV *coro_sv, int new_save) 1839api_ready (pTHX_ SV *coro_sv)
1024{ 1840{
1025 dTHX;
1026 struct coro *coro = SvSTATE (coro_sv); 1841 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 1842
1070 if (coro->flags & CF_READY) 1843 if (coro->flags & CF_READY)
1071 return 0; 1844 return 0;
1072 1845
1073 coro->flags |= CF_READY; 1846 coro->flags |= CF_READY;
1074 1847
1075 LOCK; 1848 coro_enq (aTHX_ coro);
1076 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1849
1077 ++coro_nready; 1850 if (!coro_nready++)
1078 UNLOCK; 1851 if (coroapi.readyhook)
1852 coroapi.readyhook ();
1079 1853
1080 return 1; 1854 return 1;
1081} 1855}
1082 1856
1083static int 1857static int
1084api_is_ready (SV *coro_sv) 1858api_is_ready (pTHX_ SV *coro_sv)
1085{ 1859{
1086 dTHX;
1087 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1860 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1088} 1861}
1089 1862
1863/* expects to own a reference to next->hv */
1864ecb_inline void
1865prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1866{
1867 SV *prev_sv = SvRV (coro_current);
1868
1869 ta->prev = SvSTATE_hv (prev_sv);
1870 ta->next = next;
1871
1872 TRANSFER_CHECK (*ta);
1873
1874 SvRV_set (coro_current, (SV *)next->hv);
1875
1876 free_coro_mortal (aTHX);
1877 coro_mortal = prev_sv;
1878}
1879
1090static void 1880static void
1091prepare_schedule (pTHX_ struct transfer_args *ta) 1881prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1092{ 1882{
1093 SV *prev_sv, *next_sv;
1094
1095 for (;;) 1883 for (;;)
1096 { 1884 {
1097 LOCK; 1885 struct coro *next = coro_deq (aTHX);
1098 next_sv = coro_deq (aTHX_ PRIO_MIN);
1099 1886
1887 if (ecb_expect_true (next))
1888 {
1889 /* cannot transfer to destroyed coros, skip and look for next */
1890 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1891 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1892 else
1893 {
1894 next->flags &= ~CF_READY;
1895 --coro_nready;
1896
1897 prepare_schedule_to (aTHX_ ta, next);
1898 break;
1899 }
1900 }
1901 else
1902 {
1100 /* nothing to schedule: call the idle handler */ 1903 /* nothing to schedule: call the idle handler */
1101 if (!next_sv) 1904 if (SvROK (sv_idle)
1905 && SvOBJECT (SvRV (sv_idle)))
1906 {
1907 if (SvRV (sv_idle) == SvRV (coro_current))
1908 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1909
1910 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1911 api_ready (aTHX_ SvRV (sv_idle));
1912 --coro_nready;
1913 }
1914 else
1915 {
1916 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1917 dSP;
1918
1919 ENTER;
1920 SAVETMPS;
1921
1922 PUSHMARK (SP);
1923 PUTBACK;
1924 call_sv (sv_idle, G_VOID | G_DISCARD);
1925
1926 FREETMPS;
1927 LEAVE;
1928 }
1929 }
1930 }
1931}
1932
1933ecb_inline void
1934prepare_cede (pTHX_ struct coro_transfer_args *ta)
1935{
1936 api_ready (aTHX_ coro_current);
1937 prepare_schedule (aTHX_ ta);
1938}
1939
1940ecb_inline void
1941prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1942{
1943 SV *prev = SvRV (coro_current);
1944
1945 if (coro_nready)
1946 {
1947 prepare_schedule (aTHX_ ta);
1948 api_ready (aTHX_ prev);
1949 }
1950 else
1951 prepare_nop (aTHX_ ta);
1952}
1953
1954static void
1955api_schedule (pTHX)
1956{
1957 struct coro_transfer_args ta;
1958
1959 prepare_schedule (aTHX_ &ta);
1960 TRANSFER (ta, 1);
1961}
1962
1963static void
1964api_schedule_to (pTHX_ SV *coro_sv)
1965{
1966 struct coro_transfer_args ta;
1967 struct coro *next = SvSTATE (coro_sv);
1968
1969 SvREFCNT_inc_NN (coro_sv);
1970 prepare_schedule_to (aTHX_ &ta, next);
1971}
1972
1973static int
1974api_cede (pTHX)
1975{
1976 struct coro_transfer_args ta;
1977
1978 prepare_cede (aTHX_ &ta);
1979
1980 if (ecb_expect_true (ta.prev != ta.next))
1981 {
1982 TRANSFER (ta, 1);
1983 return 1;
1984 }
1985 else
1986 return 0;
1987}
1988
1989static int
1990api_cede_notself (pTHX)
1991{
1992 if (coro_nready)
1993 {
1994 struct coro_transfer_args ta;
1995
1996 prepare_cede_notself (aTHX_ &ta);
1997 TRANSFER (ta, 1);
1998 return 1;
1999 }
2000 else
2001 return 0;
2002}
2003
2004static void
2005api_trace (pTHX_ SV *coro_sv, int flags)
2006{
2007 struct coro *coro = SvSTATE (coro_sv);
2008
2009 if (coro->flags & CF_RUNNING)
2010 croak ("cannot enable tracing on a running coroutine, caught");
2011
2012 if (flags & CC_TRACE)
2013 {
2014 if (!coro->cctx)
2015 coro->cctx = cctx_new_run ();
2016 else if (!(coro->cctx->flags & CC_TRACE))
2017 croak ("cannot enable tracing on coroutine with custom stack, caught");
2018
2019 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2020 }
2021 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2022 {
2023 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2024
2025 if (coro->flags & CF_RUNNING)
2026 PL_runops = RUNOPS_DEFAULT;
2027 else
2028 coro->slot->runops = RUNOPS_DEFAULT;
2029 }
2030}
2031
2032static void
2033coro_push_av (pTHX_ AV *av, I32 gimme_v)
2034{
2035 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2036 {
2037 dSP;
2038
2039 if (gimme_v == G_SCALAR)
2040 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2041 else
2042 {
2043 int i;
2044 EXTEND (SP, AvFILLp (av) + 1);
2045
2046 for (i = 0; i <= AvFILLp (av); ++i)
2047 PUSHs (AvARRAY (av)[i]);
2048 }
2049
2050 PUTBACK;
2051 }
2052}
2053
2054static void
2055coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2056{
2057 if (!coro->on_destroy)
2058 coro->on_destroy = newAV ();
2059
2060 av_push (coro->on_destroy, cb);
2061}
2062
2063static void
2064slf_destroy_join (pTHX_ struct CoroSLF *frame)
2065{
2066 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2067}
2068
2069static int
2070slf_check_join (pTHX_ struct CoroSLF *frame)
2071{
2072 struct coro *coro = (struct coro *)frame->data;
2073
2074 if (!coro->status)
2075 return 1;
2076
2077 frame->destroy = 0;
2078
2079 coro_push_av (aTHX_ coro->status, GIMME_V);
2080
2081 SvREFCNT_dec ((SV *)coro->hv);
2082
2083 return 0;
2084}
2085
2086static void
2087slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2088{
2089 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2090
2091 if (items > 1)
2092 croak ("join called with too many arguments");
2093
2094 if (coro->status)
2095 frame->prepare = prepare_nop;
2096 else
2097 {
2098 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2099 frame->prepare = prepare_schedule;
2100 }
2101
2102 frame->check = slf_check_join;
2103 frame->destroy = slf_destroy_join;
2104 frame->data = (void *)coro;
2105 SvREFCNT_inc (coro->hv);
2106}
2107
2108static void
2109coro_call_on_destroy (pTHX_ struct coro *coro)
2110{
2111 AV *od = coro->on_destroy;
2112
2113 if (!od)
2114 return;
2115
2116 coro->on_destroy = 0;
2117 sv_2mortal ((SV *)od);
2118
2119 while (AvFILLp (od) >= 0)
2120 {
2121 SV *cb = sv_2mortal (av_pop (od));
2122
2123 /* coro hv's (and only hv's at the moment) are supported as well */
2124 if (SvSTATEhv_p (aTHX_ cb))
2125 api_ready (aTHX_ cb);
2126 else
2127 {
2128 dSP; /* don't disturb outer sp */
2129 PUSHMARK (SP);
2130
2131 if (coro->status)
2132 {
2133 PUTBACK;
2134 coro_push_av (aTHX_ coro->status, G_ARRAY);
2135 SPAGAIN;
2136 }
2137
2138 PUTBACK;
2139 call_sv (cb, G_VOID | G_DISCARD);
2140 }
2141 }
2142}
2143
2144static void
2145coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2146{
2147 AV *av;
2148
2149 if (coro->status)
2150 {
2151 av = coro->status;
2152 av_clear (av);
2153 }
2154 else
2155 av = coro->status = newAV ();
2156
2157 /* items are actually not so common, so optimise for this case */
2158 if (items)
2159 {
2160 int i;
2161
2162 av_extend (av, items - 1);
2163
2164 for (i = 0; i < items; ++i)
2165 av_push (av, SvREFCNT_inc_NN (arg [i]));
2166 }
2167}
2168
2169static void
2170slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2171{
2172 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2173 api_ready (aTHX_ sv_manager);
2174
2175 frame->prepare = prepare_schedule;
2176 frame->check = slf_check_repeat;
2177
2178 /* as a minor optimisation, we could unwind all stacks here */
2179 /* but that puts extra pressure on pp_slf, and is not worth much */
2180 /*coro_unwind_stacks (aTHX);*/
2181}
2182
2183static void
2184slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2185{
2186 HV *coro_hv = (HV *)SvRV (coro_current);
2187
2188 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2189 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2190}
2191
2192static void
2193slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2194{
2195 HV *coro_hv;
2196 struct coro *coro;
2197
2198 if (items <= 0)
2199 croak ("Coro::cancel called without coro object,");
2200
2201 coro = SvSTATE (arg [0]);
2202 coro_hv = coro->hv;
2203
2204 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2205
2206 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2207 {
2208 /* coro currently busy cancelling something, so just notify it */
2209 coro->slf_frame.data = (void *)coro;
2210
2211 frame->prepare = prepare_nop;
2212 frame->check = slf_check_nop;
2213 }
2214 else if (coro_hv == (HV *)SvRV (coro_current))
2215 {
2216 /* cancelling the current coro is allowed, and equals terminate */
2217 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2218 }
2219 else
2220 {
2221 struct coro *self = SvSTATE_current;
2222
2223 /* otherwise we cancel directly, purely for speed reasons
2224 * unfortunately, this requires some magic trickery, as
2225 * somebody else could cancel us, so we have to fight the cancellation.
