1 files changed, 90 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/htl/pt-mutex.h b/sysdeps/mach/hurd/htl/pt-mutex.h
new file mode 100644
index 0000000000..2daf63e986
--- /dev/null
+++ b/sysdeps/mach/hurd/htl/pt-mutex.h
@@ -0,0 +1,90 @@
+/* Internal definitions for pthreads library.
+   Copyright (C) 2016-2018 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/>.  */
+
+#ifndef _PT_MUTEX_H
+#define _PT_MUTEX_H	1
+
+/* Special ID used to signal an unrecoverable robust mutex. */
+#define NOTRECOVERABLE_ID   (1U << 31)
+
+/* Common path for robust mutexes. Assumes the variable 'ret'
+ * is bound in the function this is called from. */
+#define ROBUST_LOCK(self, mtxp, cb, ...)   \
+  if (mtxp->__owner_id == NOTRECOVERABLE_ID)   \
+    return ENOTRECOVERABLE;   \
+  else if (mtxp->__owner_id == self->thread &&   \
+      __getpid () == (int)(mtxp->__lock & LLL_OWNER_MASK))   \
+    {   \
+      if (mtxp->__type == PT_MTX_RECURSIVE)   \
+        {   \
+          if (__glibc_unlikely (mtxp->__cnt + 1 == 0))   \
+            return EAGAIN;   \
+          \
+          ++mtxp->__cnt;   \
+          return 0;   \
+        }   \
+      else if (mtxp->__type == PT_MTX_ERRORCHECK)   \
+        return EDEADLK;   \
+    }   \
+  \
+  ret = cb (&mtxp->__lock, ##__VA_ARGS__);   \
+  if (ret == 0 || ret == EOWNERDEAD)   \
+    {   \
+      if (mtxp->__owner_id == ENOTRECOVERABLE)   \
+        ret = ENOTRECOVERABLE;   \
+      else   \
+        {   \
+          mtxp->__owner_id = self->thread;   \
+          mtxp->__cnt = 1;   \
+          if (ret == EOWNERDEAD)   \
+            {   \
+              mtxp->__lock = mtxp->__lock | LLL_DEAD_OWNER;   \
+              atomic_write_barrier ();   \
+            }   \
+        }   \
+    }   \
+  (void)0
+
+/* Check that a thread owns the mutex. For non-robust, task-shared
+ * objects, we have to check the thread *and* process-id. */
+#define mtx_owned_p(mtx, pt, flags)   \
+  ((mtx)->__owner_id == (pt)->thread &&   \
+    (((flags) & GSYNC_SHARED) == 0 ||   \
+      (mtx)->__shpid == __getpid ()))
+
+/* Record a thread as the owner of the mutex. */
+#define mtx_set_owner(mtx, pt, flags)   \
+  (void)   \
+    ({   \
+       (mtx)->__owner_id = (pt)->thread;   \
+       if ((flags) & GSYNC_SHARED)   \
+         (mtx)->__shpid = __getpid ();   \
+     })
+
+/* Redefined mutex types. The +1 is for binary compatibility. */
+#define PT_MTX_NORMAL       __PTHREAD_MUTEX_TIMED
+#define PT_MTX_RECURSIVE    (__PTHREAD_MUTEX_RECURSIVE + 1)
+#define PT_MTX_ERRORCHECK   (__PTHREAD_MUTEX_ERRORCHECK + 1)
+
+/* Mutex type, including robustness. */
+#define MTX_TYPE(mtxp)   \
+  ((mtxp)->__type | ((mtxp)->__flags & PTHREAD_MUTEX_ROBUST))
+
+extern int __getpid (void) __attribute__ ((const));
+
+#endif /* pt-mutex.h */