diff options
| -rw-r--r-- | tools/build/Makefile | 4 | ||||
| -rw-r--r-- | tools/build/atomic.c | 56 |
2 files changed, 60 insertions, 0 deletions
diff --git a/tools/build/Makefile b/tools/build/Makefile index 8e26c29..4eb7548 100644 --- a/tools/build/Makefile +++ b/tools/build/Makefile @@ -7,6 +7,10 @@ SRCS= INCSGROUPS= INCS INCS= +.if ${MACHINE_ARCH} == i386 +SRCS+= atomic.c +.endif + BOOTSTRAPPING?= 0 .if empty(SRCS) diff --git a/tools/build/atomic.c b/tools/build/atomic.c new file mode 100644 index 0000000..72eef9f --- /dev/null +++ b/tools/build/atomic.c @@ -0,0 +1,56 @@ +/*- + * Copyright (c) 2011 Marcel Moolenaar + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <stdint.h> + +uint32_t __sync_add_and_fetch_4(uint32_t *, uint32_t); +uint32_t __sync_sub_and_fetch_4(uint32_t *, uint32_t); +uint32_t __sync_val_compare_and_swap_4(uint32_t *, uint32_t, uint32_t); + +uint32_t +__sync_add_and_fetch_4(uint32_t *ptr, uint32_t val) +{ + *ptr += val; + return *ptr; +} + +uint32_t +__sync_sub_and_fetch_4(uint32_t *ptr, uint32_t val) +{ + *ptr -= val; + return *ptr; +} + +uint32_t +__sync_val_compare_and_swap_4(uint32_t *ptr, uint32_t oldval, uint32_t newval) +{ + uint32_t res = *ptr; + if (res == oldval) + *ptr = newval; + return res; +} |
