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Diffstat (limited to 'Master/tlpkg/tlperl/lib/CORE/thread.h')
-rw-r--r--Master/tlpkg/tlperl/lib/CORE/thread.h255
1 files changed, 164 insertions, 91 deletions
diff --git a/Master/tlpkg/tlperl/lib/CORE/thread.h b/Master/tlpkg/tlperl/lib/CORE/thread.h
index 2603d549f56..dcec0c064b8 100644
--- a/Master/tlpkg/tlperl/lib/CORE/thread.h
+++ b/Master/tlpkg/tlperl/lib/CORE/thread.h
@@ -22,12 +22,12 @@
# ifdef OLD_PTHREADS_API /* Here be dragons. */
# define DETACH(t) \
STMT_START { \
- int _eC_; \
- if ((_eC_ = pthread_detach(&(t)->self))) { \
- MUTEX_UNLOCK(&(t)->mutex); \
- Perl_croak_nocontext("panic: DETACH (%d) [%s:%d]", \
- _eC_, __FILE__, __LINE__); \
- } \
+ int _eC_; \
+ if ((_eC_ = pthread_detach(&(t)->self))) { \
+ MUTEX_UNLOCK(&(t)->mutex); \
+ Perl_croak_nocontext("panic: DETACH (%d) [%s:%d]", \
+ _eC_, __FILE__, __LINE__); \
+ } \
} STMT_END
# define PERL_GET_CONTEXT Perl_get_context()
@@ -106,33 +106,33 @@
#define MUTEX_INIT(m) \
STMT_START { \
- *m = mutex_alloc(); \
- if (*m) { \
- mutex_init(*m); \
- } else { \
- Perl_croak_nocontext("panic: MUTEX_INIT [%s:%d]", \
- __FILE__, __LINE__); \
- } \
+ *m = mutex_alloc(); \
+ if (*m) { \
+ mutex_init(*m); \
+ } else { \
+ Perl_croak_nocontext("panic: MUTEX_INIT [%s:%d]", \
+ __FILE__, __LINE__); \
+ } \
} STMT_END
#define MUTEX_LOCK(m) mutex_lock(*m)
#define MUTEX_UNLOCK(m) mutex_unlock(*m)
#define MUTEX_DESTROY(m) \
STMT_START { \
- mutex_free(*m); \
- *m = 0; \
+ mutex_free(*m); \
+ *m = 0; \
} STMT_END
#define COND_INIT(c) \
STMT_START { \
- *c = condition_alloc(); \
- if (*c) { \
- condition_init(*c); \
- } \
- else { \
- Perl_croak_nocontext("panic: COND_INIT [%s:%d]", \
- __FILE__, __LINE__); \
- } \
+ *c = condition_alloc(); \
+ if (*c) { \
+ condition_init(*c); \
+ } \
+ else { \
+ Perl_croak_nocontext("panic: COND_INIT [%s:%d]", \
+ __FILE__, __LINE__); \
+ } \
} STMT_END
#define COND_SIGNAL(c) condition_signal(*c)
@@ -140,15 +140,11 @@
#define COND_WAIT(c, m) condition_wait(*c, *m)
#define COND_DESTROY(c) \
STMT_START { \
- condition_free(*c); \
- *c = 0; \
+ condition_free(*c); \
+ *c = 0; \
} STMT_END
-#define THREAD_CREATE(thr, f) (thr->self = cthread_fork(f, thr), 0)
-#define THREAD_POST_CREATE(thr) NOOP
-
#define THREAD_RET_TYPE any_t
-#define THREAD_RET_CAST(x) ((any_t) x)
#define DETACH(t) cthread_detach(t->self)
#define JOIN(t, avp) (*(avp) = MUTABLE_AV(cthread_join(t->self)))
@@ -186,19 +182,19 @@
/* Temporary workaround, true bug is deeper. --jhi 1999-02-25 */
# define MUTEX_INIT(m) \
STMT_START { \
- int _eC_; \
- Zero((m), 1, perl_mutex); \
- if ((_eC_ = pthread_mutex_init((m), pthread_mutexattr_default))) \
- Perl_croak_nocontext("panic: MUTEX_INIT (%d) [%s:%d]", \
- _eC_, __FILE__, __LINE__); \
