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Diffstat (limited to 'libglusterfs/src/atomic.h')
| -rw-r--r-- | libglusterfs/src/atomic.h | 109 |
1 files changed, 0 insertions, 109 deletions
diff --git a/libglusterfs/src/atomic.h b/libglusterfs/src/atomic.h deleted file mode 100644 index 71fcb1ee972..00000000000 --- a/libglusterfs/src/atomic.h +++ /dev/null @@ -1,109 +0,0 @@ -/* - Copyright (c) 2017 Red Hat, Inc. <http://www.redhat.com> - This file is part of GlusterFS. - - This file is licensed to you under your choice of the GNU Lesser - General Public License, version 3 or any later version (LGPLv3 or - later), or the GNU General Public License, version 2 (GPLv2), in all - cases as published by the Free Software Foundation. -*/ - -#ifndef _ATOMIC_H -#define _ATOMIC_H - -#include <inttypes.h> - -#if defined(HAVE_ATOMIC_BUILTINS) || defined(HAVE_SYNC_BUILTINS) -/* optimized implementation, macros only */ - -typedef struct gf_atomic_t { - int64_t cnt; -} gf_atomic_t; - -#if defined(HAVE_ATOMIC_BUILTINS) - -/* all macros have a 'gf_atomic_t' as 1st argument */ -#define GF_ATOMIC_INIT(op, n) __atomic_store (&(op.cnt), __ATOMIC_RELEASE) -#define GF_ATOMIC_GET(op) __atomic_load (&(op.cnt), __ATOMIC_ACQUIRE) -#define GF_ATOMIC_INC(op) __atomic_add_and_fetch (&(op.cnt), 1, \ - __ATOMIC_ACQ_REL) -#define GF_ATOMIC_DEC(op) __atomic_sub_and_fetch (&(op.cnt), 1, \ - __ATOMIC_ACQ_REL) -#define GF_ATOMIC_ADD(op, n) __atomic_add_and_fetch (&(op.cnt), n, \ - __ATOMIC_ACQ_REL) -#define GF_ATOMIC_SUB(op, n) __atomic_sub_and_fetch (&(op.cnt), n, \ - __ATOMIC_ACQ_REL) - -#else /* !HAVE_ATOMIC_BUILTINS, but HAVE_SYNC_BUILTINS */ - -/* all macros have a 'gf_atomic_t' as 1st argument */ -#define GF_ATOMIC_INIT(op, n) ({ op.cnt = n; __sync_synchronize (); }) -#define GF_ATOMIC_GET(op) __sync_add_and_fetch (&(op.cnt), 0) -#define GF_ATOMIC_INC(op) __sync_add_and_fetch (&(op.cnt), 1) -#define GF_ATOMIC_DEC(op) __sync_sub_and_fetch (&(op.cnt), 1) -#define GF_ATOMIC_ADD(op, n) __sync_add_and_fetch (&(op.cnt), n) -#define GF_ATOMIC_SUB(op, n) __sync_sub_and_fetch (&(op.cnt), n) - -#endif /* HAVE_ATOMIC_BUILTINS || HAVE_SYNC_BUILTINS */ - -#else /* no HAVE_(ATOMIC|SYNC)_BUILTINS */ -/* fallback implementation, using small inline functions to improve type - * checking while compiling */ - -#include "locking.h" - -typedef struct gf_atomic_t { - int64_t cnt; - gf_lock_t lk; -} gf_atomic_t; - - -static inline void -gf_atomic_init (gf_atomic_t *op, int64_t cnt) -{ - LOCK_INIT (&op->lk); - op->cnt = cnt; -} - - -static inline uint64_t -gf_atomic_get (gf_atomic_t *op) -{ - uint64_t ret; - - LOCK (&op->lk); - { - ret = op->cnt; - } - UNLOCK (&op->lk); - - return ret; -} - - -static inline int64_t -gf_atomic_add (gf_atomic_t *op, int64_t n) -{ - uint64_t ret; - - LOCK (&op->lk); - { - op->cnt += n; - ret = op->cnt; - } - UNLOCK (&op->lk); - - return ret; -} - - -#define GF_ATOMIC_INIT(op, cnt) gf_atomic_init (&op, cnt) -#define GF_ATOMIC_GET(op) gf_atomic_get (&op) -#define GF_ATOMIC_INC(op) gf_atomic_add (&op, 1) -#define GF_ATOMIC_DEC(op) gf_atomic_add (&op, -1) -#define GF_ATOMIC_ADD(op, n) gf_atomic_add (&op, n) -#define GF_ATOMIC_SUB(op, n) gf_atomic_add (&op, -n) - -#endif /* HAVE_ATOMIC_SYNC_OPS */ - -#endif /* _ATOMIC_H */ |