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298 lines
6.8 KiB
298 lines
6.8 KiB
/*
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* Copyright 2010 Samy Al Bahra.
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* All rights reserved.
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*
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef CK_PR_GCC_H
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#define CK_PR_GCC_H
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#ifndef CK_PR_H
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#error Do not include this file directly, use ck_pr.h
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#endif
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#include <ck_cc.h>
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CK_CC_INLINE static void
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ck_pr_barrier(void)
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{
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__asm__ __volatile__("" ::: "memory");
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return;
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}
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#ifndef CK_F_PR
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#define CK_F_PR
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#include <ck_stdbool.h>
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#include <ck_stdint.h>
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/*
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* The following represent supported atomic operations.
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* These operations may be emulated.
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*/
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#include "ck_f_pr.h"
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#define CK_PR_ACCESS(x) (*(volatile __typeof__(x) *)&(x))
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#define CK_PR_LOAD(S, M, T) \
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CK_CC_INLINE static T \
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ck_pr_md_load_##S(const M *target) \
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{ \
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T r; \
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ck_pr_barrier(); \
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r = CK_PR_ACCESS(*(const T *)target); \
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ck_pr_barrier(); \
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return (r); \
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} \
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CK_CC_INLINE static void \
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ck_pr_md_store_##S(M *target, T v) \
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{ \
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ck_pr_barrier(); \
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CK_PR_ACCESS(*(T *)target) = v; \
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ck_pr_barrier(); \
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return; \
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}
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CK_CC_INLINE static void *
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ck_pr_md_load_ptr(const void *target)
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{
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void *r;
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ck_pr_barrier();
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r = CK_CC_DECONST_PTR(*(volatile void *const*)(target));
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ck_pr_barrier();
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return r;
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}
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CK_CC_INLINE static void
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ck_pr_md_store_ptr(void *target, const void *v)
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{
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ck_pr_barrier();
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*(volatile void **)target = CK_CC_DECONST_PTR(v);
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ck_pr_barrier();
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return;
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}
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#define CK_PR_LOAD_S(S, T) CK_PR_LOAD(S, T, T)
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CK_PR_LOAD_S(char, char)
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CK_PR_LOAD_S(uint, unsigned int)
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CK_PR_LOAD_S(int, int)
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#ifndef CK_PR_DISABLE_DOUBLE
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CK_PR_LOAD_S(double, double)
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#endif
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CK_PR_LOAD_S(64, uint64_t)
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CK_PR_LOAD_S(32, uint32_t)
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CK_PR_LOAD_S(16, uint16_t)
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CK_PR_LOAD_S(8, uint8_t)
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#undef CK_PR_LOAD_S
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#undef CK_PR_LOAD
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CK_CC_INLINE static void
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ck_pr_stall(void)
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{
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ck_pr_barrier();
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}
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/*
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* Load and store fences are equivalent to full fences in the GCC port.
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*/
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#define CK_PR_FENCE(T) \
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CK_CC_INLINE static void \
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ck_pr_fence_strict_##T(void) \
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{ \
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__sync_synchronize(); \
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}
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CK_PR_FENCE(atomic)
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CK_PR_FENCE(atomic_atomic)
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CK_PR_FENCE(atomic_load)
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CK_PR_FENCE(atomic_store)
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CK_PR_FENCE(store_atomic)
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CK_PR_FENCE(load_atomic)
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CK_PR_FENCE(load)
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CK_PR_FENCE(load_load)
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CK_PR_FENCE(load_store)
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CK_PR_FENCE(store)
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CK_PR_FENCE(store_store)
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CK_PR_FENCE(store_load)
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CK_PR_FENCE(memory)
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CK_PR_FENCE(acquire)
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CK_PR_FENCE(release)
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CK_PR_FENCE(acqrel)
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CK_PR_FENCE(lock)
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CK_PR_FENCE(unlock)
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#undef CK_PR_FENCE
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/*
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* Atomic compare and swap.
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*/
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#define CK_PR_CAS(S, M, T) \
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CK_CC_INLINE static bool \
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ck_pr_cas_##S(M *target, T compare, T set) \
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{ \
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bool z; \
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z = __sync_bool_compare_and_swap((T *)target, compare, set); \
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return z; \
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}
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CK_PR_CAS(ptr, void, void *)
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#define CK_PR_CAS_S(S, T) CK_PR_CAS(S, T, T)
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CK_PR_CAS_S(char, char)
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CK_PR_CAS_S(int, int)
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CK_PR_CAS_S(uint, unsigned int)
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CK_PR_CAS_S(64, uint64_t)
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CK_PR_CAS_S(32, uint32_t)
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CK_PR_CAS_S(16, uint16_t)
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CK_PR_CAS_S(8, uint8_t)
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#undef CK_PR_CAS_S
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#undef CK_PR_CAS
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/*
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* Compare and swap, set *v to old value of target.