+ int _eC_; \
+ Zero((m), 1, perl_mutex); \
+ if ((_eC_ = pthread_mutex_init((m), pthread_mutexattr_default))) \
+ Perl_croak_nocontext("panic: MUTEX_INIT (%d) [%s:%d]", \
+ _eC_, __FILE__, __LINE__); \
} STMT_END
# else
# define MUTEX_INIT(m) \
STMT_START { \
- int _eC_; \
- if ((_eC_ = pthread_mutex_init((m), pthread_mutexattr_default))) \
- Perl_croak_nocontext("panic: MUTEX_INIT (%d) [%s:%d]", \
- _eC_, __FILE__, __LINE__); \
+ int _eC_; \
+ if ((_eC_ = pthread_mutex_init((m), pthread_mutexattr_default))) \
+ Perl_croak_nocontext("panic: MUTEX_INIT (%d) [%s:%d]", \
+ _eC_, __FILE__, __LINE__); \
} STMT_END
# endif
@@ -212,91 +208,160 @@
# define MUTEX_LOCK(m) \
STMT_START { \
- int _eC_; \
- if ((_eC_ = perl_pthread_mutex_lock((m)))) \
- Perl_croak_nocontext("panic: MUTEX_LOCK (%d) [%s:%d]", \
- _eC_, __FILE__, __LINE__); \
+ int _eC_; \
+ if ((_eC_ = perl_pthread_mutex_lock((m)))) \
+ Perl_croak_nocontext("panic: MUTEX_LOCK (%d) [%s:%d]", \
+ _eC_, __FILE__, __LINE__); \
} STMT_END
# define MUTEX_UNLOCK(m) \
STMT_START { \
- int _eC_; \
- if ((_eC_ = perl_pthread_mutex_unlock((m)))) \
- Perl_croak_nocontext("panic: MUTEX_UNLOCK (%d) [%s:%d]", \
- _eC_, __FILE__, __LINE__); \
+ int _eC_; \
+ if ((_eC_ = perl_pthread_mutex_unlock((m)))) \
+ Perl_croak_nocontext("panic: MUTEX_UNLOCK (%d) [%s:%d]", \
+ _eC_, __FILE__, __LINE__); \
} STMT_END
# define MUTEX_DESTROY(m) \
STMT_START { \
- int _eC_; \
- if ((_eC_ = pthread_mutex_destroy((m)))) \
- Perl_croak_nocontext("panic: MUTEX_DESTROY (%d) [%s:%d]", \
- _eC_, __FILE__, __LINE__); \
+ int _eC_; \
+ if ((_eC_ = pthread_mutex_destroy((m)))) \
+ Perl_croak_nocontext("panic: MUTEX_DESTROY (%d) [%s:%d]", \
+ _eC_, __FILE__, __LINE__); \
} STMT_END
#endif /* MUTEX_INIT */
#ifndef COND_INIT
# define COND_INIT(c) \
STMT_START { \
- int _eC_; \
- if ((_eC_ = pthread_cond_init((c), pthread_condattr_default))) \
- Perl_croak_nocontext("panic: COND_INIT (%d) [%s:%d]", \
- _eC_, __FILE__, __LINE__); \
+ int _eC_; \
+ if ((_eC_ = pthread_cond_init((c), pthread_condattr_default))) \
+ Perl_croak_nocontext("panic: COND_INIT (%d) [%s:%d]", \
+ _eC_, __FILE__, __LINE__); \
} STMT_END
# define COND_SIGNAL(c) \
STMT_START { \
- int _eC_; \
- if ((_eC_ = pthread_cond_signal((c)))) \
- Perl_croak_nocontext("panic: COND_SIGNAL (%d) [%s:%d]", \
- _eC_, __FILE__, __LINE__); \
+ int _eC_; \
+ if ((_eC_ = pthread_cond_signal((c)))) \
+ Perl_croak_nocontext("panic: COND_SIGNAL (%d) [%s:%d]", \
+ _eC_, __FILE__, __LINE__); \
} STMT_END
# define COND_BROADCAST(c) \
STMT_START { \
- int _eC_; \
- if ((_eC_ = pthread_cond_broadcast((c)))) \
- Perl_croak_nocontext("panic: COND_BROADCAST (%d) [%s:%d]", \
- _eC_, __FILE__, __LINE__); \
+ int _eC_; \
+ if ((_eC_ = pthread_cond_broadcast((c)))) \
