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Comparing Coro/Coro/State.xs (file contents):
Revision 1.254 by root, Fri Nov 7 20:27:47 2008 UTC vs.
Revision 1.269 by root, Fri Nov 14 06:50:11 2008 UTC

… …
46# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
47#endif 47#endif
48 48
49#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif 51#endif
55 52
56/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
57static int cctx_max_idle = 4; 54static int cctx_max_idle = 4;
58 55
… …
119# define CORO_PREFER_PERL_FUNCTIONS 0 116# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif 117#endif
121 118
122/* The next macros try to return the current stack pointer, in an as 119/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */ 120 * portable way as possible. */
124#define dSTACKLEVEL volatile char stacklevel 121#if __GNUC__ >= 4
125#define STACKLEVEL ((void *)&stacklevel) 122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
126 126
127#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128 128
129#if __GNUC__ >= 3 129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
131# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value)) 131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
133#else 133#else
134# define attribute(x) 134# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr) 135# define expect(expr,value) (expr)
136# define INLINE static
137#endif 137#endif
138 138
139#define expect_false(expr) expect ((expr) != 0, 0) 139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1) 140#define expect_true(expr) expect ((expr) != 0, 1)
141 141
142#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
143 143
144#include "CoroAPI.h" 144#include "CoroAPI.h"
145 145
146#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
147
147static perl_mutex coro_lock; 148static perl_mutex coro_lock;
148# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0) 149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
149# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0) 150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
153# endif
154
150#else 155#else
156
151# define LOCK (void)0 157# define LOCK (void)0
152# define UNLOCK (void)0 158# define UNLOCK (void)0
159
153#endif 160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
154 166
155/* helper storage struct for Coro::AIO */ 167/* helper storage struct for Coro::AIO */
156struct io_state 168struct io_state
157{ 169{
158 AV *res; 170 AV *res;
159 int errorno; 171 int errorno;
160 I32 laststype; 172 I32 laststype; /* U16 in 5.10.0 */
161 int laststatval; 173 int laststatval;
162 Stat_t statcache; 174 Stat_t statcache;
163}; 175};
164 176
165static double (*nvtime)(); /* so why doesn't it take void? */ 177static double (*nvtime)(); /* so why doesn't it take void? */
… …
169static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
170static AV *main_mainstack; /* used to differentiate between $main and others */ 182static AV *main_mainstack; /* used to differentiate between $main and others */
171static JMPENV *main_top_env; 183static JMPENV *main_top_env;
172static HV *coro_state_stash, *coro_stash; 184static HV *coro_state_stash, *coro_stash;
173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */ 185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
187
188struct transfer_args
189{
190 struct coro *prev, *next;
191};
174 192
175static GV *irsgv; /* $/ */ 193static GV *irsgv; /* $/ */
176static GV *stdoutgv; /* *STDOUT */ 194static GV *stdoutgv; /* *STDOUT */
177static SV *rv_diehook; 195static SV *rv_diehook;
178static SV *rv_warnhook; 196static SV *rv_warnhook;
… …
280#define PRIO_MIN -4 298#define PRIO_MIN -4
281 299
282/* for Coro.pm */ 300/* for Coro.pm */
283static SV *coro_current; 301static SV *coro_current;
284static SV *coro_readyhook; 302static SV *coro_readyhook;
285static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
286static int coro_nready; 304static int coro_nready;
287static struct coro *coro_first; 305static struct coro *coro_first;
288 306
289/** lowlevel stuff **********************************************************/ 307/** lowlevel stuff **********************************************************/
290 308
… …
395 : 0 413 : 0
396 414
397#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
398#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state) 416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
399 417
400static struct coro * 418INLINE struct coro *
401SvSTATE_ (pTHX_ SV *coro) 419SvSTATE_ (pTHX_ SV *coro)
402{ 420{
403 HV *stash; 421 HV *stash;
404 MAGIC *mg; 422 MAGIC *mg;
405 423
… …
696 } 714 }
697 715
698 return rss; 716 return rss;
699} 717}
700 718
719/** set stacklevel support **************************************************/
720
721/* we sometimes need to create the effect of pp_slf calling us */
722#define SLF_HEAD (void)0
723/* we sometimes need to create the effect of leaving via pp_slf */
724#define SLF_TAIL slf_tail (aTHX)
725
726INLINE void
727slf_tail (pTHX)
728{
729 dSP;
730 SV **bot = SP;
731
732 int gimme = GIMME_V;
733
734 /* make sure we put something on the stack in scalar context */
735 if (gimme == G_SCALAR)
736 {
737 if (sp == bot)
738 XPUSHs (&PL_sv_undef);
739
740 SP = bot + 1;
741 }
742
743 PUTBACK;
744}
745
701/** coroutine stack handling ************************************************/ 746/** coroutine stack handling ************************************************/
702 747
703static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 748static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
704static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); 749static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
705static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg); 750static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
… …
822 PL_rs = newSVsv (GvSV (irsgv)); 867 PL_rs = newSVsv (GvSV (irsgv));
823 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
824 869
825 { 870 {
826 dSP; 871 dSP;
827 LOGOP myop; 872 UNOP myop;
828 873
829 Zero (&myop, 1, LOGOP); 874 Zero (&myop, 1, UNOP);
830 myop.op_next = Nullop; 875 myop.op_next = Nullop;
831 myop.op_flags = OPf_WANT_VOID; 876 myop.op_flags = OPf_WANT_VOID;
832 877
833 PUSHMARK (SP); 878 PUSHMARK (SP);
834 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 879 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
… …
837 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 882 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
838 SPAGAIN; 883 SPAGAIN;
839 } 884 }
840 885
841 /* this newly created coroutine might be run on an existing cctx which most 886 /* this newly created coroutine might be run on an existing cctx which most
842 * likely was suspended in set_stacklevel, called from entersub. 887 * likely was suspended in set_stacklevel, called from pp_set_stacklevel,
843 * set_stacklevl doesn't do anything on return, but entersub does LEAVE, 888 * so we have to emulate entering pp_set_stacklevel here.