2226 * this is ugly, and hopefully fully worth the extra speed.
2227 * besides, I can't get the slow-but-safe version working...
2228 */
2229 slf_frame.data = 0;
2230 self->flags |= CF_NOCANCEL;
2231 coro_state_destroy (aTHX_ coro);
2232 self->flags &= ~CF_NOCANCEL;
2233
2234 if (slf_frame.data)
2235 {
2236 /* while we were busy we have been cancelled, so terminate */
2237 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2238 }
2239 else
2240 {
2241 frame->prepare = prepare_nop;
2242 frame->check = slf_check_nop;
2243 }
2244 }
2245}
2246
2247static int
2248slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2249{
2250 frame->prepare = 0;
2251 coro_unwind_stacks (aTHX);
2252
2253 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2254
2255 return 1;
2256}
2257
2258static int
2259safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2260{
2261 if (coro->cctx)
2262 croak ("coro inside C callback, unable to cancel at this time, caught");
2263
2264 if (coro->flags & CF_NEW)
2265 {
2266 coro_set_status (aTHX_ coro, arg, items);
2267 coro_state_destroy (aTHX_ coro);
2268 }
2269 else
2270 {
2271 if (!coro->slf_frame.prepare)
2272 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2273
2274 slf_destroy (aTHX_ coro);
2275
2276 coro_set_status (aTHX_ coro, arg, items);
2277 coro->slf_frame.prepare = prepare_nop;
2278 coro->slf_frame.check = slf_check_safe_cancel;
2279
2280 api_ready (aTHX_ (SV *)coro->hv);
2281 }
2282
2283 return 1;
2284}
2285
2286/*****************************************************************************/
2287/* async pool handler */
2288
2289static int
2290slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2291{
2292 HV *hv = (HV *)SvRV (coro_current);
2293 struct coro *coro = (struct coro *)frame->data;
2294
2295 if (!coro->invoke_cb)
2296 return 1; /* loop till we have invoke */
2297 else
2298 {
2299 hv_store (hv, "desc", sizeof ("desc") - 1,
2300 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2301
2302 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2303
2304 {
2305 dSP;
2306 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2307 PUTBACK;
2308 }
2309
2310 SvREFCNT_dec (GvAV (PL_defgv));
2311 GvAV (PL_defgv) = coro->invoke_av;
2312 coro->invoke_av = 0;
2313
2314 return 0;
2315 }
2316}
2317
2318static void
2319slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2320{
2321 HV *hv = (HV *)SvRV (coro_current);
2322 struct coro *coro = SvSTATE_hv ((SV *)hv);
2323
2324 if (ecb_expect_true (coro->saved_deffh))
2325 {
2326 /* subsequent iteration */
2327 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2328 coro->saved_deffh = 0;
2329
2330 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2331 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2332 {
2333 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2334 return;
2335 }
2336 else
2337 {
2338 av_clear (GvAV (PL_defgv));
2339 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2340
2341 coro->prio = 0;
2342
2343 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2344 api_trace (aTHX_ coro_current, 0);
2345
2346 frame->prepare = prepare_schedule;
2347 av_push (av_async_pool, SvREFCNT_inc (hv));
2348 }
2349 }
2350 else
2351 {
2352 /* first iteration, simply fall through */
2353 frame->prepare = prepare_nop;
2354 }
2355
2356 frame->check = slf_check_pool_handler;
2357 frame->data = (void *)coro;
2358}
2359
2360/*****************************************************************************/
2361/* rouse callback */
2362
2363#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2364
2365static void
2366coro_rouse_callback (pTHX_ CV *cv)
2367{
2368 dXSARGS;
2369 SV *data = (SV *)S_GENSUB_ARG;
2370
2371 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2372 {
2373 /* first call, set args */
2374 SV *coro = SvRV (data);
2375 AV *av = newAV ();
2376
2377 SvRV_set (data, (SV *)av);
2378
2379 /* better take a full copy of the arguments */
2380 while (items--)
2381 av_store (av, items, newSVsv (ST (items)));
2382
2383 api_ready (aTHX_ coro);
2384 SvREFCNT_dec (coro);
2385 }
2386
2387 XSRETURN_EMPTY;
2388}
2389
2390static int
2391slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2392{
2393 SV *data = (SV *)frame->data;
2394
2395 if (CORO_THROW)
2396 return 0;
2397
2398 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2399 return 1;
2400
2401 /* now push all results on the stack */
2402 {
2403 dSP;
2404 AV *av = (AV *)SvRV (data);
2405 int i;
2406
2407 EXTEND (SP, AvFILLp (av) + 1);
2408 for (i = 0; i <= AvFILLp (av); ++i)
2409 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2410
2411 /* we have stolen the elements, so set length to zero and free */
2412 AvFILLp (av) = -1;
2413 av_undef (av);
2414
2415 PUTBACK;
2416 }
2417
2418 return 0;
2419}
2420
2421static void
2422slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2423{
2424 SV *cb;
2425
2426 if (items)
2427 cb = arg [0];
2428 else
2429 {
2430 struct coro *coro = SvSTATE_current;
2431
2432 if (!coro->rouse_cb)
2433 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2434
2435 cb = sv_2mortal (coro->rouse_cb);
2436 coro->rouse_cb = 0;
2437 }
2438
2439 if (!SvROK (cb)
2440 || SvTYPE (SvRV (cb)) != SVt_PVCV
2441 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2442 croak ("Coro::rouse_wait called with illegal callback argument,");
2443
2444 {
2445 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2446 SV *data = (SV *)S_GENSUB_ARG;
2447
2448 frame->data = (void *)data;
2449 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2450 frame->check = slf_check_rouse_wait;
2451 }
2452}
2453
2454static SV *
2455coro_new_rouse_cb (pTHX)
2456{
2457 HV *hv = (HV *)SvRV (coro_current);
2458 struct coro *coro = SvSTATE_hv (hv);
2459 SV *data = newRV_inc ((SV *)hv);
2460 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2461
2462 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2463 SvREFCNT_dec (data); /* magicext increases the refcount */
2464
2465 SvREFCNT_dec (coro->rouse_cb);
2466 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2467
2468 return cb;
2469}
2470
2471/*****************************************************************************/
2472/* schedule-like-function opcode (SLF) */
2473
2474static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2475static const CV *slf_cv;
2476static SV **slf_argv;
2477static int slf_argc, slf_arga; /* count, allocated */
2478static I32 slf_ax; /* top of stack, for restore */
2479
2480/* this restores the stack in the case we patched the entersub, to */
2481/* recreate the stack frame as perl will on following calls */
2482/* since entersub cleared the stack */
2483static OP *
2484pp_restore (pTHX)
2485{
2486 int i;
2487 SV **SP = PL_stack_base + slf_ax;
2488
2489 PUSHMARK (SP);
2490
2491 EXTEND (SP, slf_argc + 1);
2492
2493 for (i = 0; i < slf_argc; ++i)
2494 PUSHs (sv_2mortal (slf_argv [i]));
2495
2496 PUSHs ((SV *)CvGV (slf_cv));
2497
2498 RETURNOP (slf_restore.op_first);
2499}
2500
2501static void
2502slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2503{
2504 SV **arg = (SV **)slf_frame.data;
2505
2506 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2507}
2508
2509static void
2510slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2511{
2512 if (items != 2)
2513 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2514
2515 frame->prepare = slf_prepare_transfer;
2516 frame->check = slf_check_nop;
2517 frame->data = (void *)arg; /* let's hope it will stay valid */
2518}
2519
2520static void
2521slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2522{
2523 frame->prepare = prepare_schedule;
2524 frame->check = slf_check_nop;
2525}
2526
2527static void
2528slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2529{
2530 struct coro *next = (struct coro *)slf_frame.data;
2531
2532 SvREFCNT_inc_NN (next->hv);
2533 prepare_schedule_to (aTHX_ ta, next);
2534}
2535
2536static void
2537slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2538{
2539 if (!items)
2540 croak ("Coro::schedule_to expects a coroutine argument, caught");
2541
2542 frame->data = (void *)SvSTATE (arg [0]);
2543 frame->prepare = slf_prepare_schedule_to;
2544 frame->check = slf_check_nop;
2545}
2546
2547static void
2548slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2549{
2550 api_ready (aTHX_ SvRV (coro_current));
2551
2552 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2553}
2554
2555static void
2556slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2557{
2558 frame->prepare = prepare_cede;
2559 frame->check = slf_check_nop;
2560}
2561
2562static void
2563slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2564{
2565 frame->prepare = prepare_cede_notself;
2566 frame->check = slf_check_nop;
2567}
2568
2569/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2570static void
2571slf_destroy (pTHX_ struct coro *coro)
2572{
2573 /* this callback is reserved for slf functions needing to do cleanup */
2574 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2575 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2576
2577 /*
2578 * The on_destroy above most likely is from an SLF call.
