diff options
Diffstat (limited to '3rdparty/libuv/src/unix/spinlock.h')
-rw-r--r-- | 3rdparty/libuv/src/unix/spinlock.h | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/3rdparty/libuv/src/unix/spinlock.h b/3rdparty/libuv/src/unix/spinlock.h deleted file mode 100644 index a20c83cc601..00000000000 --- a/3rdparty/libuv/src/unix/spinlock.h +++ /dev/null @@ -1,53 +0,0 @@ -/* Copyright (c) 2013, Ben Noordhuis <info@bnoordhuis.nl> - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ - -#ifndef UV_SPINLOCK_H_ -#define UV_SPINLOCK_H_ - -#include "internal.h" /* ACCESS_ONCE, UV_UNUSED */ -#include "atomic-ops.h" - -#define UV_SPINLOCK_INITIALIZER { 0 } - -typedef struct { - int lock; -} uv_spinlock_t; - -UV_UNUSED(static void uv_spinlock_init(uv_spinlock_t* spinlock)); -UV_UNUSED(static void uv_spinlock_lock(uv_spinlock_t* spinlock)); -UV_UNUSED(static void uv_spinlock_unlock(uv_spinlock_t* spinlock)); -UV_UNUSED(static int uv_spinlock_trylock(uv_spinlock_t* spinlock)); - -UV_UNUSED(static void uv_spinlock_init(uv_spinlock_t* spinlock)) { - ACCESS_ONCE(int, spinlock->lock) = 0; -} - -UV_UNUSED(static void uv_spinlock_lock(uv_spinlock_t* spinlock)) { - while (!uv_spinlock_trylock(spinlock)) cpu_relax(); -} - -UV_UNUSED(static void uv_spinlock_unlock(uv_spinlock_t* spinlock)) { - ACCESS_ONCE(int, spinlock->lock) = 0; -} - -UV_UNUSED(static int uv_spinlock_trylock(uv_spinlock_t* spinlock)) { - /* TODO(bnoordhuis) Maybe change to a ticket lock to guarantee fair queueing. - * Not really critical until we have locks that are (frequently) contended - * for by several threads. - */ - return 0 == cmpxchgi(&spinlock->lock, 0, 1); -} - -#endif /* UV_SPINLOCK_H_ */ |