ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.192 by root, Fri Oct 5 21:51:40 2007 UTC vs.
Revision 1.462 by root, Wed Jun 22 20:24:38 2016 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
18#define ECB_NO_THREADS 1
19#define ECB_NO_LIBM 1
20#include "ecb.h"
21
22#include <stddef.h>
11#include <stdio.h> 23#include <stdio.h>
12#include <errno.h> 24#include <errno.h>
13#include <assert.h> 25#include <assert.h>
14 26
15#ifdef HAVE_MMAP 27#ifndef SvREFCNT_dec_NN
16# include <unistd.h> 28 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
17# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS
19# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON
21# else
22# undef HAVE_MMAP
23# endif 29#endif
30
31#ifndef SvREFCNT_inc_NN
32 #define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
33#endif
34
35#ifndef SVs_PADSTALE
36# define SVs_PADSTALE 0
37#endif
38
39#ifdef PadARRAY
40# define NEWPADAPI 1
41# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
42#else
43typedef AV PADNAMELIST;
44# if !PERL_VERSION_ATLEAST(5,8,0)
45typedef AV PADLIST;
46typedef AV PAD;
24# endif 47# endif
25# include <limits.h> 48# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
26# ifndef PAGESIZE 49# define PadlistMAX(pl) AvFILLp (pl)
27# define PAGESIZE pagesize 50# define PadlistNAMES(pl) (*PadlistARRAY (pl))
28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 51# define PadARRAY AvARRAY
29static long pagesize; 52# define PadMAX AvFILLp
30# else 53# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
31# define BOOT_PAGESIZE (void)0
32# endif 54#endif
55#ifndef PadnamelistREFCNT
56# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
57#endif
58#ifndef PadnamelistREFCNT_dec
59# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
60#endif
61
62/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
63/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
64#if PERL_VERSION_ATLEAST(5,19,0)
65# define SVt_BIND SVt_IV
66#endif
67
68#if defined(_WIN32)
69# undef HAS_GETTIMEOFDAY
70# undef setjmp
71# undef longjmp
72# undef _exit
73# define setjmp _setjmp /* deep magic */
33#else 74#else
34# define PAGESIZE 0 75# 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 76#endif
44 77
45/* the maximum number of idle cctx that will be pooled */ 78/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 79static int cctx_max_idle = 4;
47 80
48#define PERL_VERSION_ATLEAST(a,b,c) \ 81#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
49 (PERL_REVISION > (a) \ 82# 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/* 5.8.8 */
81#ifndef GV_NOTQUAL
82# define GV_NOTQUAL 0
83#endif
84#ifndef newSV
85# define newSV(l) NEWSV(0,l)
86#endif
87
88#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
89# undef CORO_STACKGUARD
90#endif
91
92#ifndef CORO_STACKGUARD
93# define CORO_STACKGUARD 0
94#endif 83#endif
95 84
96/* prefer perl internal functions over our own? */ 85/* prefer perl internal functions over our own? */
97#ifndef CORO_PREFER_PERL_FUNCTIONS 86#ifndef CORO_PREFER_PERL_FUNCTIONS
98# define CORO_PREFER_PERL_FUNCTIONS 0 87# define CORO_PREFER_PERL_FUNCTIONS 0
99#endif 88#endif
100 89
101/* The next macros try to return the current stack pointer, in an as 90/* The next macros try to return the current stack pointer, in an as
102 * portable way as possible. */ 91 * portable way as possible. */
103#define dSTACKLEVEL volatile char stacklevel
104#define STACKLEVEL ((void *)&stacklevel)
105
106#define IN_DESTRUCT (PL_main_cv == Nullcv)
107
108#if __GNUC__ >= 3 92#if __GNUC__ >= 4
109# define attribute(x) __attribute__(x) 93# define dSTACKLEVEL int stacklevel_dummy
110# define BARRIER __asm__ __volatile__ ("" : : : "memory") 94# define STACKLEVEL __builtin_frame_address (0)
111#else 95#else
112# define attribute(x) 96# define dSTACKLEVEL volatile void *stacklevel
113# define BARRIER 97# define STACKLEVEL ((void *)&stacklevel)
114#endif 98#endif
115 99
116#define NOINLINE attribute ((noinline)) 100#define IN_DESTRUCT PL_dirty
117 101
118#include "CoroAPI.h" 102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
119 104
120#ifdef USE_ITHREADS 105#ifdef USE_ITHREADS
121static perl_mutex coro_mutex; 106# if CORO_PTHREAD
122# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 107static void *coro_thx;
123# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
124#else
125# define LOCK (void)0
126# define UNLOCK (void)0
127#endif 108# endif
109#endif
128 110
129/* helper storage struct for Coro::AIO */ 111#ifdef __linux
130struct io_state 112# include <time.h> /* for timespec */
131{ 113# include <syscall.h> /* for SYS_* */
132 int errorno; 114# ifdef SYS_clock_gettime
133 I32 laststype; 115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
134 int laststatval; 116# define CORO_CLOCK_MONOTONIC 1
135 Stat_t statcache; 117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
136}; 118# endif
119#endif
137 120
121static double (*nvtime)(); /* so why doesn't it take void? */
122static void (*u2time)(pTHX_ UV ret[2]);
123
124/* we hijack an hopefully unused CV flag for our purposes */
125#define CVf_SLF 0x4000
126static OP *pp_slf (pTHX);
127static void slf_destroy (pTHX_ struct coro *coro);
128
129static U32 cctx_gen;
138static size_t coro_stacksize = CORO_STACKSIZE; 130static size_t cctx_stacksize = CORO_STACKSIZE;
139static struct CoroAPI coroapi; 131static struct CoroAPI coroapi;
140static AV *main_mainstack; /* used to differentiate between $main and others */ 132static AV *main_mainstack; /* used to differentiate between $main and others */
141static JMPENV *main_top_env; 133static JMPENV *main_top_env;
142static HV *coro_state_stash, *coro_stash; 134static HV *coro_state_stash, *coro_stash;
143static SV *coro_mortal; /* will be freed after next transfer */ 135static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
136
137static AV *av_destroy; /* destruction queue */
138static SV *sv_manager; /* the manager coro */
139static SV *sv_idle; /* $Coro::idle */
144 140
145static GV *irsgv; /* $/ */ 141static GV *irsgv; /* $/ */
146static GV *stdoutgv; /* *STDOUT */ 142static GV *stdoutgv; /* *STDOUT */
143static SV *rv_diehook;
144static SV *rv_warnhook;
147 145
148/* async_pool helper stuff */ 146/* async_pool helper stuff */
149static SV *sv_pool_rss; 147static SV *sv_pool_rss;
150static SV *sv_pool_size; 148static SV *sv_pool_size;
149static SV *sv_async_pool_idle; /* description string */
151static AV *av_async_pool; 150static AV *av_async_pool; /* idle pool */
151static SV *sv_Coro; /* class string */
152static CV *cv_pool_handler;
153
154/* Coro::AnyEvent */
155static SV *sv_activity;
156
157/* enable processtime/realtime profiling */
158static char enable_times;
159typedef U32 coro_ts[2];
160static coro_ts time_real, time_cpu;
161static char times_valid;
152 162
153static struct coro_cctx *cctx_first; 163static struct coro_cctx *cctx_first;
154static int cctx_count, cctx_idle; 164static int cctx_count, cctx_idle;
155 165
156enum { 166enum
167{
157 CC_MAPPED = 0x01, 168 CC_MAPPED = 0x01,
158 CC_NOREUSE = 0x02, /* throw this away after tracing */ 169 CC_NOREUSE = 0x02, /* throw this away after tracing */
159 CC_TRACE = 0x04, 170 CC_TRACE = 0x04,
160 CC_TRACE_SUB = 0x08, /* trace sub calls */ 171 CC_TRACE_SUB = 0x08, /* trace sub calls */
161 CC_TRACE_LINE = 0x10, /* trace each statement */ 172 CC_TRACE_LINE = 0x10, /* trace each statement */
162 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 173 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
163}; 174};
164 175
165/* this is a structure representing a c-level coroutine */ 176/* this is a structure representing a c-level coroutine */
166typedef struct coro_cctx { 177typedef struct coro_cctx
178{
167 struct coro_cctx *next; 179 struct coro_cctx *next;
168 180
169 /* the stack */ 181 /* the stack */
170 void *sptr; 182 struct coro_stack stack;
171 size_t ssize;
172 183
173 /* cpu state */ 184 /* cpu state */
174 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186#ifndef NDEBUG
175 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 187 JMPENV *idle_te; /* same as idle_sp, but for top_env */
188#endif
176 JMPENV *top_env; 189 JMPENV *top_env;
177 coro_context cctx; 190 coro_context cctx;
178 191
192 U32 gen;
179#if CORO_USE_VALGRIND 193#if CORO_USE_VALGRIND
180 int valgrind_id; 194 int valgrind_id;
181#endif 195#endif
182 unsigned char flags; 196 unsigned char flags;
183} coro_cctx; 197} coro_cctx;
184 198
199static coro_cctx *cctx_current; /* the currently running cctx */
200
201/*****************************************************************************/
202
203static MGVTBL coro_state_vtbl;
204
185enum { 205enum
206{
186 CF_RUNNING = 0x0001, /* coroutine is running */ 207 CF_RUNNING = 0x0001, /* coroutine is running */
187 CF_READY = 0x0002, /* coroutine is ready */ 208 CF_READY = 0x0002, /* coroutine is ready */
188 CF_NEW = 0x0004, /* has never been switched to */ 209 CF_NEW = 0x0004, /* has never been switched to */
189 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 210 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
211 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
212 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
190}; 213};
191 214
215/* the structure where most of the perl state is stored, overlaid on the cxstack */
216typedef struct
217{
218 #define VARx(name,expr,type) type name;
219 #include "state.h"
220} perl_slots;
221
222/* how many context stack entries do we need for perl_slots */
223#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
224
192/* this is a structure representing a perl-level coroutine */ 225/* this is a structure representing a perl-level coroutine */
193struct coro { 226struct coro
227{
194 /* the c coroutine allocated to this perl coroutine, if any */ 228 /* the C coroutine allocated to this perl coroutine, if any */
195 coro_cctx *cctx; 229 coro_cctx *cctx;
196 230
231 /* ready queue */
232 struct coro *next_ready;
233
234 /* state data */
235 struct CoroSLF slf_frame; /* saved slf frame */
236 AV *mainstack;
237 perl_slots *slot; /* basically the saved sp */
238
239 CV *startcv; /* the CV to execute */
197 /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
198 AV *args;
199 int refcnt;
200 int flags; /* CF_ flags */ 241 int flags; /* CF_ flags */
201 242 HV *hv; /* the perl hash associated with this coro, if any */
202 /* optionally saved, might be zero */
203 AV *defav; /* @_ */
204 SV *defsv; /* $_ */
205 SV *errsv; /* $@ */
206 SV *deffh; /* default filehandle */
207 SV *irssv; /* $/ */
208 SV *irssv_sv; /* real $/ cache */
209
210#define VAR(name,type) type name;
211# include "state.h"
212#undef VAR
213 243
214 /* statistics */ 244 /* statistics */
215 int usecount; /* number of transfers to this coro */ 245 int usecount; /* number of transfers to this coro */
216 246
217 /* coro process data */ 247 /* coro process data */
218 int prio; 248 int prio;
219 //SV *throw; 249 SV *except; /* exception to be thrown */
250 SV *rouse_cb; /* last rouse callback */
251 AV *on_destroy; /* callbacks or coros to notify on destroy */
252 AV *status; /* the exit status list */
220 253
221 /* async_pool */ 254 /* async_pool */
222 SV *saved_deffh; 255 SV *saved_deffh;
256 SV *invoke_cb;
257 AV *invoke_av;
258
259 /* on_enter/on_leave */
260 AV *on_enter; AV *on_enter_xs;
261 AV *on_leave; AV *on_leave_xs;
262
263 /* swap_sv */
264 AV *swap_sv;
265
266 /* times */
267 coro_ts t_cpu, t_real;
223 268
224 /* linked list */ 269 /* linked list */
225 struct coro *next, *prev; 270 struct coro *next, *prev;
226 HV *hv; /* the perl hash associated with this coro, if any */
227}; 271};
228 272
229typedef struct coro *Coro__State; 273typedef struct coro *Coro__State;
230typedef struct coro *Coro__State_or_hashref; 274typedef struct coro *Coro__State_or_hashref;
231 275
276/* the following variables are effectively part of the perl context */
277/* and get copied between struct coro and these variables */
278/* the main reason we don't support windows process emulation */
279static struct CoroSLF slf_frame; /* the current slf frame */
280
232/** Coro ********************************************************************/ 281/** Coro ********************************************************************/
233 282
234#define PRIO_MAX 3 283#define CORO_PRIO_MAX 3
235#define PRIO_HIGH 1 284#define CORO_PRIO_HIGH 1
236#define PRIO_NORMAL 0 285#define CORO_PRIO_NORMAL 0
237#define PRIO_LOW -1 286#define CORO_PRIO_LOW -1
238#define PRIO_IDLE -3 287#define CORO_PRIO_IDLE -3
239#define PRIO_MIN -4 288#define CORO_PRIO_MIN -4
240 289
241/* for Coro.pm */ 290/* for Coro.pm */
242static SV *coro_current; 291static SV *coro_current;
243static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 292static SV *coro_readyhook;
244static int coro_nready; 293static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
294static CV *cv_coro_run;
245static struct coro *coro_first; 295static struct coro *coro_first;
296#define coro_nready coroapi.nready
297
298/** JIT *********************************************************************/
299
300#if CORO_JIT
301 /* APPLE doesn't have mmap though */
302 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
303 #ifndef CORO_JIT_TYPE
304 #if ECB_AMD64 && CORO_JIT_UNIXY
305 #define CORO_JIT_TYPE "amd64-unix"
306 #elif __i386 && CORO_JIT_UNIXY
307 #define CORO_JIT_TYPE "x86-unix"
308 #endif
309 #endif
310#endif
311
312#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
313 #undef CORO_JIT
314#endif
315
316#if CORO_JIT
317 typedef void (*load_save_perl_slots_type)(perl_slots *);
318 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
319#endif
320
321/** Coro::Select ************************************************************/
322
323static OP *(*coro_old_pp_sselect) (pTHX);
324static SV *coro_select_select;
325
326/* horrible hack, but if it works... */
327static OP *
328coro_pp_sselect (pTHX)
329{
330 dSP;
331 PUSHMARK (SP - 4); /* fake argument list */
332 XPUSHs (coro_select_select);
333 PUTBACK;
334
335 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
336 PL_op->op_flags |= OPf_STACKED;
337 PL_op->op_private = 0;
338 return PL_ppaddr [OP_ENTERSUB](aTHX);
339}
340
341/** time stuff **************************************************************/
342
343#ifdef HAS_GETTIMEOFDAY
344
345ecb_inline void
346coro_u2time (pTHX_ UV ret[2])
347{
348 struct timeval tv;
349 gettimeofday (&tv, 0);
350
351 ret [0] = tv.tv_sec;
352 ret [1] = tv.tv_usec;
353}
354
355ecb_inline double
356coro_nvtime (void)
357{
358 struct timeval tv;
359 gettimeofday (&tv, 0);
360
361 return tv.tv_sec + tv.tv_usec * 1e-6;
362}
363
364ecb_inline void
365time_init (pTHX)
366{
367 nvtime = coro_nvtime;
368 u2time = coro_u2time;
369}
370
371#else
372
373ecb_inline void
374time_init (pTHX)
375{
376 SV **svp;
377
378 require_pv ("Time/HiRes.pm");
379
380 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
381
382 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
383 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
384
385 nvtime = INT2PTR (double (*)(), SvIV (*svp));
386
387 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
388 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
389}
390
391#endif
246 392
247/** lowlevel stuff **********************************************************/ 393/** lowlevel stuff **********************************************************/
248 394
249static AV * 395static SV * ecb_noinline
396coro_get_sv (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_sv (name, create);
401#endif
402 return get_sv (name, create);
403}
404
405static AV * ecb_noinline
406coro_get_av (pTHX_ const char *name, int create)
407{
408#if PERL_VERSION_ATLEAST (5,10,0)
409 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
410 get_av (name, create);
411#endif
412 return get_av (name, create);
413}
414
415static HV * ecb_noinline
416coro_get_hv (pTHX_ const char *name, int create)
417{
418#if PERL_VERSION_ATLEAST (5,10,0)
419 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
420 get_hv (name, create);
421#endif
422 return get_hv (name, create);
423}
424
425ecb_inline void
426coro_times_update (void)
427{
428#ifdef coro_clock_gettime
429 struct timespec ts;
430
431 ts.tv_sec = ts.tv_nsec = 0;
432 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
433 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
434
435 ts.tv_sec = ts.tv_nsec = 0;
436 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
437 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
438#else
439 dTHX;
440 UV tv[2];
441
442 u2time (aTHX_ tv);
443 time_real [0] = tv [0];
444 time_real [1] = tv [1] * 1000;
445#endif
446}
447
448ecb_inline void
449coro_times_add (struct coro *c)
450{
451 c->t_real [1] += time_real [1];
452 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
453 c->t_real [0] += time_real [0];
454
455 c->t_cpu [1] += time_cpu [1];
456 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
457 c->t_cpu [0] += time_cpu [0];
458}
459
460ecb_inline void
461coro_times_sub (struct coro *c)
462{
463 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
464 c->t_real [1] -= time_real [1];
465 c->t_real [0] -= time_real [0];
466
467 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
468 c->t_cpu [1] -= time_cpu [1];
469 c->t_cpu [0] -= time_cpu [0];
470}
471
472/*****************************************************************************/
473/* magic glue */
474
475#define CORO_MAGIC_type_cv 26
476#define CORO_MAGIC_type_state PERL_MAGIC_ext
477
478#define CORO_MAGIC_NN(sv, type) \
479 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
480 ? SvMAGIC (sv) \
481 : mg_find (sv, type))
482
483#define CORO_MAGIC(sv, type) \
484 (ecb_expect_true (SvMAGIC (sv)) \
485 ? CORO_MAGIC_NN (sv, type) \
486 : 0)
487
488#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
489#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
490