2579 * Since by definition the SLF call will not finish when we destroy
2580 * the coro, we will have to force-finish it here, otherwise
2581 * cleanup functions cannot call SLF functions.
2582 */
2583 coro->slf_frame.prepare = 0;
2584}
2585
2586/*
2587 * these not obviously related functions are all rolled into one
2588 * function to increase chances that they all will call transfer with the same
2589 * stack offset
2590 * SLF stands for "schedule-like-function".
2591 */
2592static OP *
2593pp_slf (pTHX)
2594{
2595 I32 checkmark; /* mark SP to see how many elements check has pushed */
2596
2597 /* set up the slf frame, unless it has already been set-up */
2598 /* the latter happens when a new coro has been started */
2599 /* or when a new cctx was attached to an existing coroutine */
2600 if (ecb_expect_true (!slf_frame.prepare))
2601 {
2602 /* first iteration */
2603 dSP;
2604 SV **arg = PL_stack_base + TOPMARK + 1;
2605 int items = SP - arg; /* args without function object */
2606 SV *gv = *sp;
2607
2608 /* do a quick consistency check on the "function" object, and if it isn't */
2609 /* for us, divert to the real entersub */
2610 if (SvTYPE (gv) != SVt_PVGV
2611 || !GvCV (gv)
2612 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2613 return PL_ppaddr[OP_ENTERSUB](aTHX);
2614
2615 if (!(PL_op->op_flags & OPf_STACKED))
2616 {
2617 /* ampersand-form of call, use @_ instead of stack */
2618 AV *av = GvAV (PL_defgv);
2619 arg = AvARRAY (av);
2620 items = AvFILLp (av) + 1;
2621 }
2622
2623 /* now call the init function, which needs to set up slf_frame */
2624 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2625 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2626
2627 /* pop args */
2628 SP = PL_stack_base + POPMARK;
2629
2630 PUTBACK;
2631 }
2632
2633 /* now that we have a slf_frame, interpret it! */
2634 /* we use a callback system not to make the code needlessly */
2635 /* complicated, but so we can run multiple perl coros from one cctx */
2636
2637 do
2638 {
2639 struct coro_transfer_args ta;
2640
2641 slf_frame.prepare (aTHX_ &ta);
2642 TRANSFER (ta, 0);
2643
2644 checkmark = PL_stack_sp - PL_stack_base;
2645 }
2646 while (slf_frame.check (aTHX_ &slf_frame));
2647
2648 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2649
2650 /* exception handling */
2651 if (ecb_expect_false (CORO_THROW))
2652 {
2653 SV *exception = sv_2mortal (CORO_THROW);
2654
2655 CORO_THROW = 0;
2656 sv_setsv (ERRSV, exception);
2657 croak (0);
2658 }
2659
2660 /* return value handling - mostly like entersub */
2661 /* make sure we put something on the stack in scalar context */
2662 if (GIMME_V == G_SCALAR
2663 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2664 {
2665 dSP;
2666 SV **bot = PL_stack_base + checkmark;
2667
2668 if (sp == bot) /* too few, push undef */
2669 bot [1] = &PL_sv_undef;
2670 else /* too many, take last one */
2671 bot [1] = *sp;
2672
2673 SP = bot + 1;
2674
2675 PUTBACK;
2676 }
2677
2678 return NORMAL;
2679}
2680
2681static void
2682api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2683{
2684 int i;
2685 SV **arg = PL_stack_base + ax;
2686 int items = PL_stack_sp - arg + 1;
2687
2688 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2689
2690 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2691 && PL_op->op_ppaddr != pp_slf)
2692 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2693
2694 CvFLAGS (cv) |= CVf_SLF;
2695 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2696 slf_cv = cv;
2697
2698 /* we patch the op, and then re-run the whole call */
2699 /* we have to put the same argument on the stack for this to work */
2700 /* and this will be done by pp_restore */
2701 slf_restore.op_next = (OP *)&slf_restore;
2702 slf_restore.op_type = OP_CUSTOM;
2703 slf_restore.op_ppaddr = pp_restore;
2704 slf_restore.op_first = PL_op;
2705
2706 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2707
2708 if (PL_op->op_flags & OPf_STACKED)
2709 {
2710 if (items > slf_arga)
2711 {
2712 slf_arga = items;
2713 Safefree (slf_argv);
2714 New (0, slf_argv, slf_arga, SV *);
2715 }
2716
2717 slf_argc = items;
2718
2719 for (i = 0; i < items; ++i)
2720 slf_argv [i] = SvREFCNT_inc (arg [i]);
2721 }
2722 else
2723 slf_argc = 0;
2724
2725 PL_op->op_ppaddr = pp_slf;
2726 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2727
2728 PL_op = (OP *)&slf_restore;
2729}
2730
2731/*****************************************************************************/
2732/* dynamic wind */
2733
2734static void
2735on_enterleave_call (pTHX_ SV *cb)
2736{
2737 dSP;
2738
2739 PUSHSTACK;
2740
2741 PUSHMARK (SP);
2742 PUTBACK;
2743 call_sv (cb, G_VOID | G_DISCARD);
2744 SPAGAIN;
2745
2746 POPSTACK;
2747}
2748
2749static SV *
2750coro_avp_pop_and_free (pTHX_ AV **avp)
2751{
2752 AV *av = *avp;
2753 SV *res = av_pop (av);
2754
2755 if (AvFILLp (av) < 0)
2756 {
2757 *avp = 0;
2758 SvREFCNT_dec (av);
2759 }
2760
2761 return res;
2762}
2763
2764static void
2765coro_pop_on_enter (pTHX_ void *coro)
2766{
2767 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2768 SvREFCNT_dec (cb);
2769}
2770
2771static void
2772coro_pop_on_leave (pTHX_ void *coro)
2773{
2774 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2775 on_enterleave_call (aTHX_ sv_2mortal (cb));
2776}
2777
2778/*****************************************************************************/
2779/* PerlIO::cede */
2780
2781typedef struct
2782{
2783 PerlIOBuf base;
2784 NV next, every;
2785} PerlIOCede;
2786
2787static IV ecb_cold
2788PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2789{
2790 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2791
2792 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2793 self->next = nvtime () + self->every;
2794
2795 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2796}
2797
2798static SV * ecb_cold
2799PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2800{
2801 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2802
2803 return newSVnv (self->every);
2804}
2805
2806static IV
2807PerlIOCede_flush (pTHX_ PerlIO *f)
2808{
2809 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2810 double now = nvtime ();
2811
2812 if (now >= self->next)
2813 {
2814 api_cede (aTHX);
2815 self->next = now + self->every;
2816 }
2817
2818 return PerlIOBuf_flush (aTHX_ f);
2819}
2820
2821static PerlIO_funcs PerlIO_cede =
2822{
2823 sizeof(PerlIO_funcs),
2824 "cede",
2825 sizeof(PerlIOCede),
2826 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2827 PerlIOCede_pushed,
2828 PerlIOBuf_popped,
2829 PerlIOBuf_open,
2830 PerlIOBase_binmode,
2831 PerlIOCede_getarg,
2832 PerlIOBase_fileno,
2833 PerlIOBuf_dup,
2834 PerlIOBuf_read,
2835 PerlIOBuf_unread,
2836 PerlIOBuf_write,
2837 PerlIOBuf_seek,
2838 PerlIOBuf_tell,
2839 PerlIOBuf_close,
2840 PerlIOCede_flush,
2841 PerlIOBuf_fill,
2842 PerlIOBase_eof,
2843 PerlIOBase_error,
2844 PerlIOBase_clearerr,
2845 PerlIOBase_setlinebuf,
2846 PerlIOBuf_get_base,
2847 PerlIOBuf_bufsiz,
2848 PerlIOBuf_get_ptr,
2849 PerlIOBuf_get_cnt,
2850 PerlIOBuf_set_ptrcnt,
2851};
2852
2853/*****************************************************************************/
2854/* Coro::Semaphore & Coro::Signal */
2855
2856static SV *
2857coro_waitarray_new (pTHX_ int count)
2858{
2859 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2860 AV *av = newAV ();
2861 SV **ary;
2862
2863 /* unfortunately, building manually saves memory */
2864 Newx (ary, 2, SV *);
2865 AvALLOC (av) = ary;
2866#if PERL_VERSION_ATLEAST (5,10,0)
2867 AvARRAY (av) = ary;
2868#else
2869 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2870 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2871 SvPVX ((SV *)av) = (char *)ary;
2872#endif
2873 AvMAX (av) = 1;
2874 AvFILLp (av) = 0;
2875 ary [0] = newSViv (count);
2876
2877 return newRV_noinc ((SV *)av);
2878}
2879
2880/* semaphore */
2881
2882static void
2883coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2884{
2885 SV *count_sv = AvARRAY (av)[0];
2886 IV count = SvIVX (count_sv);
2887
2888 count += adjust;
2889 SvIVX (count_sv) = count;
2890
2891 /* now wake up as many waiters as are expected to lock */
2892 while (count > 0 && AvFILLp (av) > 0)
2893 {
2894 SV *cb;
2895
2896 /* swap first two elements so we can shift a waiter */
2897 AvARRAY (av)[0] = AvARRAY (av)[1];
2898 AvARRAY (av)[1] = count_sv;
2899 cb = av_shift (av);
2900
2901 if (SvOBJECT (cb))
2902 {
