cbfd2a8e62
For now assume sizeof(int) == 4 for all supported platforms, could be changed in the future. Added an assert to functions which depends on this this, so we'll easily notice bad things happening.
308 lines
8.1 KiB
C
308 lines
8.1 KiB
C
/*
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* Adopted from jemalloc with this license:
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*
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* Copyright (C) 2002-2013 Jason Evans <jasone@canonware.com>.
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* All rights reserved.
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* Copyright (C) 2007-2012 Mozilla Foundation. All rights reserved.
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* Copyright (C) 2009-2013 Facebook, Inc. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice(s),
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice(s),
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef ATOMIC_OPS_H__
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#define ATOMIC_OPS_H__
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#include <assert.h>
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#if defined (__APPLE__)
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# include <libkern/OSAtomic.h>
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#elif defined(_MSC_VER)
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# include <windows.h>
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#endif
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/* needed for int types */
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#include "../../source/blender/blenlib/BLI_sys_types.h"
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/* little macro so inline keyword works */
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#if defined(_MSC_VER)
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# define ATOMIC_INLINE static __forceinline
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#else
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# if (defined(__APPLE__) && defined(__ppc__))
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/* static inline __attribute__ here breaks osx ppc gcc42 build */
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# define ATOMIC_INLINE static __attribute__((always_inline))
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# else
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# define ATOMIC_INLINE static inline __attribute__((always_inline))
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# endif
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#endif
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#if defined(_M_X64) || defined(__amd64__) || defined(__x86_64__)
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# define LG_SIZEOF_PTR 3
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# define LG_SIZEOF_INT 2
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#else
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# define LG_SIZEOF_PTR 2
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# define LG_SIZEOF_INT 2
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#endif
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/******************************************************************************/
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/* 64-bit operations. */
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#if (LG_SIZEOF_PTR == 3 || LG_SIZEOF_INT == 3)
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# ifdef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8
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ATOMIC_INLINE uint64_t
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atomic_add_uint64(uint64_t *p, uint64_t x)
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{
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return (__sync_add_and_fetch(p, x));
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}
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ATOMIC_INLINE uint64_t
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atomic_sub_uint64(uint64_t *p, uint64_t x)
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{
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return (__sync_sub_and_fetch(p, x));
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}
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#elif (defined(_MSC_VER))
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ATOMIC_INLINE uint64_t
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atomic_add_uint64(uint64_t *p, uint64_t x)
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{
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return (InterlockedExchangeAdd64(p, x));
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}
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ATOMIC_INLINE uint64_t
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atomic_sub_uint64(uint64_t *p, uint64_t x)
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{
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return (InterlockedExchangeAdd64(p, -((int64_t)x)));
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}
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#elif (defined(__APPLE__))
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ATOMIC_INLINE uint64_t
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atomic_add_uint64(uint64_t *p, uint64_t x)
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{
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return (OSAtomicAdd64((int64_t)x, (int64_t *)p));
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}
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ATOMIC_INLINE uint64_t
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atomic_sub_uint64(uint64_t *p, uint64_t x)
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{
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return (OSAtomicAdd64(-((int64_t)x), (int64_t *)p));
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}
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# elif (defined(__amd64__) || defined(__x86_64__))
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ATOMIC_INLINE uint64_t
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atomic_add_uint64(uint64_t *p, uint64_t x)
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{
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asm volatile (
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"lock; xaddq %0, %1;"
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: "+r" (x), "=m" (*p) /* Outputs. */
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: "m" (*p) /* Inputs. */
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);
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return (x);
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}
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ATOMIC_INLINE uint64_t
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atomic_sub_uint64(uint64_t *p, uint64_t x)
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{
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x = (uint64_t)(-(int64_t)x);
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asm volatile (
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"lock; xaddq %0, %1;"
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: "+r" (x), "=m" (*p) /* Outputs. */
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: "m" (*p) /* Inputs. */
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);
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return (x);
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}
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# elif (defined(JEMALLOC_ATOMIC9))
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ATOMIC_INLINE uint64_t
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atomic_add_uint64(uint64_t *p, uint64_t x)
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{
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/*
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* atomic_fetchadd_64() doesn't exist, but we only ever use this
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* function on LP64 systems, so atomic_fetchadd_long() will do.