491ecb_inline MAGIC *
492SvSTATEhv_p (pTHX_ SV *coro)
493{
494 MAGIC *mg;
495
496 if (ecb_expect_true (
497 SvTYPE (coro) == SVt_PVHV
498 && (mg = CORO_MAGIC_state (coro))
499 && mg->mg_virtual == &coro_state_vtbl
500 ))
501 return mg;
502
503 return 0;
504}
505
506ecb_inline struct coro *
507SvSTATE_ (pTHX_ SV *coro_sv)
508{
509 MAGIC *mg;
510
511 if (SvROK (coro_sv))
512 coro_sv = SvRV (coro_sv);
513
514 mg = SvSTATEhv_p (aTHX_ coro_sv);
515 if (!mg)
516 croak ("Coro::State object required");
517
518 return (struct coro *)mg->mg_ptr;
519}
520
521#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
522
523/* faster than SvSTATE, but expects a coroutine hv */
524#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
525#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
526
527/*****************************************************************************/
528/* padlist management and caching */
529
530ecb_inline PADLIST *
250coro_clone_padlist (pTHX_ CV *cv) 531coro_derive_padlist (pTHX_ CV *cv)
251{ 532{
252 AV *padlist = CvPADLIST (cv); 533 PADLIST *padlist = CvPADLIST (cv);
253 AV *newpadlist, *newpad; 534 PADLIST *newpadlist;
535 PADNAMELIST *padnames;
536 PAD *newpad;
537 PADOFFSET off = PadlistMAX (padlist) + 1;
254 538
255 newpadlist = newAV (); 539#if NEWPADAPI
540
541 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
542 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
543 while (!PadlistARRAY (padlist)[off - 1])
544 --off;
545
546 Perl_pad_push (aTHX_ padlist, off);
547
548 newpad = PadlistARRAY (padlist)[off];
549 PadlistARRAY (padlist)[off] = 0;
550
551#else
552
553#if PERL_VERSION_ATLEAST (5,10,0)
554 Perl_pad_push (aTHX_ padlist, off);
555#else
556 Perl_pad_push (aTHX_ padlist, off, 1);
557#endif
558
559 newpad = PadlistARRAY (padlist)[off];
560 PadlistMAX (padlist) = off - 1;
561
562#endif
563
564 newPADLIST (newpadlist);
565#if !PERL_VERSION_ATLEAST(5,15,3)
566 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
256 AvREAL_off (newpadlist); 567 AvREAL_off (newpadlist);
257#if PERL_VERSION_ATLEAST (5,9,0)
258 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
259#else
260 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
261#endif 568#endif
262 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
263 --AvFILLp (padlist);
264 569
265 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 570 /* Already extended to 2 elements by newPADLIST. */
266 av_store (newpadlist, 1, (SV *)newpad); 571 PadlistMAX (newpadlist) = 1;
572
573 padnames = PadlistNAMES (padlist);
574 ++PadnamelistREFCNT (padnames);
575 PadlistNAMES (newpadlist) = padnames;
576
577 PadlistARRAY (newpadlist)[1] = newpad;
267 578
268 return newpadlist; 579 return newpadlist;
269} 580}
270 581
271static void 582ecb_inline void
272free_padlist (pTHX_ AV *padlist) 583free_padlist (pTHX_ PADLIST *padlist)
273{ 584{
274 /* may be during global destruction */ 585 /* may be during global destruction */
275 if (SvREFCNT (padlist)) 586 if (!IN_DESTRUCT)
276 { 587 {
277 I32 i = AvFILLp (padlist); 588 I32 i = PadlistMAX (padlist);
278 while (i >= 0) 589
590 while (i > 0) /* special-case index 0 */
279 { 591 {
280 SV **svp = av_fetch (padlist, i--, FALSE); 592 /* we try to be extra-careful here */
593 PAD *pad = PadlistARRAY (padlist)[i--];
594
281 if (svp) 595 if (pad)
282 { 596 {
283 SV *sv; 597 I32 j = PadMAX (pad);
284 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 598
599 while (j >= 0)
285 SvREFCNT_dec (sv); 600 SvREFCNT_dec (PadARRAY (pad)[j--]);
286 601
602 PadMAX (pad) = -1;
287 SvREFCNT_dec (*svp); 603 SvREFCNT_dec (pad);
288 } 604 }
289 } 605 }
290 606
607 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
608
609#if NEWPADAPI
610 Safefree (PadlistARRAY (padlist));
611 Safefree (padlist);
612#else
613 AvFILLp (padlist) = -1;
614 AvREAL_off (padlist);
291 SvREFCNT_dec ((SV*)padlist); 615 SvREFCNT_dec ((SV*)padlist);
616#endif
292 } 617 }
293} 618}
294 619
295static int 620static int
296coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 621coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
297{ 622{
298 AV *padlist; 623 PADLIST *padlist;
299 AV *av = (AV *)mg->mg_obj; 624 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
625 size_t len = *(size_t *)mg->mg_ptr;
300 626
301 /* casting is fun. */ 627 /* perl manages to free our internal AV and _then_ call us */
302 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 628 if (IN_DESTRUCT)
629 return 0;
630
631 while (len--)
303 free_padlist (aTHX_ padlist); 632 free_padlist (aTHX_ padlists[len]);
304
305 SvREFCNT_dec (av);
306 633
307 return 0; 634 return 0;
308} 635}
309 636
310#define PERL_MAGIC_coro PERL_MAGIC_ext 637static MGVTBL coro_cv_vtbl = {
311 638 0, 0, 0, 0,
312static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 639 coro_cv_free
313 640};
314#define CORO_MAGIC(cv) \
315 SvMAGIC (cv) \
316 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
317 ? SvMAGIC (cv) \
318 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
319 : 0
320
321static struct coro *
322SvSTATE_ (pTHX_ SV *coro)
323{
324 HV *stash;
325 MAGIC *mg;
326
327 if (SvROK (coro))
328 coro = SvRV (coro);
329
330 if (SvTYPE (coro) != SVt_PVHV)
331 croak ("Coro::State object required");
332
333 stash = SvSTASH (coro);
334 if (stash != coro_stash && stash != coro_state_stash)
335 {
336 /* very slow, but rare, check */
337 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
338 croak ("Coro::State object required");
339 }
340
341 mg = CORO_MAGIC (coro);
342 return (struct coro *)mg->mg_ptr;
343}
344
345#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
346 641
347/* the next two functions merely cache the padlists */ 642/* the next two functions merely cache the padlists */
348static void 643ecb_inline void
349get_padlist (pTHX_ CV *cv) 644get_padlist (pTHX_ CV *cv)
350{ 645{
351 MAGIC *mg = CORO_MAGIC (cv); 646 MAGIC *mg = CORO_MAGIC_cv (cv);
352 AV *av; 647 size_t *lenp;
353 648
354 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 649 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
355 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 650 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
356 else 651 else
357 { 652 {
358#if CORO_PREFER_PERL_FUNCTIONS 653#if CORO_PREFER_PERL_FUNCTIONS
359 /* this is probably cleaner, but also slower? */ 654 /* this is probably cleaner? but also slower! */
655 /* in practise, it seems to be less stable */
360 CV *cp = Perl_cv_clone (cv); 656 CV *cp = Perl_cv_clone (aTHX_ cv);
361 CvPADLIST (cv) = CvPADLIST (cp); 657 CvPADLIST (cv) = CvPADLIST (cp);
362 CvPADLIST (cp) = 0; 658 CvPADLIST (cp) = 0;
363 SvREFCNT_dec (cp); 659 SvREFCNT_dec (cp);
364#else 660#else
365 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 661 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
366#endif 662#endif
367 } 663 }
368} 664}
369 665
370static void 666ecb_inline void
371put_padlist (pTHX_ CV *cv) 667put_padlist (pTHX_ CV *cv)
372{ 668{
373 MAGIC *mg = CORO_MAGIC (cv); 669 MAGIC *mg = CORO_MAGIC_cv (cv);
374 AV *av;
375 670
376 if (!mg) 671 if (ecb_expect_false (!mg))
377 {
378 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
379 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
380 mg->mg_virtual = &vtbl_coro;
381 mg->mg_obj = (SV *)newAV ();
382 } 672 {
673 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
674 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
675 mg->mg_len = 1; /* so mg_free frees mg_ptr */
676 }
677 else
678 Renew (mg->mg_ptr,
679 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
680 char);
383 681
384 av = (AV *)mg->mg_obj; 682 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
385
386 if (AvFILLp (av) >= AvMAX (av))
387 av_extend (av, AvMAX (av) + 1);
388
389 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
390} 683}
391 684
392/** load & save, init *******************************************************/ 685/** load & save, init *******************************************************/
393 686
687ecb_inline void
688swap_sv (SV *a, SV *b)
689{
690 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
691 SV tmp;
692
693 /* swap sv_any */
694 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
695
696 /* swap sv_flags */
697 SvFLAGS (&tmp) = SvFLAGS (a);
698 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
699 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
700
701#if PERL_VERSION_ATLEAST (5,10,0)
702 /* perl 5.10 and later complicates this _quite_ a bit, but it also
703 * is much faster, so no quarrels here. alternatively, we could
704 * sv_upgrade to avoid this.
705 */
706 {
707 /* swap sv_u */
708 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
709
710 /* if SvANY points to the head, we need to adjust the pointers,
711 * as the pointer for a still points to b, and maybe vice versa.
712 */
713 U32 svany_in_head_set = (1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV);
714 #if NVSIZE <= IVSIZE && PERL_VERSION_ATLEAST(5,22,0)
715 svany_in_head_set |= 1 << SVt_NV;
716 #endif
717
718 #define svany_in_head(type) (svany_in_head_set & (1 << (type)))
719
720 if (svany_in_head (SvTYPE (a)))
721 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
722
723 if (svany_in_head (SvTYPE (b)))
724 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
725 }
726#endif
727}
728
729/* swap sv heads, at least logically */
730static void
731swap_svs_enter (pTHX_ Coro__State c)
732{
733 int i;
734
735 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
736 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
737}
738
739static void
740swap_svs_leave (pTHX_ Coro__State c)
741{
742 int i;
743
744 for (i = AvFILLp (c->swap_sv) - 1; i >= 0; i -= 2)
745 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
746}
747
748#define SWAP_SVS_ENTER(coro) \
749 if (ecb_expect_false ((coro)->swap_sv)) \
750 swap_svs_enter (aTHX_ (coro))
751
752#define SWAP_SVS_LEAVE(coro) \
753 if (ecb_expect_false ((coro)->swap_sv)) \
754 swap_svs_leave (aTHX_ (coro))
755
756static void
757on_enterleave_call (pTHX_ SV *cb);
758
394static void 759static void
395load_perl (pTHX_ Coro__State c) 760load_perl (pTHX_ Coro__State c)
396{ 761{
397#define VAR(name,type) PL_ ## name = c->name; 762 perl_slots *slot = c->slot;
763 c->slot = 0;
764
765 PL_mainstack = c->mainstack;
766
767#if CORO_JIT
768 load_perl_slots (slot);
769#else
770 #define VARx(name,expr,type) expr = slot->name;
398# include "state.h" 771 #include "state.h"
399#undef VAR 772#endif
400
401 GvSV (PL_defgv) = c->defsv;
402 GvAV (PL_defgv) = c->defav;
403 GvSV (PL_errgv) = c->errsv;
404 GvSV (irsgv) = c->irssv_sv;
405 773
406 { 774 {
407 dSP; 775 dSP;
776
408 CV *cv; 777 CV *cv;
409 778
410 /* now do the ugly restore mess */ 779 /* now do the ugly restore mess */
411 while ((cv = (CV *)POPs)) 780 while (ecb_expect_true (cv = (CV *)POPs))
412 { 781 {
413 put_padlist (aTHX_ cv); /* mark this padlist as available */ 782 put_padlist (aTHX_ cv); /* mark this padlist as available */
414 CvDEPTH (cv) = PTR2IV (POPs); 783 CvDEPTH (cv) = PTR2IV (POPs);
415 CvPADLIST (cv) = (AV *)POPs; 784 CvPADLIST (cv) = (PADLIST *)POPs;
416 } 785 }
417 786
418 PUTBACK; 787 PUTBACK;
419 } 788 }
789
790 slf_frame = c->slf_frame;
791 CORO_THROW = c->except;
792
793 if (ecb_expect_false (enable_times))
794 {
795 if (ecb_expect_false (!times_valid))
796 coro_times_update ();
797
798 coro_times_sub (c);
799 }
800
801 if (ecb_expect_false (c->on_enter))
802 {
803 int i;
804
805 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
806 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
807 }
808
809 if (ecb_expect_false (c->on_enter_xs))
810 {
811 int i;
812
813 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
814 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
815 }
816
817 SWAP_SVS_ENTER (c);
420} 818}
421 819
422static void 820static void
423save_perl (pTHX_ Coro__State c) 821save_perl (pTHX_ Coro__State c)
424{ 822{
823 SWAP_SVS_LEAVE (c);
824
825 if (ecb_expect_false (c->on_leave_xs))
826 {
827 int i;
828
829 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
830 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
831 }
832
833 if (ecb_expect_false (c->on_leave))
834 {
835 int i;
836
837 for (i = AvFILLp (c->on_leave); i >= 0; --i)
838 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
839 }
840
841 times_valid = 0;
842
843 if (ecb_expect_false (enable_times))
844 {
845 coro_times_update (); times_valid = 1;
846 coro_times_add (c);
847 }
848
849 c->except = CORO_THROW;
850 c->slf_frame = slf_frame;
851
425 { 852 {
426 dSP; 853 dSP;
427 I32 cxix = cxstack_ix; 854 I32 cxix = cxstack_ix;
428 PERL_CONTEXT *ccstk = cxstack; 855 PERL_CONTEXT *ccstk = cxstack;
429 PERL_SI *top_si = PL_curstackinfo; 856 PERL_SI *top_si = PL_curstackinfo;
… …
435 862
436 XPUSHs (Nullsv); 863 XPUSHs (Nullsv);
437 /* this loop was inspired by pp_caller */ 864 /* this loop was inspired by pp_caller */
438 for (;;) 865 for (;;)
439 { 866 {
440 while (cxix >= 0) 867 while (ecb_expect_true (cxix >= 0))
441 { 868 {
442 PERL_CONTEXT *cx = &ccstk[cxix--]; 869 PERL_CONTEXT *cx = &ccstk[cxix--];
443 870
444 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 871 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
445 { 872 {
446 CV *cv = cx->blk_sub.cv; 873 CV *cv = cx->blk_sub.cv;
447 874
448 if (CvDEPTH (cv)) 875 if (ecb_expect_true (CvDEPTH (cv)))
449 { 876 {
450 EXTEND (SP, 3); 877 EXTEND (SP, 3);
451 PUSHs ((SV *)CvPADLIST (cv)); 878 PUSHs ((SV *)CvPADLIST (cv));
452 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 879 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
453 PUSHs ((SV *)cv); 880 PUSHs ((SV *)cv);
454 881
455 CvDEPTH (cv) = 0; 882 CvDEPTH (cv) = 0;
456 get_padlist (aTHX_ cv); 883 get_padlist (aTHX_ cv);
457 } 884 }
458 } 885 }
459 } 886 }
460 887
461 if (top_si->si_type == PERLSI_MAIN) 888 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
462 break; 889 break;
463 890
464 top_si = top_si->si_prev; 891 top_si = top_si->si_prev;
465 ccstk = top_si->si_cxstack; 892 ccstk = top_si->si_cxstack;
466 cxix = top_si->si_cxix; 893 cxix = top_si->si_cxix;
467 } 894 }
468 895
469 PUTBACK; 896 PUTBACK;
470 } 897 }
471 898
472 c->defav = GvAV (PL_defgv); 899 /* allocate some space on the context stack for our purposes */
473 c->defsv = DEFSV; 900 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
474 c->errsv = ERRSV; 901 {
475 c->irssv_sv = GvSV (irsgv); 902 unsigned int i;
476 903
477#define VAR(name,type)c->name = PL_ ## name; 904 for (i = 0; i < SLOT_COUNT; ++i)
905 CXINC;
906
907 cxstack_ix -= SLOT_COUNT; /* undo allocation */
908 }
909
910 c->mainstack = PL_mainstack;
911
912 {
913 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
914
915#if CORO_JIT
916 save_perl_slots (slot);
917#else
918 #define VARx(name,expr,type) slot->name = expr;
478# include "state.h" 919 #include "state.h"
479#undef VAR 920#endif
921 }
480} 922}
481 923
482/* 924/*
483 * allocate various perl stacks. This is an exact copy 925 * allocate various perl stacks. This is almost an exact copy
484 * of perl.c:init_stacks, except that it uses less memory 926 * of perl.c:init_stacks, except that it uses less memory
485 * on the (sometimes correct) assumption that coroutines do 927 * on the (sometimes correct) assumption that coroutines do
486 * not usually need a lot of stackspace. 928 * not usually need a lot of stackspace.
487 */ 929 */
488#if CORO_PREFER_PERL_FUNCTIONS 930#if CORO_PREFER_PERL_FUNCTIONS
489# define coro_init_stacks init_stacks 931# define coro_init_stacks(thx) init_stacks ()
490#else 932#else
491static void 933static void
492coro_init_stacks (pTHX) 934coro_init_stacks (pTHX)
493{ 935{
494 PL_curstackinfo = new_stackinfo(64, 6); 936 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
495 PL_curstackinfo->si_type = PERLSI_MAIN; 937 PL_curstackinfo->si_type = PERLSI_MAIN;
496 PL_curstack = PL_curstackinfo->si_stack; 938 PL_curstack = PL_curstackinfo->si_stack;
497 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 939 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
498 940
499 PL_stack_base = AvARRAY(PL_curstack); 941 PL_stack_base = AvARRAY(PL_curstack);
500 PL_stack_sp = PL_stack_base; 942 PL_stack_sp = PL_stack_base;
501 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 943 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
502 944
503 New(50,PL_tmps_stack,64,SV*); 945 New(50,PL_tmps_stack,32,SV*);
504 PL_tmps_floor = -1; 946 PL_tmps_floor = -1;
505 PL_tmps_ix = -1; 947 PL_tmps_ix = -1;
506 PL_tmps_max = 64; 948 PL_tmps_max = 32;
507 949
508 New(54,PL_markstack,16,I32); 950 New(54,PL_markstack,16,I32);
509 PL_markstack_ptr = PL_markstack; 951 PL_markstack_ptr = PL_markstack;
510 PL_markstack_max = PL_markstack + 16; 952 PL_markstack_max = PL_markstack + 16;
511 953
512#ifdef SET_MARK_OFFSET 954#ifdef SET_MARK_OFFSET
513 SET_MARK_OFFSET; 955 SET_MARK_OFFSET;
514#endif 956#endif
515 957
516 New(54,PL_scopestack,16,I32); 958 New(54,PL_scopestack,8,I32);
517 PL_scopestack_ix = 0; 959 PL_scopestack_ix = 0;
518 PL_scopestack_max = 16; 960 PL_scopestack_max = 8;
961#if HAS_SCOPESTACK_NAME
962 New(54,PL_scopestack_name,8,const char*);
963#endif
519 964
520 New(54,PL_savestack,64,ANY); 965 New(54,PL_savestack,24,ANY);
521 PL_savestack_ix = 0; 966 PL_savestack_ix = 0;
522 PL_savestack_max = 64; 967 PL_savestack_max = 24;
523
524#if !PERL_VERSION_ATLEAST (5,9,0) 968#if !PERL_VERSION_ATLEAST (5,24,0)
969 /* perl 5.24 moves SS_MAXPUSH optimisation from */
970 /* the header macros to PL_savestack_max */
971 PL_savestack_max -= SS_MAXPUSH;
972#endif
973
974#if !PERL_VERSION_ATLEAST (5,10,0)
525 New(54,PL_retstack,4,OP*); 975 New(54,PL_retstack,4,OP*);
526 PL_retstack_ix = 0; 976 PL_retstack_ix = 0;
527 PL_retstack_max = 4; 977 PL_retstack_max = 4;
528#endif 978#endif
529} 979}
… …
531 981
532/* 982/*
533 * destroy the stacks, the callchain etc... 983 * destroy the stacks, the callchain etc...