2903 api_ready (aTHX_ cb);
2904 --count;
2905 }
2906 else if (SvTYPE (cb) == SVt_PVCV)
1102 { 2907 {
1103 dSP; 2908 dSP;
1104 UNLOCK;
1105
1106 ENTER;
1107 SAVETMPS;
1108
1109 PUSHMARK (SP); 2909 PUSHMARK (SP);
2910 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1110 PUTBACK; 2911 PUTBACK;
1111 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2912 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1112
1113 FREETMPS;
1114 LEAVE;
1115 continue;
1116 } 2913 }
1117 2914
1118 ta->next = SvSTATE (next_sv); 2915 SvREFCNT_dec (cb);
2916 }
2917}
1119 2918
1120 /* cannot transfer to destroyed coros, skip and look for next */ 2919static void
1121 if (ta->next->flags & CF_DESTROYED) 2920coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2921{
2922 /* call $sem->adjust (0) to possibly wake up some other waiters */
2923 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2924}
2925
2926static int
2927slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2928{
2929 AV *av = (AV *)frame->data;
2930 SV *count_sv = AvARRAY (av)[0];
2931 SV *coro_hv = SvRV (coro_current);
2932
2933 /* if we are about to throw, don't actually acquire the lock, just throw */
2934 if (CORO_THROW)
2935 return 0;
2936 else if (SvIVX (count_sv) > 0)
2937 {
2938 frame->destroy = 0;
2939
2940 if (acquire)
2941 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2942 else
2943 coro_semaphore_adjust (aTHX_ av, 0);
2944
2945 return 0;
2946 }
2947 else
2948 {
2949 int i;
2950 /* if we were woken up but can't down, we look through the whole */
2951 /* waiters list and only add us if we aren't in there already */
2952 /* this avoids some degenerate memory usage cases */
2953 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2954 if (AvARRAY (av)[i] == coro_hv)
2955 return 1;
2956
2957 av_push (av, SvREFCNT_inc (coro_hv));
2958 return 1;
2959 }
2960}
2961
2962static int
2963slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2964{
2965 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2966}
2967
2968static int
2969slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2970{
2971 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2972}
2973
2974static void
2975slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2976{
2977 AV *av = (AV *)SvRV (arg [0]);
2978
2979 if (SvIVX (AvARRAY (av)[0]) > 0)
2980 {
2981 frame->data = (void *)av;
2982 frame->prepare = prepare_nop;
2983 }
2984 else
2985 {
2986 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2987
2988 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2989 frame->prepare = prepare_schedule;
2990 /* to avoid race conditions when a woken-up coro gets terminated */
2991 /* we arrange for a temporary on_destroy that calls adjust (0) */
2992 frame->destroy = coro_semaphore_destroy;
2993 }
2994}
2995
2996static void
2997slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2998{
2999 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3000 frame->check = slf_check_semaphore_down;
3001}
3002
3003static void
3004slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3005{
3006 if (items >= 2)
3007 {
3008 /* callback form */
3009 AV *av = (AV *)SvRV (arg [0]);
3010 SV *cb_cv = s_get_cv_croak (arg [1]);
3011
3012 av_push (av, SvREFCNT_inc_NN (cb_cv));
3013
3014 if (SvIVX (AvARRAY (av)[0]) > 0)
3015 coro_semaphore_adjust (aTHX_ av, 0);
3016
3017 frame->prepare = prepare_nop;
3018 frame->check = slf_check_nop;
3019 }
3020 else
3021 {
3022 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3023 frame->check = slf_check_semaphore_wait;
3024 }
3025}
3026
3027/* signal */
3028
3029static void
3030coro_signal_wake (pTHX_ AV *av, int count)
3031{
3032 SvIVX (AvARRAY (av)[0]) = 0;
3033
3034 /* now signal count waiters */
3035 while (count > 0 && AvFILLp (av) > 0)
3036 {
3037 SV *cb;
3038
3039 /* swap first two elements so we can shift a waiter */
3040 cb = AvARRAY (av)[0];
3041 AvARRAY (av)[0] = AvARRAY (av)[1];
3042 AvARRAY (av)[1] = cb;
3043
3044 cb = av_shift (av);
3045
3046 if (SvTYPE (cb) == SVt_PVCV)
1122 { 3047 {
3048 dSP;
3049 PUSHMARK (SP);
3050 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1123 UNLOCK; 3051 PUTBACK;
1124 SvREFCNT_dec (next_sv); 3052 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1125 /* coro_nready is already taken care of by destroy */
1126 continue;
1127 } 3053 }
3054 else
3055 {
3056 api_ready (aTHX_ cb);
3057 sv_setiv (cb, 0); /* signal waiter */
3058 }
1128 3059
1129 --coro_nready; 3060 SvREFCNT_dec (cb);
1130 UNLOCK;
1131 break;
1132 }
1133 3061
1134 /* free this only after the transfer */ 3062 --count;
1135 prev_sv = SvRV (coro_current); 3063 }
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} 3064}
1154 3065
1155static int 3066static int
1156prepare_cede_notself (pTHX_ struct transfer_args *ta) 3067slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1157{ 3068{
1158 if (coro_nready) 3069 /* if we are about to throw, also stop waiting */
3070 return SvROK ((SV *)frame->data) && !CORO_THROW;
3071}
3072
3073static void
3074slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3075{
3076 AV *av = (AV *)SvRV (arg [0]);
3077
3078 if (items >= 2)
3079 {
3080 SV *cb_cv = s_get_cv_croak (arg [1]);
3081 av_push (av, SvREFCNT_inc_NN (cb_cv));
3082
3083 if (SvIVX (AvARRAY (av)[0]))
3084 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3085
3086 frame->prepare = prepare_nop;
3087 frame->check = slf_check_nop;
1159 { 3088 }
1160 SV *prev = SvRV (coro_current); 3089 else if (SvIVX (AvARRAY (av)[0]))
1161 prepare_schedule (aTHX_ ta); 3090 {
1162 api_ready (prev); 3091 SvIVX (AvARRAY (av)[0]) = 0;
1163 return 1; 3092 frame->prepare = prepare_nop;
3093 frame->check = slf_check_nop;
1164 } 3094 }
1165 else 3095 else
3096 {
3097 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3098
3099 av_push (av, waiter);
3100
3101 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3102 frame->prepare = prepare_schedule;
3103 frame->check = slf_check_signal_wait;
3104 }
3105}
3106
3107/*****************************************************************************/
3108/* Coro::AIO */
3109
3110#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3111
3112/* helper storage struct */
3113struct io_state
3114{
3115 int errorno;
3116 I32 laststype; /* U16 in 5.10.0 */
3117 int laststatval;
3118 Stat_t statcache;
3119};
3120
3121static void
3122coro_aio_callback (pTHX_ CV *cv)
3123{
3124 dXSARGS;
3125 AV *state = (AV *)S_GENSUB_ARG;
3126 SV *coro = av_pop (state);
3127 SV *data_sv = newSV (sizeof (struct io_state));
3128
3129 av_extend (state, items - 1);
3130
3131 sv_upgrade (data_sv, SVt_PV);
3132 SvCUR_set (data_sv, sizeof (struct io_state));
3133 SvPOK_only (data_sv);
3134
3135 {
3136 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3137
3138 data->errorno = errno;
3139 data->laststype = PL_laststype;
3140 data->laststatval = PL_laststatval;
3141 data->statcache = PL_statcache;
3142 }
3143
3144 /* now build the result vector out of all the parameters and the data_sv */
3145 {
3146 int i;
3147
3148 for (i = 0; i < items; ++i)
3149 av_push (state, SvREFCNT_inc_NN (ST (i)));
3150 }
3151
3152 av_push (state, data_sv);
3153
3154 api_ready (aTHX_ coro);
3155 SvREFCNT_dec (coro);
3156 SvREFCNT_dec ((AV *)state);
3157}
3158
3159static int
3160slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3161{
3162 AV *state = (AV *)frame->data;
3163
3164 /* if we are about to throw, return early */
3165 /* this does not cancel the aio request, but at least */
3166 /* it quickly returns */
3167 if (CORO_THROW)
1166 return 0; 3168 return 0;
1167}
1168 3169
1169static void 3170 /* one element that is an RV? repeat! */
1170api_schedule (void) 3171 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; 3172 return 1;
3173
3174 /* restore status */
3175 {
3176 SV *data_sv = av_pop (state);
3177 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3178
3179 errno = data->errorno;
3180 PL_laststype = data->laststype;
3181 PL_laststatval = data->laststatval;
3182 PL_statcache = data->statcache;
3183
3184 SvREFCNT_dec (data_sv);
1191 } 3185 }
1192 else 3186
3187 /* push result values */
3188 {
3189 dSP;
3190 int i;
3191
3192 EXTEND (SP, AvFILLp (state) + 1);
3193 for (i = 0; i <= AvFILLp (state); ++i)
3194 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3195
3196 PUTBACK;
3197 }
3198
1193 return 0; 3199 return 0;
1194} 3200}
1195 3201
1196static int 3202static void
