diff mbox series

[hurd,commited,4/7] htl: Add futex-internal.h

Message ID 20201216005944.3091900-5-samuel.thibault@ens-lyon.org
State New
Headers show
Series hurd: add pshared semaphore support. | expand

Commit Message

Samuel Thibault Dec. 16, 2020, 12:59 a.m. UTC 
That provides futex_supports_pshared
---
 sysdeps/htl/futex-internal.h | 39 ++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 sysdeps/htl/futex-internal.h
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Patch

diff --git a/sysdeps/htl/futex-internal.h b/sysdeps/htl/futex-internal.h
new file mode 100644
index 0000000000..2b7a13aff0
--- /dev/null
+++ b/sysdeps/htl/futex-internal.h
@@ -0,0 +1,39 @@ 
+/* futex operations for glibc-internal use.  Stub version; do not include
+   this file directly.
+   Copyright (C) 2014-2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef STUB_FUTEX_INTERNAL_H
+#define STUB_FUTEX_INTERNAL_H
+
+#include <pthread.h>
+
+/* Returns EINVAL if PSHARED is neither PTHREAD_PROCESS_PRIVATE nor
+   PTHREAD_PROCESS_SHARED; otherwise, returns 0 if PSHARED is supported, and
+   ENOTSUP if not.  */
+static __always_inline int
+futex_supports_pshared (int pshared)
+{
+  if (__glibc_likely (pshared == PTHREAD_PROCESS_PRIVATE))
+    return 0;
+  else if (pshared == PTHREAD_PROCESS_SHARED)
+    return 0;
+  else
+    return EINVAL;
+}
+
+#endif  /* futex-internal.h */