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*/
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CK_CC_INLINE static bool
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ck_pr_cas_ptr_value(void *target, void *compare, void *set, void *v)
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{
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set = __sync_val_compare_and_swap((void **)target, compare, set);
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*(void **)v = set;
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return (set == compare);
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}
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#define CK_PR_CAS_O(S, T) \
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CK_CC_INLINE static bool \
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ck_pr_cas_##S##_value(T *target, T compare, T set, T *v) \
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{ \
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set = __sync_val_compare_and_swap(target, compare, set);\
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*v = set; \
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return (set == compare); \
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}
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CK_PR_CAS_O(char, char)
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CK_PR_CAS_O(int, int)
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CK_PR_CAS_O(uint, unsigned int)
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CK_PR_CAS_O(64, uint64_t)
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CK_PR_CAS_O(32, uint32_t)
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CK_PR_CAS_O(16, uint16_t)
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CK_PR_CAS_O(8, uint8_t)
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#undef CK_PR_CAS_O
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/*
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* Atomic fetch-and-add operations.
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*/
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#define CK_PR_FAA(S, M, T) \
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CK_CC_INLINE static T \
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ck_pr_faa_##S(M *target, T d) \
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{ \
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d = __sync_fetch_and_add((T *)target, d); \
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return (d); \
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}
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CK_PR_FAA(ptr, void, void *)
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#define CK_PR_FAA_S(S, T) CK_PR_FAA(S, T, T)
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CK_PR_FAA_S(char, char)
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CK_PR_FAA_S(uint, unsigned int)
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CK_PR_FAA_S(int, int)
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CK_PR_FAA_S(64, uint64_t)
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CK_PR_FAA_S(32, uint32_t)
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CK_PR_FAA_S(16, uint16_t)
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CK_PR_FAA_S(8, uint8_t)
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#undef CK_PR_FAA_S
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#undef CK_PR_FAA
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/*
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* Atomic store-only binary operations.
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*/
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#define CK_PR_BINARY(K, S, M, T) \
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CK_CC_INLINE static void \
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ck_pr_##K##_##S(M *target, T d) \
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{ \
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d = __sync_fetch_and_##K((T *)target, d); \
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return; \
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}
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#define CK_PR_BINARY_S(K, S, T) CK_PR_BINARY(K, S, T, T)
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#define CK_PR_GENERATE(K) \
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CK_PR_BINARY(K, ptr, void, void *) \
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CK_PR_BINARY_S(K, char, char) \
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CK_PR_BINARY_S(K, int, int) \
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CK_PR_BINARY_S(K, uint, unsigned int) \
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CK_PR_BINARY_S(K, 64, uint64_t) \
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CK_PR_BINARY_S(K, 32, uint32_t) \
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CK_PR_BINARY_S(K, 16, uint16_t) \
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CK_PR_BINARY_S(K, 8, uint8_t)
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CK_PR_GENERATE(add)
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CK_PR_GENERATE(sub)
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CK_PR_GENERATE(and)
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CK_PR_GENERATE(or)
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CK_PR_GENERATE(xor)
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#undef CK_PR_GENERATE
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#undef CK_PR_BINARY_S
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#undef CK_PR_BINARY
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#define CK_PR_UNARY(S, M, T) \
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CK_CC_INLINE static void \
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ck_pr_inc_##S(M *target) \
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{ \
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ck_pr_add_##S(target, (T)1); \
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return; \
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} \
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CK_CC_INLINE static void \
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ck_pr_dec_##S(M *target) \
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{ \
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ck_pr_sub_##S(target, (T)1); \
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return; \
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}
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#define CK_PR_UNARY_S(S, M) CK_PR_UNARY(S, M, M)
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CK_PR_UNARY(ptr, void, void *)
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CK_PR_UNARY_S(char, char)
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CK_PR_UNARY_S(int, int)
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CK_PR_UNARY_S(uint, unsigned int)
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CK_PR_UNARY_S(64, uint64_t)
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CK_PR_UNARY_S(32, uint32_t)
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CK_PR_UNARY_S(16, uint16_t)
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CK_PR_UNARY_S(8, uint8_t)
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#undef CK_PR_UNARY_S
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#undef CK_PR_UNARY
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#endif /* !CK_F_PR */
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#endif /* CK_PR_GCC_H */
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