Cleanup: Re-organise source dir

[urcu.git] / urcu / futex.h

diff --git a/urcu/futex.h b/urcu/futex.h
deleted file mode 100644 (file)
index 0486ff6..0000000
--- a/urcu/futex.h
+++ /dev/null
@@ -1,125 +0,0 @@
-#ifndef _URCU_FUTEX_H
-#define _URCU_FUTEX_H
-
-/*
- * urcu-futex.h
- *
- * Userspace RCU - sys_futex/compat_futex header.
- *
- * Copyright 2011-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This 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.
- *
- * This 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 this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <urcu/config.h>
-#include <stdint.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define FUTEX_WAIT             0
-#define FUTEX_WAKE             1
-
-/*
- * sys_futex compatibility header.
- * Use *only* *either of* futex_noasync OR futex_async on a given address.
- *
- * futex_noasync cannot be executed in signal handlers, but ensures that
- * it will be put in a wait queue even in compatibility mode.
- *
- * futex_async is signal-handler safe for the wakeup. It uses polling
- * on the wait-side in compatibility mode.
- *
- * BEWARE: sys_futex() FUTEX_WAIT may return early if interrupted
- * (returns EINTR).
- */
-
-extern int compat_futex_noasync(int32_t *uaddr, int op, int32_t val,
-               const struct timespec *timeout, int32_t *uaddr2, int32_t val3);
-extern int compat_futex_async(int32_t *uaddr, int op, int32_t val,
-               const struct timespec *timeout, int32_t *uaddr2, int32_t val3);
-
-#ifdef CONFIG_RCU_HAVE_FUTEX
-
-#include <unistd.h>
-#include <errno.h>
-#include <urcu/compiler.h>
-#include <urcu/arch.h>
-
-static inline int futex(int32_t *uaddr, int op, int32_t val,
-               const struct timespec *timeout, int32_t *uaddr2, int32_t val3)
-{
-       return syscall(__NR_futex, uaddr, op, val, timeout,
-                       uaddr2, val3);
-}
-
-static inline int futex_noasync(int32_t *uaddr, int op, int32_t val,
-               const struct timespec *timeout, int32_t *uaddr2, int32_t val3)
-{
-       int ret;
-
-       ret = futex(uaddr, op, val, timeout, uaddr2, val3);
-       if (caa_unlikely(ret < 0 && errno == ENOSYS)) {
-               /*
-                * The fallback on ENOSYS is the async-safe version of
-                * the compat futex implementation, because the
-                * async-safe compat implementation allows being used
-                * concurrently with calls to futex(). Indeed, sys_futex
-                * FUTEX_WAIT, on some architectures (mips and parisc),
-                * within a given process, spuriously return ENOSYS due
-                * to signal restart bugs on some kernel versions.
-                */
-               return compat_futex_async(uaddr, op, val, timeout,
-                               uaddr2, val3);
-       }
-       return ret;
-
-}
-
-static inline int futex_async(int32_t *uaddr, int op, int32_t val,
-               const struct timespec *timeout, int32_t *uaddr2, int32_t val3)
-{
-       int ret;
-
-       ret = futex(uaddr, op, val, timeout, uaddr2, val3);
-       if (caa_unlikely(ret < 0 && errno == ENOSYS)) {
-               return compat_futex_async(uaddr, op, val, timeout,
-                               uaddr2, val3);
-       }
-       return ret;
-}
-
-#else
-
-static inline int futex_noasync(int32_t *uaddr, int op, int32_t val,
-               const struct timespec *timeout, int32_t *uaddr2, int32_t val3)
-{
-       return compat_futex_noasync(uaddr, op, val, timeout, uaddr2, val3);
-}
-
-static inline int futex_async(int32_t *uaddr, int op, int32_t val,
-               const struct timespec *timeout, int32_t *uaddr2, int32_t val3)
-{
-       return compat_futex_async(uaddr, op, val, timeout, uaddr2, val3);
-}
-
-#endif
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _URCU_FUTEX_H */