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/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 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_XCHG_DEF(type, extra) \
inline type atomic_swap(extra type *ptr, type value)\
{ \
ARCH_X86_ASM \
( \
__ASM_EMIT("lock") \
__ASM_EMIT("xchg %[value], (%[ptr])") \
: [value] "+r"(value) \
: [ptr] "r" (ptr) \
: "memory", "cc" \
); \
return value; \
}
namespace lsp
{
ATOMIC_XCHG_DEF(int8_t, )
ATOMIC_XCHG_DEF(int8_t, volatile)
ATOMIC_XCHG_DEF(uint8_t, )
ATOMIC_XCHG_DEF(uint8_t, volatile)
ATOMIC_XCHG_DEF(int16_t, )
ATOMIC_XCHG_DEF(int16_t, volatile)
ATOMIC_XCHG_DEF(uint16_t, )
ATOMIC_XCHG_DEF(uint16_t, volatile)
ATOMIC_XCHG_DEF(int32_t, )
ATOMIC_XCHG_DEF(int32_t, volatile)
ATOMIC_XCHG_DEF(uint32_t, )
ATOMIC_XCHG_DEF(uint32_t, volatile)
ATOMIC_XCHG_DEF(void *, )
ATOMIC_XCHG_DEF(void *, volatile)
#ifdef ARCH_X86_64
ATOMIC_XCHG_DEF(int64_t, )
ATOMIC_XCHG_DEF(int64_t, volatile)
ATOMIC_XCHG_DEF(uint64_t, )
ATOMIC_XCHG_DEF(uint64_t, volatile)
#endif /* ARCH_X86_64 */
}
#undef ATOMIC_XCHG_DEF
#define ATOMIC_CAS_DEF(type, extra) \
inline bool atomic_cas(extra 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:") \
__ASM_EMIT("setz %[res]") \
: [res] "=a" (res) \
: [src] "a" (src), \
[ptr] "r" (ptr), \
[rep] "r" (rep) \
: "memory", "cc" \
); \
return res; \
}
namespace lsp
{
ATOMIC_CAS_DEF(int8_t, )
ATOMIC_CAS_DEF(int8_t, volatile)
ATOMIC_CAS_DEF(uint8_t, )
ATOMIC_CAS_DEF(uint8_t, volatile)
ATOMIC_CAS_DEF(int16_t, )
ATOMIC_CAS_DEF(int16_t, volatile)
ATOMIC_CAS_DEF(uint16_t, )
ATOMIC_CAS_DEF(uint16_t, volatile)
ATOMIC_CAS_DEF(int32_t, )
ATOMIC_CAS_DEF(int32_t, volatile)
ATOMIC_CAS_DEF(uint32_t, )
ATOMIC_CAS_DEF(uint32_t, volatile)
ATOMIC_CAS_DEF(void *, )
ATOMIC_CAS_DEF(void *, volatile)
#ifdef ARCH_X86_64
ATOMIC_CAS_DEF(int64_t, )
ATOMIC_CAS_DEF(int64_t, volatile)
ATOMIC_CAS_DEF(uint64_t, )
ATOMIC_CAS_DEF(uint64_t, volatile)
#endif /* ARCH_X86_64 */
}
#undef ATOMIC_CAS_DEF
#define ATOMIC_ADD_DEF(type, extra) \
inline type atomic_add(extra type *ptr, type value) \
{ \
ARCH_X86_ASM \
( \
__ASM_EMIT("lock") \
__ASM_EMIT("xadd %[src], (%[ptr])") \
: [src] "+r" (value) \
: [ptr] "r" (ptr) \
: "memory", "cc" \
); \
return value; \
}
namespace lsp
{
ATOMIC_ADD_DEF(int8_t, )
ATOMIC_ADD_DEF(int8_t, volatile)
ATOMIC_ADD_DEF(uint8_t, )
ATOMIC_ADD_DEF(uint8_t, volatile)
ATOMIC_ADD_DEF(int16_t, )
ATOMIC_ADD_DEF(int16_t, volatile)
ATOMIC_ADD_DEF(uint16_t, )
ATOMIC_ADD_DEF(uint16_t, volatile)
ATOMIC_ADD_DEF(int32_t, )
ATOMIC_ADD_DEF(int32_t, volatile)
ATOMIC_ADD_DEF(uint32_t, )
ATOMIC_ADD_DEF(uint32_t, volatile)
#ifdef ARCH_X86_64
ATOMIC_ADD_DEF(int64_t, )
ATOMIC_ADD_DEF(int64_t, volatile)
ATOMIC_ADD_DEF(uint64_t, )
ATOMIC_ADD_DEF(uint64_t, volatile)
#endif /* ARCH_X86_64 */
}
#undef ATOMIC_ADD_DEF
//-----------------------------------------------------------------------------
// Atomic operations
namespace lsp
{
template <class type_t>
inline void atomic_init(type_t &lk) { lk = 1; }
template <class type_t>
inline type_t atomic_trylock(type_t &lk) { return atomic_swap(&lk, 0); }
template <class type_t>
inline type_t atomic_unlock(type_t &lk) { return atomic_swap(&lk, 1); }
}
#endif /* LSP_PLUG_IN_COMMON_ARCH_X86_ATOMIC_H_ */
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