1 files changed, 64 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/getpid.c b/sysdeps/unix/sysv/linux/getpid.c
new file mode 100644
index 0000000000..937b1d4e11
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/getpid.c
@@ -0,0 +1,64 @@
+/* Copyright (C) 2003-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
+
+   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 <unistd.h>
+#include <tls.h>
+#include <sysdep.h>
+
+
+#ifndef NOT_IN_libc
+static inline __attribute__((always_inline)) pid_t really_getpid (pid_t oldval);
+
+static inline __attribute__((always_inline)) pid_t
+really_getpid (pid_t oldval)
+{
+  if (__glibc_likely (oldval == 0))
+    {
+      pid_t selftid = THREAD_GETMEM (THREAD_SELF, tid);
+      if (__glibc_likely (selftid != 0))
+	return selftid;
+    }
+
+  INTERNAL_SYSCALL_DECL (err);
+  pid_t result = INTERNAL_SYSCALL (getpid, err, 0);
+
+  /* We do not set the PID field in the TID here since we might be
+     called from a signal handler while the thread executes fork.  */
+  if (oldval == 0)
+    THREAD_SETMEM (THREAD_SELF, tid, result);
+  return result;
+}
+#endif
+
+pid_t
+__getpid (void)
+{
+#ifdef NOT_IN_libc
+  INTERNAL_SYSCALL_DECL (err);
+  pid_t result = INTERNAL_SYSCALL (getpid, err, 0);
+#else
+  pid_t result = THREAD_GETMEM (THREAD_SELF, pid);
+  if (__glibc_unlikely (result <= 0))
+    result = really_getpid (result);
+#endif
+  return result;
+}
+
+libc_hidden_def (__getpid)
+weak_alias (__getpid, getpid)
+libc_hidden_def (getpid)