844 * so we ENTER here for symmetry
845 */ 889 */
846 ENTER; 890 SLF_HEAD;
847} 891}
848 892
849static void 893static void
850coro_destruct (pTHX_ struct coro *coro) 894coro_destruct (pTHX_ struct coro *coro)
851{ 895{
… …
880 SvREFCNT_dec (coro->throw); 924 SvREFCNT_dec (coro->throw);
881 925
882 coro_destruct_stacks (aTHX); 926 coro_destruct_stacks (aTHX);
883} 927}
884 928
885static void 929INLINE void
886free_coro_mortal (pTHX) 930free_coro_mortal (pTHX)
887{ 931{
888 if (expect_true (coro_mortal)) 932 if (expect_true (coro_mortal))
889 { 933 {
890 SvREFCNT_dec (coro_mortal); 934 SvREFCNT_dec (coro_mortal);
… …
1014 1058
1015 TAINT_NOT; 1059 TAINT_NOT;
1016 return 0; 1060 return 0;
1017} 1061}
1018 1062
1063static void
1064prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1065{
1066 ta->prev = (struct coro *)cctx;
1067 ta->next = 0;
1068}
1069
1019/* inject a fake call to Coro::State::_cctx_init into the execution */ 1070/* inject a fake call to Coro::State::_cctx_init into the execution */
1020/* _cctx_init should be careful, as it could be called at almost any time */ 1071/* _cctx_init should be careful, as it could be called at almost any time */
1021/* during execution of a perl program */ 1072/* during execution of a perl program */
1073/* also initialises PL_top_env */
1022static void NOINLINE 1074static void NOINLINE
1023cctx_prepare (pTHX_ coro_cctx *cctx) 1075cctx_prepare (pTHX_ coro_cctx *cctx)
1024{ 1076{
1025 dSP; 1077 dSP;
1026 LOGOP myop; 1078 UNOP myop;
1027 1079
1028 PL_top_env = &PL_start_env; 1080 PL_top_env = &PL_start_env;
1029 1081
1030 if (cctx->flags & CC_TRACE) 1082 if (cctx->flags & CC_TRACE)
1031 PL_runops = runops_trace; 1083 PL_runops = runops_trace;
1032 1084
1033 Zero (&myop, 1, LOGOP); 1085 Zero (&myop, 1, UNOP);
1034 myop.op_next = PL_op; 1086 myop.op_next = PL_op;
1035 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1087 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1036 1088
1037 PUSHMARK (SP); 1089 PUSHMARK (SP);
1038 EXTEND (SP, 2); 1090 EXTEND (SP, 2);
1039 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1091 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1040 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1092 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1041 PUTBACK; 1093 PUTBACK;
1042 PL_op = (OP *)&myop; 1094 PL_op = (OP *)&myop;
1043 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1095 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1044 SPAGAIN; 1096 SPAGAIN;
1045} 1097}
1046 1098
1099/* the tail of transfer: execute stuff we can only do after a transfer */
1100INLINE void
1101transfer_tail (pTHX)
1102{
1103 struct coro *next = (struct coro *)transfer_next;
1104 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1105 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1106
1107 free_coro_mortal (aTHX);
1108 UNLOCK;
1109
1110 if (expect_false (next->throw))
1111 {
1112 SV *exception = sv_2mortal (next->throw);
1113
1114 next->throw = 0;
1115 sv_setsv (ERRSV, exception);
1116 croak (0);
1117 }
1118}
1119
1047/* 1120/*
1048 * this is a _very_ stripped down perl interpreter ;) 1121 * this is a _very_ stripped down perl interpreter ;)
1049 */ 1122 */
1050static void 1123static void
1051cctx_run (void *arg) 1124cctx_run (void *arg)
1052{ 1125{
1126#ifdef USE_ITHREADS
1127# if CORO_PTHREAD
1128 PERL_SET_CONTEXT (coro_thx);
1129# endif
1130#endif
1131 {
1053 dTHX; 1132 dTHX;
1054 1133
1055 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1134 /* we are the alternative tail to pp_set_stacklevel */
1056 UNLOCK; 1135 /* so do the same things here */
1136 SLF_TAIL;
1057 1137
1058 /* we now skip the entersub that lead to transfer() */ 1138 /* we now skip the op that did lead to transfer() */
1059 PL_op = PL_op->op_next; 1139 PL_op = PL_op->op_next;
1060 1140
1061 /* inject a fake subroutine call to cctx_init */ 1141 /* inject a fake subroutine call to cctx_init */
1062 cctx_prepare (aTHX_ (coro_cctx *)arg); 1142 cctx_prepare (aTHX_ (coro_cctx *)arg);
1063 1143
1144 /* cctx_run is the alternative tail of transfer() */