534 */ 984 */
535static void 985static void
536coro_destroy_stacks (pTHX) 986coro_destruct_stacks (pTHX)
537{ 987{
538 while (PL_curstackinfo->si_next) 988 while (PL_curstackinfo->si_next)
539 PL_curstackinfo = PL_curstackinfo->si_next; 989 PL_curstackinfo = PL_curstackinfo->si_next;
540 990
541 while (PL_curstackinfo) 991 while (PL_curstackinfo)
… …
551 } 1001 }
552 1002
553 Safefree (PL_tmps_stack); 1003 Safefree (PL_tmps_stack);
554 Safefree (PL_markstack); 1004 Safefree (PL_markstack);
555 Safefree (PL_scopestack); 1005 Safefree (PL_scopestack);
1006#if HAS_SCOPESTACK_NAME
1007 Safefree (PL_scopestack_name);
1008#endif
556 Safefree (PL_savestack); 1009 Safefree (PL_savestack);
557#if !PERL_VERSION_ATLEAST (5,9,0) 1010#if !PERL_VERSION_ATLEAST (5,10,0)
558 Safefree (PL_retstack); 1011 Safefree (PL_retstack);
559#endif 1012#endif
560} 1013}
1014
1015#define CORO_RSS \
1016 rss += sizeof (SYM (curstackinfo)); \
1017 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
1018 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1019 rss += SYM (tmps_max) * sizeof (SV *); \
1020 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1021 rss += SYM (scopestack_max) * sizeof (I32); \
1022 rss += SYM (savestack_max) * sizeof (ANY);
561 1023
562static size_t 1024static size_t
563coro_rss (pTHX_ struct coro *coro) 1025coro_rss (pTHX_ struct coro *coro)
564{ 1026{
565 size_t rss = sizeof (*coro); 1027 size_t rss = sizeof (*coro);
566 1028
567 if (coro->mainstack) 1029 if (coro->mainstack)
568 { 1030 {
569 if (coro->flags & CF_RUNNING) 1031 if (coro->flags & CF_RUNNING)
570 { 1032 {
571 #define VAR(name,type)coro->name = PL_ ## name; 1033 #define SYM(sym) PL_ ## sym
572 # include "state.h" 1034 CORO_RSS;
573 #undef VAR 1035 #undef SYM
574 } 1036 }
575 1037 else
576 rss += sizeof (coro->curstackinfo); 1038 {
577 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 1039 #define SYM(sym) coro->slot->sym
578 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 1040 CORO_RSS;
579 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 1041 #undef SYM
580 rss += coro->tmps_max * sizeof (SV *); 1042 }
581 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
582 rss += coro->scopestack_max * sizeof (I32);
583 rss += coro->savestack_max * sizeof (ANY);
584
585#if !PERL_VERSION_ATLEAST (5,9,0)
586 rss += coro->retstack_max * sizeof (OP *);
587#endif
588 } 1043 }
589 1044
590 return rss; 1045 return rss;
591} 1046}
592 1047
593/** coroutine stack handling ************************************************/ 1048/** coroutine stack handling ************************************************/
594 1049
1050static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
1051static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1052static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1053
1054/* apparently < 5.8.8 */
1055#ifndef MgPV_nolen_const
1056#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1057 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1058 (const char*)(mg)->mg_ptr)
1059#endif
1060
1061/*
1062 * This overrides the default magic get method of %SIG elements.
1063 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1064 * and instead of trying to save and restore the hash elements (extremely slow),
1065 * we just provide our own readback here.
1066 */
1067static int ecb_cold
1068coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1069{
1070 const char *s = MgPV_nolen_const (mg);
1071
1072 if (*s == '_')
1073 {
1074 SV **svp = 0;
1075
1076 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1077 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1078
1079 if (svp)
1080 {
1081 SV *ssv;
1082
1083 if (!*svp)
1084 ssv = &PL_sv_undef;
1085 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1086 ssv = sv_2mortal (newRV_inc (*svp));
1087 else
1088 ssv = *svp;
1089
1090 sv_setsv (sv, ssv);
1091 return 0;
1092 }
1093 }
1094
1095 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1096}
1097
1098static int ecb_cold
1099coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1100{
1101 const char *s = MgPV_nolen_const (mg);
1102
1103 if (*s == '_')
1104 {
1105 SV **svp = 0;
1106
1107 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1108 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1109
1110 if (svp)
1111 {
1112 SV *old = *svp;
1113 *svp = 0;
1114 SvREFCNT_dec (old);
1115 return 0;
1116 }
1117 }
1118
1119 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1120}
1121
1122static int ecb_cold
1123coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1124{
1125 const char *s = MgPV_nolen_const (mg);
1126
1127 if (*s == '_')
1128 {
1129 SV **svp = 0;
1130
1131 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1132 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1133
1134 if (svp)
1135 {
1136 SV *old = *svp;
1137 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1138 SvREFCNT_dec (old);
1139 return 0;
1140 }
1141 }
1142
1143 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1144}
1145
1146static void
1147prepare_nop (pTHX_ struct coro_transfer_args *ta)
1148{
1149 /* kind of mega-hacky, but works */
1150 ta->next = ta->prev = (struct coro *)ta;
1151}
1152
595static void 1153static int
1154slf_check_nop (pTHX_ struct CoroSLF *frame)
1155{
1156 return 0;
1157}
1158
1159static int
1160slf_check_repeat (pTHX_ struct CoroSLF *frame)
1161{
1162 return 1;
1163}
1164
1165static UNOP init_perl_op;
1166
1167ecb_noinline static void /* noinline to keep it out of the transfer fast path */
596coro_setup (pTHX_ struct coro *coro) 1168init_perl (pTHX_ struct coro *coro)
597{ 1169{
598 /* 1170 /*
599 * emulate part of the perl startup here. 1171 * emulate part of the perl startup here.
600 */ 1172 */
601 coro_init_stacks (aTHX); 1173 coro_init_stacks (aTHX);
602 1174
603 PL_runops = RUNOPS_DEFAULT; 1175 PL_runops = RUNOPS_DEFAULT;
604 PL_curcop = &PL_compiling; 1176 PL_curcop = &PL_compiling;
605 PL_in_eval = EVAL_NULL; 1177 PL_in_eval = EVAL_NULL;
606 PL_comppad = 0; 1178 PL_comppad = 0;
1179 PL_comppad_name = 0;
1180 PL_comppad_name_fill = 0;
1181 PL_comppad_name_floor = 0;
607 PL_curpm = 0; 1182 PL_curpm = 0;
1183 PL_curpad = 0;
608 PL_localizing = 0; 1184 PL_localizing = 0;
609 PL_dirty = 0;
610 PL_restartop = 0; 1185 PL_restartop = 0;
611 1186#if PERL_VERSION_ATLEAST (5,10,0)
1187 PL_parser = 0;
1188#endif
1189 PL_hints = 0;
1190
1191 /* recreate the die/warn hooks */
1192 PL_diehook = SvREFCNT_inc (rv_diehook);
1193 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1194
612 GvSV (PL_defgv) = newSV (0); 1195 GvSV (PL_defgv) = newSV (0);
613 GvAV (PL_defgv) = coro->args; coro->args = 0; 1196 GvAV (PL_defgv) = coro->args; coro->args = 0;
614 GvSV (PL_errgv) = newSV (0); 1197 GvSV (PL_errgv) = newSV (0);
615 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1198 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1199 GvHV (PL_hintgv) = newHV ();
1200#if PERL_VERSION_ATLEAST (5,10,0)
1201 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1202#endif
616 PL_rs = newSVsv (GvSV (irsgv)); 1203 PL_rs = newSVsv (GvSV (irsgv));
617 PL_defoutgv = SvREFCNT_inc (stdoutgv); 1204 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
618
619 ENTER; /* necessary e.g. for dounwind */
620 1205
621 { 1206 {
622 dSP; 1207 dSP;
623 LOGOP myop; 1208 UNOP myop;
624 1209
625 Zero (&myop, 1, LOGOP); 1210 Zero (&myop, 1, UNOP);
626 myop.op_next = Nullop; 1211 myop.op_next = Nullop;
1212 myop.op_type = OP_ENTERSUB;
627 myop.op_flags = OPf_WANT_VOID; 1213 myop.op_flags = OPf_WANT_VOID;
628 1214
629 PUSHMARK (SP); 1215 PUSHMARK (SP);
630 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1216 PUSHs ((SV *)coro->startcv);
631 PUTBACK; 1217 PUTBACK;
632 PL_op = (OP *)&myop; 1218 PL_op = (OP *)&myop;
633 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1219 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
634 SPAGAIN;
635 } 1220 }
636}
637 1221
1222 /* this newly created coroutine might be run on an existing cctx which most
1223 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1224 */
1225 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1226 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1227 slf_frame.destroy = 0;
1228
1229 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1230 init_perl_op.op_next = PL_op;
1231 init_perl_op.op_type = OP_ENTERSUB;
1232 init_perl_op.op_ppaddr = pp_slf;
1233 /* no flags etc. required, as an init function won't be called */
1234
1235 PL_op = (OP *)&init_perl_op;
1236
1237 /* copy throw, in case it was set before init_perl */
1238 CORO_THROW = coro->except;
1239
1240 SWAP_SVS_ENTER (coro);
1241
1242 if (ecb_expect_false (enable_times))
1243 {
1244 coro_times_update ();
1245 coro_times_sub (coro);
1246 }
1247}
1248
638static void 1249static void
639coro_destroy (pTHX_ struct coro *coro) 1250coro_unwind_stacks (pTHX)
640{ 1251{
641 if (!IN_DESTRUCT) 1252 if (!IN_DESTRUCT)
642 { 1253 {
643 /* restore all saved variables and stuff */ 1254 /* restore all saved variables and stuff */
644 LEAVE_SCOPE (0); 1255 LEAVE_SCOPE (0);
… …
652 POPSTACK_TO (PL_mainstack); 1263 POPSTACK_TO (PL_mainstack);
653 1264
654 /* unwind main stack */ 1265 /* unwind main stack */
655 dounwind (-1); 1266 dounwind (-1);
656 } 1267 }
1268}
657 1269
658 SvREFCNT_dec (GvSV (PL_defgv)); 1270static void
659 SvREFCNT_dec (GvAV (PL_defgv)); 1271destroy_perl (pTHX_ struct coro *coro)
660 SvREFCNT_dec (GvSV (PL_errgv)); 1272{
661 SvREFCNT_dec (PL_defoutgv); 1273 SV *svf [9];
662 SvREFCNT_dec (PL_rs);
663 SvREFCNT_dec (GvSV (irsgv));
664 1274
1275 {
1276 SV *old_current = SvRV (coro_current);
1277 struct coro *current = SvSTATE (old_current);
1278
1279 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1280
1281 save_perl (aTHX_ current);
1282
1283 /* this will cause transfer_check to croak on block*/
1284 SvRV_set (coro_current, (SV *)coro->hv);
1285
1286 load_perl (aTHX_ coro);
1287
1288 /* restore swapped sv's */
1289 SWAP_SVS_LEAVE (coro);
1290
1291 coro_unwind_stacks (aTHX);
1292
1293 coro_destruct_stacks (aTHX);
1294
1295 /* now save some sv's to be free'd later */
1296 svf [0] = GvSV (PL_defgv);
1297 svf [1] = (SV *)GvAV (PL_defgv);
1298 svf [2] = GvSV (PL_errgv);
1299 svf [3] = (SV *)PL_defoutgv;
1300 svf [4] = PL_rs;
1301 svf [5] = GvSV (irsgv);
1302 svf [6] = (SV *)GvHV (PL_hintgv);
1303 svf [7] = PL_diehook;
1304 svf [8] = PL_warnhook;
1305 assert (9 == sizeof (svf) / sizeof (*svf));
1306
1307 SvRV_set (coro_current, old_current);
1308
1309 load_perl (aTHX_ current);
1310 }
1311
1312 {
1313 unsigned int i;
1314
1315 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1316 SvREFCNT_dec (svf [i]);
1317
665 SvREFCNT_dec (coro->saved_deffh); 1318 SvREFCNT_dec (coro->saved_deffh);
666 //SvREFCNT_dec (coro->throw); 1319 SvREFCNT_dec (coro->rouse_cb);
667 1320 SvREFCNT_dec (coro->invoke_cb);
668 coro_destroy_stacks (aTHX); 1321 SvREFCNT_dec (coro->invoke_av);
1322 SvREFCNT_dec (coro->on_enter_xs);
1323 SvREFCNT_dec (coro->on_leave_xs);
1324 }
669} 1325}
670 1326
671static void 1327ecb_inline void
672free_coro_mortal (pTHX) 1328free_coro_mortal (pTHX)
673{ 1329{
674 if (coro_mortal) 1330 if (ecb_expect_true (coro_mortal))
675 { 1331 {
676 SvREFCNT_dec (coro_mortal); 1332 SvREFCNT_dec ((SV *)coro_mortal);
677 coro_mortal = 0; 1333 coro_mortal = 0;
678 } 1334 }
679} 1335}
680 1336
681static int 1337static int
682runops_trace (pTHX) 1338runops_trace (pTHX)
683{ 1339{
684 COP *oldcop = 0; 1340 COP *oldcop = 0;
685 int oldcxix = -2; 1341 int oldcxix = -2;
686 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
687 coro_cctx *cctx = coro->cctx;
688 1342
689 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1343 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
690 { 1344 {
691 PERL_ASYNC_CHECK (); 1345 PERL_ASYNC_CHECK ();
692 1346
693 if (cctx->flags & CC_TRACE_ALL) 1347 if (cctx_current->flags & CC_TRACE_ALL)
694 { 1348 {
695 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1349 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
696 { 1350 {
697 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1351 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
698 SV **bot, **top; 1352 SV **bot, **top;
699 AV *av = newAV (); /* return values */ 1353 AV *av = newAV (); /* return values */
700 SV **cb; 1354 SV **cb;
… …
708 bot = PL_stack_base + cx->blk_oldsp + 1; 1362 bot = PL_stack_base + cx->blk_oldsp + 1;
709 top = cx->blk_gimme == G_ARRAY ? SP + 1 1363 top = cx->blk_gimme == G_ARRAY ? SP + 1
710 : cx->blk_gimme == G_SCALAR ? bot + 1 1364 : cx->blk_gimme == G_SCALAR ? bot + 1
711 : bot; 1365 : bot;
712 1366
1367 av_extend (av, top - bot);
713 while (bot < top) 1368 while (bot < top)
714 av_push (av, SvREFCNT_inc (*bot++)); 1369 av_push (av, SvREFCNT_inc_NN (*bot++));
715 1370
716 PL_runops = RUNOPS_DEFAULT; 1371 PL_runops = RUNOPS_DEFAULT;
717 ENTER; 1372 ENTER;
718 SAVETMPS; 1373 SAVETMPS;
719 EXTEND (SP, 3); 1374 EXTEND (SP, 3);
… …
736 1391
737 if (PL_curcop != &PL_compiling) 1392 if (PL_curcop != &PL_compiling)
738 { 1393 {
739 SV **cb; 1394 SV **cb;
740 1395
741 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1396 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
742 { 1397 {
743 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1398 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
744 1399
745 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1400 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
746 { 1401 {
747 runops_proc_t old_runops = PL_runops;
748 dSP; 1402 dSP;
749 GV *gv = CvGV (cx->blk_sub.cv); 1403 GV *gv = CvGV (cx->blk_sub.cv);
750 SV *fullname = sv_2mortal (newSV (0)); 1404 SV *fullname = sv_2mortal (newSV (0));
751 1405
752 if (isGV (gv)) 1406 if (isGV (gv))
… …
757 SAVETMPS; 1411 SAVETMPS;
758 EXTEND (SP, 3); 1412 EXTEND (SP, 3);
759 PUSHMARK (SP); 1413 PUSHMARK (SP);
760 PUSHs (&PL_sv_yes); 1414 PUSHs (&PL_sv_yes);
761 PUSHs (fullname); 1415 PUSHs (fullname);
762 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1416 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
763 PUTBACK; 1417 PUTBACK;
764 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1418 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
765 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1419 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
766 SPAGAIN; 1420 SPAGAIN;
767 FREETMPS; 1421 FREETMPS;
… …
770 } 1424 }
771 1425
772 oldcxix = cxstack_ix; 1426 oldcxix = cxstack_ix;
773 } 1427 }
774 1428
775 if (cctx->flags & CC_TRACE_LINE) 1429 if (cctx_current->flags & CC_TRACE_LINE)
776 { 1430 {
777 dSP; 1431 dSP;
778 1432
779 PL_runops = RUNOPS_DEFAULT; 1433 PL_runops = RUNOPS_DEFAULT;
780 ENTER; 1434 ENTER;
… …
799 1453
800 TAINT_NOT; 1454 TAINT_NOT;
801 return 0; 1455 return 0;
802} 1456}
803 1457
804/* inject a fake call to Coro::State::_cctx_init into the execution */ 1458static struct CoroSLF cctx_ssl_frame;
805/* _cctx_init should be careful, as it could be called at almost any time */
806/* during execution of a perl program */
807static void NOINLINE
808prepare_cctx (pTHX_ coro_cctx *cctx)
809{
810 dSP;
811 LOGOP myop;
812 1459
1460static void
1461slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1462{
1463 ta->prev = 0;
1464}
1465
1466static int
1467slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1468{
1469 *frame = cctx_ssl_frame;
1470
1471 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1472}
1473
1474/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1475static void ecb_noinline
1476cctx_prepare (pTHX)
1477{
813 PL_top_env = &PL_start_env; 1478 PL_top_env = &PL_start_env;
814 1479
815 if (cctx->flags & CC_TRACE) 1480 if (cctx_current->flags & CC_TRACE)
816 PL_runops = runops_trace; 1481 PL_runops = runops_trace;
817 1482
818 Zero (&myop, 1, LOGOP); 1483 /* we already must be executing an SLF op, there is no other valid way
819 myop.op_next = PL_op; 1484 * that can lead to creation of a new cctx */
820 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1485 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1486 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
821 1487
822 PUSHMARK (SP); 1488 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
823 EXTEND (SP, 2); 1489 cctx_ssl_frame = slf_frame;
824 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1490
825 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1491 slf_frame.prepare = slf_prepare_set_stacklevel;
826 PUTBACK; 1492 slf_frame.check = slf_check_set_stacklevel;
827 PL_op = (OP *)&myop; 1493}
828 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1494
829 SPAGAIN; 1495/* the tail of transfer: execute stuff we can only do after a transfer */
1496ecb_inline void
1497transfer_tail (pTHX)
1498{
1499 free_coro_mortal (aTHX);
1500}
1501
1502/* try to exit the same way perl's main function would do */
1503/* we do not bother resetting the environment or other things *7
1504/* that are not, uhm, essential */
1505/* this obviously also doesn't work when perl is embedded */
1506static void ecb_noinline ecb_cold
1507perlish_exit (pTHX)
1508{
1509 int exitstatus = perl_destruct (PL_curinterp);
1510 perl_free (PL_curinterp);
1511 exit (exitstatus);
830} 1512}
831 1513
832/* 1514/*
833 * this is a _very_ stripped down perl interpreter ;) 1515 * this is a _very_ stripped down perl interpreter ;)
834 */ 1516 */
835static void 1517static void
836coro_run (void *arg) 1518cctx_run (void *arg)
837{ 1519{
1520#ifdef USE_ITHREADS
1521# if CORO_PTHREAD
1522 PERL_SET_CONTEXT (coro_thx);
1523# endif
1524#endif
1525 {
838 dTHX; 1526 dTHX;
839 1527
840 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1528 /* normally we would need to skip the entersub here */
841 UNLOCK; 1529 /* not doing so will re-execute it, which is exactly what we want */
842
843 /* we now skip the entersub that lead to transfer() */
844 PL_op = PL_op->op_next; 1530 /* PL_nop = PL_nop->op_next */
845 1531
846 /* inject a fake subroutine call to cctx_init */ 1532 /* inject a fake subroutine call to cctx_init */
847 prepare_cctx (aTHX_ (coro_cctx *)arg); 1533 cctx_prepare (aTHX);
848 1534
1535 /* cctx_run is the alternative tail of transfer() */
1536 transfer_tail (aTHX);
1537
849 /* somebody or something will hit me for both perl_run and PL_restartop */ 1538 /* somebody or something will hit me for both perl_run and PL_restartop */
850 PL_restartop = PL_op; 1539 PL_restartop = PL_op;
851 perl_run (PL_curinterp); 1540 perl_run (PL_curinterp);
852
853 /* 1541 /*
1542 * Unfortunately, there is no way to get at the return values of the
1543 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1544 * runtime errors here, as this is just a random interpreter, not a thread.