1197api_cede_notself (void) 3203slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1198{ 3204{
1199 dTHX; 3205 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
1200 struct transfer_args ta; 3206 SV *coro_hv = SvRV (coro_current);
3207 struct coro *coro = SvSTATE_hv (coro_hv);
1201 3208
1202 if (prepare_cede_notself (aTHX_ &ta)) 3209 /* put our coroutine id on the state arg */
1203 { 3210 av_push (state, SvREFCNT_inc_NN (coro_hv));
1204 TRANSFER (ta); 3211
1205 return 1; 3212 /* first see whether we have a non-zero priority and set it as AIO prio */
3213 if (coro->prio)
1206 } 3214 {
1207 else 3215 dSP;
1208 return 0;
1209}
1210 3216
3217 static SV *prio_cv;
3218 static SV *prio_sv;
3219
3220 if (ecb_expect_false (!prio_cv))
3221 {
3222 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3223 prio_sv = newSViv (0);
3224 }
3225
3226 PUSHMARK (SP);
3227 sv_setiv (prio_sv, coro->prio);
3228 XPUSHs (prio_sv);
3229
3230 PUTBACK;
3231 call_sv (prio_cv, G_VOID | G_DISCARD);
3232 }
3233
3234 /* now call the original request */
3235 {
3236 dSP;
3237 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3238 int i;
3239
3240 PUSHMARK (SP);
3241
3242 /* first push all args to the stack */
3243 EXTEND (SP, items + 1);
3244
3245 for (i = 0; i < items; ++i)
3246 PUSHs (arg [i]);
3247
3248 /* now push the callback closure */
3249 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3250
3251 /* now call the AIO function - we assume our request is uncancelable */
3252 PUTBACK;
3253 call_sv ((SV *)req, G_VOID | G_DISCARD);
3254 }
3255
3256 /* now that the request is going, we loop till we have a result */
3257 frame->data = (void *)state;
3258 frame->prepare = prepare_schedule;
3259 frame->check = slf_check_aio_req;
3260}
3261
3262static void
3263coro_aio_req_xs (pTHX_ CV *cv)
3264{
3265 dXSARGS;
3266
3267 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3268
3269 XSRETURN_EMPTY;
3270}
3271
3272/*****************************************************************************/
3273
3274#if CORO_CLONE
3275# include "clone.c"
3276#endif
3277
3278/*****************************************************************************/
3279
3280static SV *
3281coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3282{
3283 SV *coro_sv;
3284 struct coro *coro;
3285 MAGIC *mg;
3286 HV *hv;
3287 SV *cb;
3288 int i;
3289
3290 if (argc > 0)
3291 {
3292 cb = s_get_cv_croak (argv [0]);
3293
3294 if (!is_coro)
3295 {
3296 if (CvISXSUB (cb))
3297 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3298
3299 if (!CvROOT (cb))
3300 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3301 }
3302 }
3303
3304 Newz (0, coro, 1, struct coro);
3305 coro->args = newAV ();
3306 coro->flags = CF_NEW;
3307
3308 if (coro_first) coro_first->prev = coro;
3309 coro->next = coro_first;
3310 coro_first = coro;
3311
3312 coro->hv = hv = newHV ();
3313 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3314 mg->mg_flags |= MGf_DUP;
3315 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3316
3317 if (argc > 0)
3318 {
3319 av_extend (coro->args, argc + is_coro - 1);
3320
3321 if (is_coro)
3322 {
3323 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3324 cb = (SV *)cv_coro_run;
3325 }
3326
3327 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3328
3329 for (i = 1; i < argc; i++)
3330 av_push (coro->args, newSVsv (argv [i]));
3331 }
3332
3333 return coro_sv;
3334}
3335
3336#ifndef __cplusplus
3337ecb_cold XS(boot_Coro__State);
3338#endif
3339
3340#if CORO_JIT
3341
3342static void ecb_noinline ecb_cold
3343pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3344{
3345 dSP;
3346 AV *av = newAV ();
3347
3348 av_store (av, 3, newSVuv (d));
3349 av_store (av, 2, newSVuv (c));
3350 av_store (av, 1, newSVuv (b));
3351 av_store (av, 0, newSVuv (a));
3352
3353 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3354
3355 PUTBACK;
3356}
3357
3358static void ecb_noinline ecb_cold
3359jit_init (pTHX)
3360{
3361 dSP;
3362 SV *load, *save;
3363 char *map_base;
3364 char *load_ptr, *save_ptr;
3365 STRLEN load_len, save_len, map_len;
3366 int count;
3367
3368 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3369
3370 PUSHMARK (SP);
3371 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3372 #include "state.h"
3373 count = call_pv ("Coro::State::_jit", G_ARRAY);
3374 SPAGAIN;
3375
3376 save = POPs; save_ptr = SvPVbyte (save, save_len);
3377 load = POPs; load_ptr = SvPVbyte (load, load_len);
3378
3379 map_len = load_len + save_len + 16;
3380
3381 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3382
3383 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3384
3385 load_perl_slots = (load_save_perl_slots_type)map_base;
3386 memcpy (map_base, load_ptr, load_len);
3387
3388 map_base += (load_len + 15) & ~15;
3389
3390 save_perl_slots = (load_save_perl_slots_type)map_base;
3391 memcpy (map_base, save_ptr, save_len);
3392
3393 /* we are good citizens and try to make the page read-only, so the evil evil */
3394 /* hackers might have it a bit more difficult */
3395 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3396
3397 PUTBACK;
3398 eval_pv ("undef &Coro::State::_jit", 1);
3399}
3400
3401#endif
3402
1211MODULE = Coro::State PACKAGE = Coro::State 3403MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1212 3404
1213PROTOTYPES: DISABLE 3405PROTOTYPES: DISABLE
1214 3406
1215BOOT: 3407BOOT:
1216{ 3408{
1217#ifdef USE_ITHREADS 3409#ifdef USE_ITHREADS
1218 MUTEX_INIT (&coro_mutex); 3410# if CORO_PTHREAD
3411 coro_thx = PERL_GET_CONTEXT;
1219#endif 3412# endif
1220 BOOT_PAGESIZE; 3413#endif
3414 /* perl defines these to check for existance first, but why it doesn't */
3415 /* just create them one at init time is not clear to me, except for */
3416 /* programs trying to delete them, but... */
3417 /* anyway, we declare this as invalid and make sure they are initialised here */
3418 DEFSV;
3419 ERRSV;
3420
3421 cctx_current = cctx_new_empty ();
3422
3423 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3424 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3425
3426 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3427 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3428 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3429
3430 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3431 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3432 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1221 3433
1222 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3434 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1223 3435
1224 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3436 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1225 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 3437 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)); 3438 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1230 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3439 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1231 3440
1232 main_mainstack = PL_mainstack; 3441 main_mainstack = PL_mainstack;
1233 main_top_env = PL_top_env; 3442 main_top_env = PL_top_env;
1234 3443
1235 while (main_top_env->je_prev) 3444 while (main_top_env->je_prev)
1236 main_top_env = main_top_env->je_prev; 3445 main_top_env = main_top_env->je_prev;
1237 3446
3447 {
3448 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3449
3450 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3451 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3452
3453 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3454 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3455 }
3456
1238 coroapi.ver = CORO_API_VERSION; 3457 coroapi.ver = CORO_API_VERSION;
3458 coroapi.rev = CORO_API_REVISION;
3459
1239 coroapi.transfer = api_transfer; 3460 coroapi.transfer = api_transfer;
1240 3461
3462 coroapi.sv_state = SvSTATE_;
3463 coroapi.execute_slf = api_execute_slf;
3464 coroapi.prepare_nop = prepare_nop;
3465 coroapi.prepare_schedule = prepare_schedule;
3466 coroapi.prepare_cede = prepare_cede;
3467 coroapi.prepare_cede_notself = prepare_cede_notself;
3468
3469 time_init (aTHX);
3470
1241 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3471 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3472#if CORO_JIT
3473 PUTBACK;
3474 jit_init (aTHX);
3475 SPAGAIN;
3476#endif
1242} 3477}
1243 3478
1244SV * 3479SV *
1245new (char *klass, ...) 3480new (SV *klass, ...)
