| 1 | #ifdef USE_THREADS |
| 2 | |
| 3 | #ifdef WIN32 |
| 4 | # include <win32thread.h> |
| 5 | #else |
| 6 | |
| 7 | #ifndef DJGPP |
| 8 | /* POSIXish threads */ |
| 9 | #ifdef OLD_PTHREADS_API |
| 10 | # define pthread_mutexattr_init(a) pthread_mutexattr_create(a) |
| 11 | # define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t) |
| 12 | # define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d)) |
| 13 | # define YIELD pthread_yield() |
| 14 | # define DETACH(t) \ |
| 15 | STMT_START { \ |
| 16 | if (pthread_detach(&(t)->self)) { \ |
| 17 | MUTEX_UNLOCK(&(t)->mutex); \ |
| 18 | croak("panic: DETACH"); \ |
| 19 | } \ |
| 20 | } STMT_END |
| 21 | #else |
| 22 | # define pthread_mutexattr_default NULL |
| 23 | # define pthread_condattr_default NULL |
| 24 | #endif /* OLD_PTHREADS_API */ |
| 25 | #endif |
| 26 | #endif |
| 27 | |
| 28 | #ifdef PTHREADS_CREATED_JOINABLE |
| 29 | # define ATTR_JOINABLE PTHREAD_CREATE_JOINABLE |
| 30 | #else |
| 31 | # ifdef PTHREAD_CREATE_UNDETACHED |
| 32 | # define ATTR_JOINABLE PTHREAD_CREATE_UNDETACHED |
| 33 | # else |
| 34 | # define ATTR_JOINABLE PTHREAD_CREATE_JOINABLE |
| 35 | # endif |
| 36 | #endif |
| 37 | |
| 38 | #ifndef YIELD |
| 39 | # ifdef HAS_SCHED_YIELD |
| 40 | # define YIELD sched_yield() |
| 41 | # else |
| 42 | # ifdef HAS_PTHREAD_YIELD |
| 43 | # define YIELD pthread_yield() |
| 44 | # endif |
| 45 | # endif |
| 46 | #endif |
| 47 | |
| 48 | #ifndef MUTEX_INIT |
| 49 | #define MUTEX_INIT(m) \ |
| 50 | STMT_START { \ |
| 51 | if (pthread_mutex_init((m), pthread_mutexattr_default)) \ |
| 52 | croak("panic: MUTEX_INIT"); \ |
| 53 | } STMT_END |
| 54 | #define MUTEX_LOCK(m) \ |
| 55 | STMT_START { \ |
| 56 | if (pthread_mutex_lock((m))) \ |
| 57 | croak("panic: MUTEX_LOCK"); \ |
| 58 | } STMT_END |
| 59 | #define MUTEX_UNLOCK(m) \ |
| 60 | STMT_START { \ |
| 61 | if (pthread_mutex_unlock((m))) \ |
| 62 | croak("panic: MUTEX_UNLOCK"); \ |
| 63 | } STMT_END |
| 64 | #define MUTEX_DESTROY(m) \ |
| 65 | STMT_START { \ |
| 66 | if (pthread_mutex_destroy((m))) \ |
| 67 | croak("panic: MUTEX_DESTROY"); \ |
| 68 | } STMT_END |
| 69 | #endif /* MUTEX_INIT */ |
| 70 | |
| 71 | #ifndef COND_INIT |
| 72 | #define COND_INIT(c) \ |
| 73 | STMT_START { \ |
| 74 | if (pthread_cond_init((c), pthread_condattr_default)) \ |
| 75 | croak("panic: COND_INIT"); \ |
| 76 | } STMT_END |
| 77 | #define COND_SIGNAL(c) \ |
| 78 | STMT_START { \ |
| 79 | if (pthread_cond_signal((c))) \ |
| 80 | croak("panic: COND_SIGNAL"); \ |
| 81 | } STMT_END |
| 82 | #define COND_BROADCAST(c) \ |
| 83 | STMT_START { \ |
| 84 | if (pthread_cond_broadcast((c))) \ |
| 85 | croak("panic: COND_BROADCAST"); \ |