+ Perl_croak_nocontext("panic: COND_BROADCAST (%d) [%s:%d]", \
+ _eC_, __FILE__, __LINE__); \
} STMT_END
# define COND_WAIT(c, m) \
STMT_START { \
- int _eC_; \
- if ((_eC_ = pthread_cond_wait((c), (m)))) \
- Perl_croak_nocontext("panic: COND_WAIT (%d) [%s:%d]", \
- _eC_, __FILE__, __LINE__); \
+ int _eC_; \
+ if ((_eC_ = pthread_cond_wait((c), (m)))) \
+ Perl_croak_nocontext("panic: COND_WAIT (%d) [%s:%d]", \
+ _eC_, __FILE__, __LINE__); \
} STMT_END
# define COND_DESTROY(c) \
STMT_START { \
- int _eC_; \
- if ((_eC_ = pthread_cond_destroy((c)))) \
- Perl_croak_nocontext("panic: COND_DESTROY (%d) [%s:%d]", \
- _eC_, __FILE__, __LINE__); \
+ int _eC_; \
+ if ((_eC_ = pthread_cond_destroy((c)))) \
+ Perl_croak_nocontext("panic: COND_DESTROY (%d) [%s:%d]", \
+ _eC_, __FILE__, __LINE__); \
} STMT_END
#endif /* COND_INIT */
+#if defined(MUTEX_LOCK) && defined(MUTEX_UNLOCK) \
+ && defined(COND_SIGNAL) && defined(COND_WAIT)
+
+/* These emulate native many-reader/1-writer locks.
+ * Basically a locking reader just locks the semaphore long enough to increment
+ * a counter; and similarly decrements it when when through. Any writer will
+ * run only when the count of readers is 0. That is because it blocks on that
+ * semaphore (doing a COND_WAIT) until it gets control of it, which won't
+ * happen unless the count becomes 0. ALL readers and other writers are then
+ * blocked until it releases the semaphore. The reader whose unlocking causes
+ * the count to become 0 signals any waiting writers, and the system guarantees
+ * that only one gets control at a time */
+
+# define PERL_READ_LOCK(mutex) \
+ STMT_START { \
+ MUTEX_LOCK(&(mutex)->lock); \
+ (mutex)->readers_count++; \
+ MUTEX_UNLOCK(&(mutex)->lock); \
+ } STMT_END
+
+# define PERL_READ_UNLOCK(mutex) \
+ STMT_START { \
+ MUTEX_LOCK(&(mutex)->lock); \
+ (mutex)->readers_count--; \
+ if ((mutex)->readers_count <= 0) { \
+ assert((mutex)->readers_count == 0); \
+ COND_SIGNAL(&(mutex)->wakeup); \
+ (mutex)->readers_count = 0; \
+ } \
+ MUTEX_UNLOCK(&(mutex)->lock); \
+ } STMT_END
+
+# define PERL_WRITE_LOCK(mutex) \
+ STMT_START { \
+ MUTEX_LOCK(&(mutex)->lock); \
+ do { \
+ if ((mutex)->readers_count <= 0) { \
+ assert((mutex)->readers_count == 0); \
+ (mutex)->readers_count = 0; \
+ break; \
+ } \
+ COND_WAIT(&(mutex)->wakeup, &(mutex)->lock); \
+ } \
+ while (1); \
+ \
+ /* Here, the mutex is locked, with no readers */ \
+ } STMT_END
+
+# define PERL_WRITE_UNLOCK(mutex) \
+ STMT_START { \
+ COND_SIGNAL(&(mutex)->wakeup); \
+ MUTEX_UNLOCK(&(mutex)->lock); \
+ } STMT_END
+
+# define PERL_RW_MUTEX_INIT(mutex) \
+ STMT_START { \
+ MUTEX_INIT(&(mutex)->lock); \
+ COND_INIT(&(mutex)->wakeup); \
+ (mutex)->readers_count = 0; \
+ } STMT_END
+
+# define PERL_RW_MUTEX_DESTROY(mutex) \
+ STMT_START { \