1545 */
1546
1547 /*
854 * If perl-run returns we assume exit() was being called or the coro 1548 * If perl-run returns we assume exit() was being called or the coro
855 * fell off the end, which seems to be the only valid (non-bug) 1549 * fell off the end, which seems to be the only valid (non-bug)
856 * reason for perl_run to return. We try to exit by jumping to the 1550 * reason for perl_run to return. We try to mimic whatever perl is normally
857 * bootstrap-time "top" top_env, as we cannot restore the "main" 1551 * doing in that case. YMMV.
858 * coroutine as Coro has no such concept
859 */ 1552 */
860 PL_top_env = main_top_env; 1553 perlish_exit (aTHX);
861 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1554 }
862} 1555}
863 1556
864static coro_cctx * 1557static coro_cctx *
865cctx_new () 1558cctx_new (void)
866{ 1559{
867 coro_cctx *cctx; 1560 coro_cctx *cctx;
868 void *stack_start;
869 size_t stack_size;
870 1561
871 ++cctx_count; 1562 ++cctx_count;
872
873 Newz (0, cctx, 1, coro_cctx); 1563 New (0, cctx, 1, coro_cctx);
874 1564
875#if HAVE_MMAP 1565 cctx->gen = cctx_gen;
1566 cctx->flags = 0;
1567 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
876 1568
877 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1569 return cctx;
878 /* mmap supposedly does allocate-on-write for us */ 1570}
879 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
880 1571
881 if (cctx->sptr != (void *)-1) 1572/* create a new cctx only suitable as source */
882 { 1573static coro_cctx *
883# if CORO_STACKGUARD 1574cctx_new_empty (void)
884 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1575{
885# endif 1576 coro_cctx *cctx = cctx_new ();
886 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1577
887 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1578 cctx->stack.sptr = 0;
888 cctx->flags |= CC_MAPPED; 1579 coro_create (&cctx->cctx, 0, 0, 0, 0);
1580
1581 return cctx;
1582}
1583
1584/* create a new cctx suitable as destination/running a perl interpreter */
1585static coro_cctx *
1586cctx_new_run (void)
1587{
1588 coro_cctx *cctx = cctx_new ();
1589
1590 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
889 } 1591 {
890 else
891#endif
892 {
893 cctx->ssize = coro_stacksize * (long)sizeof (long);
894 New (0, cctx->sptr, coro_stacksize, long);
895
896 if (!cctx->sptr)
897 {
898 perror ("FATAL: unable to allocate stack for coroutine"); 1592 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
899 _exit (EXIT_FAILURE); 1593 _exit (EXIT_FAILURE);
900 }
901
902 stack_start = cctx->sptr;
903 stack_size = cctx->ssize;
904 } 1594 }
905 1595
906 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
907 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1596 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
908 1597
909 return cctx; 1598 return cctx;
910} 1599}
911 1600
912static void 1601static void
913cctx_destroy (coro_cctx *cctx) 1602cctx_destroy (coro_cctx *cctx)
914{ 1603{
915 if (!cctx) 1604 if (!cctx)
916 return; 1605 return;
917 1606
1607 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1608
918 --cctx_count; 1609 --cctx_count;
1610 coro_destroy (&cctx->cctx);
919 1611
920#if CORO_USE_VALGRIND 1612 coro_stack_free (&cctx->stack);
921 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
922#endif
923
924#if HAVE_MMAP
925 if (cctx->flags & CC_MAPPED)
926 munmap (cctx->sptr, cctx->ssize);
927 else
928#endif
929 Safefree (cctx->sptr);
930 1613
931 Safefree (cctx); 1614 Safefree (cctx);
932} 1615}
1616
1617/* wether this cctx should be destructed */
1618#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
933 1619
934static coro_cctx * 1620static coro_cctx *
935cctx_get (pTHX) 1621cctx_get (pTHX)
936{ 1622{
937 while (cctx_first) 1623 while (ecb_expect_true (cctx_first))
938 { 1624 {
939 coro_cctx *cctx = cctx_first; 1625 coro_cctx *cctx = cctx_first;
940 cctx_first = cctx->next; 1626 cctx_first = cctx->next;
941 --cctx_idle; 1627 --cctx_idle;
942 1628
943 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1629 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
944 return cctx; 1630 return cctx;
945 1631
946 cctx_destroy (cctx); 1632 cctx_destroy (cctx);
947 } 1633 }
948 1634
949 return cctx_new (); 1635 return cctx_new_run ();
950} 1636}
951 1637
952static void 1638static void
953cctx_put (coro_cctx *cctx) 1639cctx_put (coro_cctx *cctx)
954{ 1640{
1641 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1642
955 /* free another cctx if overlimit */ 1643 /* free another cctx if overlimit */
956 if (cctx_idle >= MAX_IDLE_CCTX) 1644 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
957 { 1645 {
958 coro_cctx *first = cctx_first; 1646 coro_cctx *first = cctx_first;
959 cctx_first = first->next; 1647 cctx_first = first->next;
960 --cctx_idle; 1648 --cctx_idle;
961 1649
… …
967 cctx_first = cctx; 1655 cctx_first = cctx;
968} 1656}
969 1657
970/** coroutine switching *****************************************************/ 1658/** coroutine switching *****************************************************/
971 1659
972static void NOINLINE 1660static void
973transfer_check (pTHX_ struct coro *prev, struct coro *next) 1661transfer_check (pTHX_ struct coro *prev, struct coro *next)
974{ 1662{
975 if (prev != next) 1663 /* TODO: throwing up here is considered harmful */
1664
1665 if (ecb_expect_true (prev != next))
976 { 1666 {
977 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1667 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
978 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1668 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
979 1669
980 if (next->flags & CF_RUNNING) 1670 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
981 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
982
983 if (next->flags & CF_DESTROYED)
984 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1671 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
985 1672
1673#if !PERL_VERSION_ATLEAST (5,10,0)
986 if (PL_lex_state != LEX_NOTPARSING) 1674 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
987 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1675 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1676#endif
988 } 1677 }
989} 1678}
990 1679
991/* always use the TRANSFER macro */ 1680/* always use the TRANSFER macro */
992static void NOINLINE 1681static void ecb_noinline /* noinline so we have a fixed stackframe */
993transfer (pTHX_ struct coro *prev, struct coro *next) 1682transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
994{ 1683{
995 dSTACKLEVEL; 1684 dSTACKLEVEL;
996 1685
997 /* sometimes transfer is only called to set idle_sp */ 1686 /* sometimes transfer is only called to set idle_sp */
998 if (!next) 1687 if (ecb_expect_false (!prev))
999 { 1688 {
1000 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1689 cctx_current->idle_sp = STACKLEVEL;
1001 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1690 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1002 }
1003 else if (prev != next)
1004 { 1691 }
1692 else if (ecb_expect_true (prev != next))
1693 {
1005 coro_cctx *prev__cctx; 1694 coro_cctx *cctx_prev;
1006 1695
1007 if (prev->flags & CF_NEW) 1696 if (ecb_expect_false (prev->flags & CF_NEW))
1008 { 1697 {
1009 /* create a new empty context */ 1698 /* create a new empty/source context */
1010 Newz (0, prev->cctx, 1, coro_cctx);
1011 prev->flags &= ~CF_NEW; 1699 prev->flags &= ~CF_NEW;
1012 prev->flags |= CF_RUNNING; 1700 prev->flags |= CF_RUNNING;
1013 } 1701 }
1014 1702
1015 prev->flags &= ~CF_RUNNING; 1703 prev->flags &= ~CF_RUNNING;
1016 next->flags |= CF_RUNNING; 1704 next->flags |= CF_RUNNING;
1017 1705
1018 LOCK; 1706 /* first get rid of the old state */
1707 save_perl (aTHX_ prev);
1019 1708
1020 if (next->flags & CF_NEW) 1709 if (ecb_expect_false (next->flags & CF_NEW))
1021 { 1710 {
1022 /* need to start coroutine */ 1711 /* need to start coroutine */
1023 next->flags &= ~CF_NEW; 1712 next->flags &= ~CF_NEW;
1024 /* first get rid of the old state */
1025 save_perl (aTHX_ prev);
1026 /* setup coroutine call */ 1713 /* setup coroutine call */
1027 coro_setup (aTHX_ next); 1714 init_perl (aTHX_ next);
1028 } 1715 }
1029 else 1716 else
1717 load_perl (aTHX_ next);
1718
1719 /* possibly untie and reuse the cctx */
1720 if (ecb_expect_true (
1721 cctx_current->idle_sp == STACKLEVEL
1722 && !(cctx_current->flags & CC_TRACE)
1723 && !force_cctx
1724 ))
1030 { 1725 {
1031 /* coroutine already started */ 1726 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1032 save_perl (aTHX_ prev); 1727 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1033 load_perl (aTHX_ next); 1728
1729 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1730 /* without this the next cctx_get might destroy the running cctx while still in use */
1731 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1732 if (ecb_expect_true (!next->cctx))
1733 next->cctx = cctx_get (aTHX);
1734
1735 cctx_put (cctx_current);
1034 } 1736 }
1737 else
1738 prev->cctx = cctx_current;
1035 1739
1036 prev__cctx = prev->cctx; 1740 ++next->usecount;
1037 1741
1038 /* possibly "free" the cctx */ 1742 cctx_prev = cctx_current;
1039 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)) 1743 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1744
1745 next->cctx = 0;
1746
1747 if (ecb_expect_false (cctx_prev != cctx_current))
1040 { 1748 {
1041 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1749 cctx_prev->top_env = PL_top_env;
1042 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1750 PL_top_env = cctx_current->top_env;
1043 1751 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1044 prev->cctx = 0;
1045
1046 cctx_put (prev__cctx);
1047 } 1752 }
1048 1753
1049 ++next->usecount; 1754 transfer_tail (aTHX);
1050
1051 if (!next->cctx)
1052 next->cctx = cctx_get (aTHX);
1053
1054 if (prev__cctx != next->cctx)
1055 {
1056 prev__cctx->top_env = PL_top_env;
1057 PL_top_env = next->cctx->top_env;
1058 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1059 }
1060
1061 free_coro_mortal (aTHX);
1062 UNLOCK;
1063 } 1755 }
1064} 1756}
1065 1757
1066struct transfer_args
1067{
1068 struct coro *prev, *next;
1069};
1070
1071#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1758#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1072#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1759#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1073 1760
1074/** high level stuff ********************************************************/ 1761/** high level stuff ********************************************************/
1075 1762
1763/* this function is actually Coro, not Coro::State, but we call it from here */
1764/* because it is convenient - but it hasn't been declared yet for that reason */
1076static int 1765static void
1766coro_call_on_destroy (pTHX_ struct coro *coro);
1767
1768static void
1077coro_state_destroy (pTHX_ struct coro *coro) 1769coro_state_destroy (pTHX_ struct coro *coro)
1078{ 1770{
1079 if (coro->flags & CF_DESTROYED) 1771 if (coro->flags & CF_ZOMBIE)
1080 return 0; 1772 return;
1081 1773
1774 slf_destroy (aTHX_ coro);
1775
1082 coro->flags |= CF_DESTROYED; 1776 coro->flags |= CF_ZOMBIE;
1083 1777
1084 if (coro->flags & CF_READY) 1778 if (coro->flags & CF_READY)
1085 { 1779 {
1086 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1780 /* reduce nready, as destroying a ready coro effectively unreadies it */
1087 /* alternative: look through all ready queues and remove the coro */ 1781 /* alternative: look through all ready queues and remove the coro */
1088 LOCK;
1089 --coro_nready; 1782 --coro_nready;
1090 UNLOCK;
1091 } 1783 }
1092 else 1784 else
1093 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1785 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1094
1095 if (coro->mainstack && coro->mainstack != main_mainstack)
1096 {
1097 struct coro temp;
1098
1099 if (coro->flags & CF_RUNNING)
1100 croak ("FATAL: tried to destroy currently running coroutine");
1101
1102 save_perl (aTHX_ &temp);
1103 load_perl (aTHX_ coro);
1104
1105 coro_destroy (aTHX_ coro);
1106
1107 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1108
1109 coro->mainstack = 0;
1110 }
1111
1112 cctx_destroy (coro->cctx);
1113 SvREFCNT_dec (coro->args);
1114 1786
1115 if (coro->next) coro->next->prev = coro->prev; 1787 if (coro->next) coro->next->prev = coro->prev;
1116 if (coro->prev) coro->prev->next = coro->next; 1788 if (coro->prev) coro->prev->next = coro->next;
1117 if (coro == coro_first) coro_first = coro->next; 1789 if (coro == coro_first) coro_first = coro->next;
1118 1790
1119 return 1; 1791 if (coro->mainstack
1792 && coro->mainstack != main_mainstack
1793 && coro->slot
1794 && !PL_dirty)
1795 destroy_perl (aTHX_ coro);
1796
1797 cctx_destroy (coro->cctx);
1798 SvREFCNT_dec (coro->startcv);
1799 SvREFCNT_dec (coro->args);
1800 SvREFCNT_dec (coro->swap_sv);
1801 SvREFCNT_dec (CORO_THROW);
1802
1803 coro_call_on_destroy (aTHX_ coro);
1804
1805 /* more destruction mayhem in coro_state_free */
1120} 1806}
1121 1807
1122static int 1808static int
1123coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1809coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1124{ 1810{
1125 struct coro *coro = (struct coro *)mg->mg_ptr; 1811 struct coro *coro = (struct coro *)mg->mg_ptr;
1126 mg->mg_ptr = 0; 1812 mg->mg_ptr = 0;
1127 1813
1128 coro->hv = 0;
1129
1130 if (--coro->refcnt < 0)
1131 {
1132 coro_state_destroy (aTHX_ coro); 1814 coro_state_destroy (aTHX_ coro);
1815 SvREFCNT_dec (coro->on_destroy);
1816 SvREFCNT_dec (coro->status);
1817
1133 Safefree (coro); 1818 Safefree (coro);
1134 }
1135 1819
1136 return 0; 1820 return 0;
1137} 1821}
1138 1822
1139static int 1823static int ecb_cold
1140coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1824coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1141{ 1825{
1142 struct coro *coro = (struct coro *)mg->mg_ptr; 1826 /* called when perl clones the current process the slow way (windows process emulation) */
1143 1827 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1144 ++coro->refcnt; 1828 mg->mg_ptr = 0;
1829 mg->mg_virtual = 0;
1145 1830
1146 return 0; 1831 return 0;
1147} 1832}
1148 1833
1149static MGVTBL coro_state_vtbl = { 1834static MGVTBL coro_state_vtbl = {
… …
1156# define MGf_DUP 0 1841# define MGf_DUP 0
1157#endif 1842#endif
1158}; 1843};
1159 1844
1160static void 1845static void
1161prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1846prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1162{ 1847{
1163 ta->prev = SvSTATE (prev_sv); 1848 ta->prev = SvSTATE (prev_sv);
1164 ta->next = SvSTATE (next_sv); 1849 ta->next = SvSTATE (next_sv);
1165 TRANSFER_CHECK (*ta); 1850 TRANSFER_CHECK (*ta);
1166} 1851}
1167 1852
1168static void 1853static void
1169api_transfer (SV *prev_sv, SV *next_sv) 1854api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1855{
1856 struct coro_transfer_args ta;
1857
1858 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1859 TRANSFER (ta, 1);
1860}
1861
1862/** Coro ********************************************************************/
1863
1864ecb_inline void
1865coro_enq (pTHX_ struct coro *coro)
1866{
1867 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1868
1869 SvREFCNT_inc_NN (coro->hv);
1870
1871 coro->next_ready = 0;
1872 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1873 ready [1] = coro;
1874}
1875
1876ecb_inline struct coro *
1877coro_deq (pTHX)
1878{
1879 int prio;
1880
1881 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1882 {
1883 struct coro **ready = coro_ready [prio];
1884
1885 if (ready [0])
1886 {
1887 struct coro *coro = ready [0];
1888 ready [0] = coro->next_ready;
1889 return coro;
1890 }
1891 }
1892
1893 return 0;
1894}
1895
1896static void
1897invoke_sv_ready_hook_helper (void)
1170{ 1898{
1171 dTHX; 1899 dTHX;
1172 struct transfer_args ta; 1900 dSP;
1173 1901
1174 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1902 ENTER;
1175 TRANSFER (ta); 1903 SAVETMPS;
1176}
1177 1904
1178/** Coro ********************************************************************/ 1905 PUSHMARK (SP);
1906 PUTBACK;
1907 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1179 1908
1180static void 1909 FREETMPS;
1181coro_enq (pTHX_ SV *coro_sv) 1910 LEAVE;
1182{
1183 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1184}
1185
1186static SV *
1187coro_deq (pTHX_ int min_prio)
1188{
1189 int prio = PRIO_MAX - PRIO_MIN;
1190
1191 min_prio -= PRIO_MIN;
1192 if (min_prio < 0)
1193 min_prio = 0;
1194
1195 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1196 if (AvFILLp (coro_ready [prio]) >= 0)
1197 return av_shift (coro_ready [prio]);
1198
1199 return 0;
1200} 1911}
1201 1912
1202static int 1913static int
1203api_ready (SV *coro_sv) 1914api_ready (pTHX_ SV *coro_sv)
1204{ 1915{
1205 dTHX;
1206 struct coro *coro;
1207
1208 if (SvROK (coro_sv))
1209 coro_sv = SvRV (coro_sv);
1210
1211 coro = SvSTATE (coro_sv); 1916 struct coro *coro = SvSTATE (coro_sv);
1212 1917
1213 if (coro->flags & CF_READY) 1918 if (coro->flags & CF_READY)
1214 return 0; 1919 return 0;
1215 1920
1216 coro->flags |= CF_READY; 1921 coro->flags |= CF_READY;
1217 1922
1218 LOCK; 1923 coro_enq (aTHX_ coro);
1219 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1924
1220 ++coro_nready; 1925 if (!coro_nready++)
1221 UNLOCK; 1926 if (coroapi.readyhook)
1927 coroapi.readyhook ();
1222 1928
1223 return 1; 1929 return 1;
1224} 1930}
1225 1931
1226static int 1932static int
1227api_is_ready (SV *coro_sv) 1933api_is_ready (pTHX_ SV *coro_sv)
1228{ 1934{
1229 dTHX;
1230 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1935 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1231} 1936}
1232 1937
1233static void 1938/* expects to own a reference to next->hv */
1939ecb_inline void
1234prepare_schedule (pTHX_ struct transfer_args *ta) 1940prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1235{ 1941{
1236 SV *prev_sv, *next_sv;
1237
1238 for (;;)
1239 {
1240 LOCK;
1241 next_sv = coro_deq (aTHX_ PRIO_MIN);
1242
1243 /* nothing to schedule: call the idle handler */
1244 if (!next_sv)
1245 {
1246 dSP;
1247 UNLOCK;
1248
1249 ENTER;
1250 SAVETMPS;
1251
1252 PUSHMARK (SP);
1253 PUTBACK;
1254 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1255
1256 FREETMPS;
1257 LEAVE;
1258 continue;
1259 }
1260
1261 ta->next = SvSTATE (next_sv);
1262
1263 /* cannot transfer to destroyed coros, skip and look for next */
1264 if (ta->next->flags & CF_DESTROYED)
1265 {
1266 UNLOCK;
1267 SvREFCNT_dec (next_sv);
1268 /* coro_nready is already taken care of by destroy */
1269 continue;
1270 }
1271
1272 --coro_nready;
1273 UNLOCK;
1274 break;
1275 }
1276
1277 /* free this only after the transfer */
1278 prev_sv = SvRV (coro_current); 1942 SV *prev_sv = SvRV (coro_current);
1943
1279 ta->prev = SvSTATE (prev_sv); 1944 ta->prev = SvSTATE_hv (prev_sv);
1945 ta->next = next;
1946
1280 TRANSFER_CHECK (*ta); 1947 TRANSFER_CHECK (*ta);
1281 assert (ta->next->flags & CF_READY); 1948
1282 ta->next->flags &= ~CF_READY;
1283 SvRV_set (coro_current, next_sv); 1949 SvRV_set (coro_current, (SV *)next->hv);
1284 1950
