NPTL thread creation

1 files changed, 46 insertions, 0 deletions

diff --git a/sysdeps/nacl/createthread.c b/sysdeps/nacl/createthread.c
new file mode 100644
index 0000000000..89a58a7807
--- /dev/null
+++ b/sysdeps/nacl/createthread.c
@@ -0,0 +1,46 @@
+/* Low-level thread creation for NPTL.  NaCl version.
+   Copyright (C) 2014 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <nacl-interfaces.h>
+
+/* See the comments in pthread_create.c for the requirements for these
+   two macros and the create_thread function.  */
+
+#define START_THREAD_DEFN \
+  static void __attribute__ ((noreturn)) start_thread (void)
+#define START_THREAD_SELF THREAD_SELF
+
+/* pthread_create.c defines this using START_THREAD_DEFN
+   We need a forward declaration here so we can take its address.  */
+static void start_thread (void) __attribute__ ((noreturn));
+
+static int
+create_thread (struct pthread *pd, const struct pthread_attr *attr,
+	       bool stopped_start, STACK_VARIABLES_PARMS, bool *thread_ran)
+{
+  pd->stopped_start = stopped_start;
+  if (__glibc_unlikely (stopped_start))
+    /* We make sure the thread does not run far by forcing it to get a
+       lock.  We lock it here too so that the new thread cannot continue
+       until we tell it to.  */
+    lll_lock (pd->lock, LLL_PRIVATE);
+
+  TLS_DEFINE_INIT_TP (tp, pd);
+
+  return __nacl_irt_thread.thread_create (&start_thread, stackaddr, tp);
+}