diff options
Diffstat (limited to 'third-party/libuv/src/unix/atomic-ops.h')
-rw-r--r-- | third-party/libuv/src/unix/atomic-ops.h | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/third-party/libuv/src/unix/atomic-ops.h b/third-party/libuv/src/unix/atomic-ops.h deleted file mode 100644 index 7e4e64beda..0000000000 --- a/third-party/libuv/src/unix/atomic-ops.h +++ /dev/null @@ -1,60 +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_ATOMIC_OPS_H_ -#define UV_ATOMIC_OPS_H_ - -#include "internal.h" /* UV_UNUSED */ - -UV_UNUSED(static int cmpxchgi(int* ptr, int oldval, int newval)); -UV_UNUSED(static long cmpxchgl(long* ptr, long oldval, long newval)); -UV_UNUSED(static void cpu_relax(void)); - -/* Prefer hand-rolled assembly over the gcc builtins because the latter also - * issue full memory barriers. - */ -UV_UNUSED(static int cmpxchgi(int* ptr, int oldval, int newval)) { -#if defined(__i386__) || defined(__x86_64__) - int out; - __asm__ __volatile__ ("lock; cmpxchg %2, %1;" - : "=a" (out), "+m" (*(volatile int*) ptr) - : "r" (newval), "0" (oldval) - : "memory"); - return out; -#else - return __sync_val_compare_and_swap(ptr, oldval, newval); -#endif -} - -UV_UNUSED(static long cmpxchgl(long* ptr, long oldval, long newval)) { -#if defined(__i386__) || defined(__x86_64__) - long out; - __asm__ __volatile__ ("lock; cmpxchg %2, %1;" - : "=a" (out), "+m" (*(volatile long*) ptr) - : "r" (newval), "0" (oldval) - : "memory"); - return out; -#else - return __sync_val_compare_and_swap(ptr, oldval, newval); -#endif -} - -UV_UNUSED(static void cpu_relax(void)) { -#if defined(__i386__) || defined(__x86_64__) - __asm__ __volatile__ ("rep; nop"); /* a.k.a. PAUSE */ -#endif -} - -#endif /* UV_ATOMIC_OPS_H_ */ |