+ COND_DESTROY(&(mutex)->wakeup); \
+ MUTEX_DESTROY(&(mutex)->lock); \
+ } STMT_END
+
+#endif
+
/* DETACH(t) must only be called while holding t->mutex */
#ifndef DETACH
# define DETACH(t) \
STMT_START { \
- int _eC_; \
- if ((_eC_ = pthread_detach((t)->self))) { \
- MUTEX_UNLOCK(&(t)->mutex); \
- Perl_croak_nocontext("panic: DETACH (%d) [%s:%d]", \
- _eC_, __FILE__, __LINE__); \
- } \
+ int _eC_; \
+ if ((_eC_ = pthread_detach((t)->self))) { \
+ MUTEX_UNLOCK(&(t)->mutex); \
+ Perl_croak_nocontext("panic: DETACH (%d) [%s:%d]", \
+ _eC_, __FILE__, __LINE__); \
+ } \
} STMT_END
#endif /* DETACH */
#ifndef JOIN
# define JOIN(t, avp) \
STMT_START { \
- int _eC_; \
- if ((_eC_ = pthread_join((t)->self, (void**)(avp)))) \
- Perl_croak_nocontext("panic: pthread_join (%d) [%s:%d]", \
- _eC_, __FILE__, __LINE__); \
+ int _eC_; \
+ if ((_eC_ = pthread_join((t)->self, (void**)(avp)))) \
+ Perl_croak_nocontext("panic: pthread_join (%d) [%s:%d]", \
+ _eC_, __FILE__, __LINE__); \
} STMT_END
#endif /* JOIN */
@@ -321,10 +386,10 @@
#ifndef PERL_SET_CONTEXT
# define PERL_SET_CONTEXT(t) \
STMT_START { \
- int _eC_; \
- if ((_eC_ = pthread_setspecific(PL_thr_key, (void *)(t)))) \
- Perl_croak_nocontext("panic: pthread_setspecific (%d) [%s:%d]", \
- _eC_, __FILE__, __LINE__); \
+ int _eC_; \
+ if ((_eC_ = pthread_setspecific(PL_thr_key, (void *)(t)))) \
+ Perl_croak_nocontext("panic: pthread_setspecific (%d) [%s:%d]", \
+ _eC_, __FILE__, __LINE__); \
} STMT_END
#endif /* PERL_SET_CONTEXT */
@@ -337,33 +402,32 @@
#ifndef ALLOC_THREAD_KEY
# define ALLOC_THREAD_KEY \
STMT_START { \
- if (pthread_key_create(&PL_thr_key, 0)) { \
+ if (pthread_key_create(&PL_thr_key, 0)) { \
PERL_UNUSED_RESULT(write(2, STR_WITH_LEN("panic: pthread_key_create failed\n"))); \
- exit(1); \
- } \
+ exit(1); \
+ } \
} STMT_END
#endif
#ifndef FREE_THREAD_KEY
# define FREE_THREAD_KEY \
STMT_START { \
- pthread_key_delete(PL_thr_key); \
+ pthread_key_delete(PL_thr_key); \
} STMT_END
#endif
#ifndef PTHREAD_ATFORK
# ifdef HAS_PTHREAD_ATFORK
# define PTHREAD_ATFORK(prepare,parent,child) \
- pthread_atfork(prepare,parent,child)
+ pthread_atfork(prepare,parent,child)
# else
# define PTHREAD_ATFORK(prepare,parent,child) \
- NOOP
+ NOOP
# endif
#endif
#ifndef THREAD_RET_TYPE
# define THREAD_RET_TYPE void *
-# define THREAD_RET_CAST(p) ((void *)(p))
#endif /* THREAD_RET */
# define LOCK_DOLLARZERO_MUTEX MUTEX_LOCK(&PL_dollarzero_mutex)
@@ -407,6 +471,15 @@
# define COND_DESTROY(c) NOOP
#endif
+#ifndef PERL_READ_LOCK
+# define PERL_READ_LOCK NOOP
+# define PERL_READ_UNLOCK NOOP
+# define PERL_WRITE_LOCK NOOP
+# define PERL_WRITE_UNLOCK NOOP
+# define PERL_RW_MUTEX_INIT NOOP
+# define PERL_RW_MUTEX_DESTROY NOOP
+#endif
+
#ifndef LOCK_DOLLARZERO_MUTEX
# define LOCK_DOLLARZERO_MUTEX NOOP
#endif