3481 ALIAS:
3482 Coro::new = 1
1246 CODE: 3483 CODE:
1247{ 3484 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: 3485 OUTPUT:
1276 RETVAL 3486 RETVAL
1277 3487
1278int 3488void
1279save_also (SV *coro_sv, int save_also) 3489transfer (...)
3490 PROTOTYPE: $$
1280 CODE: 3491 CODE:
3492 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3493
3494SV *
3495clone (Coro::State coro)
3496 CODE:
1281{ 3497{
1282 struct coro *coro = SvSTATE (coro_sv); 3498#if CORO_CLONE
1283 RETVAL = coro->save; 3499 struct coro *ncoro = coro_clone (aTHX_ coro);
1284 coro->save |= save_also; 3500 MAGIC *mg;
3501 /* TODO: too much duplication */
3502 ncoro->hv = newHV ();
3503 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3504 mg->mg_flags |= MGf_DUP;
3505 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3506#else
3507 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3508#endif
1285} 3509}
1286 OUTPUT: 3510 OUTPUT:
1287 RETVAL 3511 RETVAL
1288 3512
1289void 3513int
1290_set_stacklevel (...) 3514cctx_stacksize (int new_stacksize = 0)
1291 ALIAS: 3515 PROTOTYPE: ;$
1292 Coro::State::transfer = 1 3516 CODE:
1293 Coro::schedule = 2 3517 RETVAL = cctx_stacksize;
1294 Coro::cede = 3 3518 if (new_stacksize)
1295 Coro::cede_notself = 4
1296 CODE:
1297{
1298 struct transfer_args ta;
1299
1300 switch (ix)
1301 { 3519 {
1302 case 0: 3520 cctx_stacksize = new_stacksize;
1303 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 3521 ++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 } 3522 }
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: 3523 OUTPUT:
1341 RETVAL 3524 RETVAL
1342 3525
1343void 3526int
1344_exit (code) 3527cctx_max_idle (int max_idle = 0)
1345 int code 3528 PROTOTYPE: ;$
1346 PROTOTYPE: $
1347 CODE: 3529 CODE:
1348 _exit (code); 3530 RETVAL = cctx_max_idle;
1349 3531 if (max_idle > 1)
1350int 3532 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: 3533 OUTPUT:
1357 RETVAL 3534 RETVAL
1358 3535
1359int 3536int
1360cctx_count () 3537cctx_count ()
3538 PROTOTYPE:
1361 CODE: 3539 CODE:
1362 RETVAL = cctx_count; 3540 RETVAL = cctx_count;
1363 OUTPUT: 3541 OUTPUT:
1364 RETVAL 3542 RETVAL
1365 3543
1366int 3544int
1367cctx_idle () 3545cctx_idle ()
3546 PROTOTYPE:
1368 CODE: 3547 CODE:
1369 RETVAL = cctx_idle; 3548 RETVAL = cctx_idle;
1370 OUTPUT: 3549 OUTPUT:
1371 RETVAL 3550 RETVAL
1372 3551
1373void 3552void
1374list () 3553list ()
3554 PROTOTYPE:
1375 PPCODE: 3555 PPCODE:
1376{ 3556{
1377 struct coro *coro; 3557 struct coro *coro;
1378 for (coro = coro_first; coro; coro = coro->next) 3558 for (coro = coro_first; coro; coro = coro->next)
1379 if (coro->hv) 3559 if (coro->hv)
1380 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3560 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1381} 3561}
1382 3562
1383void 3563void
1384_eval (Coro::State coro, SV *coderef) 3564call (Coro::State coro, SV *coderef)
3565 ALIAS:
3566 eval = 1
1385 CODE: 3567 CODE:
1386{ 3568{
1387 if (coro->mainstack) 3569 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1388 { 3570 {
1389 struct coro temp; 3571 struct coro *current = SvSTATE_current;
1390 Zero (&temp, 1, struct coro); 3572 struct CoroSLF slf_save;
1391 temp.save = CORO_SAVE_ALL;
1392 3573
1393 if (!(coro->flags & CF_RUNNING)) 3574 if (current != coro)
1394 { 3575 {
3576 PUTBACK;
1395 save_perl (aTHX_ &temp); 3577 save_perl (aTHX_ current);
1396 load_perl (aTHX_ coro); 3578 load_perl (aTHX_ coro);
3579 /* the coro is most likely in an active SLF call.
3580 * while not strictly required (the code we execute is
3581 * not allowed to call any SLF functions), it's cleaner
3582 * to reinitialise the slf_frame and restore it later.
3583 * This might one day allow us to actually do SLF calls
3584 * from code executed here.
3585 */
3586 slf_save = slf_frame;
3587 slf_frame.prepare = 0;
3588 SPAGAIN;
1397 } 3589 }
1398 3590
1399 { 3591 PUSHSTACK;
1400 dSP; 3592
1401 ENTER;
1402 SAVETMPS;
1403 PUSHMARK (SP); 3593 PUSHMARK (SP);
1404 PUTBACK; 3594 PUTBACK;
3595
3596 if (ix)
3597 eval_sv (coderef, 0);
3598 else
1405 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3599 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3600
3601 POPSTACK;
1406 SPAGAIN; 3602 SPAGAIN;
1407 FREETMPS;
1408 LEAVE;
1409 PUTBACK;
1410 }
1411 3603
1412 if (!(coro->flags & CF_RUNNING)) 3604 if (current != coro)
1413 { 3605 {
3606 PUTBACK;
3607 slf_frame = slf_save;
1414 save_perl (aTHX_ coro); 3608 save_perl (aTHX_ coro);
1415 load_perl (aTHX_ &temp); 3609 load_perl (aTHX_ current);
3610 SPAGAIN;
1416 } 3611 }
1417 } 3612 }
1418} 3613}
1419 3614
1420SV * 3615SV *
1421is_ready (Coro::State coro) 3616is_ready (Coro::State coro)
1422 PROTOTYPE: $ 3617 PROTOTYPE: $
1423 ALIAS: 3618 ALIAS:
1424 is_ready = CF_READY 3619 is_ready = CF_READY
1425 is_running = CF_RUNNING 3620 is_running = CF_RUNNING
1426 is_new = CF_NEW 3621 is_new = CF_NEW
1427 is_destroyed = CF_DESTROYED 3622 is_destroyed = CF_ZOMBIE
3623 is_zombie = CF_ZOMBIE
3624 is_suspended = CF_SUSPENDED
1428 CODE: 3625 CODE:
1429 RETVAL = boolSV (coro->flags & ix); 3626 RETVAL = boolSV (coro->flags & ix);
1430 OUTPUT: 3627 OUTPUT:
1431 RETVAL 3628 RETVAL
1432 3629
3630void
3631throw (SV *self, SV *exception = &PL_sv_undef)
3632 PROTOTYPE: $;$
3633 CODE:
3634{
3635 struct coro *coro = SvSTATE (self);
3636 struct coro *current = SvSTATE_current;
3637 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3638 SvREFCNT_dec (*exceptionp);
3639 SvGETMAGIC (exception);
3640 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3641
3642 api_ready (aTHX_ self);
3643}
3644
3645void
3646api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3647 PROTOTYPE: $;$
3648 C_ARGS: aTHX_ coro, flags
3649
1433SV * 3650SV *
1434has_stack (Coro::State coro) 3651has_cctx (Coro::State coro)
1435 PROTOTYPE: $ 3652 PROTOTYPE: $
1436 CODE: 3653 CODE:
1437 RETVAL = boolSV (!!coro->cctx); 3654 /* maybe manage the running flag differently */
3655 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1438 OUTPUT: 3656 OUTPUT:
1439 RETVAL 3657 RETVAL
1440 3658
1441IV 3659int
3660is_traced (Coro::State coro)
3661 PROTOTYPE: $
3662 CODE:
3663 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3664 OUTPUT:
3665 RETVAL
3666
3667UV
1442rss (Coro::State coro) 3668rss (Coro::State coro)
1443 PROTOTYPE: $ 3669 PROTOTYPE: $
3670 ALIAS:
3671 usecount = 1
1444 CODE: 3672 CODE:
1445 RETVAL = coro_rss (coro); 3673 switch (ix)
3674 {
3675 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3676 case 1: RETVAL = coro->usecount; break;
3677 }
1446 OUTPUT: 3678 OUTPUT:
1447 RETVAL 3679 RETVAL
1448 3680
3681void
3682force_cctx ()
3683 PROTOTYPE:
3684 CODE:
3685 cctx_current->idle_sp = 0;
3686
3687void
3688swap_defsv (Coro::State self)
3689 PROTOTYPE: $
3690 ALIAS:
3691 swap_defav = 1
3692 CODE:
3693 if (!self->slot)
3694 croak ("cannot swap state with coroutine that has no saved state,");
3695 else
3696 {
3697 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3698 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3699
3700 SV *tmp = *src; *src = *dst; *dst = tmp;
3701 }
3702
3703void
3704cancel (Coro::State self)
3705 CODE:
3706 coro_state_destroy (aTHX_ self);
3707
3708SV *
3709enable_times (int enabled = enable_times)
3710 CODE:
3711{
3712 RETVAL = boolSV (enable_times);
3713
3714 if (enabled != enable_times)
3715 {
3716 enable_times = enabled;
3717
3718 coro_times_update ();
3719 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3720 }
3721}
3722 OUTPUT:
3723 RETVAL
3724
3725void
3726times (Coro::State self)
3727 PPCODE:
3728{
3729 struct coro *current = SvSTATE (coro_current);
3730
3731 if (ecb_expect_false (current == self))
3732 {
3733 coro_times_update ();
3734 coro_times_add (SvSTATE (coro_current));
3735 }
3736
3737 EXTEND (SP, 2);