1145 transfer_tail (aTHX);
1146
1064 /* somebody or something will hit me for both perl_run and PL_restartop */ 1147 /* somebody or something will hit me for both perl_run and PL_restartop */
1065 PL_restartop = PL_op; 1148 PL_restartop = PL_op;
1066 perl_run (PL_curinterp); 1149 perl_run (PL_curinterp);
1067 1150
1068 /* 1151 /*
1069 * If perl-run returns we assume exit() was being called or the coro 1152 * If perl-run returns we assume exit() was being called or the coro
1070 * fell off the end, which seems to be the only valid (non-bug) 1153 * fell off the end, which seems to be the only valid (non-bug)
1071 * reason for perl_run to return. We try to exit by jumping to the 1154 * reason for perl_run to return. We try to exit by jumping to the
1072 * bootstrap-time "top" top_env, as we cannot restore the "main" 1155 * bootstrap-time "top" top_env, as we cannot restore the "main"
1073 * coroutine as Coro has no such concept 1156 * coroutine as Coro has no such concept
1074 */ 1157 */
1075 PL_top_env = main_top_env; 1158 PL_top_env = main_top_env;
1076 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1159 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1160 }
1077} 1161}
1078 1162
1079static coro_cctx * 1163static coro_cctx *
1080cctx_new () 1164cctx_new ()
1081{ 1165{
1082 coro_cctx *cctx; 1166 coro_cctx *cctx;
1167
1168 ++cctx_count;
1169 New (0, cctx, 1, coro_cctx);
1170
1171 cctx->gen = cctx_gen;
1172 cctx->flags = 0;
1173 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx only suitable as source */
1179static coro_cctx *
1180cctx_new_empty ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183
1184 cctx->sptr = 0;
1185 coro_create (&cctx->cctx, 0, 0, 0, 0);
1186
1187 return cctx;
1188}
1189
1190/* create a new cctx suitable as destination/running a perl interpreter */
1191static coro_cctx *
1192cctx_new_run ()
1193{
1194 coro_cctx *cctx = cctx_new ();
1083 void *stack_start; 1195 void *stack_start;
1084 size_t stack_size; 1196 size_t stack_size;
1085
1086 ++cctx_count;
1087 Newz (0, cctx, 1, coro_cctx);
1088
1089 cctx->gen = cctx_gen;
1090 1197
1091#if HAVE_MMAP 1198#if HAVE_MMAP
1092 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1199 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1093 /* mmap supposedly does allocate-on-write for us */ 1200 /* mmap supposedly does allocate-on-write for us */
1094 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1201 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1095 1202
1096 if (cctx->sptr != (void *)-1) 1203 if (cctx->sptr != (void *)-1)
1097 { 1204 {
1098# if CORO_STACKGUARD 1205 #if CORO_STACKGUARD
1099 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1206 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1100# endif 1207 #endif
1101 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1208 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1102 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1209 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1103 cctx->flags |= CC_MAPPED; 1210 cctx->flags |= CC_MAPPED;
1104 } 1211 }
1105 else 1212 else
1106#endif 1213#endif
1107 { 1214 {
1108 cctx->ssize = cctx_stacksize * (long)sizeof (long); 1215 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1109 New (0, cctx->sptr, cctx_stacksize, long); 1216 New (0, cctx->sptr, cctx_stacksize, long);
1110 1217
1111 if (!cctx->sptr) 1218 if (!cctx->sptr)
1112 { 1219 {
1113 perror ("FATAL: unable to allocate stack for coroutine"); 1220 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1114 _exit (EXIT_FAILURE); 1221 _exit (EXIT_FAILURE);
1115 } 1222 }
1116 1223
1117 stack_start = cctx->sptr; 1224 stack_start = cctx->sptr;
1118 stack_size = cctx->ssize; 1225 stack_size = cctx->ssize;
1119 } 1226 }
1120 1227
1121 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1228 #if CORO_USE_VALGRIND
1229 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1230 #endif
1231
1122 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1232 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1123 1233
1124 return cctx; 1234 return cctx;
