# include <win32thread.h>
#else
+#ifndef DJGPP
/* POSIXish threads */
#ifdef OLD_PTHREADS_API
# define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
#else
# define pthread_mutexattr_default NULL
# define pthread_condattr_default NULL
-# define pthread_attr_default NULL
#endif /* OLD_PTHREADS_API */
#endif
+#endif
-#ifndef YIELD
-# ifdef HAS_PTHREAD_YIELD
-# define YIELD pthread_yield()
+#ifdef PTHREADS_CREATED_JOINABLE
+# define ATTR_JOINABLE PTHREAD_CREATE_JOINABLE
+#else
+# ifdef PTHREAD_CREATE_UNDETACHED
+# define ATTR_JOINABLE PTHREAD_CREATE_UNDETACHED
# else
+# define ATTR_JOINABLE PTHREAD_CREATE_JOINABLE
+# endif
+#endif
+
+#ifndef YIELD
+# ifdef HAS_SCHED_YIELD
# define YIELD sched_yield()
+# else
+# ifdef HAS_PTHREAD_YIELD
+# define YIELD pthread_yield()
+# endif
# endif
#endif
# endif /* OLD_PTHREADS_API */
#endif /* THR */
+/*
+ * dTHR is performance-critical. Here, we only do the pthread_get_specific
+ * if there may be more than one thread in existence, otherwise we get thr
+ * from thrsv which is cached in the per-interpreter structure.
+ * Systems with very fast pthread_get_specific (which should be all systems
+ * but unfortunately isn't) may wish to simplify to "...*thr = THR".
+ */
#ifndef dTHR
-# define dTHR struct perl_thread *thr = THR
+# define dTHR \
+ struct perl_thread *thr = threadnum? THR : (struct perl_thread*)SvPVX(thrsv)
#endif /* dTHR */
#ifndef INIT_THREADS
# endif
#endif
+/* Accessor for per-thread SVs */
+#define THREADSV(i) (thr->threadsvp[i])
+
+/*
+ * LOCK_SV_MUTEX and UNLOCK_SV_MUTEX are performance-critical. Here, we
+ * try only locking them if there may be more than one thread in existence.
+ * Systems with very fast mutexes (and/or slow conditionals) may wish to
+ * remove the "if (threadnum) ..." test.
+ */
+#define LOCK_SV_MUTEX \
+ STMT_START { \
+ if (threadnum) \
+ MUTEX_LOCK(&sv_mutex); \
+ } STMT_END
+
+#define UNLOCK_SV_MUTEX \
+ STMT_START { \
+ if (threadnum) \
+ MUTEX_UNLOCK(&sv_mutex); \
+ } STMT_END
#ifndef THREAD_RET_TYPE
# define THREAD_RET_TYPE void *
#define COND_BROADCAST(c)
#define COND_WAIT(c, m)
#define COND_DESTROY(c)
+#define LOCK_SV_MUTEX
+#define UNLOCK_SV_MUTEX
#define THR
/* Rats: if dTHR is just blank then the subsequent ";" throws an error */