3738 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3739 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3740
3741 if (ecb_expect_false (current == self))
3742 coro_times_sub (SvSTATE (coro_current));
3743}
3744
3745void
3746swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3747 CODE:
3748{
3749 struct coro *current = SvSTATE_current;
3750
3751 if (current == coro)
3752 SWAP_SVS (current);
3753
3754 if (!coro->swap_sv)
3755 coro->swap_sv = newAV ();
3756
3757 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3758 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3759
3760 if (current == coro)
3761 SWAP_SVS (current);
3762}
3763
1449 3764
1450MODULE = Coro::State PACKAGE = Coro 3765MODULE = Coro::State PACKAGE = Coro
1451 3766
1452BOOT: 3767BOOT:
1453{ 3768{
1454 int i;
1455
1456 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3769 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1457 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3770 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3771 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3772 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1458 av_async_pool = get_av ("Coro::async_pool", TRUE); 3773 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3774 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3775 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3776 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1459 3777
1460 coro_current = get_sv ("Coro::current", FALSE); 3778 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1461 SvREADONLY_on (coro_current); 3779 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3780 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3781 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
1462 3782
1463 coro_stash = gv_stashpv ("Coro", TRUE); 3783 coro_stash = gv_stashpv ("Coro", TRUE);
1464 3784
1465 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3785 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1466 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3786 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1467 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3787 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1468 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3788 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1469 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3789 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1470 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3790 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1471
1472 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1473 coro_ready[i] = newAV ();
1474 3791
1475 { 3792 {
1476 SV *sv = perl_get_sv("Coro::API", 1); 3793 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1477 3794
1478 coroapi.schedule = api_schedule; 3795 coroapi.schedule = api_schedule;
1479 coroapi.save = api_save; 3796 coroapi.schedule_to = api_schedule_to;
1480 coroapi.cede = api_cede; 3797 coroapi.cede = api_cede;
1481 coroapi.cede_notself = api_cede_notself; 3798 coroapi.cede_notself = api_cede_notself;
1482 coroapi.ready = api_ready; 3799 coroapi.ready = api_ready;
1483 coroapi.is_ready = api_is_ready; 3800 coroapi.is_ready = api_is_ready;
1484 coroapi.nready = &coro_nready; 3801 coroapi.nready = coro_nready;
1485 coroapi.current = coro_current; 3802 coroapi.current = coro_current;
1486 3803
1487 GCoroAPI = &coroapi; 3804 /*GCoroAPI = &coroapi;*/
1488 sv_setiv (sv, (IV)&coroapi); 3805 sv_setiv (sv, (IV)&coroapi);
1489 SvREADONLY_on (sv); 3806 SvREADONLY_on (sv);
1490 } 3807 }
1491} 3808}
3809
3810SV *
3811async (...)
3812 PROTOTYPE: &@
3813 CODE:
3814 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3815 api_ready (aTHX_ RETVAL);
3816 OUTPUT:
3817 RETVAL
3818
3819void
3820_destroy (Coro::State coro)
3821 CODE:
3822 /* used by the manager thread */
3823 coro_state_destroy (aTHX_ coro);
3824
3825void
3826on_destroy (Coro::State coro, SV *cb)
3827 CODE:
3828 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3829
3830void
3831join (...)
3832 CODE:
3833 CORO_EXECUTE_SLF_XS (slf_init_join);
3834
3835void
3836terminate (...)
3837 CODE:
3838 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3839
3840void
3841cancel (...)
3842 CODE:
3843 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3844
3845int
3846safe_cancel (Coro::State self, ...)
3847 C_ARGS: aTHX_ self, &ST (1), items - 1
3848
3849void
3850schedule (...)
3851 CODE:
3852 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3853
3854void
3855schedule_to (...)
3856 CODE:
3857 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3858
3859void
3860cede_to (...)
3861 CODE:
3862 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3863
3864void
3865cede (...)
3866 CODE:
3867 CORO_EXECUTE_SLF_XS (slf_init_cede);
3868
3869void
3870cede_notself (...)
3871 CODE:
3872 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1492 3873
1493void 3874void
1494_set_current (SV *current) 3875_set_current (SV *current)
1495 PROTOTYPE: $ 3876 PROTOTYPE: $
1496 CODE: 3877 CODE:
1497 SvREFCNT_dec (SvRV (coro_current)); 3878 SvREFCNT_dec (SvRV (coro_current));
1498 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3879 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3880
3881void
3882_set_readyhook (SV *hook)
3883 PROTOTYPE: $
3884 CODE:
3885 SvREFCNT_dec (coro_readyhook);
3886 SvGETMAGIC (hook);
3887 if (SvOK (hook))
3888 {
3889 coro_readyhook = newSVsv (hook);
3890 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3891 }
3892 else
3893 {
3894 coro_readyhook = 0;
3895 CORO_READYHOOK = 0;
3896 }
1499 3897
1500int 3898int
1501prio (Coro::State coro, int newprio = 0) 3899prio (Coro::State coro, int newprio = 0)
3900 PROTOTYPE: $;$
1502 ALIAS: 3901 ALIAS:
1503 nice = 1 3902 nice = 1
1504 CODE: 3903 CODE:
1505{ 3904{
1506 RETVAL = coro->prio; 3905 RETVAL = coro->prio;
… …
1508 if (items > 1) 3907 if (items > 1)
1509 { 3908 {
1510 if (ix) 3909 if (ix)
1511 newprio = coro->prio - newprio; 3910 newprio = coro->prio - newprio;
1512 3911
1513 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3912 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1514 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3913 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1515 3914
1516 coro->prio = newprio; 3915 coro->prio = newprio;
1517 } 3916 }
1518} 3917}
1519 OUTPUT: 3918 OUTPUT:
… …
1521 3920
1522SV * 3921SV *
1523ready (SV *self) 3922ready (SV *self)
1524 PROTOTYPE: $ 3923 PROTOTYPE: $
1525 CODE: 3924 CODE:
1526 RETVAL = boolSV (api_ready (self)); 3925 RETVAL = boolSV (api_ready (aTHX_ self));
1527 OUTPUT: 3926 OUTPUT:
1528 RETVAL 3927 RETVAL
1529 3928
1530int 3929int
1531nready (...) 3930nready (...)
… …
1533 CODE: 3932 CODE:
1534 RETVAL = coro_nready; 3933 RETVAL = coro_nready;
1535 OUTPUT: 3934 OUTPUT:
1536 RETVAL 3935 RETVAL
1537 3936
1538# for async_pool speedup
1539void 3937void
1540_pool_1 (SV *cb) 3938suspend (Coro::State self)
3939 PROTOTYPE: $
1541 CODE: 3940 CODE:
1542{ 3941 self->flags |= CF_SUSPENDED;
1543 int i, len;
1544 HV *hv = (HV *)SvRV (coro_current);
1545 AV *defav = GvAV (PL_defgv);
1546 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1547 AV *invoke_av;
1548 3942
1549 if (!invoke) 3943void
1550 croak ("\3terminate\2\n"); 3944resume (Coro::State self)
3945 PROTOTYPE: $
3946 CODE:
3947 self->flags &= ~CF_SUSPENDED;
1551 3948
1552 hv_store (hv, "desc", sizeof ("desc") - 1, 3949void
1553 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3950_pool_handler (...)
3951 CODE:
3952 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1554 3953
1555 invoke_av = (AV *)SvRV (invoke); 3954void
1556 len = av_len (invoke_av); 3955async_pool (SV *cv, ...)