1125} 1235}
1126 1236
… …
1134 coro_destroy (&cctx->cctx); 1244 coro_destroy (&cctx->cctx);
1135 1245
1136 /* coro_transfer creates new, empty cctx's */ 1246 /* coro_transfer creates new, empty cctx's */
1137 if (cctx->sptr) 1247 if (cctx->sptr)
1138 { 1248 {
1139#if CORO_USE_VALGRIND 1249 #if CORO_USE_VALGRIND
1140 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1250 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1141#endif 1251 #endif
1142 1252
1143#if HAVE_MMAP 1253#if HAVE_MMAP
1144 if (cctx->flags & CC_MAPPED) 1254 if (cctx->flags & CC_MAPPED)
1145 munmap (cctx->sptr, cctx->ssize); 1255 munmap (cctx->sptr, cctx->ssize);
1146 else 1256 else
… …
1167 return cctx; 1277 return cctx;
1168 1278
1169 cctx_destroy (cctx); 1279 cctx_destroy (cctx);
1170 } 1280 }
1171 1281
1172 return cctx_new (); 1282 return cctx_new_run ();
1173} 1283}
1174 1284
1175static void 1285static void
1176cctx_put (coro_cctx *cctx) 1286cctx_put (coro_cctx *cctx)
1177{ 1287{
1178 assert (("cctx_put called on non-initialised cctx", cctx->sptr)); 1288 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1179 1289
1180 /* free another cctx if overlimit */ 1290 /* free another cctx if overlimit */
1181 if (expect_false (cctx_idle >= cctx_max_idle)) 1291 if (expect_false (cctx_idle >= cctx_max_idle))
1182 { 1292 {
1183 coro_cctx *first = cctx_first; 1293 coro_cctx *first = cctx_first;
… …
1222 dSTACKLEVEL; 1332 dSTACKLEVEL;
1223 1333
1224 /* sometimes transfer is only called to set idle_sp */ 1334 /* sometimes transfer is only called to set idle_sp */
1225 if (expect_false (!next)) 1335 if (expect_false (!next))
1226 { 1336 {
1227 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1337 ((coro_cctx *)prev)->idle_sp = stacklevel;
1228 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1338 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1229 } 1339 }
1230 else if (expect_true (prev != next)) 1340 else if (expect_true (prev != next))
1231 { 1341 {
1232 static volatile int has_throw;
1233 coro_cctx *prev__cctx; 1342 coro_cctx *prev__cctx;
1234 1343
1235 if (expect_false (prev->flags & CF_NEW)) 1344 if (expect_false (prev->flags & CF_NEW))
1236 { 1345 {
1237 /* create a new empty/source context */ 1346 /* create a new empty/source context */
1238 ++cctx_count; 1347 prev->cctx = cctx_new_empty ();
1239 New (0, prev->cctx, 1, coro_cctx);
1240 prev->cctx->sptr = 0;
1241 coro_create (&prev->cctx->cctx, 0, 0, 0, 0);
1242
1243 prev->flags &= ~CF_NEW; 1348 prev->flags &= ~CF_NEW;
1244 prev->flags |= CF_RUNNING; 1349 prev->flags |= CF_RUNNING;
1245 } 1350 }
1246 1351
1247 prev->flags &= ~CF_RUNNING; 1352 prev->flags &= ~CF_RUNNING;
… …
1262 else 1367 else
1263 load_perl (aTHX_ next); 1368 load_perl (aTHX_ next);
1264 1369
1265 prev__cctx = prev->cctx; 1370 prev__cctx = prev->cctx;
1266 1371
1267 /* possibly "free" the cctx */ 1372 /* possibly untie and reuse the cctx */
1268 if (expect_true ( 1373 if (expect_true (
1269 prev__cctx->idle_sp == STACKLEVEL 1374 prev__cctx->idle_sp == stacklevel
1270 && !(prev__cctx->flags & CC_TRACE) 1375 && !(prev__cctx->flags & CC_TRACE)
1271 && !force_cctx 1376 && !force_cctx
1272 )) 1377 ))
1273 { 1378 {
1274 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1379 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1275 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1380 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1276 1381
1277 prev->cctx = 0; 1382 prev->cctx = 0;
1278 1383
1279 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1384 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1280 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1385 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1288 ++next->usecount; 1393 ++next->usecount;
1289 1394
1290 if (expect_true (!next->cctx)) 1395 if (expect_true (!next->cctx))
1291 next->cctx = cctx_get (aTHX); 1396 next->cctx = cctx_get (aTHX);
1292 1397
1293 has_throw = !!next->throw; 1398 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1399 transfer_next = next;
1294 1400