1285 LOCK;
1286 free_coro_mortal (aTHX); 1951 free_coro_mortal (aTHX);
1287 coro_mortal = prev_sv; 1952 coro_mortal = prev_sv;
1288 UNLOCK;
1289} 1953}
1290 1954
1291static void 1955static void
1956prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1957{
1958 for (;;)
1959 {
1960 struct coro *next = coro_deq (aTHX);
1961
1962 if (ecb_expect_true (next))
1963 {
1964 /* cannot transfer to destroyed coros, skip and look for next */
1965 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1966 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1967 else
1968 {
1969 next->flags &= ~CF_READY;
1970 --coro_nready;
1971
1972 prepare_schedule_to (aTHX_ ta, next);
1973 break;
1974 }
1975 }
1976 else
1977 {
1978 /* nothing to schedule: call the idle handler */
1979 if (SvROK (sv_idle)
1980 && SvOBJECT (SvRV (sv_idle)))
1981 {
1982 if (SvRV (sv_idle) == SvRV (coro_current))
1983 {
1984 require_pv ("Carp");
1985
1986 {
1987 dSP;
1988
1989 ENTER;
1990 SAVETMPS;
1991
1992 PUSHMARK (SP);
1993 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1994 PUTBACK;
1995 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1996
1997 FREETMPS;
1998 LEAVE;
1999 }
2000 }
2001
2002 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
2003 api_ready (aTHX_ SvRV (sv_idle));
2004 --coro_nready;
2005 }
2006 else
2007 {
2008 /* TODO: deprecated, remove, cannot work reliably *//*D*/
2009 dSP;
2010
2011 ENTER;
2012 SAVETMPS;
2013
2014 PUSHMARK (SP);
2015 PUTBACK;
2016 call_sv (sv_idle, G_VOID | G_DISCARD);
2017
2018 FREETMPS;
2019 LEAVE;
2020 }
2021 }
2022 }
2023}
2024
2025ecb_inline void
1292prepare_cede (pTHX_ struct transfer_args *ta) 2026prepare_cede (pTHX_ struct coro_transfer_args *ta)
1293{ 2027{
1294 api_ready (coro_current); 2028 api_ready (aTHX_ coro_current);
1295 prepare_schedule (aTHX_ ta); 2029 prepare_schedule (aTHX_ ta);
1296} 2030}
1297 2031
2032ecb_inline void
2033prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2034{
2035 SV *prev = SvRV (coro_current);
2036
2037 if (coro_nready)
2038 {
2039 prepare_schedule (aTHX_ ta);
2040 api_ready (aTHX_ prev);
2041 }
2042 else
2043 prepare_nop (aTHX_ ta);
2044}
2045
2046static void
2047api_schedule (pTHX)
2048{
2049 struct coro_transfer_args ta;
2050
2051 prepare_schedule (aTHX_ &ta);
2052 TRANSFER (ta, 1);
2053}
2054
2055static void
2056api_schedule_to (pTHX_ SV *coro_sv)
2057{
2058 struct coro_transfer_args ta;
2059 struct coro *next = SvSTATE (coro_sv);
2060
2061 SvREFCNT_inc_NN (coro_sv);
2062 prepare_schedule_to (aTHX_ &ta, next);
2063}
2064
1298static int 2065static int
1299prepare_cede_notself (pTHX_ struct transfer_args *ta) 2066api_cede (pTHX)
1300{ 2067{
1301 if (coro_nready) 2068 struct coro_transfer_args ta;
1302 { 2069
1303 SV *prev = SvRV (coro_current);
1304 prepare_schedule (aTHX_ ta); 2070 prepare_cede (aTHX_ &ta);
1305 api_ready (prev); 2071
2072 if (ecb_expect_true (ta.prev != ta.next))
2073 {
2074 TRANSFER (ta, 1);
1306 return 1; 2075 return 1;
1307 } 2076 }
1308 else 2077 else
1309 return 0; 2078 return 0;
1310} 2079}
1311 2080
1312static void
1313api_schedule (void)
1314{
1315 dTHX;
1316 struct transfer_args ta;
1317
1318 prepare_schedule (aTHX_ &ta);
1319 TRANSFER (ta);
1320}
1321
1322static int 2081static int
1323api_cede (void) 2082api_cede_notself (pTHX)
1324{ 2083{
1325 dTHX; 2084 if (coro_nready)
2085 {
1326 struct transfer_args ta; 2086 struct coro_transfer_args ta;
1327 2087
1328 prepare_cede (aTHX_ &ta); 2088 prepare_cede_notself (aTHX_ &ta);
1329
1330 if (ta.prev != ta.next)
1331 {
1332 TRANSFER (ta); 2089 TRANSFER (ta, 1);
1333 return 1; 2090 return 1;
1334 } 2091 }
1335 else 2092 else
1336 return 0; 2093 return 0;
1337} 2094}
1338 2095
1339static int 2096static void
1340api_cede_notself (void)
1341{
1342 dTHX;
1343 struct transfer_args ta;
1344
1345 if (prepare_cede_notself (aTHX_ &ta))
1346 {
1347 TRANSFER (ta);
1348 return 1;
1349 }
1350 else
1351 return 0;
1352}
1353
1354static void
1355api_trace (SV *coro_sv, int flags) 2097api_trace (pTHX_ SV *coro_sv, int flags)
1356{ 2098{
1357 dTHX;
1358 struct coro *coro = SvSTATE (coro_sv); 2099 struct coro *coro = SvSTATE (coro_sv);
1359 2100
2101 if (coro->flags & CF_RUNNING)
2102 croak ("cannot enable tracing on a running coroutine, caught");
2103
1360 if (flags & CC_TRACE) 2104 if (flags & CC_TRACE)
1361 { 2105 {
1362 if (!coro->cctx) 2106 if (!coro->cctx)
1363 coro->cctx = cctx_new (); 2107 coro->cctx = cctx_new_run ();
1364 else if (!(coro->cctx->flags & CC_TRACE)) 2108 else if (!(coro->cctx->flags & CC_TRACE))
1365 croak ("cannot enable tracing on coroutine with custom stack"); 2109 croak ("cannot enable tracing on coroutine with custom stack, caught");
1366 2110
1367 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2111 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1368 } 2112 }
1369 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2113 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1370 { 2114 {
1371 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 2115 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1372 2116
1373 if (coro->flags & CF_RUNNING) 2117 if (coro->flags & CF_RUNNING)
1374 PL_runops = RUNOPS_DEFAULT; 2118 PL_runops = RUNOPS_DEFAULT;
1375 else 2119 else
1376 coro->runops = RUNOPS_DEFAULT; 2120 coro->slot->runops = RUNOPS_DEFAULT;
2121 }
2122}
2123
2124static void
2125coro_push_av (pTHX_ AV *av, I32 gimme_v)
2126{
2127 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2128 {
2129 dSP;
2130
2131 if (gimme_v == G_SCALAR)
2132 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2133 else
2134 {
2135 int i;
2136 EXTEND (SP, AvFILLp (av) + 1);
2137
2138 for (i = 0; i <= AvFILLp (av); ++i)
2139 PUSHs (AvARRAY (av)[i]);
2140 }
2141
2142 PUTBACK;
2143 }
2144}
2145
2146static void
2147coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2148{
2149 if (!coro->on_destroy)
2150 coro->on_destroy = newAV ();
2151
2152 av_push (coro->on_destroy, cb);
2153}
2154
2155static void
2156slf_destroy_join (pTHX_ struct CoroSLF *frame)
2157{
2158 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2159}
2160
2161static int
2162slf_check_join (pTHX_ struct CoroSLF *frame)
2163{
2164 struct coro *coro = (struct coro *)frame->data;
2165
2166 if (!coro->status)
2167 return 1;
2168
2169 frame->destroy = 0;
2170
2171 coro_push_av (aTHX_ coro->status, GIMME_V);
2172
2173 SvREFCNT_dec ((SV *)coro->hv);
2174
2175 return 0;
2176}
2177
2178static void
2179slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2180{
2181 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2182
2183 if (items > 1)
2184 croak ("join called with too many arguments");
2185
2186 if (coro->status)
2187 frame->prepare = prepare_nop;
2188 else
2189 {
2190 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2191 frame->prepare = prepare_schedule;
2192 }
2193
2194 frame->check = slf_check_join;
2195 frame->destroy = slf_destroy_join;
2196 frame->data = (void *)coro;
2197 SvREFCNT_inc (coro->hv);
2198}
2199
2200static void
2201coro_call_on_destroy (pTHX_ struct coro *coro)
2202{
2203 AV *od = coro->on_destroy;
2204
2205 if (!od)
2206 return;
2207
2208 coro->on_destroy = 0;
2209 sv_2mortal ((SV *)od);
2210
2211 while (AvFILLp (od) >= 0)
2212 {
2213 SV *cb = sv_2mortal (av_pop (od));
2214
2215 /* coro hv's (and only hv's at the moment) are supported as well */
2216 if (SvSTATEhv_p (aTHX_ cb))
2217 api_ready (aTHX_ cb);
2218 else
2219 {
2220 dSP; /* don't disturb outer sp */
2221 PUSHMARK (SP);
2222
2223 if (coro->status)
2224 {
2225 PUTBACK;
2226 coro_push_av (aTHX_ coro->status, G_ARRAY);
2227 SPAGAIN;
2228 }
2229
2230 PUTBACK;
2231 call_sv (cb, G_VOID | G_DISCARD);
2232 }
2233 }
2234}
2235
2236static void
2237coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2238{
2239 AV *av;
2240
2241 if (coro->status)
2242 {
2243 av = coro->status;
2244 av_clear (av);
2245 }
2246 else
2247 av = coro->status = newAV ();
2248
2249 /* items are actually not so common, so optimise for this case */
2250 if (items)
2251 {
2252 int i;
2253
2254 av_extend (av, items - 1);
2255
2256 for (i = 0; i < items; ++i)
2257 av_push (av, SvREFCNT_inc_NN (arg [i]));
2258 }
2259}
2260
2261static void
2262slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2263{
2264 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2265 api_ready (aTHX_ sv_manager);
2266
2267 frame->prepare = prepare_schedule;
2268 frame->check = slf_check_repeat;
2269
2270 /* as a minor optimisation, we could unwind all stacks here */
2271 /* but that puts extra pressure on pp_slf, and is not worth much */
2272 /*coro_unwind_stacks (aTHX);*/
2273}
2274
2275static void
2276slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2277{
2278 HV *coro_hv = (HV *)SvRV (coro_current);
2279
2280 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2281 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2282}
2283
2284static void
2285slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2286{
2287 HV *coro_hv;
2288 struct coro *coro;
2289
2290 if (items <= 0)
2291 croak ("Coro::cancel called without coro object,");
2292
2293 coro = SvSTATE (arg [0]);
2294 coro_hv = coro->hv;
2295
2296 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2297
2298 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2299 {
2300 /* coro currently busy cancelling something, so just notify it */
2301 coro->slf_frame.data = (void *)coro;
2302
2303 frame->prepare = prepare_nop;
2304 frame->check = slf_check_nop;
2305 }
2306 else if (coro_hv == (HV *)SvRV (coro_current))
2307 {
2308 /* cancelling the current coro is allowed, and equals terminate */
2309 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2310 }
2311 else
2312 {
2313 struct coro *self = SvSTATE_current;
2314
2315 if (!self)
2316 croak ("Coro::cancel called outside of thread content,");
2317
2318 /* otherwise we cancel directly, purely for speed reasons
2319 * unfortunately, this requires some magic trickery, as
2320 * somebody else could cancel us, so we have to fight the cancellation.
2321 * this is ugly, and hopefully fully worth the extra speed.
2322 * besides, I can't get the slow-but-safe version working...
2323 */
2324 slf_frame.data = 0;
2325 self->flags |= CF_NOCANCEL;
2326 coro_state_destroy (aTHX_ coro);
2327 self->flags &= ~CF_NOCANCEL;
2328
2329 if (slf_frame.data)
2330 {
2331 /* while we were busy we have been cancelled, so terminate */
2332 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2333 }
2334 else
2335 {
2336 frame->prepare = prepare_nop;
2337 frame->check = slf_check_nop;
2338 }
2339 }
2340}
2341
2342static int
2343slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2344{
2345 frame->prepare = 0;
2346 coro_unwind_stacks (aTHX);
2347
2348 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2349
2350 return 1;
2351}
2352
2353static int
2354safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2355{
2356 if (coro->cctx)
2357 croak ("coro inside C callback, unable to cancel at this time, caught");
2358
2359 if (coro->flags & CF_NEW)
2360 {
2361 coro_set_status (aTHX_ coro, arg, items);
2362 coro_state_destroy (aTHX_ coro);
2363 }
2364 else
2365 {
2366 if (!coro->slf_frame.prepare)
2367 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2368
2369 slf_destroy (aTHX_ coro);
2370
2371 coro_set_status (aTHX_ coro, arg, items);
2372 coro->slf_frame.prepare = prepare_nop;
2373 coro->slf_frame.check = slf_check_safe_cancel;
2374
2375 api_ready (aTHX_ (SV *)coro->hv);
2376 }
2377
2378 return 1;
2379}
2380
2381/*****************************************************************************/
2382/* async pool handler */
2383
2384static int
2385slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2386{
2387 HV *hv = (HV *)SvRV (coro_current);
2388 struct coro *coro = (struct coro *)frame->data;
2389
2390 if (!coro->invoke_cb)
2391 return 1; /* loop till we have invoke */
2392 else
2393 {
2394 hv_store (hv, "desc", sizeof ("desc") - 1,
2395 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2396
2397 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2398
2399 {
2400 dSP;
2401 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2402 PUTBACK;
1377 } 2403 }
2404
2405 SvREFCNT_dec (GvAV (PL_defgv));
2406 GvAV (PL_defgv) = coro->invoke_av;
2407 coro->invoke_av = 0;
2408
2409 return 0;
2410 }
1378} 2411}
2412
2413static void
2414slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2415{
2416 HV *hv = (HV *)SvRV (coro_current);
2417 struct coro *coro = SvSTATE_hv ((SV *)hv);
2418
2419 if (ecb_expect_true (coro->saved_deffh))
2420 {
2421 /* subsequent iteration */
2422 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2423 coro->saved_deffh = 0;
2424
2425 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2426 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2427 {
2428 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2429 return;
2430 }
2431 else
2432 {
2433 av_clear (GvAV (PL_defgv));
2434 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2435
2436 if (ecb_expect_false (coro->swap_sv))
2437 {
2438 swap_svs_leave (coro);
2439 SvREFCNT_dec_NN (coro->swap_sv);
2440 coro->swap_sv = 0;
2441 }
2442
2443 coro->prio = 0;
2444
2445 if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2446 api_trace (aTHX_ coro_current, 0);
2447
2448 frame->prepare = prepare_schedule;
2449 av_push (av_async_pool, SvREFCNT_inc (hv));
2450 }
2451 }
2452 else
2453 {
2454 /* first iteration, simply fall through */
2455 frame->prepare = prepare_nop;
2456 }
2457
2458 frame->check = slf_check_pool_handler;
2459 frame->data = (void *)coro;
2460}
2461
2462/*****************************************************************************/
2463/* rouse callback */
2464
2465#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2466
2467static void
2468coro_rouse_callback (pTHX_ CV *cv)
2469{
2470 dXSARGS;
2471 SV *data = (SV *)S_GENSUB_ARG;
2472
2473 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2474 {
2475 /* first call, set args */
2476 SV *coro = SvRV (data);
2477 AV *av = newAV ();
2478
2479 SvRV_set (data, (SV *)av);
2480
2481 /* better take a full copy of the arguments */
2482 while (items--)
2483 av_store (av, items, newSVsv (ST (items)));
2484
2485 api_ready (aTHX_ coro);
2486 SvREFCNT_dec (coro);
2487 }
2488
2489 XSRETURN_EMPTY;
2490}
2491
2492static int
2493slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2494{
2495 SV *data = (SV *)frame->data;
2496
2497 if (CORO_THROW)
2498 return 0;
2499
2500 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2501 return 1;
2502
2503 /* now push all results on the stack */
2504 {
2505 dSP;
2506 AV *av = (AV *)SvRV (data);
2507 int i;
2508
2509 EXTEND (SP, AvFILLp (av) + 1);
2510 for (i = 0; i <= AvFILLp (av); ++i)
2511 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2512
2513 /* we have stolen the elements, so set length to zero and free */
2514 AvFILLp (av) = -1;
2515 av_undef (av);
2516
2517 PUTBACK;
2518 }
2519
2520 return 0;
2521}
2522
2523static void
2524slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2525{
2526 SV *cb;
2527
2528 if (items)
2529 cb = arg [0];
2530 else
2531 {
2532 struct coro *coro = SvSTATE_current;
2533
2534 if (!coro->rouse_cb)
2535 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2536
2537 cb = sv_2mortal (coro->rouse_cb);
2538 coro->rouse_cb = 0;
2539 }
2540
2541 if (!SvROK (cb)
2542 || SvTYPE (SvRV (cb)) != SVt_PVCV
2543 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2544 croak ("Coro::rouse_wait called with illegal callback argument,");
2545
2546 {
2547 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2548 SV *data = (SV *)S_GENSUB_ARG;
2549
2550 frame->data = (void *)data;
2551 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2552 frame->check = slf_check_rouse_wait;
2553 }
2554}
2555
2556static SV *
2557coro_new_rouse_cb (pTHX)
2558{
2559 HV *hv = (HV *)SvRV (coro_current);
2560 struct coro *coro = SvSTATE_hv (hv);
2561 SV *data = newRV_inc ((SV *)hv);
2562 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2563
2564 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2565 SvREFCNT_dec (data); /* magicext increases the refcount */
2566
2567 SvREFCNT_dec (coro->rouse_cb);
2568 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2569
2570 return cb;
2571}
2572
2573/*****************************************************************************/
2574/* schedule-like-function opcode (SLF) */
2575
2576static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2577static const CV *slf_cv;
2578static SV **slf_argv;
2579static int slf_argc, slf_arga; /* count, allocated */
2580static I32 slf_ax; /* top of stack, for restore */
2581
2582/* this restores the stack in the case we patched the entersub, to */
2583/* recreate the stack frame as perl will on following calls */
2584/* since entersub cleared the stack */
2585static OP *
2586pp_restore (pTHX)
2587{
2588 int i;
2589 SV **SP = PL_stack_base + slf_ax;
2590
2591 PUSHMARK (SP);
2592
2593 EXTEND (SP, slf_argc + 1);
2594
2595 for (i = 0; i < slf_argc; ++i)
2596 PUSHs (sv_2mortal (slf_argv [i]));
2597
2598 PUSHs ((SV *)CvGV (slf_cv));
2599
2600 RETURNOP (slf_restore.op_first);
2601}
2602
2603static void
2604slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2605{
2606 SV **arg = (SV **)slf_frame.data;
2607
2608 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2609}
2610
2611static void
2612slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2613{
2614 if (items != 2)
2615 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2616
2617 frame->prepare = slf_prepare_transfer;
2618 frame->check = slf_check_nop;
2619 frame->data = (void *)arg; /* let's hope it will stay valid */
2620}
2621
2622static void
2623slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2624{
2625 frame->prepare = prepare_schedule;
2626 frame->check = slf_check_nop;
2627}
2628
2629static void
2630slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2631{
2632 struct coro *next = (struct coro *)slf_frame.data;
2633
2634 SvREFCNT_inc_NN (next->hv);
2635 prepare_schedule_to (aTHX_ ta, next);
2636}
2637
2638static void
2639slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2640{
2641 if (!items)
2642 croak ("Coro::schedule_to expects a coroutine argument, caught");
2643
2644 frame->data = (void *)SvSTATE (arg [0]);
2645 frame->prepare = slf_prepare_schedule_to;
2646 frame->check = slf_check_nop;
2647}
2648
2649static void
2650slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2651{
2652 api_ready (aTHX_ SvRV (coro_current));
2653
2654 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2655}
2656
2657static void
2658slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2659{
2660 frame->prepare = prepare_cede;
2661 frame->check = slf_check_nop;
2662}
2663
2664static void
2665slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2666{
2667 frame->prepare = prepare_cede_notself;
2668 frame->check = slf_check_nop;
2669}
2670
2671/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2672static void
2673slf_destroy (pTHX_ struct coro *coro)
2674{
2675 struct CoroSLF frame = coro->slf_frame;
2676
2677 /*
2678 * The on_destroy below most likely is from an SLF call.
