1 files changed, 115 insertions, 0 deletions
diff --git a/thread_pthread.h b/thread_pthread.h
new file mode 100644
index 0000000000..2ac354046c
--- /dev/null
+++ b/thread_pthread.h
@@ -0,0 +1,115 @@
+#ifndef RUBY_THREAD_PTHREAD_H
+#define RUBY_THREAD_PTHREAD_H
+/**********************************************************************
+
+  thread_pthread.h -
+
+  $Author$
+
+  Copyright (C) 2004-2007 Koichi Sasada
+
+**********************************************************************/
+
+#ifdef HAVE_PTHREAD_NP_H
+#include <pthread_np.h>
+#endif
+
+#define RB_NATIVETHREAD_LOCK_INIT PTHREAD_MUTEX_INITIALIZER
+#define RB_NATIVETHREAD_COND_INIT PTHREAD_COND_INITIALIZER
+
+typedef struct native_thread_data_struct {
+    union {
+        struct list_node ubf;
+        struct list_node gvl;
+    } node;
+#if defined(__GLIBC__) || defined(__FreeBSD__)
+    union
+#else
+    /*
+     * assume the platform condvars are badly implemented and have a
+     * "memory" of which mutex they're associated with
+     */
+    struct
+#endif
+    {
+        rb_nativethread_cond_t intr; /* th->interrupt_lock */
+        rb_nativethread_cond_t gvlq; /* vm->gvl.lock */
+    } cond;
+} native_thread_data_t;
+
+#undef except
+#undef try
+#undef leave
+#undef finally
+
+typedef struct rb_global_vm_lock_struct {
+    /* fast path */
+    const struct rb_thread_struct *owner;
+    rb_nativethread_lock_t lock; /* AKA vm->gvl.lock */
+
+    /*
+     * slow path, protected by vm->gvl.lock
+     * - @waitq - FIFO queue of threads waiting for GVL
+     * - @timer - it handles timeslices for @owner.  It is any one thread
+     *   in @waitq, there is no @timer if @waitq is empty, but always
+     *   a @timer if @waitq has entries
+     * - @timer_err tracks timeslice limit, the timeslice only resets
+     *   when pthread_cond_timedwait returns ETIMEDOUT, so frequent
+     *   switching between contended/uncontended GVL won't reset the
+     *   timer.
+     */
+    struct list_head waitq; /* <=> native_thread_data_t.node.ubf */
+    const struct rb_thread_struct *timer;
+    int timer_err;
+
+    /* yield */
+    rb_nativethread_cond_t switch_cond;
+    rb_nativethread_cond_t switch_wait_cond;
+    int need_yield;
+    int wait_yield;
+} rb_global_vm_lock_t;
+
+
+#if __STDC_VERSION__ >= 201112
+  #define RB_THREAD_LOCAL_SPECIFIER _Thread_local
+#elif defined(__GNUC__)
+  /* note that ICC (linux) and Clang are covered by __GNUC__ */
+  #define RB_THREAD_LOCAL_SPECIFIER __thread
+#else
+
+typedef pthread_key_t native_tls_key_t;
+
+static inline void *
+native_tls_get(native_tls_key_t key)
+{
+    void *ptr = pthread_getspecific(key);
+    if (UNLIKELY(ptr == NULL)) {
+        rb_bug("pthread_getspecific returns NULL");
+    }
+    return ptr;
+}
+
+static inline void
+native_tls_set(native_tls_key_t key, void *ptr)
+{
+    if (UNLIKELY(pthread_setspecific(key, ptr) != 0)) {
+        rb_bug("pthread_setspecific error");
+    }
+}
+#endif
+
+RUBY_SYMBOL_EXPORT_BEGIN
+#ifdef RB_THREAD_LOCAL_SPECIFIER
+  #ifdef __APPLE__
+    // on Darwin, TLS can not be accessed across .so
+    struct rb_execution_context_struct *rb_current_ec(void);
+    void rb_current_ec_set(struct rb_execution_context_struct *);
+  #else
+    RUBY_EXTERN RB_THREAD_LOCAL_SPECIFIER struct rb_execution_context_struct *ruby_current_ec;
+  #endif
+#else
+  RUBY_EXTERN native_tls_key_t ruby_current_ec_key;
+#endif
+RUBY_SYMBOL_EXPORT_END
+
+#endif /* RUBY_THREAD_PTHREAD_H */