/*
* Copyright 2010 Samy Al Bahra.
* 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.
*/
#ifndef CK_PR_GCC_H
#define CK_PR_GCC_H
#ifndef CK_PR_H
#error Do not include this file directly, use ck_pr.h
#endif
#include <ck_cc.h>
CK_CC_INLINE static void
ck_pr_barrier(void)
{
__asm__ __volatile__("" ::: "memory");
return;
}
#ifndef CK_F_PR
#define CK_F_PR
#include <ck_stdbool.h>
#include <ck_stdint.h>
/*
* The following represent supported atomic operations.
* These operations may be emulated.
*/
#include "ck_f_pr.h"
#define CK_PR_ACCESS(x) (*(volatile __typeof__(x) *)&(x))
#define CK_PR_LOAD(S, M, T) \
CK_CC_INLINE static T \
ck_pr_md_load_##S(const M *target) \
{ \
T r; \
ck_pr_barrier(); \
r = CK_PR_ACCESS(*(const T *)target); \
ck_pr_barrier(); \
return (r); \
} \
CK_CC_INLINE static void \
ck_pr_md_store_##S(M *target, T v) \
{ \
ck_pr_barrier(); \
CK_PR_ACCESS(*(T *)target) = v; \
ck_pr_barrier(); \
return; \
}
CK_CC_INLINE static void *
ck_pr_md_load_ptr(const void *target)
{
void *r;
ck_pr_barrier();
r = CK_CC_DECONST_PTR(*(volatile void *const*)(target));
ck_pr_barrier();
return r;
}
CK_CC_INLINE static void
ck_pr_md_store_ptr(void *target, const void *v)
{
ck_pr_barrier();
*(volatile void **)target = CK_CC_DECONST_PTR(v);
ck_pr_barrier();
return;
}
#define CK_PR_LOAD_S(S, T) CK_PR_LOAD(S, T, T)
CK_PR_LOAD_S(char, char)
CK_PR_LOAD_S(uint, unsigned int)
CK_PR_LOAD_S(int, int)
#ifndef CK_PR_DISABLE_DOUBLE
CK_PR_LOAD_S(double, double)
#endif
CK_PR_LOAD_S(64, uint64_t)
CK_PR_LOAD_S(32, uint32_t)
CK_PR_LOAD_S(16, uint16_t)
CK_PR_LOAD_S(8, uint8_t)
#undef CK_PR_LOAD_S
#undef CK_PR_LOAD
CK_CC_INLINE static void
ck_pr_stall(void)
{
ck_pr_barrier();
}
/*
* Load and store fences are equivalent to full fences in the GCC port.
*/
#define CK_PR_FENCE(T) \
CK_CC_INLINE static void \
ck_pr_fence_strict_##T(void) \
{ \
__atomic_thread_fence(__ATOMIC_SEQ_CST);\
}
CK_PR_FENCE(atomic)
CK_PR_FENCE(atomic_atomic)
CK_PR_FENCE(atomic_load)
CK_PR_FENCE(atomic_store)
CK_PR_FENCE(store_atomic)
CK_PR_FENCE(load_atomic)
CK_PR_FENCE(load)
CK_PR_FENCE(load_load)
CK_PR_FENCE(load_store)
CK_PR_FENCE(store)
CK_PR_FENCE(store_store)
CK_PR_FENCE(store_load)
CK_PR_FENCE(memory)
CK_PR_FENCE(acquire)
CK_PR_FENCE(release)
CK_PR_FENCE(acqrel)
CK_PR_FENCE(lock)
CK_PR_FENCE(unlock)
#undef CK_PR_FENCE
/*
* Atomic compare and swap.
*/
#define CK_PR_CAS(S, M, T) \
CK_CC_INLINE static bool \
ck_pr_cas_##S(M *target, T compare, T set) \
{ \
bool z; \
z = __atomic_compare_exchange_n((T *)target, &compare, set, \
false, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); \
return z; \
}
CK_PR_CAS(ptr, void, void *)
#define CK_PR_CAS_S(S, T) CK_PR_CAS(S, T, T)
CK_PR_CAS_S(char, char)
CK_PR_CAS_S(int, int)
CK_PR_CAS_S(uint, unsigned int)
CK_PR_CAS_S(64, uint64_t)
CK_PR_CAS_S(32, uint32_t)
CK_PR_CAS_S(16, uint16_t)
CK_PR_CAS_S(8, uint8_t)
#undef CK_PR_CAS_S
#undef CK_PR_CAS
/*
* Compare and swap, set *v to old value of target.