2679 * Since by definition the SLF call will not finish when we destroy
2680 * the coro, we will have to force-finish it here, otherwise
2681 * cleanup functions cannot call SLF functions.
2682 */
2683 coro->slf_frame.prepare = 0;
2684
2685 /* this callback is reserved for slf functions needing to do cleanup */
2686 if (frame.destroy && frame.prepare && !PL_dirty)
2687 frame.destroy (aTHX_ &frame);
2688}
2689
2690/*
2691 * these not obviously related functions are all rolled into one
2692 * function to increase chances that they all will call transfer with the same
2693 * stack offset
2694 * SLF stands for "schedule-like-function".
2695 */
2696static OP *
2697pp_slf (pTHX)
2698{
2699 I32 checkmark; /* mark SP to see how many elements check has pushed */
2700
2701 /* set up the slf frame, unless it has already been set-up */
2702 /* the latter happens when a new coro has been started */
2703 /* or when a new cctx was attached to an existing coroutine */
2704 if (ecb_expect_true (!slf_frame.prepare))
2705 {
2706 /* first iteration */
2707 dSP;
2708 SV **arg = PL_stack_base + TOPMARK + 1;
2709 int items = SP - arg; /* args without function object */
2710 SV *gv = *sp;
2711
2712 /* do a quick consistency check on the "function" object, and if it isn't */
2713 /* for us, divert to the real entersub */
2714 if (SvTYPE (gv) != SVt_PVGV
2715 || !GvCV (gv)
2716 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2717 return PL_ppaddr[OP_ENTERSUB](aTHX);
2718
2719 if (!(PL_op->op_flags & OPf_STACKED))
2720 {
2721 /* ampersand-form of call, use @_ instead of stack */
2722 AV *av = GvAV (PL_defgv);
2723 arg = AvARRAY (av);
2724 items = AvFILLp (av) + 1;
2725 }
2726
2727 /* now call the init function, which needs to set up slf_frame */
2728 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2729 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2730
2731 /* pop args */
2732 SP = PL_stack_base + POPMARK;
2733
2734 PUTBACK;
2735 }
2736
2737 /* now that we have a slf_frame, interpret it! */
2738 /* we use a callback system not to make the code needlessly */
2739 /* complicated, but so we can run multiple perl coros from one cctx */
2740
2741 do
2742 {
2743 struct coro_transfer_args ta;
2744
2745 slf_frame.prepare (aTHX_ &ta);
2746 TRANSFER (ta, 0);
2747
2748 checkmark = PL_stack_sp - PL_stack_base;
2749 }
2750 while (slf_frame.check (aTHX_ &slf_frame));
2751
2752 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2753
2754 /* exception handling */
2755 if (ecb_expect_false (CORO_THROW))
2756 {
2757 SV *exception = sv_2mortal (CORO_THROW);
2758
2759 CORO_THROW = 0;
2760 sv_setsv (ERRSV, exception);
2761 croak (0);
2762 }
2763
2764 /* return value handling - mostly like entersub */
2765 /* make sure we put something on the stack in scalar context */
2766 if (GIMME_V == G_SCALAR
2767 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2768 {
2769 dSP;
2770 SV **bot = PL_stack_base + checkmark;
2771
2772 if (sp == bot) /* too few, push undef */
2773 bot [1] = &PL_sv_undef;
2774 else /* too many, take last one */
2775 bot [1] = *sp;
2776
2777 SP = bot + 1;
2778
2779 PUTBACK;
2780 }
2781
2782 return NORMAL;
2783}
2784
2785static void
2786api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2787{
2788 int i;
2789 SV **arg = PL_stack_base + ax;
2790 int items = PL_stack_sp - arg + 1;
2791
2792 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2793
2794 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2795 && PL_op->op_ppaddr != pp_slf)
2796 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2797
2798 CvFLAGS (cv) |= CVf_SLF;
2799 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2800 slf_cv = cv;
2801
2802 /* we patch the op, and then re-run the whole call */
2803 /* we have to put the same argument on the stack for this to work */
2804 /* and this will be done by pp_restore */
2805 slf_restore.op_next = (OP *)&slf_restore;
2806 slf_restore.op_type = OP_CUSTOM;
2807 slf_restore.op_ppaddr = pp_restore;
2808 slf_restore.op_first = PL_op;
2809
2810 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2811
2812 if (PL_op->op_flags & OPf_STACKED)
2813 {
2814 if (items > slf_arga)
2815 {
2816 slf_arga = items;
2817 Safefree (slf_argv);
2818 New (0, slf_argv, slf_arga, SV *);
2819 }
2820
2821 slf_argc = items;
2822
2823 for (i = 0; i < items; ++i)
2824 slf_argv [i] = SvREFCNT_inc (arg [i]);
2825 }
2826 else
2827 slf_argc = 0;
2828
2829 PL_op->op_ppaddr = pp_slf;
2830 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2831
2832 PL_op = (OP *)&slf_restore;
2833}
2834
2835/*****************************************************************************/
2836/* dynamic wind */
2837
2838static void
2839on_enterleave_call (pTHX_ SV *cb)
2840{
2841 dSP;
2842
2843 PUSHSTACK;
2844
2845 PUSHMARK (SP);
2846 PUTBACK;
2847 call_sv (cb, G_VOID | G_DISCARD);
2848 SPAGAIN;
2849
2850 POPSTACK;
2851}
2852
2853static SV *
2854coro_avp_pop_and_free (pTHX_ AV **avp)
2855{
2856 AV *av = *avp;
2857 SV *res = av_pop (av);
2858
2859 if (AvFILLp (av) < 0)
2860 {
2861 *avp = 0;
2862 SvREFCNT_dec (av);
2863 }
2864
2865 return res;
2866}
2867
2868static void
2869coro_pop_on_enter (pTHX_ void *coro)
2870{
2871 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2872 SvREFCNT_dec (cb);
2873}
2874
2875static void
2876coro_pop_on_leave (pTHX_ void *coro)
2877{
2878 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2879 on_enterleave_call (aTHX_ sv_2mortal (cb));
2880}
2881
2882static void
2883enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2884{
2885 if (!hook)
2886 return;
2887
2888 if (!*avp)
2889 {
2890 *avp = newAV ();
2891 AvREAL_off (*avp);
2892 }
2893
2894 av_push (*avp, (SV *)hook);
2895 av_push (*avp, (SV *)arg);
2896}
2897
2898static void
2899enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2900{
2901 AV *av = *avp;
2902 int i;
2903
2904 if (!av)
2905 return;
2906
2907 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2908 if (AvARRAY (av)[i] == (SV *)hook)
2909 {
2910 if (execute)
2911 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2912
2913 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2914 av_pop (av);
2915 av_pop (av);
2916 break;
2917 }
2918
2919 if (AvFILLp (av) >= 0)
2920 {
2921 *avp = 0;
2922 SvREFCNT_dec_NN (av);
2923 }
2924}
2925
2926static void
2927api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2928{
2929 struct coro *coro = SvSTATE (coro_sv);
2930
2931 if (SvSTATE_current == coro)
2932 if (enter)
2933 enter (aTHX_ enter_arg);
2934
2935 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2936 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2937}
2938
2939static void
2940api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2941{
2942 struct coro *coro = SvSTATE (coro_sv);
2943
2944 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2945 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2946}
2947
2948static void
2949savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2950{
2951 struct coro *coro = SvSTATE_current;
2952
2953 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2954}
2955
2956static void
2957savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2958{
2959 struct coro *coro = SvSTATE_current;
2960
2961 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2962}
2963
2964static void
2965api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2966{
2967 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2968
2969 /* this ought to be much cheaper than malloc + a single destructor call */
2970 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2971 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2972}
2973
2974/*****************************************************************************/
2975/* PerlIO::cede */
2976
2977typedef struct
2978{
2979 PerlIOBuf base;
2980 NV next, every;
2981} PerlIOCede;
2982
2983static IV ecb_cold
2984PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2985{
2986 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2987
2988 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2989 self->next = nvtime () + self->every;
2990
2991 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2992}
2993
2994static SV * ecb_cold
2995PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2996{
2997 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2998
2999 return newSVnv (self->every);
3000}
3001
3002static IV
3003PerlIOCede_flush (pTHX_ PerlIO *f)
3004{
3005 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3006 double now = nvtime ();
3007
3008 if (now >= self->next)
3009 {
3010 api_cede (aTHX);
3011 self->next = now + self->every;
3012 }
3013
3014 return PerlIOBuf_flush (aTHX_ f);
3015}
3016
3017static PerlIO_funcs PerlIO_cede =
3018{
3019 sizeof(PerlIO_funcs),
3020 "cede",
3021 sizeof(PerlIOCede),
3022 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
3023 PerlIOCede_pushed,
3024 PerlIOBuf_popped,
3025 PerlIOBuf_open,
3026 PerlIOBase_binmode,
3027 PerlIOCede_getarg,
3028 PerlIOBase_fileno,
3029 PerlIOBuf_dup,
3030 PerlIOBuf_read,
3031 PerlIOBuf_unread,
3032 PerlIOBuf_write,
3033 PerlIOBuf_seek,
3034 PerlIOBuf_tell,
3035 PerlIOBuf_close,
3036 PerlIOCede_flush,
3037 PerlIOBuf_fill,
3038 PerlIOBase_eof,
3039 PerlIOBase_error,
3040 PerlIOBase_clearerr,
3041 PerlIOBase_setlinebuf,
3042 PerlIOBuf_get_base,
3043 PerlIOBuf_bufsiz,
3044 PerlIOBuf_get_ptr,
3045 PerlIOBuf_get_cnt,
3046 PerlIOBuf_set_ptrcnt,
3047};
3048
3049/*****************************************************************************/
3050/* Coro::Semaphore & Coro::Signal */
3051
3052static SV *
3053coro_waitarray_new (pTHX_ int count)
3054{
3055 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3056 AV *av = newAV ();
3057 SV **ary;
3058
3059 /* unfortunately, building manually saves memory */
3060 Newx (ary, 2, SV *);
3061 AvALLOC (av) = ary;
3062#if PERL_VERSION_ATLEAST (5,10,0)
3063 AvARRAY (av) = ary;
3064#else
3065 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3066 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3067 SvPVX ((SV *)av) = (char *)ary;
3068#endif
3069 AvMAX (av) = 1;
3070 AvFILLp (av) = 0;
3071 ary [0] = newSViv (count);
3072
3073 return newRV_noinc ((SV *)av);
3074}
3075
3076/* semaphore */
3077
3078static void
3079coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3080{
3081 SV *count_sv = AvARRAY (av)[0];
3082 IV count = SvIVX (count_sv);
3083
3084 count += adjust;
3085 SvIVX (count_sv) = count;
3086
3087 /* now wake up as many waiters as are expected to lock */
3088 while (count > 0 && AvFILLp (av) > 0)
3089 {
3090 SV *cb;
3091
3092 /* swap first two elements so we can shift a waiter */
3093 AvARRAY (av)[0] = AvARRAY (av)[1];
3094 AvARRAY (av)[1] = count_sv;
3095 cb = av_shift (av);
3096
3097 if (SvOBJECT (cb))
3098 {
3099 api_ready (aTHX_ cb);
3100 --count;
3101 }
3102 else if (SvTYPE (cb) == SVt_PVCV)
3103 {
3104 dSP;
3105 PUSHMARK (SP);
3106 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3107 PUTBACK;
3108 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3109 }
3110
3111 SvREFCNT_dec_NN (cb);
3112 }
3113}
3114
3115static void
3116coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3117{
3118 /* call $sem->adjust (0) to possibly wake up some other waiters */
3119 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3120}
3121
3122static int
3123slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
3124{
3125 AV *av = (AV *)frame->data;
3126 SV *count_sv = AvARRAY (av)[0];
3127 SV *coro_hv = SvRV (coro_current);
3128
3129 frame->destroy = 0;
3130
3131 /* if we are about to throw, don't actually acquire the lock, just throw */
3132 if (ecb_expect_false (CORO_THROW))
3133 {
3134 /* we still might be responsible for the semaphore, so wake up others */
3135 coro_semaphore_adjust (aTHX_ av, 0);
3136
3137 return 0;
3138 }
3139 else if (SvIVX (count_sv) > 0)
3140 {
3141 if (acquire)
3142 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3143 else
3144 coro_semaphore_adjust (aTHX_ av, 0);
3145
3146 return 0;
3147 }
3148 else
3149 {
3150 int i;
3151 /* if we were woken up but can't down, we look through the whole */
3152 /* waiters list and only add us if we aren't in there already */
3153 /* this avoids some degenerate memory usage cases */
3154 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3155 if (AvARRAY (av)[i] == coro_hv)
3156 return 1;
3157
3158 av_push (av, SvREFCNT_inc (coro_hv));
3159 return 1;
3160 }
3161}
3162
3163static int
3164slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3165{
3166 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3167}
3168
3169static int
3170slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3171{
3172 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3173}
3174
3175static void
3176slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3177{
3178 AV *av = (AV *)SvRV (arg [0]);
3179
3180 if (SvIVX (AvARRAY (av)[0]) > 0)
3181 {
3182 frame->data = (void *)av;
3183 frame->prepare = prepare_nop;
3184 }
3185 else
3186 {
3187 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3188
3189 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3190 frame->prepare = prepare_schedule;
3191 /* to avoid race conditions when a woken-up coro gets terminated */
3192 /* we arrange for a temporary on_destroy that calls adjust (0) */
3193 frame->destroy = coro_semaphore_destroy;
3194 }
3195}
3196
3197static void
3198slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3199{
3200 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3201 frame->check = slf_check_semaphore_down;
3202}
3203
3204static void
3205slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3206{
3207 if (items >= 2)
3208 {
3209 /* callback form */
3210 AV *av = (AV *)SvRV (arg [0]);
3211 SV *cb_cv = s_get_cv_croak (arg [1]);
3212
3213 av_push (av, SvREFCNT_inc_NN (cb_cv));
3214
3215 if (SvIVX (AvARRAY (av)[0]) > 0)
3216 coro_semaphore_adjust (aTHX_ av, 0);
3217
3218 frame->prepare = prepare_nop;
3219 frame->check = slf_check_nop;
3220 }
3221 else
3222 {
3223 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3224 frame->check = slf_check_semaphore_wait;
3225 }
3226}
3227
3228/* signal */
3229
3230static void
3231coro_signal_wake (pTHX_ AV *av, int count)
3232{
3233 SvIVX (AvARRAY (av)[0]) = 0;
3234
3235 /* now signal count waiters */
3236 while (count > 0 && AvFILLp (av) > 0)
3237 {
3238 SV *cb;
3239
3240 /* swap first two elements so we can shift a waiter */
3241 cb = AvARRAY (av)[0];
3242 AvARRAY (av)[0] = AvARRAY (av)[1];
3243 AvARRAY (av)[1] = cb;
3244
3245 cb = av_shift (av);
3246
3247 if (SvTYPE (cb) == SVt_PVCV)
3248 {
3249 dSP;
3250 PUSHMARK (SP);
3251 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3252 PUTBACK;
3253 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3254 }
3255 else
3256 {
3257 api_ready (aTHX_ cb);
3258 sv_setiv (cb, 0); /* signal waiter */
3259 }
3260
3261 SvREFCNT_dec_NN (cb);
3262
3263 --count;
3264 }
3265}
3266
3267static int
3268slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3269{
3270 /* if we are about to throw, also stop waiting */
3271 return SvROK ((SV *)frame->data) && !CORO_THROW;
3272}
3273
3274static void
3275slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3276{
3277 AV *av = (AV *)SvRV (arg [0]);
3278
3279 if (items >= 2)
3280 {
3281 SV *cb_cv = s_get_cv_croak (arg [1]);
3282 av_push (av, SvREFCNT_inc_NN (cb_cv));
3283
3284 if (SvIVX (AvARRAY (av)[0]))
3285 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3286
3287 frame->prepare = prepare_nop;
3288 frame->check = slf_check_nop;
3289 }
3290 else if (SvIVX (AvARRAY (av)[0]))
3291 {
3292 SvIVX (AvARRAY (av)[0]) = 0;
3293 frame->prepare = prepare_nop;
3294 frame->check = slf_check_nop;