1295 if (expect_false (prev__cctx != next->cctx)) 1401 if (expect_false (prev__cctx != next->cctx))
1296 { 1402 {
1297 prev__cctx->top_env = PL_top_env; 1403 prev__cctx->top_env = PL_top_env;
1298 PL_top_env = next->cctx->top_env; 1404 PL_top_env = next->cctx->top_env;
1299 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1300 } 1406 }
1301 1407
1302 free_coro_mortal (aTHX); 1408 transfer_tail (aTHX);
1303 UNLOCK;
1304
1305 if (expect_false (has_throw))
1306 {
1307 struct coro *coro = SvSTATE (coro_current);
1308
1309 if (coro->throw)
1310 {
1311 SV *exception = coro->throw;
1312 coro->throw = 0;
1313 sv_setsv (ERRSV, exception);
1314 croak (0);
1315 }
1316 }
1317 } 1409 }
1318} 1410}
1319
1320struct transfer_args
1321{
1322 struct coro *prev, *next;
1323};
1324 1411
1325#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1412#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1326#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1413#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1327 1414
1328/** high level stuff ********************************************************/ 1415/** high level stuff ********************************************************/
… …
1501 1588
1502static int 1589static int
1503api_is_ready (SV *coro_sv) 1590api_is_ready (SV *coro_sv)
1504{ 1591{
1505 dTHX; 1592 dTHX;
1593
1506 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1594 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1507} 1595}
1508 1596
1509static void 1597INLINE void
1510prepare_schedule (pTHX_ struct transfer_args *ta) 1598prepare_schedule (pTHX_ struct transfer_args *ta)
1511{ 1599{
1512 SV *prev_sv, *next_sv; 1600 SV *prev_sv, *next_sv;
1513 1601
1514 for (;;) 1602 for (;;)
… …
1540 /* cannot transfer to destroyed coros, skip and look for next */ 1628 /* cannot transfer to destroyed coros, skip and look for next */
1541 if (expect_false (ta->next->flags & CF_DESTROYED)) 1629 if (expect_false (ta->next->flags & CF_DESTROYED))
1542 { 1630 {
1543 UNLOCK; 1631 UNLOCK;
1544 SvREFCNT_dec (next_sv); 1632 SvREFCNT_dec (next_sv);
1545 /* coro_nready is already taken care of by destroy */ 1633 /* coro_nready has already been taken care of by destroy */
1546 continue; 1634 continue;
1547 } 1635 }
1548 1636
1549 --coro_nready; 1637 --coro_nready;
1550 UNLOCK; 1638 UNLOCK;
… …
1553 1641
1554 /* free this only after the transfer */ 1642 /* free this only after the transfer */
1555 prev_sv = SvRV (coro_current); 1643 prev_sv = SvRV (coro_current);
1556 ta->prev = SvSTATE (prev_sv); 1644 ta->prev = SvSTATE (prev_sv);
1557 TRANSFER_CHECK (*ta); 1645 TRANSFER_CHECK (*ta);
1558 assert (ta->next->flags & CF_READY); 1646 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1559 ta->next->flags &= ~CF_READY; 1647 ta->next->flags &= ~CF_READY;
1560 SvRV_set (coro_current, next_sv); 1648 SvRV_set (coro_current, next_sv);
1561 1649
1562 LOCK; 1650 LOCK;
1563 free_coro_mortal (aTHX); 1651 free_coro_mortal (aTHX);
1564 coro_mortal = prev_sv; 1652 coro_mortal = prev_sv;
1565 UNLOCK; 1653 UNLOCK;
1566} 1654}
1567 1655
1568static void 1656INLINE void
1569prepare_cede (pTHX_ struct transfer_args *ta) 1657prepare_cede (pTHX_ struct transfer_args *ta)
1570{ 1658{
1571 api_ready (coro_current); 1659 api_ready (coro_current);
1572 prepare_schedule (aTHX_ ta); 1660 prepare_schedule (aTHX_ ta);
1573} 1661}
1574 1662
1575static int 1663static void
1576prepare_cede_notself (pTHX_ struct transfer_args *ta) 1664prepare_cede_notself (pTHX_ struct transfer_args *ta)
1577{ 1665{
1666 SV *prev = SvRV (coro_current);
1667
1578 if (coro_nready) 1668 if (coro_nready)
1579 { 1669 {
1580 SV *prev = SvRV (coro_current);
1581 prepare_schedule (aTHX_ ta); 1670 prepare_schedule (aTHX_ ta);
1582 api_ready (prev); 1671 api_ready (prev);
1672 }
1673 else
1674 ta->prev = ta->next = SvSTATE (prev);
1675}
1676
1677static void
1678api_schedule (void)
1679{
1680 dTHX;
1681 struct transfer_args ta;
1682
1683 prepare_schedule (aTHX_ &ta);
1684 TRANSFER (ta, 1);
1685}
1686
1687static int
1688api_cede (void)
1689{
1690 dTHX;
1691 struct transfer_args ta;
1692
1693 prepare_cede (aTHX_ &ta);
1694