| 86 | } STMT_END |
| 87 | #define COND_WAIT(c, m) \ |
| 88 | STMT_START { \ |
| 89 | if (pthread_cond_wait((c), (m))) \ |
| 90 | croak("panic: COND_WAIT"); \ |
| 91 | } STMT_END |
| 92 | #define COND_DESTROY(c) \ |
| 93 | STMT_START { \ |
| 94 | if (pthread_cond_destroy((c))) \ |
| 95 | croak("panic: COND_DESTROY"); \ |
| 96 | } STMT_END |
| 97 | #endif /* COND_INIT */ |
| 98 | |
| 99 | /* DETACH(t) must only be called while holding t->mutex */ |
| 100 | #ifndef DETACH |
| 101 | #define DETACH(t) \ |
| 102 | STMT_START { \ |
| 103 | if (pthread_detach((t)->self)) { \ |
| 104 | MUTEX_UNLOCK(&(t)->mutex); \ |
| 105 | croak("panic: DETACH"); \ |
| 106 | } \ |
| 107 | } STMT_END |
| 108 | #endif /* DETACH */ |
| 109 | |
| 110 | #ifndef JOIN |
| 111 | #define JOIN(t, avp) \ |
| 112 | STMT_START { \ |
| 113 | if (pthread_join((t)->self, (void**)(avp))) \ |
| 114 | croak("panic: pthread_join"); \ |
| 115 | } STMT_END |
| 116 | #endif /* JOIN */ |
| 117 | |
| 118 | #ifndef SET_THR |
| 119 | #define SET_THR(t) \ |
| 120 | STMT_START { \ |
| 121 | if (pthread_setspecific(thr_key, (void *) (t))) \ |
| 122 | croak("panic: pthread_setspecific"); \ |
| 123 | } STMT_END |
| 124 | #endif /* SET_THR */ |
| 125 | |
| 126 | #ifndef THR |
| 127 | # ifdef OLD_PTHREADS_API |
| 128 | struct perl_thread *getTHR _((void)); |
| 129 | # define THR getTHR() |
| 130 | # else |
| 131 | # define THR ((struct perl_thread *) pthread_getspecific(thr_key)) |
| 132 | # endif /* OLD_PTHREADS_API */ |
| 133 | #endif /* THR */ |
| 134 | |
| 135 | /* |
| 136 | * dTHR is performance-critical. Here, we only do the pthread_get_specific |
| 137 | * if there may be more than one thread in existence, otherwise we get thr |
| 138 | * from thrsv which is cached in the per-interpreter structure. |
| 139 | * Systems with very fast pthread_get_specific (which should be all systems |
| 140 | * but unfortunately isn't) may wish to simplify to "...*thr = THR". |
| 141 | */ |
| 142 | #ifndef dTHR |
| 143 | # define dTHR \ |
| 144 | struct perl_thread *thr = threadnum? THR : (struct perl_thread*)SvPVX(thrsv) |
| 145 | #endif /* dTHR */ |
| 146 | |
| 147 | #ifndef INIT_THREADS |
| 148 | # ifdef NEED_PTHREAD_INIT |
| 149 | # define INIT_THREADS pthread_init() |
| 150 | # else |
| 151 | # define INIT_THREADS NOOP |
| 152 | # endif |
| 153 | #endif |
| 154 | |
| 155 | /* Accessor for per-thread SVs */ |
| 156 | #define THREADSV(i) (thr->threadsvp[i]) |
| 157 | |
| 158 | /* |
| 159 | * LOCK_SV_MUTEX and UNLOCK_SV_MUTEX are performance-critical. Here, we |
| 160 | * try only locking them if there may be more than one thread in existence. |
| 161 | * Systems with very fast mutexes (and/or slow conditionals) may wish to |