*/
CK_CC_INLINE static bool
ck_pr_cas_ptr_value(void *target, void *compare, void *set, void *v)
{
*(void **)v = compare;
return __atomic_compare_exchange_n((void **)target, v, set, false,
__ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
}
#define CK_PR_CAS_O(S, T) \
CK_CC_INLINE static bool \
ck_pr_cas_##S##_value(T *target, T compare, T set, T *v) \
{ \
*v = compare; \
return __atomic_compare_exchange_n(target, v, set, \
false, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); \
}
CK_PR_CAS_O(char, char)
CK_PR_CAS_O(int, int)
CK_PR_CAS_O(uint, unsigned int)
CK_PR_CAS_O(64, uint64_t)
CK_PR_CAS_O(32, uint32_t)
CK_PR_CAS_O(16, uint16_t)
CK_PR_CAS_O(8, uint8_t)
#undef CK_PR_CAS_O
/*
* Atomic fetch-and-add operations.
*/
#define CK_PR_FAA(S, M, T) \
CK_CC_INLINE static T \
ck_pr_faa_##S(M *target, T d) \
{ \
d = __atomic_fetch_add((T *)target, d, \
__ATOMIC_SEQ_CST); \
return (d); \
}
CK_PR_FAA(ptr, void, void *)
#define CK_PR_FAA_S(S, T) CK_PR_FAA(S, T, T)
CK_PR_FAA_S(char, char)
CK_PR_FAA_S(uint, unsigned int)
CK_PR_FAA_S(int, int)
CK_PR_FAA_S(64, uint64_t)
CK_PR_FAA_S(32, uint32_t)
CK_PR_FAA_S(16, uint16_t)
CK_PR_FAA_S(8, uint8_t)
#undef CK_PR_FAA_S
#undef CK_PR_FAA
/*
* Atomic store-only binary operations.
*/
#define CK_PR_BINARY(K, S, M, T) \
CK_CC_INLINE static void \
ck_pr_##K##_##S(M *target, T d) \
{ \
d = __atomic_fetch_##K((T *)target, d, \
__ATOMIC_SEQ_CST); \
return; \
}
#define CK_PR_BINARY_S(K, S, T) CK_PR_BINARY(K, S, T, T)
#define CK_PR_GENERATE(K) \
CK_PR_BINARY(K, ptr, void, void *) \
CK_PR_BINARY_S(K, char, char) \
CK_PR_BINARY_S(K, int, int) \
CK_PR_BINARY_S(K, uint, unsigned int) \
CK_PR_BINARY_S(K, 64, uint64_t) \
CK_PR_BINARY_S(K, 32, uint32_t) \
CK_PR_BINARY_S(K, 16, uint16_t) \
CK_PR_BINARY_S(K, 8, uint8_t)
CK_PR_GENERATE(add)
CK_PR_GENERATE(sub)
CK_PR_GENERATE(and)
CK_PR_GENERATE(or)
CK_PR_GENERATE(xor)
#undef CK_PR_GENERATE
#undef CK_PR_BINARY_S
#undef CK_PR_BINARY
#define CK_PR_UNARY(S, M, T) \
CK_CC_INLINE static void \
ck_pr_inc_##S(M *target) \
{ \
ck_pr_add_##S(target, (T)1); \
return; \
} \
CK_CC_INLINE static void \
ck_pr_dec_##S(M *target) \
{ \
ck_pr_sub_##S(target, (T)1); \
return; \
}
#define CK_PR_UNARY_S(S, M) CK_PR_UNARY(S, M, M)
CK_PR_UNARY(ptr, void, void *)
CK_PR_UNARY_S(char, char)
CK_PR_UNARY_S(int, int)
CK_PR_UNARY_S(uint, unsigned int)
CK_PR_UNARY_S(64, uint64_t)
CK_PR_UNARY_S(32, uint32_t)
CK_PR_UNARY_S(16, uint16_t)
CK_PR_UNARY_S(8, uint8_t)
#undef CK_PR_UNARY_S
#undef CK_PR_UNARY
#endif /* !CK_F_PR */
#endif /* CK_PR_GCC_H */