1695 if (expect_true (ta.prev != ta.next))
1696 {
1697 TRANSFER (ta, 1);
1583 return 1; 1698 return 1;
1584 } 1699 }
1585 else 1700 else
1586 return 0; 1701 return 0;
1587} 1702}
1588 1703
1589static void
1590api_schedule (void)
1591{
1592 dTHX;
1593 struct transfer_args ta;
1594
1595 prepare_schedule (aTHX_ &ta);
1596 TRANSFER (ta, 1);
1597}
1598
1599static int 1704static int
1600api_cede (void) 1705api_cede_notself (void)
1601{ 1706{
1707 if (coro_nready)
1708 {
1602 dTHX; 1709 dTHX;
1603 struct transfer_args ta; 1710 struct transfer_args ta;
1604 1711
1605 prepare_cede (aTHX_ &ta); 1712 prepare_cede_notself (aTHX_ &ta);
1606
1607 if (expect_true (ta.prev != ta.next))
1608 {
1609 TRANSFER (ta, 1); 1713 TRANSFER (ta, 1);
1610 return 1; 1714 return 1;
1611 } 1715 }
1612 else 1716 else
1613 return 0; 1717 return 0;
1614} 1718}
1615 1719
1616static int
1617api_cede_notself (void)
1618{
1619 dTHX;
1620 struct transfer_args ta;
1621
1622 if (prepare_cede_notself (aTHX_ &ta))
1623 {
1624 TRANSFER (ta, 1);
1625 return 1;
1626 }
1627 else
1628 return 0;
1629}
1630
1631static void 1720static void
1632api_trace (SV *coro_sv, int flags) 1721api_trace (SV *coro_sv, int flags)
1633{ 1722{
1634 dTHX; 1723 dTHX;
1635 struct coro *coro = SvSTATE (coro_sv); 1724 struct coro *coro = SvSTATE (coro_sv);
1636 1725
1637 if (flags & CC_TRACE) 1726 if (flags & CC_TRACE)
1638 { 1727 {
1639 if (!coro->cctx) 1728 if (!coro->cctx)
1640 coro->cctx = cctx_new (); 1729 coro->cctx = cctx_new_run ();
1641 else if (!(coro->cctx->flags & CC_TRACE)) 1730 else if (!(coro->cctx->flags & CC_TRACE))
1642 croak ("cannot enable tracing on coroutine with custom stack"); 1731 croak ("cannot enable tracing on coroutine with custom stack");
1643 1732
1644 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1733 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1645 } 1734 }
… …
1652 else 1741 else
1653 coro->slot->runops = RUNOPS_DEFAULT; 1742 coro->slot->runops = RUNOPS_DEFAULT;
1654 } 1743 }
1655} 1744}
1656 1745
1746#if 0
1657static int 1747static int
1658coro_gensub_free (pTHX_ SV *sv, MAGIC *mg) 1748coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1659{ 1749{
1660 AV *padlist; 1750 AV *padlist;
1661 AV *av = (AV *)mg->mg_obj; 1751 AV *av = (AV *)mg->mg_obj;
… …
1667 1757
1668static MGVTBL coro_gensub_vtbl = { 1758static MGVTBL coro_gensub_vtbl = {
1669 0, 0, 0, 0, 1759 0, 0, 0, 0,
1670 coro_gensub_free 1760 coro_gensub_free
1671}; 1761};
1762#endif
1672 1763
1673/*****************************************************************************/ 1764/*****************************************************************************/
1674/* PerlIO::cede */ 1765/* PerlIO::cede */
1675 1766
1676typedef struct 1767typedef struct
… …
1743 PerlIOBuf_get_ptr, 1834 PerlIOBuf_get_ptr,
1744 PerlIOBuf_get_cnt, 1835 PerlIOBuf_get_cnt,
1745 PerlIOBuf_set_ptrcnt, 1836 PerlIOBuf_set_ptrcnt,
1746}; 1837};
1747 1838
1839/*****************************************************************************/
1840
1841static const CV *slf_cv; /* for quick consistency check */
1842
1843static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1844static SV *slf_arg0;
1845static SV *slf_arg1;
1846
1847/* this restores the stack in the case we patched the entersub, to */
1848/* recreate the stack frame as perl will on following calls */
1849/* since entersub cleared the stack */
1850static OP *
1851pp_restore (pTHX)
1852{
1853 dSP;
1854
1855 PUSHMARK (SP);
1856
1857 EXTEND (SP, 3);
1858 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1859 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1860 PUSHs ((SV *)CvGV (slf_cv));
1861
1862 RETURNOP (slf_restore.op_first);
1863}
1864
1865#define OPpENTERSUB_SLF 15 /* the part of op_private entersub hopefully doesn't use */
1866
1867/* declare prototype */
1868XS(XS_Coro__State__set_stacklevel);
1869
1870/*
1871 * these not obviously related functions are all rolled into one
1872 * function to increase chances that they all will call transfer with the same
1873 * stack offset
1874 * SLF stands for "schedule-like-function".
