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/*
* Copyright (C) 2024 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2024 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-common-lib
* Created on: 31 мар. 2020 г.
*
* lsp-common-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* lsp-common-lib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with lsp-common-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_COMMON_ARCH_X86_ATOMIC_H_
#define LSP_PLUG_IN_COMMON_ARCH_X86_ATOMIC_H_
#ifndef LSP_PLUG_IN_COMMON_ATOMIC_IMPL
#error "This file should not be included directly"
#endif /* LSP_PLUG_IN_COMMON_ATOMIC_IMPL */
#define ATOMIC_LOAD_DEF(type, ptrtype, reg) \
inline type atomic_load(ptrtype ptr) \
{ \
type value; \
ARCH_X86_ASM \
( \
__ASM_EMIT("mov (%[ptr]), %[value]") \
: [value] reg (value) \
: [ptr] "r" (ptr) \
: \
); \
return value; \
}
namespace lsp
{
ATOMIC_LOAD_DEF(int8_t, int8_t *, "=&q")
ATOMIC_LOAD_DEF(int8_t, const int8_t *, "=&q")
ATOMIC_LOAD_DEF(uint8_t, uint8_t *, "=&q")
ATOMIC_LOAD_DEF(uint8_t, const uint8_t *, "=&q")
ATOMIC_LOAD_DEF(int16_t, int16_t *, "=&r")
ATOMIC_LOAD_DEF(int16_t, const int16_t *, "=&r")
ATOMIC_LOAD_DEF(uint16_t, uint16_t *, "=&r")
ATOMIC_LOAD_DEF(uint16_t, const uint16_t *, "=&r")
ATOMIC_LOAD_DEF(int32_t, int32_t *, "=&r")
ATOMIC_LOAD_DEF(int32_t, const int32_t *, "=&r")
ATOMIC_LOAD_DEF(uint32_t, uint32_t *, "=&r")
ATOMIC_LOAD_DEF(uint32_t, const uint32_t *, "=&r")
ATOMIC_LOAD_DEF(void *, void **, "=&r")
ATOMIC_LOAD_DEF(void *, void * const *, "=&r")
ATOMIC_LOAD_DEF(const void *, const void **, "=&r")
ATOMIC_LOAD_DEF(const void *, const void * const *, "=&r")
#ifdef ARCH_X86_64
ATOMIC_LOAD_DEF(int64_t, int64_t *, "=&r")
ATOMIC_LOAD_DEF(int64_t, const int64_t *, "=&r")
ATOMIC_LOAD_DEF(uint64_t, uint64_t *, "=&r")
ATOMIC_LOAD_DEF(uint64_t, const uint64_t *, "=&r")
#endif /* ARCH_X86_64 */
} /* namespace lsp */
#undef ATOMIC_LOAD_DEF
#define ATOMIC_STORE_DEF(type, reg) \
inline void atomic_store(type *ptr, type value) \
{ \
ARCH_X86_ASM \
( \
__ASM_EMIT("mov %[value], (%[ptr])") \
: \
: [ptr] "r" (ptr), [value] reg (value) \
: "memory" \
); \
}
namespace lsp
{
ATOMIC_STORE_DEF(int8_t, "q")
ATOMIC_STORE_DEF(uint8_t, "q")
ATOMIC_STORE_DEF(int16_t, "r")
ATOMIC_STORE_DEF(uint16_t, "r")
ATOMIC_STORE_DEF(int32_t, "r")
ATOMIC_STORE_DEF(uint32_t, "r")
ATOMIC_STORE_DEF(void *, "r")
#ifdef ARCH_X86_64
ATOMIC_STORE_DEF(int64_t, "r")
ATOMIC_STORE_DEF(uint64_t, "r")
#endif /* ARCH_X86_64 */
} /* namespace lsp */
#undef ATOMIC_STORE_DEF
#define ATOMIC_XCHG_DEF(type, reg) \
