1 files changed, 94 insertions, 0 deletions
diff --git a/sysdeps/mach/htl/pt-thread-alloc.c b/sysdeps/mach/htl/pt-thread-alloc.c
new file mode 100644
index 0000000000..3c763ef7cb
--- /dev/null
+++ b/sysdeps/mach/htl/pt-thread-alloc.c
@@ -0,0 +1,94 @@
+/* Start thread.  Mach version.
+   Copyright (C) 2000-2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#include <assert.h>
+#include <errno.h>
+#include <string.h>
+
+#include <mach.h>
+
+#include <pt-internal.h>
+
+/* Prepare a wakeup message.  */
+static error_t
+create_wakeupmsg (struct __pthread *thread)
+{
+  kern_return_t err;
+
+  /* Build wakeup message.  */
+  thread->wakeupmsg.msgh_bits = MACH_MSGH_BITS (MACH_MSG_TYPE_COPY_SEND, 0);
+  thread->wakeupmsg.msgh_size = 0;
+
+  err = __mach_port_allocate (__mach_task_self (), MACH_PORT_RIGHT_RECEIVE,
+			      &thread->wakeupmsg.msgh_remote_port);
+  if (err)
+    return EAGAIN;
+
+  thread->wakeupmsg.msgh_local_port = MACH_PORT_NULL;
+  thread->wakeupmsg.msgh_seqno = 0;
+  thread->wakeupmsg.msgh_id = 0;
+
+  err = __mach_port_insert_right (__mach_task_self (),
+				  thread->wakeupmsg.msgh_remote_port,
+				  thread->wakeupmsg.msgh_remote_port,
+				  MACH_MSG_TYPE_MAKE_SEND);
+  if (err)
+    {
+      __mach_port_destroy (__mach_task_self (),
+			   thread->wakeupmsg.msgh_remote_port);
+      return EAGAIN;
+    }
+
+  /* No need to queue more than one wakeup message on this port.  */
+  __mach_port_set_qlimit (__mach_task_self (),
+			  thread->wakeupmsg.msgh_remote_port, 1);
+
+  return 0;
+}
+
+/* Allocate any resouces for THREAD.  The new kernel thread should not
+   be eligible to be scheduled.  */
+int
+__pthread_thread_alloc (struct __pthread *thread)
+{
+  static int do_create;
+  error_t err;
+
+  err = create_wakeupmsg (thread);
+  if (err)
+    return err;
+
+  if (!do_create)
+    {
+      assert (__pthread_total == 0);
+      thread->kernel_thread = __mach_thread_self ();
+      do_create = 1;
+    }
+  else
+    {
+      err = __thread_create (__mach_task_self (), &thread->kernel_thread);
+      if (err)
+	{
+	  __mach_port_destroy (__mach_task_self (),
+			       thread->wakeupmsg.msgh_remote_port);
+	  return EAGAIN;
+	}
+    }
+
+  return 0;
+}