1875 */
1876static OP *
1877pp_slf (pTHX)
1878{
1879 dSP;
1880 struct transfer_args ta;
1881 SV **arg = PL_stack_base + TOPMARK + 1;
1882 int items = SP - arg; /* args without function object */
1883
1884 /* do a quick consistency check on the "function" object, and if it isn't */
1885 /* for us, divert to the real entersub */
1886 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1887 return PL_ppaddr[OP_ENTERSUB](aTHX);
1888
1889 /* pop args */
1890 SP = PL_stack_base + POPMARK;
1891
1892 if (!(PL_op->op_flags & OPf_STACKED))
1893 {
1894 /* ampersand-form of call, use @_ instead of stack */
1895 AV *av = GvAV (PL_defgv);
1896 arg = AvARRAY (av);
1897 items = AvFILLp (av) + 1;
1898 }
1899
1900 PUTBACK;
1901 switch (PL_op->op_private & OPpENTERSUB_SLF)
1902 {
1903 case 0:
1904 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1905 break;
1906
1907 case 1:
1908 if (items != 2)
1909 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1910
1911 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1912 break;
1913
1914 case 2:
1915 prepare_schedule (aTHX_ &ta);
1916 break;
1917
1918 case 3:
1919 prepare_cede (aTHX_ &ta);
1920 break;
1921
1922 case 4:
1923 prepare_cede_notself (aTHX_ &ta);
1924 break;
1925
1926 case 5:
1927 abort ();
1928
1929 default:
1930 abort ();
1931 }
1932
1933 TRANSFER (ta, 0);
1934 SPAGAIN;
1935
1936 PUTBACK;
1937 SLF_TAIL;
1938 SPAGAIN;
1939 RETURN;
1940}
1941
1942static void
1943coro_slf_patch (pTHX_ CV *cv, int ix, SV **args, int items)
1944{
1945 assert (("FATAL: SLF call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_slf));
1946
1947 assert (("FATAL: SLF call with illegal CV value", CvGV (cv)));
1948 slf_cv = cv;
1949
1950 /* we patch the op, and then re-run the whole call */
1951 /* we have to put the same argument on the stack for this to work */
1952 /* and this will be done by pp_restore */
1953 slf_restore.op_next = (OP *)&slf_restore;
1954 slf_restore.op_type = OP_NULL;
1955 slf_restore.op_ppaddr = pp_restore;
1956 slf_restore.op_first = PL_op;
1957
1958 slf_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;
1959 slf_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
1960
1961 PL_op->op_ppaddr = pp_slf;
1962 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SLF | ix; /* we potentially share our private flags with entersub */
1963
1964 PL_op = (OP *)&slf_restore;
1965}
1748 1966
1749MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 1967MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1750 1968
1751PROTOTYPES: DISABLE 1969PROTOTYPES: DISABLE
1752 1970
1753BOOT: 1971BOOT:
1754{ 1972{
1755#ifdef USE_ITHREADS 1973#ifdef USE_ITHREADS
1756 MUTEX_INIT (&coro_lock); 1974 MUTEX_INIT (&coro_lock);
1975# if CORO_PTHREAD
1976 coro_thx = PERL_GET_CONTEXT;
1977# endif
1757#endif 1978#endif
1758 BOOT_PAGESIZE; 1979 BOOT_PAGESIZE;
1759 1980
1760 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 1981 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1761 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 1982 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
… …
1824 av_push (coro->args, newSVsv (ST (i))); 2045 av_push (coro->args, newSVsv (ST (i)));
1825} 2046}
1826 OUTPUT: 2047 OUTPUT:
1827 RETVAL 2048 RETVAL
1828 2049
1829# these not obviously related functions are all rolled into the same xs
1830# function to increase chances that they all will call transfer with the same
1831# stack offset
1832void 2050void
1833_set_stacklevel (...) 2051_set_stacklevel (...)