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*/
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assert(sizeof(uint64_t) == sizeof(unsigned long));
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return (atomic_fetchadd_long(p, (unsigned long)x) + x);
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}
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ATOMIC_INLINE uint64_t
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atomic_sub_uint64(uint64_t *p, uint64_t x)
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{
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assert(sizeof(uint64_t) == sizeof(unsigned long));
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return (atomic_fetchadd_long(p, (unsigned long)(-(long)x)) - x);
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}
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# elif (defined(JE_FORCE_SYNC_COMPARE_AND_SWAP_8))
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ATOMIC_INLINE uint64_t
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atomic_add_uint64(uint64_t *p, uint64_t x)
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{
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return (__sync_add_and_fetch(p, x));
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}
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ATOMIC_INLINE uint64_t
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atomic_sub_uint64(uint64_t *p, uint64_t x)
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{
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return (__sync_sub_and_fetch(p, x));
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}
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# else
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# error "Missing implementation for 64-bit atomic operations"
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# endif
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#endif
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/******************************************************************************/
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/* 32-bit operations. */
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#ifdef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
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ATOMIC_INLINE uint32_t
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atomic_add_uint32(uint32_t *p, uint32_t x)
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{
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return (__sync_add_and_fetch(p, x));
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}
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ATOMIC_INLINE uint32_t
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atomic_sub_uint32(uint32_t *p, uint32_t x)
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{
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return (__sync_sub_and_fetch(p, x));
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}
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#elif (defined(_MSC_VER))
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ATOMIC_INLINE uint32_t
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atomic_add_uint32(uint32_t *p, uint32_t x)
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{
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return (InterlockedExchangeAdd(p, x));
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}
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ATOMIC_INLINE uint32_t
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atomic_sub_uint32(uint32_t *p, uint32_t x)
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{
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return (InterlockedExchangeAdd(p, -((int32_t)x)));
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}
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#elif (defined(__APPLE__))
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ATOMIC_INLINE uint32_t
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atomic_add_uint32(uint32_t *p, uint32_t x)
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{
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return (OSAtomicAdd32((int32_t)x, (int32_t *)p));
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}
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ATOMIC_INLINE uint32_t
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atomic_sub_uint32(uint32_t *p, uint32_t x)
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{
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return (OSAtomicAdd32(-((int32_t)x), (int32_t *)p));
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}
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#elif (defined(__i386__) || defined(__amd64__) || defined(__x86_64__))
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ATOMIC_INLINE uint32_t
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atomic_add_uint32(uint32_t *p, uint32_t x)
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{
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asm volatile (
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"lock; xaddl %0, %1;"
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: "+r" (x), "=m" (*p) /* Outputs. */
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: "m" (*p) /* Inputs. */
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);
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return (x);
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}
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ATOMIC_INLINE uint32_t
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atomic_sub_uint32(uint32_t *p, uint32_t x)
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{
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x = (uint32_t)(-(int32_t)x);
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asm volatile (
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"lock; xaddl %0, %1;"
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: "+r" (x), "=m" (*p) /* Outputs. */
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: "m" (*p) /* Inputs. */
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);
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return (x);
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}
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#elif (defined(JEMALLOC_ATOMIC9))
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ATOMIC_INLINE uint32_t
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atomic_add_uint32(uint32_t *p, uint32_t x)
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{
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return (atomic_fetchadd_32(p, x) + x);
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}
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ATOMIC_INLINE uint32_t
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atomic_sub_uint32(uint32_t *p, uint32_t x)
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{
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return (atomic_fetchadd_32(p, (uint32_t)(-(int32_t)x)) - x);
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}
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#elif (defined(JE_FORCE_SYNC_COMPARE_AND_SWAP_4))
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ATOMIC_INLINE uint32_t
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atomic_add_uint32(uint32_t *p, uint32_t x)
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{
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return (__sync_add_and_fetch(p, x));
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}
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ATOMIC_INLINE uint32_t
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atomic_sub_uint32(uint32_t *p, uint32_t x)
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{
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return (__sync_sub_and_fetch(p, x));
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}
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#else
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# error "Missing implementation for 32-bit atomic operations"
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#endif
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/******************************************************************************/
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/* size_t operations. */
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ATOMIC_INLINE size_t
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atomic_add_z(size_t *p, size_t x)
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{
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assert(sizeof(size_t) == 1 << LG_SIZEOF_PTR);
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#if (LG_SIZEOF_PTR == 3)
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return ((size_t)atomic_add_uint64((uint64_t *)p, (uint64_t)x));
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#elif (LG_SIZEOF_PTR == 2)
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return ((size_t)atomic_add_uint32((uint32_t *)p, (uint32_t)x));
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#endif
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}
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ATOMIC_INLINE size_t
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atomic_sub_z(size_t *p, size_t x)
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{
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assert(sizeof(size_t) == 1 << LG_SIZEOF_PTR);
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#if (LG_SIZEOF_PTR == 3)
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return ((size_t)atomic_add_uint64((uint64_t *)p,
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(uint64_t)-((int64_t)x)));
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#elif (LG_SIZEOF_PTR == 2)
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return ((size_t)atomic_add_uint32((uint32_t *)p,
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(uint32_t)-((int32_t)x)));
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#endif
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}
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/******************************************************************************/
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/* unsigned operations. */
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ATOMIC_INLINE unsigned
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atomic_add_u(unsigned *p, unsigned x)
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{
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assert(sizeof(unsigned) == 1 << LG_SIZEOF_INT);
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#if (LG_SIZEOF_INT == 3)
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return ((unsigned)atomic_add_uint64((uint64_t *)p, (uint64_t)x));
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#elif (LG_SIZEOF_INT == 2)
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return ((unsigned)atomic_add_uint32((uint32_t *)p, (uint32_t)x));
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#endif
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}
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ATOMIC_INLINE unsigned
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atomic_sub_u(unsigned *p, unsigned x)
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{
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assert(sizeof(unsigned) == 1 << LG_SIZEOF_INT);
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#if (LG_SIZEOF_INT == 3)
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return ((unsigned)atomic_add_uint64((uint64_t *)p,
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(uint64_t)-((int64_t)x)));
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#elif (LG_SIZEOF_INT == 2)
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return ((unsigned)atomic_add_uint32((uint32_t *)p,
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(uint32_t)-((int32_t)x)));
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#endif
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}
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#endif /* ATOMIC_OPS_H__ */
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