3956 PROTOTYPE: &@
3957 PPCODE:
3958{
3959 HV *hv = (HV *)av_pop (av_async_pool);
3960 AV *av = newAV ();
3961 SV *cb = ST (0);
3962 int i;
1557 3963
1558 sv_setsv (cb, AvARRAY (invoke_av)[0]); 3964 av_extend (av, items - 2);
3965 for (i = 1; i < items; ++i)
3966 av_push (av, SvREFCNT_inc_NN (ST (i)));
1559 3967
1560 if (len > 0) 3968 if ((SV *)hv == &PL_sv_undef)
1561 { 3969 {
1562 av_fill (defav, len - 1); 3970 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1563 for (i = 0; i < len; ++i) 3971 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1564 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3972 SvREFCNT_dec (sv);
1565 } 3973 }
1566 3974
3975 {
3976 struct coro *coro = SvSTATE_hv (hv);
3977
3978 assert (!coro->invoke_cb);
3979 assert (!coro->invoke_av);
3980 coro->invoke_cb = SvREFCNT_inc (cb);
3981 coro->invoke_av = av;
3982 }
3983
3984 api_ready (aTHX_ (SV *)hv);
3985
3986 if (GIMME_V != G_VOID)
3987 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3988 else
1567 SvREFCNT_dec (invoke); 3989 SvREFCNT_dec (hv);
1568} 3990}
1569 3991
1570void 3992SV *
1571_pool_2 (SV *cb) 3993rouse_cb ()
3994 PROTOTYPE:
1572 CODE: 3995 CODE:
1573{ 3996 RETVAL = coro_new_rouse_cb (aTHX);
1574 struct coro *coro = SvSTATE (coro_current);
1575
1576 sv_setsv (cb, &PL_sv_undef);
1577
1578 if (coro_rss (coro) > SvIV (sv_pool_rss)
1579 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1580 croak ("\3terminate\2\n");
1581
1582 av_clear (GvAV (PL_defgv));
1583 hv_store (SvRV (coro_current), "desc", sizeof ("desc") - 1,
1584 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1585 coro->save = CORO_SAVE_DEF;
1586 coro->prio = 0;
1587 av_push (av_async_pool, newSVsv (coro_current));
1588}
1589
1590
1591MODULE = Coro::State PACKAGE = Coro::AIO
1592
1593SV *
1594_get_state ()
1595 CODE:
1596{
1597 struct io_state *data;
1598
1599 RETVAL = newSV (sizeof (struct io_state));
1600 data = (struct io_state *)SvPVX (RETVAL);
1601 SvCUR_set (RETVAL, sizeof (struct io_state));
1602 SvPOK_only (RETVAL);
1603
1604 data->errorno = errno;
1605 data->laststype = PL_laststype;
1606 data->laststatval = PL_laststatval;
1607 data->statcache = PL_statcache;
1608}
1609 OUTPUT: 3997 OUTPUT:
1610 RETVAL 3998 RETVAL
1611 3999
1612void 4000void
1613_set_state (char *data_) 4001rouse_wait (...)
4002 PROTOTYPE: ;$
4003 PPCODE:
4004 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4005
4006void
4007on_enter (SV *block)
4008 ALIAS:
4009 on_leave = 1
1614 PROTOTYPE: $ 4010 PROTOTYPE: &
1615 CODE: 4011 CODE:
1616{ 4012{
1617 struct io_state *data = (void *)data_; 4013 struct coro *coro = SvSTATE_current;
4014 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1618 4015
1619 errno = data->errorno; 4016 block = s_get_cv_croak (block);
1620 PL_laststype = data->laststype;
1621 PL_laststatval = data->laststatval;
1622 PL_statcache = data->statcache;
1623}
1624 4017
4018 if (!*avp)
4019 *avp = newAV ();
4020
4021 av_push (*avp, SvREFCNT_inc (block));
4022
4023 if (!ix)
4024 on_enterleave_call (aTHX_ block);
4025
4026 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4027 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4028 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4029}
4030
4031
4032MODULE = Coro::State PACKAGE = PerlIO::cede
4033
4034BOOT:
4035 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4036
4037
4038MODULE = Coro::State PACKAGE = Coro::Semaphore
4039
4040SV *
4041new (SV *klass, SV *count = 0)
4042 CODE:
4043{
4044 int semcnt = 1;
4045
4046 if (count)
4047 {
4048 SvGETMAGIC (count);
4049
4050 if (SvOK (count))
4051 semcnt = SvIV (count);
4052 }
4053
4054 RETVAL = sv_bless (
4055 coro_waitarray_new (aTHX_ semcnt),
4056 GvSTASH (CvGV (cv))
4057 );
4058}
4059 OUTPUT:
4060 RETVAL
4061
4062# helper for Coro::Channel and others
4063SV *
4064_alloc (int count)
4065 CODE:
4066 RETVAL = coro_waitarray_new (aTHX_ count);
4067 OUTPUT:
4068 RETVAL
4069
4070SV *
4071count (SV *self)
4072 CODE:
4073 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4074 OUTPUT:
4075 RETVAL
4076
4077void
4078up (SV *self, int adjust = 1)
4079 ALIAS:
4080 adjust = 1
4081 CODE:
4082 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4083
4084void
4085down (...)
4086 CODE:
4087 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4088
4089void
4090wait (...)
4091 CODE:
4092 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4093
4094void
4095try (SV *self)
4096 PPCODE:
4097{
4098 AV *av = (AV *)SvRV (self);
4099 SV *count_sv = AvARRAY (av)[0];
4100 IV count = SvIVX (count_sv);
4101
4102 if (count > 0)
4103 {
4104 --count;
4105 SvIVX (count_sv) = count;
4106 XSRETURN_YES;
4107 }
4108 else
4109 XSRETURN_NO;
4110}
4111
4112void
4113waiters (SV *self)
4114 PPCODE:
4115{
4116 AV *av = (AV *)SvRV (self);
4117 int wcount = AvFILLp (av) + 1 - 1;
4118
4119 if (GIMME_V == G_SCALAR)
4120 XPUSHs (sv_2mortal (newSViv (wcount)));
4121 else
4122 {
4123 int i;
4124 EXTEND (SP, wcount);
4125 for (i = 1; i <= wcount; ++i)
4126 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4127 }
4128}
4129
4130MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4131
4132void
4133_may_delete (SV *sem, int count, unsigned int extra_refs)
4134 PPCODE:
4135{
4136 AV *av = (AV *)SvRV (sem);
4137
4138 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4139 && AvFILLp (av) == 0 /* no waiters, just count */
4140 && SvIV (AvARRAY (av)[0]) == count)
4141 XSRETURN_YES;
4142
4143 XSRETURN_NO;
4144}
4145
4146MODULE = Coro::State PACKAGE = Coro::Signal
4147
4148SV *
4149new (SV *klass)
4150 CODE:
4151 RETVAL = sv_bless (
4152 coro_waitarray_new (aTHX_ 0),
4153 GvSTASH (CvGV (cv))
4154 );
4155 OUTPUT:
4156 RETVAL
4157
4158void
4159wait (...)
4160 CODE:
4161 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4162
4163void
4164broadcast (SV *self)
4165 CODE:
4166{
4167 AV *av = (AV *)SvRV (self);
4168 coro_signal_wake (aTHX_ av, AvFILLp (av));
4169}
4170
4171void
4172send (SV *self)
4173 CODE:
4174{
4175 AV *av = (AV *)SvRV (self);
4176
4177 if (AvFILLp (av))
4178 coro_signal_wake (aTHX_ av, 1);
4179 else
4180 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4181}
4182
4183IV
4184awaited (SV *self)
4185 CODE:
4186 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4187 OUTPUT:
4188 RETVAL
4189
4190
4191MODULE = Coro::State PACKAGE = Coro::AnyEvent
4192
4193BOOT:
4194 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4195
4196void
4197_schedule (...)
4198 CODE:
4199{
4200 static int incede;
4201
4202 api_cede_notself (aTHX);
4203
4204 ++incede;
4205 while (coro_nready >= incede && api_cede (aTHX))
4206 ;
4207
4208 sv_setsv (sv_activity, &PL_sv_undef);
4209 if (coro_nready >= incede)
4210 {
4211 PUSHMARK (SP);
4212 PUTBACK;
4213 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4214 }
4215
4216 --incede;
4217}
4218
4219
4220MODULE = Coro::State PACKAGE = Coro::AIO
4221
4222void
4223_register (char *target, char *proto, SV *req)
4224 CODE:
4225{
4226 SV *req_cv = s_get_cv_croak (req);
4227 /* newXSproto doesn't return the CV on 5.8 */
4228 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4229 sv_setpv ((SV *)slf_cv, proto);
4230 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4231}
4232
4233MODULE = Coro::State PACKAGE = Coro::Select
4234
4235void
4236patch_pp_sselect ()
4237 CODE:
4238 if (!coro_old_pp_sselect)
4239 {
4240 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4241 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4242 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4243 }
4244
4245void
4246unpatch_pp_sselect ()
4247 CODE:
4248 if (coro_old_pp_sselect)
4249 {
4250 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4251 coro_old_pp_sselect = 0;
4252 }
4253
4254MODULE = Coro::State PACKAGE = Coro::Util
4255
4256void
4257_exit (int code)
4258 CODE:
4259 _exit (code);
4260
4261NV
4262time ()
4263 CODE:
4264 RETVAL = nvtime (aTHX);
4265 OUTPUT:
4266 RETVAL
4267
4268NV
4269gettimeofday ()
4270 PPCODE:
4271{
4272 UV tv [2];
4273 u2time (aTHX_ tv);
4274 EXTEND (SP, 2);
4275 PUSHs (sv_2mortal (newSVuv (tv [0])));
4276 PUSHs (sv_2mortal (newSVuv (tv [1])));
4277}
4278

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