3295 }
3296 else
3297 {
3298 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3299
3300 av_push (av, waiter);
3301
3302 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3303 frame->prepare = prepare_schedule;
3304 frame->check = slf_check_signal_wait;
3305 }
3306}
3307
3308/*****************************************************************************/
3309/* Coro::AIO */
3310
3311#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3312
3313/* helper storage struct */
3314struct io_state
3315{
3316 int errorno;
3317 I32 laststype; /* U16 in 5.10.0 */
3318 int laststatval;
3319 Stat_t statcache;
3320};
3321
3322static void
3323coro_aio_callback (pTHX_ CV *cv)
3324{
3325 dXSARGS;
3326 AV *state = (AV *)S_GENSUB_ARG;
3327 SV *coro = av_pop (state);
3328 SV *data_sv = newSV (sizeof (struct io_state));
3329
3330 av_extend (state, items - 1);
3331
3332 sv_upgrade (data_sv, SVt_PV);
3333 SvCUR_set (data_sv, sizeof (struct io_state));
3334 SvPOK_only (data_sv);
3335
3336 {
3337 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3338
3339 data->errorno = errno;
3340 data->laststype = PL_laststype;
3341 data->laststatval = PL_laststatval;
3342 data->statcache = PL_statcache;
3343 }
3344
3345 /* now build the result vector out of all the parameters and the data_sv */
3346 {
3347 int i;
3348
3349 for (i = 0; i < items; ++i)
3350 av_push (state, SvREFCNT_inc_NN (ST (i)));
3351 }
3352
3353 av_push (state, data_sv);
3354
3355 api_ready (aTHX_ coro);
3356 SvREFCNT_dec_NN (coro);
3357 SvREFCNT_dec_NN ((AV *)state);
3358}
3359
3360static int
3361slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3362{
3363 AV *state = (AV *)frame->data;
3364
3365 /* if we are about to throw, return early */
3366 /* this does not cancel the aio request, but at least */
3367 /* it quickly returns */
3368 if (CORO_THROW)
3369 return 0;
3370
3371 /* one element that is an RV? repeat! */
3372 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3373 return 1;
3374
3375 /* restore status */
3376 {
3377 SV *data_sv = av_pop (state);
3378 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3379
3380 errno = data->errorno;
3381 PL_laststype = data->laststype;
3382 PL_laststatval = data->laststatval;
3383 PL_statcache = data->statcache;
3384
3385 SvREFCNT_dec_NN (data_sv);
3386 }
3387
3388 /* push result values */
3389 {
3390 dSP;
3391 int i;
3392
3393 EXTEND (SP, AvFILLp (state) + 1);
3394 for (i = 0; i <= AvFILLp (state); ++i)
3395 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3396
3397 PUTBACK;
3398 }
3399
3400 return 0;
3401}
3402
3403static void
3404slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3405{
3406 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3407 SV *coro_hv = SvRV (coro_current);
3408 struct coro *coro = SvSTATE_hv (coro_hv);
3409
3410 /* put our coroutine id on the state arg */
3411 av_push (state, SvREFCNT_inc_NN (coro_hv));
3412
3413 /* first see whether we have a non-zero priority and set it as AIO prio */
3414 if (coro->prio)
3415 {
3416 dSP;
3417
3418 static SV *prio_cv;
3419 static SV *prio_sv;
3420
3421 if (ecb_expect_false (!prio_cv))
3422 {
3423 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3424 prio_sv = newSViv (0);
3425 }
3426
3427 PUSHMARK (SP);
3428 sv_setiv (prio_sv, coro->prio);
3429 XPUSHs (prio_sv);
3430
3431 PUTBACK;
3432 call_sv (prio_cv, G_VOID | G_DISCARD);
3433 }
3434
3435 /* now call the original request */
3436 {
3437 dSP;
3438 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3439 int i;
3440
3441 PUSHMARK (SP);
3442
3443 /* first push all args to the stack */
3444 EXTEND (SP, items + 1);
3445
3446 for (i = 0; i < items; ++i)
3447 PUSHs (arg [i]);
3448
3449 /* now push the callback closure */
3450 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3451
3452 /* now call the AIO function - we assume our request is uncancelable */
3453 PUTBACK;
3454 call_sv ((SV *)req, G_VOID | G_DISCARD);
3455 }
3456
3457 /* now that the request is going, we loop till we have a result */
3458 frame->data = (void *)state;
3459 frame->prepare = prepare_schedule;
3460 frame->check = slf_check_aio_req;
3461}
3462
3463static void
3464coro_aio_req_xs (pTHX_ CV *cv)
3465{
3466 dXSARGS;
3467
3468 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3469
3470 XSRETURN_EMPTY;
3471}
3472
3473/*****************************************************************************/
3474
3475#if CORO_CLONE
3476# include "clone.c"
3477#endif
3478
3479/*****************************************************************************/
3480
3481static SV *
3482coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3483{
3484 SV *coro_sv;
3485 struct coro *coro;
3486 MAGIC *mg;
3487 HV *hv;
3488 SV *cb;
3489 int i;
3490
3491 if (argc > 0)
3492 {
3493 cb = s_get_cv_croak (argv [0]);
3494
3495 if (!is_coro)
3496 {
3497 if (CvISXSUB (cb))
3498 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3499
3500 if (!CvROOT (cb))
3501 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3502 }
3503 }
3504
3505 Newz (0, coro, 1, struct coro);
3506 coro->args = newAV ();
3507 coro->flags = CF_NEW;
3508
3509 if (coro_first) coro_first->prev = coro;
3510 coro->next = coro_first;
3511 coro_first = coro;
3512
3513 coro->hv = hv = newHV ();
3514 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3515 mg->mg_flags |= MGf_DUP;
3516 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3517
3518 if (argc > 0)
3519 {
3520 av_extend (coro->args, argc + is_coro - 1);
3521
3522 if (is_coro)
3523 {
3524 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3525 cb = (SV *)cv_coro_run;
3526 }
3527
3528 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3529
3530 for (i = 1; i < argc; i++)
3531 av_push (coro->args, newSVsv (argv [i]));
3532 }
3533
3534 return coro_sv;
3535}
3536
3537#ifndef __cplusplus
3538ecb_cold XS(boot_Coro__State);
3539#endif
3540
3541#if CORO_JIT
3542
3543static void ecb_noinline ecb_cold
3544pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3545{
3546 dSP;
3547 AV *av = newAV ();
3548
3549 av_store (av, 3, newSVuv (d));
3550 av_store (av, 2, newSVuv (c));
3551 av_store (av, 1, newSVuv (b));
3552 av_store (av, 0, newSVuv (a));
3553
3554 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3555
3556 PUTBACK;
3557}
3558
3559static void ecb_noinline ecb_cold
3560jit_init (pTHX)
3561{
3562 dSP;
3563 SV *load, *save;
3564 char *map_base;
3565 char *load_ptr, *save_ptr;
3566 STRLEN load_len, save_len, map_len;
3567 int count;
3568
3569 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3570
3571 PUSHMARK (SP);
3572 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3573 #include "state.h"
3574 count = call_pv ("Coro::State::_jit", G_ARRAY);
3575 SPAGAIN;
3576
3577 save = POPs; save_ptr = SvPVbyte (save, save_len);
3578 load = POPs; load_ptr = SvPVbyte (load, load_len);
3579
3580 map_len = load_len + save_len + 16;
3581
3582 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3583
3584 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3585
3586 load_perl_slots = (load_save_perl_slots_type)map_base;
3587 memcpy (map_base, load_ptr, load_len);
3588
3589 map_base += (load_len + 15) & ~15;
3590
3591 save_perl_slots = (load_save_perl_slots_type)map_base;
3592 memcpy (map_base, save_ptr, save_len);
3593
3594 /* we are good citizens and try to make the page read-only, so the evil evil */
3595 /* hackers might have it a bit more difficult */
3596 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3597
3598 PUTBACK;
3599 eval_pv ("undef &Coro::State::_jit", 1);
3600}
3601
3602#endif
1379 3603
1380MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3604MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1381 3605
1382PROTOTYPES: DISABLE 3606PROTOTYPES: DISABLE
1383 3607
1384BOOT: 3608BOOT:
1385{ 3609{
3610#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3611#include "state.h"
1386#ifdef USE_ITHREADS 3612#ifdef USE_ITHREADS
1387 MUTEX_INIT (&coro_mutex); 3613# if CORO_PTHREAD
3614 coro_thx = PERL_GET_CONTEXT;
1388#endif 3615# endif
1389 BOOT_PAGESIZE; 3616#endif
3617 /* perl defines these to check for existance first, but why it doesn't */
3618 /* just create them one at init time is not clear to me, except for */
3619 /* programs trying to delete them, but... */
3620 /* anyway, we declare this as invalid and make sure they are initialised here */
3621 DEFSV;
3622 ERRSV;
3623
3624 cctx_current = cctx_new_empty ();
1390 3625
1391 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3626 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1392 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3627 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3628
3629 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3630 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3631 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3632
3633 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3634 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1393 3635
1394 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3636 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1395 3637
1396 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3638 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1397 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3639 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1402 main_top_env = PL_top_env; 3644 main_top_env = PL_top_env;
1403 3645
1404 while (main_top_env->je_prev) 3646 while (main_top_env->je_prev)
1405 main_top_env = main_top_env->je_prev; 3647 main_top_env = main_top_env->je_prev;
1406 3648
3649 {
3650 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3651
3652 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3653 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3654
3655 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3656 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3657 }
3658
1407 coroapi.ver = CORO_API_VERSION; 3659 coroapi.ver = CORO_API_VERSION;
3660 coroapi.rev = CORO_API_REVISION;
3661
1408 coroapi.transfer = api_transfer; 3662 coroapi.transfer = api_transfer;
1409 3663
3664 coroapi.sv_state = SvSTATE_;
3665 coroapi.execute_slf = api_execute_slf;
3666 coroapi.prepare_nop = prepare_nop;
3667 coroapi.prepare_schedule = prepare_schedule;
3668 coroapi.prepare_cede = prepare_cede;
3669 coroapi.prepare_cede_notself = prepare_cede_notself;
3670
3671 time_init (aTHX);
3672
1410 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3673 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3674#if CORO_JIT
3675 PUTBACK;
3676 jit_init (aTHX);
3677 SPAGAIN;
3678#endif
1411} 3679}
1412 3680
1413SV * 3681SV *
1414new (char *klass, ...) 3682new (SV *klass, ...)
3683 ALIAS:
3684 Coro::new = 1
1415 CODE: 3685 CODE:
1416{ 3686 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1417 struct coro *coro;
1418 HV *hv;
1419 int i;
1420
1421 Newz (0, coro, 1, struct coro);
1422 coro->args = newAV ();
1423 coro->flags = CF_NEW;
1424
1425 if (coro_first) coro_first->prev = coro;
1426 coro->next = coro_first;
1427 coro_first = coro;
1428
1429 coro->hv = hv = newHV ();
1430 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1431 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1432
1433 av_extend (coro->args, items - 1);
1434
1435 for (i = 1; i < items; i++)
1436 av_push (coro->args, newSVsv (ST (i)));
1437}
1438 OUTPUT:
1439 RETVAL
1440
1441# these not obviously related functions are all rolled into the same xs
1442# function to increase chances that they all will call transfer with the same
1443# stack offset
1444void
1445_set_stacklevel (...)
1446 ALIAS:
1447 Coro::State::transfer = 1
1448 Coro::schedule = 2
1449 Coro::cede = 3
1450 Coro::cede_notself = 4
1451 CODE:
1452{
1453 struct transfer_args ta;
1454
1455 switch (ix)
1456 {
1457 case 0:
1458 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1459 ta.next = 0;
1460 break;
1461
1462 case 1:
1463 if (items != 2)
1464 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1465
1466 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1467 break;
1468
1469 case 2:
1470 prepare_schedule (aTHX_ &ta);
1471 break;
1472
1473 case 3:
1474 prepare_cede (aTHX_ &ta);
1475 break;
1476
1477 case 4:
1478 if (!prepare_cede_notself (aTHX_ &ta))
1479 XSRETURN_EMPTY;
1480
1481 break;
1482 }
1483
1484 BARRIER;
1485 TRANSFER (ta);
1486
1487 if (GIMME_V != G_VOID && ta.next != ta.prev)
1488 XSRETURN_YES;
1489}
1490
1491bool
1492_destroy (SV *coro_sv)
1493 CODE:
1494 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1495 OUTPUT: 3687 OUTPUT:
1496 RETVAL 3688 RETVAL
1497 3689
1498void 3690void
1499_exit (code) 3691transfer (...)
1500 int code
1501 PROTOTYPE: $ 3692 PROTOTYPE: $$
1502 CODE: 3693 CODE:
1503 _exit (code); 3694 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3695
3696SV *
3697clone (Coro::State coro)
3698 CODE:
3699{
3700#if CORO_CLONE
3701 struct coro *ncoro = coro_clone (aTHX_ coro);
3702 MAGIC *mg;
3703 /* TODO: too much duplication */
3704 ncoro->hv = newHV ();
3705 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3706 mg->mg_flags |= MGf_DUP;
3707 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3708#else
3709 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3710#endif
3711}
3712 OUTPUT:
3713 RETVAL
1504 3714
1505int 3715int
1506cctx_stacksize (int new_stacksize = 0) 3716cctx_stacksize (int new_stacksize = 0)
3717 PROTOTYPE: ;$
1507 CODE: 3718 CODE:
1508 RETVAL = coro_stacksize; 3719 RETVAL = cctx_stacksize;
1509 if (new_stacksize) 3720 if (new_stacksize)
3721 {
1510 coro_stacksize = new_stacksize; 3722 cctx_stacksize = new_stacksize;
3723 ++cctx_gen;
3724 }
1511 OUTPUT: 3725 OUTPUT:
1512 RETVAL 3726 RETVAL
1513 3727
1514int 3728int
3729cctx_max_idle (int max_idle = 0)
3730 PROTOTYPE: ;$
3731 CODE:
3732 RETVAL = cctx_max_idle;
3733 if (max_idle > 1)
3734 cctx_max_idle = max_idle;
3735 OUTPUT:
3736 RETVAL
3737
3738int
1515cctx_count () 3739cctx_count ()
3740 PROTOTYPE:
1516 CODE: 3741 CODE:
1517 RETVAL = cctx_count; 3742 RETVAL = cctx_count;
1518 OUTPUT: 3743 OUTPUT:
1519 RETVAL 3744 RETVAL
1520 3745
1521int 3746int
1522cctx_idle () 3747cctx_idle ()
3748 PROTOTYPE:
1523 CODE: 3749 CODE:
1524 RETVAL = cctx_idle; 3750 RETVAL = cctx_idle;
1525 OUTPUT: 3751 OUTPUT:
1526 RETVAL 3752 RETVAL
1527 3753
1528void 3754void
1529list () 3755list ()
3756 PROTOTYPE:
1530 PPCODE: 3757 PPCODE:
1531{ 3758{
1532 struct coro *coro; 3759 struct coro *coro;
1533 for (coro = coro_first; coro; coro = coro->next) 3760 for (coro = coro_first; coro; coro = coro->next)
1534 if (coro->hv) 3761 if (coro->hv)
1535 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3762 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1536} 3763}
1537 3764
… …
1539call (Coro::State coro, SV *coderef) 3766call (Coro::State coro, SV *coderef)
1540 ALIAS: 3767 ALIAS:
1541 eval = 1 3768 eval = 1
1542 CODE: 3769 CODE:
1543{ 3770{
1544 if (coro->mainstack) 3771 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1545 { 3772 {
1546 struct coro temp; 3773 struct coro *current = SvSTATE_current;
1547 Zero (&temp, 1, struct coro); 3774 struct CoroSLF slf_save;
1548 3775
1549 if (!(coro->flags & CF_RUNNING)) 3776 if (current != coro)
1550 { 3777 {
3778 PUTBACK;
1551 save_perl (aTHX_ &temp); 3779 save_perl (aTHX_ current);
1552 load_perl (aTHX_ coro); 3780 load_perl (aTHX_ coro);
3781 /* the coro is most likely in an active SLF call.
3782 * while not strictly required (the code we execute is
3783 * not allowed to call any SLF functions), it's cleaner
3784 * to reinitialise the slf_frame and restore it later.
3785 * This might one day allow us to actually do SLF calls
3786 * from code executed here.