inline type atomic_swap(type *ptr, type value) \
{ \
ARCH_X86_ASM \
( \
__ASM_EMIT("lock") \
__ASM_EMIT("xchg %[value], (%[ptr])") \
: [value] reg (value) \
: [ptr] "r" (ptr) \
: "memory", "cc" \
); \
return value; \
}
namespace lsp
{
ATOMIC_XCHG_DEF(int8_t, "+q")
ATOMIC_XCHG_DEF(uint8_t, "+q")
ATOMIC_XCHG_DEF(int16_t, "+r")
ATOMIC_XCHG_DEF(uint16_t, "+r")
ATOMIC_XCHG_DEF(int32_t, "+r")
ATOMIC_XCHG_DEF(uint32_t, "+r")
ATOMIC_XCHG_DEF(void *, "+r")
#ifdef ARCH_X86_64
ATOMIC_XCHG_DEF(int64_t, "+r")
ATOMIC_XCHG_DEF(uint64_t, "+r")
#endif /* ARCH_X86_64 */
} /* namespace lsp */
#undef ATOMIC_XCHG_DEF
#define ATOMIC_CAS_DEF(type, reg) \
inline bool atomic_cas(type *ptr, type src, type rep) \
{ \
bool res; \
ARCH_X86_ASM \
( \
__ASM_EMIT("cmp %[src], (%[ptr])") \
__ASM_EMIT("jne 2f") \
__ASM_EMIT("lock") \
__ASM_EMIT("cmpxchg %[rep], (%[ptr])") \
__ASM_EMIT("2:") \
: [res] "=@ccz" (res) \
: [src] "a" (src), \
[ptr] reg (ptr), \
[rep] reg (rep) \
: "memory", "cc" \
); \
return res; \
}
namespace lsp
{
ATOMIC_CAS_DEF(int8_t, "q")
ATOMIC_CAS_DEF(uint8_t, "q")
ATOMIC_CAS_DEF(int16_t, "r")
ATOMIC_CAS_DEF(uint16_t, "r")
ATOMIC_CAS_DEF(int32_t, "r")
ATOMIC_CAS_DEF(uint32_t, "r")
ATOMIC_CAS_DEF(void *, "r")
#ifdef ARCH_X86_64
ATOMIC_CAS_DEF(int64_t, "r")
ATOMIC_CAS_DEF(uint64_t, "r")
#endif /* ARCH_X86_64 */
} /* namespace lsp */
#undef ATOMIC_CAS_DEF
#define ATOMIC_ADD_DEF(type, reg) \
inline type atomic_add(type *ptr, type value) \
{ \
ARCH_X86_ASM \
( \
__ASM_EMIT("lock") \
__ASM_EMIT("xadd %[src], (%[ptr])") \
: [src] reg (value) \
: [ptr] "r" (ptr) \
: "memory", "cc" \
); \
return value; \
}
namespace lsp
{
ATOMIC_ADD_DEF(int8_t, "+q")
ATOMIC_ADD_DEF(uint8_t, "+q")
ATOMIC_ADD_DEF(int16_t, "+r")
ATOMIC_ADD_DEF(uint16_t, "+r")
ATOMIC_ADD_DEF(int32_t, "+r")
ATOMIC_ADD_DEF(uint32_t, "+r")
#ifdef ARCH_X86_64
ATOMIC_ADD_DEF(int64_t, "+r")
ATOMIC_ADD_DEF(uint64_t, "+r")
#endif /* ARCH_X86_64 */
} /* namespace lsp */
#undef ATOMIC_ADD_DEF
//-----------------------------------------------------------------------------
// Atomic operations
#define LSP_ATOMIC_UNLOCKED 1
#define LSP_ATOMIC_LOCKED 0
namespace lsp
{
template <class type_t>
inline void atomic_init(type_t &lk) { lk = LSP_ATOMIC_UNLOCKED; }
template <class type_t>
inline type_t atomic_trylock(type_t &lk) { return atomic_swap(&lk, LSP_ATOMIC_LOCKED); }
template <class type_t>
inline type_t atomic_unlock(type_t &lk) { return atomic_swap(&lk, LSP_ATOMIC_UNLOCKED); }
} /* namespace lsp */
#endif /* LSP_PLUG_IN_COMMON_ARCH_X86_ATOMIC_H_ */
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