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-rw-r--r--gcc-4.7/libgomp/config/linux/ptrlock.h74
1 files changed, 0 insertions, 74 deletions
diff --git a/gcc-4.7/libgomp/config/linux/ptrlock.h b/gcc-4.7/libgomp/config/linux/ptrlock.h
deleted file mode 100644
index 2f17e09cc..000000000
--- a/gcc-4.7/libgomp/config/linux/ptrlock.h
+++ /dev/null
@@ -1,74 +0,0 @@
-/* Copyright (C) 2008, 2009, 2011 Free Software Foundation, Inc.
- Contributed by Jakub Jelinek <jakub@redhat.com>.
-
- This file is part of the GNU OpenMP Library (libgomp).
-
- Libgomp is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3, or (at your option)
- any later version.
-
- Libgomp 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 General Public License for
- more details.
-
- Under Section 7 of GPL version 3, you are granted additional
- permissions described in the GCC Runtime Library Exception, version
- 3.1, as published by the Free Software Foundation.
-
- You should have received a copy of the GNU General Public License and
- a copy of the GCC Runtime Library Exception along with this program;
- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
- <http://www.gnu.org/licenses/>. */
-
-/* This is a Linux specific implementation of a mutex synchronization
- mechanism for libgomp. This type is private to the library. This
- implementation uses atomic instructions and the futex syscall.
-
- A ptrlock has four states:
- 0/NULL Initial
- 1 Owned by me, I get to write a pointer to ptrlock.
- 2 Some thread is waiting on the ptrlock.
- >2 Ptrlock contains a valid pointer.
- It is not valid to gain the ptrlock and then write a NULL to it. */
-
-#ifndef GOMP_PTRLOCK_H
-#define GOMP_PTRLOCK_H 1
-
-typedef void *gomp_ptrlock_t;
-
-static inline void gomp_ptrlock_init (gomp_ptrlock_t *ptrlock, void *ptr)
-{
- *ptrlock = ptr;
-}
-
-extern void *gomp_ptrlock_get_slow (gomp_ptrlock_t *ptrlock);
-static inline void *gomp_ptrlock_get (gomp_ptrlock_t *ptrlock)
-{
- uintptr_t oldval;
-
- if ((uintptr_t) *ptrlock > 2)
- return *ptrlock;
-
- oldval = 0;
- if (__atomic_compare_exchange_n (ptrlock, &oldval, 1, false,
- MEMMODEL_ACQUIRE, MEMMODEL_ACQUIRE))
- return NULL;
-
- return gomp_ptrlock_get_slow (ptrlock);
-}
-
-extern void gomp_ptrlock_set_slow (gomp_ptrlock_t *ptrlock);
-static inline void gomp_ptrlock_set (gomp_ptrlock_t *ptrlock, void *ptr)
-{
- void *wait = __atomic_exchange_n (ptrlock, ptr, MEMMODEL_RELEASE);
- if ((uintptr_t) wait != 1)
- gomp_ptrlock_set_slow (ptrlock);
-}
-
-static inline void gomp_ptrlock_destroy (gomp_ptrlock_t *ptrlock)
-{
-}
-
-#endif /* GOMP_PTRLOCK_H */