| 162 | * remove the "if (threadnum) ..." test. |
| 163 | */ |
| 164 | #define LOCK_SV_MUTEX \ |
| 165 | STMT_START { \ |
| 166 | if (threadnum) \ |
| 167 | MUTEX_LOCK(&sv_mutex); \ |
| 168 | } STMT_END |
| 169 | |
| 170 | #define UNLOCK_SV_MUTEX \ |
| 171 | STMT_START { \ |
| 172 | if (threadnum) \ |
| 173 | MUTEX_UNLOCK(&sv_mutex); \ |
| 174 | } STMT_END |
| 175 | |
| 176 | #ifndef THREAD_RET_TYPE |
| 177 | # define THREAD_RET_TYPE void * |
| 178 | # define THREAD_RET_CAST(p) ((void *)(p)) |
| 179 | #endif /* THREAD_RET */ |
| 180 | |
| 181 | |
| 182 | /* Values and macros for thr->flags */ |
| 183 | #define THRf_STATE_MASK 7 |
| 184 | #define THRf_R_JOINABLE 0 |
| 185 | #define THRf_R_JOINED 1 |
| 186 | #define THRf_R_DETACHED 2 |
| 187 | #define THRf_ZOMBIE 3 |
| 188 | #define THRf_DEAD 4 |
| 189 | |
| 190 | #define THRf_DID_DIE 8 |
| 191 | |
| 192 | /* ThrSTATE(t) and ThrSETSTATE(t) must only be called while holding t->mutex */ |
| 193 | #define ThrSTATE(t) ((t)->flags & THRf_STATE_MASK) |
| 194 | #define ThrSETSTATE(t, s) STMT_START { \ |
| 195 | (t)->flags &= ~THRf_STATE_MASK; \ |
| 196 | (t)->flags |= (s); \ |
| 197 | DEBUG_L(PerlIO_printf(PerlIO_stderr(), \ |
| 198 | "thread %p set to state %d\n", (t), (s))); \ |
| 199 | } STMT_END |
| 200 | |
| 201 | typedef struct condpair { |
| 202 | perl_mutex mutex; /* Protects all other fields */ |
| 203 | perl_cond owner_cond; /* For when owner changes at all */ |
| 204 | perl_cond cond; /* For cond_signal and cond_broadcast */ |
| 205 | Thread owner; /* Currently owning thread */ |
| 206 | } condpair_t; |
| 207 | |
| 208 | #define MgMUTEXP(mg) (&((condpair_t *)(mg->mg_ptr))->mutex) |
| 209 | #define MgOWNERCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->owner_cond) |
| 210 | #define MgCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->cond) |
| 211 | #define MgOWNER(mg) ((condpair_t *)(mg->mg_ptr))->owner |
| 212 | |
| 213 | #else |
| 214 | /* USE_THREADS is not defined */ |
| 215 | #define MUTEX_LOCK(m) |
| 216 | #define MUTEX_UNLOCK(m) |
| 217 | #define MUTEX_INIT(m) |
| 218 | #define MUTEX_DESTROY(m) |
| 219 | #define COND_INIT(c) |
| 220 | #define COND_SIGNAL(c) |
| 221 | #define COND_BROADCAST(c) |
| 222 | #define COND_WAIT(c, m) |
| 223 | #define COND_DESTROY(c) |
| 224 | #define LOCK_SV_MUTEX |
| 225 | #define UNLOCK_SV_MUTEX |
| 226 | |
| 227 | #define THR |
| 228 | /* Rats: if dTHR is just blank then the subsequent ";" throws an error */ |
| 229 | #ifdef WIN32 |
| 230 | #define dTHR extern int Perl___notused |
| 231 | #else |
| 232 | #define dTHR extern int errno |
| 233 | #endif |
| 234 | #endif /* USE_THREADS */ |