3787 */
3788 slf_save = slf_frame;
3789 slf_frame.prepare = 0;
3790 SPAGAIN;
1553 } 3791 }
1554 3792
1555 { 3793 PUSHSTACK;
1556 dSP; 3794
1557 ENTER;
1558 SAVETMPS;
1559 PUSHMARK (SP); 3795 PUSHMARK (SP);
1560 PUTBACK; 3796 PUTBACK;
3797
1561 if (ix) 3798 if (ix)
1562 eval_sv (coderef, 0); 3799 eval_sv (coderef, 0);
1563 else 3800 else
1564 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3801 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3802
3803 POPSTACK;
1565 SPAGAIN; 3804 SPAGAIN;
1566 FREETMPS;
1567 LEAVE;
1568 PUTBACK;
1569 }
1570 3805
1571 if (!(coro->flags & CF_RUNNING)) 3806 if (current != coro)
1572 { 3807 {
3808 PUTBACK;
3809 slf_frame = slf_save;
1573 save_perl (aTHX_ coro); 3810 save_perl (aTHX_ coro);
1574 load_perl (aTHX_ &temp); 3811 load_perl (aTHX_ current);
3812 SPAGAIN;
1575 } 3813 }
1576 } 3814 }
1577} 3815}
1578 3816
1579SV * 3817SV *
… …
1581 PROTOTYPE: $ 3819 PROTOTYPE: $
1582 ALIAS: 3820 ALIAS:
1583 is_ready = CF_READY 3821 is_ready = CF_READY
1584 is_running = CF_RUNNING 3822 is_running = CF_RUNNING
1585 is_new = CF_NEW 3823 is_new = CF_NEW
1586 is_destroyed = CF_DESTROYED 3824 is_destroyed = CF_ZOMBIE
3825 is_zombie = CF_ZOMBIE
3826 is_suspended = CF_SUSPENDED
1587 CODE: 3827 CODE:
1588 RETVAL = boolSV (coro->flags & ix); 3828 RETVAL = boolSV (coro->flags & ix);
1589 OUTPUT: 3829 OUTPUT:
1590 RETVAL 3830 RETVAL
1591 3831
1592void 3832void
3833throw (SV *self, SV *exception = &PL_sv_undef)
3834 PROTOTYPE: $;$
3835 CODE:
3836{
3837 struct coro *coro = SvSTATE (self);
3838 struct coro *current = SvSTATE_current;
3839 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3840 SvREFCNT_dec (*exceptionp);
3841 SvGETMAGIC (exception);
3842 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3843
3844 api_ready (aTHX_ self);
3845}
3846
3847void
1593api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3848api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3849 PROTOTYPE: $;$
3850 C_ARGS: aTHX_ coro, flags
1594 3851
1595SV * 3852SV *
1596has_stack (Coro::State coro) 3853has_cctx (Coro::State coro)
1597 PROTOTYPE: $ 3854 PROTOTYPE: $
1598 CODE: 3855 CODE:
1599 RETVAL = boolSV (!!coro->cctx); 3856 /* maybe manage the running flag differently */
3857 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1600 OUTPUT: 3858 OUTPUT:
1601 RETVAL 3859 RETVAL
1602 3860
1603int 3861int
1604is_traced (Coro::State coro) 3862is_traced (Coro::State coro)
… …
1606 CODE: 3864 CODE:
1607 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3865 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1608 OUTPUT: 3866 OUTPUT:
1609 RETVAL 3867 RETVAL
1610 3868
1611IV 3869UV
1612rss (Coro::State coro) 3870rss (Coro::State coro)
1613 PROTOTYPE: $ 3871 PROTOTYPE: $
1614 ALIAS: 3872 ALIAS:
1615 usecount = 1 3873 usecount = 1
1616 CODE: 3874 CODE:
… …
1620 case 1: RETVAL = coro->usecount; break; 3878 case 1: RETVAL = coro->usecount; break;
1621 } 3879 }
1622 OUTPUT: 3880 OUTPUT:
1623 RETVAL 3881 RETVAL
1624 3882
3883void
3884force_cctx ()
3885 PROTOTYPE:
3886 CODE:
3887 cctx_current->idle_sp = 0;
3888
3889void
3890swap_defsv (Coro::State self)
3891 PROTOTYPE: $
3892 ALIAS:
3893 swap_defav = 1
3894 CODE:
3895 if (!self->slot)
3896 croak ("cannot swap state with coroutine that has no saved state,");
3897 else
3898 {
3899 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3900 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3901
3902 SV *tmp = *src; *src = *dst; *dst = tmp;
3903 }
3904
3905void
3906cancel (Coro::State self)
3907 CODE:
3908 coro_state_destroy (aTHX_ self);
3909
3910SV *
3911enable_times (int enabled = enable_times)
3912 CODE:
3913{
3914 RETVAL = boolSV (enable_times);
3915
3916 if (enabled != enable_times)
3917 {
3918 enable_times = enabled;
3919
3920 coro_times_update ();
3921 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3922 }
3923}
3924 OUTPUT:
3925 RETVAL
3926
3927void
3928times (Coro::State self)
3929 PPCODE:
3930{
3931 struct coro *current = SvSTATE (coro_current);
3932
3933 if (ecb_expect_false (current == self))
3934 {
3935 coro_times_update ();
3936 coro_times_add (SvSTATE (coro_current));
3937 }
3938
3939 EXTEND (SP, 2);
3940 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3941 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3942
3943 if (ecb_expect_false (current == self))
3944 coro_times_sub (SvSTATE (coro_current));
3945}
3946
3947void
3948swap_sv (Coro::State coro, SV *sva, SV *svb)
3949 CODE:
3950{
3951 struct coro *current = SvSTATE_current;
3952 AV *swap_sv;
3953 int i;
3954
3955 sva = SvRV (sva);
3956 svb = SvRV (svb);
3957
3958 if (current == coro)
3959 SWAP_SVS_LEAVE (current);
3960
3961 if (!coro->swap_sv)
3962 coro->swap_sv = newAV ();
3963
3964 swap_sv = coro->swap_sv;
3965
3966 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
3967 {
3968 SV *a = AvARRAY (swap_sv)[i ];
3969 SV *b = AvARRAY (swap_sv)[i + 1];
3970
3971 if (a == sva && b == svb)
3972 {
3973 SvREFCNT_dec_NN (a);
3974 SvREFCNT_dec_NN (b);
3975
3976 for (; i <= AvFILLp (swap_sv) - 2; i++)
3977 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
3978
3979 AvFILLp (swap_sv) -= 2;
3980
3981 goto removed;
3982 }
3983 }
3984
3985 av_push (swap_sv, SvREFCNT_inc_NN (sva));
3986 av_push (swap_sv, SvREFCNT_inc_NN (svb));
3987
3988 removed:
3989
3990 if (current == coro)
3991 SWAP_SVS_ENTER (current);
3992}
3993
1625 3994
1626MODULE = Coro::State PACKAGE = Coro 3995MODULE = Coro::State PACKAGE = Coro
1627 3996
1628BOOT: 3997BOOT:
1629{ 3998{
1630 int i; 3999 if (SVt_LAST > 32)
4000 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
1631 4001
1632 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 4002 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1633 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 4003 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
4004 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
4005 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1634 av_async_pool = get_av ("Coro::async_pool", TRUE); 4006 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4007 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4008 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4009 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1635 4010
1636 coro_current = get_sv ("Coro::current", FALSE); 4011 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1637 SvREADONLY_on (coro_current); 4012 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4013 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4014 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
1638 4015
1639 coro_stash = gv_stashpv ("Coro", TRUE); 4016 coro_stash = gv_stashpv ("Coro", TRUE);
1640 4017
1641 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 4018 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1642 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 4019 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1643 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 4020 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1644 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 4021 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1645 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 4022 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1646 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 4023 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1647
1648 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1649 coro_ready[i] = newAV ();
1650 4024
1651 { 4025 {
1652 SV *sv = perl_get_sv("Coro::API", 1); 4026 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1653 4027
1654 coroapi.schedule = api_schedule; 4028 coroapi.schedule = api_schedule;
4029 coroapi.schedule_to = api_schedule_to;
1655 coroapi.cede = api_cede; 4030 coroapi.cede = api_cede;
1656 coroapi.cede_notself = api_cede_notself; 4031 coroapi.cede_notself = api_cede_notself;
1657 coroapi.ready = api_ready; 4032 coroapi.ready = api_ready;
1658 coroapi.is_ready = api_is_ready; 4033 coroapi.is_ready = api_is_ready;
1659 coroapi.nready = &coro_nready; 4034 coroapi.nready = coro_nready;
1660 coroapi.current = coro_current; 4035 coroapi.current = coro_current;
1661 4036
4037 coroapi.enterleave_hook = api_enterleave_hook;
4038 coroapi.enterleave_unhook = api_enterleave_unhook;
4039 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4040
1662 GCoroAPI = &coroapi; 4041 /*GCoroAPI = &coroapi;*/
1663 sv_setiv (sv, (IV)&coroapi); 4042 sv_setiv (sv, (IV)&coroapi);
1664 SvREADONLY_on (sv); 4043 SvREADONLY_on (sv);
1665 } 4044 }
1666} 4045}
4046
4047SV *
4048async (...)
4049 PROTOTYPE: &@
4050 CODE:
4051 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
4052 api_ready (aTHX_ RETVAL);
4053 OUTPUT:
4054 RETVAL
4055
4056void
4057_destroy (Coro::State coro)
4058 CODE:
4059 /* used by the manager thread */
4060 coro_state_destroy (aTHX_ coro);
4061
4062void
4063on_destroy (Coro::State coro, SV *cb)
4064 CODE:
4065 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4066
4067void
4068join (...)
4069 CODE:
4070 CORO_EXECUTE_SLF_XS (slf_init_join);
4071
4072void
4073terminate (...)
4074 CODE:
4075 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4076
4077void
4078cancel (...)
4079 CODE:
4080 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4081
4082int
4083safe_cancel (Coro::State self, ...)
4084 C_ARGS: aTHX_ self, &ST (1), items - 1
4085
4086void
4087schedule (...)
4088 CODE:
4089 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4090
4091void
4092schedule_to (...)
4093 CODE:
4094 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4095
4096void
4097cede_to (...)
4098 CODE:
4099 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4100
4101void
4102cede (...)
4103 CODE:
4104 CORO_EXECUTE_SLF_XS (slf_init_cede);
4105
4106void
4107cede_notself (...)
4108 CODE:
4109 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1667 4110
1668void 4111void
1669_set_current (SV *current) 4112_set_current (SV *current)
1670 PROTOTYPE: $ 4113 PROTOTYPE: $
1671 CODE: 4114 CODE:
1672 SvREFCNT_dec (SvRV (coro_current)); 4115 SvREFCNT_dec_NN (SvRV (coro_current));
1673 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 4116 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
4117
4118void
4119_set_readyhook (SV *hook)
4120 PROTOTYPE: $
4121 CODE:
4122 SvREFCNT_dec (coro_readyhook);
4123 SvGETMAGIC (hook);
4124 if (SvOK (hook))
4125 {
4126 coro_readyhook = newSVsv (hook);
4127 CORO_READYHOOK = invoke_sv_ready_hook_helper;
4128 }
4129 else
4130 {
4131 coro_readyhook = 0;
4132 CORO_READYHOOK = 0;
4133 }
1674 4134
1675int 4135int
1676prio (Coro::State coro, int newprio = 0) 4136prio (Coro::State coro, int newprio = 0)
4137 PROTOTYPE: $;$
1677 ALIAS: 4138 ALIAS:
1678 nice = 1 4139 nice = 1
1679 CODE: 4140 CODE:
1680{ 4141{
1681 RETVAL = coro->prio; 4142 RETVAL = coro->prio;
… …
1683 if (items > 1) 4144 if (items > 1)
1684 { 4145 {
1685 if (ix) 4146 if (ix)
1686 newprio = coro->prio - newprio; 4147 newprio = coro->prio - newprio;
1687 4148
1688 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 4149 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1689 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 4150 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1690 4151
1691 coro->prio = newprio; 4152 coro->prio = newprio;
1692 } 4153 }
1693} 4154}
1694 OUTPUT: 4155 OUTPUT:
… …
1696 4157
1697SV * 4158SV *
1698ready (SV *self) 4159ready (SV *self)
1699 PROTOTYPE: $ 4160 PROTOTYPE: $
1700 CODE: 4161 CODE:
1701 RETVAL = boolSV (api_ready (self)); 4162 RETVAL = boolSV (api_ready (aTHX_ self));
1702 OUTPUT: 4163 OUTPUT:
1703 RETVAL 4164 RETVAL
1704 4165
1705int 4166int
1706nready (...) 4167nready (...)
… …
1708 CODE: 4169 CODE:
1709 RETVAL = coro_nready; 4170 RETVAL = coro_nready;
1710 OUTPUT: 4171 OUTPUT:
1711 RETVAL 4172 RETVAL
1712 4173
1713# for async_pool speedup
1714void 4174void
1715_pool_1 (SV *cb) 4175suspend (Coro::State self)
4176 PROTOTYPE: $
1716 CODE: 4177 CODE:
1717{ 4178 self->flags |= CF_SUSPENDED;
1718 struct coro *coro = SvSTATE (coro_current);
1719 HV *hv = (HV *)SvRV (coro_current);
1720 AV *defav = GvAV (PL_defgv);
1721 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1722 AV *invoke_av;
1723 int i, len;
1724 4179
1725 if (!invoke) 4180void
1726 croak ("\3terminate\2\n"); 4181resume (Coro::State self)
4182 PROTOTYPE: $
4183 CODE:
4184 self->flags &= ~CF_SUSPENDED;
1727 4185
1728 SvREFCNT_dec (coro->saved_deffh); 4186void
1729 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 4187_pool_handler (...)
4188 CODE:
4189 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1730 4190
1731 hv_store (hv, "desc", sizeof ("desc") - 1, 4191void
1732 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 4192async_pool (SV *cv, ...)
4193 PROTOTYPE: &@
4194 PPCODE:
4195{
4196 HV *hv = (HV *)av_pop (av_async_pool);
4197 AV *av = newAV ();
4198 SV *cb = ST (0);
4199 int i;
1733 4200
1734 invoke_av = (AV *)SvRV (invoke); 4201 av_extend (av, items - 2);
1735 len = av_len (invoke_av); 4202 for (i = 1; i < items; ++i)
4203 av_push (av, SvREFCNT_inc_NN (ST (i)));
1736 4204
1737 sv_setsv (cb, AvARRAY (invoke_av)[0]); 4205 if ((SV *)hv == &PL_sv_undef)
1738
1739 if (len > 0)
1740 { 4206 {
1741 av_fill (defav, len - 1); 4207 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1742 for (i = 0; i < len; ++i) 4208 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1743 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 4209 SvREFCNT_dec_NN (sv);
1744 } 4210 }
1745 4211
4212 {
4213 struct coro *coro = SvSTATE_hv (hv);
4214
4215 assert (!coro->invoke_cb);
4216 assert (!coro->invoke_av);
4217 coro->invoke_cb = SvREFCNT_inc (cb);
4218 coro->invoke_av = av;
4219 }
4220
4221 api_ready (aTHX_ (SV *)hv);
4222
4223 if (GIMME_V != G_VOID)
4224 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4225 else
1746 SvREFCNT_dec (invoke); 4226 SvREFCNT_dec_NN (hv);
1747} 4227}
1748 4228
1749void 4229SV *
1750_pool_2 (SV *cb) 4230rouse_cb ()
4231 PROTOTYPE:
1751 CODE: 4232 CODE:
1752{ 4233 RETVAL = coro_new_rouse_cb (aTHX);
1753 struct coro *coro = SvSTATE (coro_current);
1754
1755 sv_setsv (cb, &PL_sv_undef);
1756
1757 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1758 coro->saved_deffh = 0;
1759
1760 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1761 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1762 croak ("\3terminate\2\n");
1763
1764 av_clear (GvAV (PL_defgv));
1765 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1766 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1767
1768 coro->prio = 0;
1769
1770 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1771 api_trace (coro_current, 0);
1772
1773 av_push (av_async_pool, newSVsv (coro_current));
1774}
1775
1776
1777MODULE = Coro::State PACKAGE = Coro::AIO
1778
1779SV *
1780_get_state ()
1781 CODE:
1782{
1783 struct io_state *data;
1784
1785 RETVAL = newSV (sizeof (struct io_state));
1786 data = (struct io_state *)SvPVX (RETVAL);
1787 SvCUR_set (RETVAL, sizeof (struct io_state));
1788 SvPOK_only (RETVAL);
1789
1790 data->errorno = errno;
1791 data->laststype = PL_laststype;
1792 data->laststatval = PL_laststatval;
1793 data->statcache = PL_statcache;
1794}
1795 OUTPUT: 4234 OUTPUT:
1796 RETVAL 4235 RETVAL
1797 4236
1798void 4237void
1799_set_state (char *data_) 4238rouse_wait (...)
4239 PROTOTYPE: ;$
4240 PPCODE:
4241 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4242
4243void
4244on_enter (SV *block)
4245 ALIAS:
4246 on_leave = 1
1800 PROTOTYPE: $ 4247 PROTOTYPE: &
1801 CODE: 4248 CODE:
1802{ 4249{
1803 struct io_state *data = (void *)data_; 4250 struct coro *coro = SvSTATE_current;
4251 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1804 4252
1805 errno = data->errorno; 4253 block = s_get_cv_croak (block);
1806 PL_laststype = data->laststype;
1807 PL_laststatval = data->laststatval;
1808 PL_statcache = data->statcache;
1809}
1810 4254
4255 if (!*avp)
4256 *avp = newAV ();
4257
4258 av_push (*avp, SvREFCNT_inc (block));
4259
4260 if (!ix)
4261 on_enterleave_call (aTHX_ block);
4262
4263 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4264 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4265 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4266}
4267
4268
4269MODULE = Coro::State PACKAGE = PerlIO::cede
4270
4271BOOT:
4272 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4273
4274
4275MODULE = Coro::State PACKAGE = Coro::Semaphore
4276
4277SV *
4278new (SV *klass, SV *count = 0)
4279 CODE:
4280{
4281 int semcnt = 1;
4282
4283 if (count)
4284 {
4285 SvGETMAGIC (count);
4286
4287 if (SvOK (count))
4288 semcnt = SvIV (count);
4289 }
4290
4291 RETVAL = sv_bless (
4292 coro_waitarray_new (aTHX_ semcnt),
4293 GvSTASH (CvGV (cv))
4294 );
4295}
4296 OUTPUT:
4297 RETVAL
4298
4299# helper for Coro::Channel and others
4300SV *
4301_alloc (int count)
4302 CODE:
4303 RETVAL = coro_waitarray_new (aTHX_ count);
4304 OUTPUT:
4305 RETVAL
4306
4307SV *
4308count (SV *self)
4309 CODE:
4310 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4311 OUTPUT:
4312 RETVAL
4313
4314void
4315up (SV *self)
4316 CODE:
4317 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4318
4319void
4320adjust (SV *self, int adjust)
4321 CODE:
4322 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4323
4324void
4325down (...)
4326 CODE:
4327 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4328
4329void
4330wait (...)
4331 CODE:
4332 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4333
4334void
4335try (SV *self)
4336 PPCODE:
4337{
4338 AV *av = (AV *)SvRV (self);
4339 SV *count_sv = AvARRAY (av)[0];
4340 IV count = SvIVX (count_sv);
4341
4342 if (count > 0)
4343 {
4344 --count;
4345 SvIVX (count_sv) = count;
4346 XSRETURN_YES;
4347 }
4348 else
4349 XSRETURN_NO;
4350}
4351
4352void
4353waiters (SV *self)
4354 PPCODE:
4355{
4356 AV *av = (AV *)SvRV (self);
4357 int wcount = AvFILLp (av) + 1 - 1;
4358
4359 if (GIMME_V == G_SCALAR)
4360 XPUSHs (sv_2mortal (newSViv (wcount)));
4361 else
4362 {
4363 int i;
4364 EXTEND (SP, wcount);
4365 for (i = 1; i <= wcount; ++i)
4366 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4367 }
4368}
4369
4370MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4371
4372void
4373_may_delete (SV *sem, int count, unsigned int extra_refs)
4374 PPCODE:
4375{
4376 AV *av = (AV *)SvRV (sem);
4377
4378 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4379 && AvFILLp (av) == 0 /* no waiters, just count */
4380 && SvIV (AvARRAY (av)[0]) == count)
4381 XSRETURN_YES;
4382
4383 XSRETURN_NO;
4384}
4385
4386MODULE = Coro::State PACKAGE = Coro::Signal
4387
4388SV *
4389new (SV *klass)
4390 CODE:
4391 RETVAL = sv_bless (
4392 coro_waitarray_new (aTHX_ 0),
4393 GvSTASH (CvGV (cv))
4394 );
4395 OUTPUT:
4396 RETVAL
4397
4398void
4399wait (...)
4400 CODE:
4401 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4402
4403void
4404broadcast (SV *self)
4405 CODE:
4406{
4407 AV *av = (AV *)SvRV (self);
4408 coro_signal_wake (aTHX_ av, AvFILLp (av));
4409}
4410
4411void
4412send (SV *self)
4413 CODE:
4414{
4415 AV *av = (AV *)SvRV (self);
4416
4417 if (AvFILLp (av))
4418 coro_signal_wake (aTHX_ av, 1);
4419 else
4420 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4421}
4422
4423IV
4424awaited (SV *self)
4425 CODE:
4426 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4427 OUTPUT:
4428 RETVAL
4429
4430
4431MODULE = Coro::State PACKAGE = Coro::AnyEvent
4432
4433BOOT:
4434 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4435
4436void
4437_schedule (...)
4438 CODE:
4439{
4440 static int incede;
4441
4442 api_cede_notself (aTHX);
4443
4444 ++incede;
4445 while (coro_nready >= incede && api_cede (aTHX))
4446 ;
4447
4448 sv_setsv (sv_activity, &PL_sv_undef);
4449 if (coro_nready >= incede)
4450 {
4451 PUSHMARK (SP);
4452 PUTBACK;
4453 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4454 }
4455
4456 --incede;
4457}
4458
4459
4460MODULE = Coro::State PACKAGE = Coro::AIO
4461
4462void
4463_register (char *target, char *proto, SV *req)
4464 CODE:
4465{
4466 SV *req_cv = s_get_cv_croak (req);
4467 /* newXSproto doesn't return the CV on 5.8 */
4468 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4469 sv_setpv ((SV *)slf_cv, proto);
4470 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4471}
4472
4473MODULE = Coro::State PACKAGE = Coro::Select
4474
4475void
4476patch_pp_sselect ()
4477 CODE:
4478 if (!coro_old_pp_sselect)
4479 {
4480 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4481 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4482 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4483 }
4484
4485void
4486unpatch_pp_sselect ()
4487 CODE:
4488 if (coro_old_pp_sselect)
4489 {
4490 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4491 coro_old_pp_sselect = 0;
4492 }
4493
4494MODULE = Coro::State PACKAGE = Coro::Util
4495
4496void
4497_exit (int code)
4498 CODE:
4499 _exit (code);
4500
4501NV
4502time ()
4503 CODE:
4504 RETVAL = nvtime (aTHX);
4505 OUTPUT:
4506 RETVAL
4507
4508NV
4509gettimeofday ()
4510 PPCODE:
4511{
4512 UV tv [2];
4513 u2time (aTHX_ tv);
4514 EXTEND (SP, 2);
4515 PUSHs (sv_2mortal (newSVuv (tv [0])));
4516 PUSHs (sv_2mortal (newSVuv (tv [1])));
4517}
4518

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines