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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_ARM_ATOMIC_LEGACY_H_
#define LSP_PLUG_IN_COMMON_ARCH_ARM_ATOMIC_LEGACY_H_
#ifndef LSP_PLUG_IN_COMMON_ATOMIC_IMPL
#error "This file should not be included directly"
#endif /* LSP_PLUG_IN_COMMON_ATOMIC_IMPL */
namespace lsp
{
extern uint32_t atomic_lock_barrier;
} /* namespace lsp */
#define ATOMIC_LOAD_DEF(type, cmd) \
inline type atomic_load(type *ptr) \
{ \
type retval; \
ARCH_ARM_ASM( \
__ASM_EMIT(cmd " %[ret], [%[ptr]]") \
: [ret] "=&r" (retval) \
: [ptr] "r" (ptr) \
: "memory" \
); \
return retval; \
}
namespace lsp
{
ATOMIC_LOAD_DEF(int8_t, "ldrb")
ATOMIC_LOAD_DEF(uint8_t, "ldrb")
ATOMIC_LOAD_DEF(int16_t, "ldrh")
ATOMIC_LOAD_DEF(uint16_t, "ldrh")
ATOMIC_LOAD_DEF(int32_t, "ldr")
ATOMIC_LOAD_DEF(uint32_t, "ldr")
ATOMIC_LOAD_DEF(void *, "ldr")
} /* namespace lsp */
#undef ATOMIC_LOAD_DEF
#define ATOMIC_STORE_DEF(type, cmd) \
inline void atomic_store(type *ptr, type value) \
{ \
ARCH_ARM_ASM( \
__ASM_EMIT(cmd " %[value], [%[ptr]]") \
: \
: [ptr] "r" (ptr), [value] "r" (value) \
: "memory" \
); \
}
namespace lsp
{
ATOMIC_STORE_DEF(int8_t, "strb")
ATOMIC_STORE_DEF(uint8_t, "strb")
ATOMIC_STORE_DEF(int16_t, "strh")
ATOMIC_STORE_DEF(uint16_t, "strh")
ATOMIC_STORE_DEF(int32_t, "str")
ATOMIC_STORE_DEF(uint32_t, "str")
ATOMIC_STORE_DEF(void *, "str")
} /* namespace lsp */
#undef ATOMIC_STORE_DEF
#define ATOMIC_SWAP_DEF(type, cmd) \
inline type atomic_swap(type *ptr, type value) \
{ \
type retval; \
ARCH_ARM_ASM( \
__ASM_EMIT(cmd " %[ret], %[src], [%[ptr]]") \
: [ret] "=&r" (retval) \
: [ptr] "r" (ptr), \
[src] "r" (value) \
: "memory" \
); \
return retval; \
}
#define ATOMIC_SWAP_DEF2(type) \
inline type atomic_swap(type *ptr, type value) \
{ \
while (atomic_swap(&atomic_lock_barrier, 1)) /* nothing */ ; \
type retval = *ptr; \
*ptr = value; \
atomic_swap(&atomic_lock_barrier, 0); \
return retval; \
}
#define ATOMIC_SWAP_DEF3(type) \
inline type atomic_swap(type *ptr, type value) \
{ \
while (atomic_swap(&atomic_lock_barrier, 1)) /* nothing */ ; \
type retval = *ptr; \
*ptr = value; \
atomic_swap(&atomic_lock_barrier, 0); \
return retval; \
}
namespace lsp
{
ATOMIC_SWAP_DEF(int8_t, "swpb")
ATOMIC_SWAP_DEF(uint8_t, "swpb")
ATOMIC_SWAP_DEF(int32_t, "swp")
ATOMIC_SWAP_DEF(uint32_t, "swp")
ATOMIC_SWAP_DEF2(int16_t)
ATOMIC_SWAP_DEF2(uint16_t)
ATOMIC_SWAP_DEF3(void *)
} /* namespace lsp */
#undef ATOMIC_SWAP_DEF
#undef ATOMIC_SWAP_DEF2
#undef ATOMIC_SWAP_DEF3
#define ATOMIC_CAS_DEF(type) \
inline bool atomic_cas(type *ptr, type exp, type rep) \
{ \
if (!atomic_swap(&atomic_lock_barrier, 1)) \
return false; \
if (*ptr == exp) \
{ \
*ptr = rep; \
atomic_swap(&atomic_lock_barrier, 0); \
return true; \
} \
\
atomic_swap(&atomic_lock_barrier, 0); \
return false; \
}
namespace lsp
{
ATOMIC_CAS_DEF(int8_t)
ATOMIC_CAS_DEF(uint8_t)
ATOMIC_CAS_DEF(int16_t)
ATOMIC_CAS_DEF(uint16_t)
ATOMIC_CAS_DEF(int32_t)
ATOMIC_CAS_DEF(uint32_t)
ATOMIC_CAS_DEF(void *)
} /* namespace lsp */
#undef ATOMIC_CAS_DEF
#define ATOMIC_ADD_DEF(type) \
inline type atomic_add(type *ptr, type value) \
{ \
while (atomic_swap(&atomic_lock_barrier, 1)) /* nothing */ ; \
type retval = *ptr; \
*ptr = retval + value; \
atomic_swap(&atomic_lock_barrier, 0); \
return retval; \
}
namespace lsp
{
ATOMIC_ADD_DEF(int8_t)
ATOMIC_ADD_DEF(uint8_t)
ATOMIC_ADD_DEF(int16_t)
ATOMIC_ADD_DEF(uint16_t)
ATOMIC_ADD_DEF(int32_t)
ATOMIC_ADD_DEF(uint32_t)
} /* 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_ARM_ATOMIC_LEGACY_H_ */
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