1834 ALIAS: 2052 ALIAS:
1835 Coro::State::transfer = 1 2053 Coro::State::transfer = 1
1836 Coro::schedule = 2 2054 Coro::schedule = 2
1837 Coro::cede = 3 2055 Coro::cede = 3
1838 Coro::cede_notself = 4 2056 Coro::cede_notself = 4
1839 CODE: 2057 CODE:
1840{ 2058 coro_slf_patch (aTHX_ cv, ix, &ST (0), items);
1841 struct transfer_args ta;
1842
1843 PUTBACK;
1844 switch (ix)
1845 {
1846 case 0:
1847 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1848 ta.next = 0;
1849 break;
1850
1851 case 1:
1852 if (items != 2)
1853 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1854
1855 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1856 break;
1857
1858 case 2:
1859 prepare_schedule (aTHX_ &ta);
1860 break;
1861
1862 case 3:
1863 prepare_cede (aTHX_ &ta);
1864 break;
1865
1866 case 4:
1867 if (!prepare_cede_notself (aTHX_ &ta))
1868 XSRETURN_EMPTY;
1869
1870 break;
1871 }
1872 SPAGAIN;
1873
1874 BARRIER;
1875 PUTBACK;
1876 TRANSFER (ta, 0);
1877 SPAGAIN; /* might be the sp of a different coroutine now */
1878 /* be extra careful not to ever do anything after TRANSFER */
1879}
1880 2059
1881bool 2060bool
1882_destroy (SV *coro_sv) 2061_destroy (SV *coro_sv)
1883 CODE: 2062 CODE:
1884 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2063 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1994 RETVAL = boolSV (coro->flags & ix); 2173 RETVAL = boolSV (coro->flags & ix);
1995 OUTPUT: 2174 OUTPUT:
1996 RETVAL 2175 RETVAL
1997 2176
1998void 2177void
2178throw (Coro::State self, SV *throw = &PL_sv_undef)
2179 PROTOTYPE: $;$
2180 CODE:
2181 SvREFCNT_dec (self->throw);
2182 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2183
2184void
1999api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2185api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2000 2186
2001SV * 2187SV *
2002has_cctx (Coro::State coro) 2188has_cctx (Coro::State coro)
2003 PROTOTYPE: $ 2189 PROTOTYPE: $
… …
2012 CODE: 2198 CODE:
2013 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2199 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2014 OUTPUT: 2200 OUTPUT:
2015 RETVAL 2201 RETVAL
2016 2202
2017IV 2203UV
2018rss (Coro::State coro) 2204rss (Coro::State coro)
2019 PROTOTYPE: $ 2205 PROTOTYPE: $
2020 ALIAS: 2206 ALIAS:
2021 usecount = 1 2207 usecount = 1
2022 CODE: 2208 CODE:
… …
2074 2260
2075 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2261 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2076 coro_ready[i] = newAV (); 2262 coro_ready[i] = newAV ();
2077 2263
2078 { 2264 {
2079 SV *sv = perl_get_sv ("Coro::API", TRUE); 2265 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2080 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2081 2266
2082 coroapi.schedule = api_schedule; 2267 coroapi.schedule = api_schedule;
2083 coroapi.cede = api_cede; 2268 coroapi.cede = api_cede;
2084 coroapi.cede_notself = api_cede_notself; 2269 coroapi.cede_notself = api_cede_notself;
2085 coroapi.ready = api_ready; 2270 coroapi.ready = api_ready;
… …
2145 CODE: 2330 CODE:
2146 RETVAL = coro_nready; 2331 RETVAL = coro_nready;
2147 OUTPUT: 2332 OUTPUT:
2148 RETVAL 2333 RETVAL
2149 2334
2150void
2151throw (Coro::State self, SV *throw = &PL_sv_undef)
2152 PROTOTYPE: $;$
2153 CODE:
2154 SvREFCNT_dec (self->throw);
2155 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2156
2157# for async_pool speedup 2335# for async_pool speedup
2158void 2336void
2159_pool_1 (SV *cb) 2337_pool_1 (SV *cb)
2160 CODE: 2338 CODE:
2161{ 2339{
… …
2204 sv_setsv (cb, &PL_sv_undef); 2382 sv_setsv (cb, &PL_sv_undef);
2205 2383
2206 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2384 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2207 coro->saved_deffh = 0; 2385 coro->saved_deffh = 0;
2208 2386
2209 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2387 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2210 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2388 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2211 { 2389 {
2212 SV *old = PL_diehook; 2390 SV *old = PL_diehook;
2213 PL_diehook = 0; 2391 PL_diehook = 0;
2214 SvREFCNT_dec (old); 2392 SvREFCNT_dec (old);
… …
2360 2538
2361MODULE = Coro::State PACKAGE = PerlIO::cede 2539MODULE = Coro::State PACKAGE = PerlIO::cede
2362 2540
2363BOOT: 2541BOOT:
2364 PerlIO_define_layer (aTHX_ &PerlIO_cede); 2542 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2543

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