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112 lines
3.6 KiB
C
112 lines
3.6 KiB
C
/*
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* SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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//replacement for gcc built-in functions
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#include <stdbool.h>
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#include <stdint.h>
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#include <string.h>
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#include "esp_stdatomic.h"
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#include "freertos/FreeRTOS.h"
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#include "sdkconfig.h"
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#if SOC_CPU_CORES_NUM > 1
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#if !CONFIG_STDATOMIC_S32C1I_SPIRAM_WORKAROUND
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_Static_assert(HAS_ATOMICS_32, "32-bit atomics should be supported if SOC_CPU_CORES_NUM > 1");
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#endif // CONFIG_STDATOMIC_S32C1I_SPIRAM_WORKAROUND
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// Only need to implement 64-bit atomics here. Use a single global portMUX_TYPE spinlock
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// to emulate the atomics.
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static portMUX_TYPE s_atomic_lock = portMUX_INITIALIZER_UNLOCKED;
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#endif
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#if !HAS_ATOMICS_32
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_Static_assert(sizeof(unsigned char) == 1, "atomics require a 1-byte type");
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_Static_assert(sizeof(short unsigned int) == 2, "atomics require a 2-bytes type");
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_Static_assert(sizeof(unsigned int) == 4, "atomics require a 4-bytes type");
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ATOMIC_FUNCTIONS(1, unsigned char)
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ATOMIC_FUNCTIONS(2, short unsigned int)
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ATOMIC_FUNCTIONS(4, unsigned int)
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#elif __riscv_atomic == 1
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bool CLANG_ATOMIC_SUFFIX(__atomic_always_lock_free)(unsigned int size, const volatile void *)
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{
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return size <= sizeof(int);
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}
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CLANG_DECLARE_ALIAS(__atomic_always_lock_free)
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bool CLANG_ATOMIC_SUFFIX(__atomic_is_lock_free)(unsigned int size, const volatile void *)
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{
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return size <= sizeof(int);
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}
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CLANG_DECLARE_ALIAS(__atomic_is_lock_free)
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#endif // !HAS_ATOMICS_32
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#if !HAS_ATOMICS_64
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#if CONFIG_STDATOMIC_S32C1I_SPIRAM_WORKAROUND
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#undef _ATOMIC_HW_STUB_OP_FUNCTION
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#undef _ATOMIC_HW_STUB_EXCHANGE
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#undef _ATOMIC_HW_STUB_STORE
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#undef _ATOMIC_HW_STUB_CMP_EXCHANGE
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#undef _ATOMIC_HW_STUB_LOAD
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#undef _ATOMIC_HW_STUB_SYNC_BOOL_CMP_EXCHANGE
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#undef _ATOMIC_HW_STUB_SYNC_VAL_CMP_EXCHANGE
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#undef _ATOMIC_HW_STUB_SYNC_LOCK_TEST_AND_SET
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#undef _ATOMIC_HW_STUB_SYNC_LOCK_RELEASE
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#define _ATOMIC_HW_STUB_OP_FUNCTION(n, type, name_1, name_2)
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#define _ATOMIC_HW_STUB_EXCHANGE(n, type)
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#define _ATOMIC_HW_STUB_STORE(n, type)
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#define _ATOMIC_HW_STUB_CMP_EXCHANGE(n, type)
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#define _ATOMIC_HW_STUB_LOAD(n, type)
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#define _ATOMIC_HW_STUB_SYNC_BOOL_CMP_EXCHANGE(n, type)
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#define _ATOMIC_HW_STUB_SYNC_VAL_CMP_EXCHANGE(n, type)
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#define _ATOMIC_HW_STUB_SYNC_LOCK_TEST_AND_SET(n, type)
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#define _ATOMIC_HW_STUB_SYNC_LOCK_RELEASE(n, type)
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#endif // CONFIG_STDATOMIC_S32C1I_SPIRAM_WORKAROUND
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_Static_assert(sizeof(long long unsigned int) == 8, "atomics require a 8-bytes type");
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ATOMIC_FUNCTIONS(8, long long unsigned int)
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#endif // !HAS_ATOMICS_64
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// Clang generates calls to the __atomic_load/__atomic_store functions for object size more then 4 bytes
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void CLANG_ATOMIC_SUFFIX(__atomic_load)(size_t size, const volatile void *src, void *dest, int model)
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{
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_ATOMIC_ENTER_CRITICAL();
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memcpy(dest, (const void *)src, size);
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_ATOMIC_EXIT_CRITICAL();
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}
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CLANG_DECLARE_ALIAS(__atomic_load)
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void CLANG_ATOMIC_SUFFIX(__atomic_store)(size_t size, volatile void *dest, void *src, int model)
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{
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_ATOMIC_ENTER_CRITICAL();
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memcpy((void *)dest, (const void *)src, size);
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_ATOMIC_EXIT_CRITICAL();
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}
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CLANG_DECLARE_ALIAS(__atomic_store)
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bool CLANG_ATOMIC_SUFFIX(__atomic_compare_exchange)(size_t size, volatile void *ptr, void *expected, void *desired, int success_memorder, int failure_memorder)
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{
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bool ret = false;
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_ATOMIC_ENTER_CRITICAL();
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if (!memcmp((void *)ptr, expected, size)) {
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memcpy((void *)ptr, (const void *)desired, size);
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ret = true;
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} else {
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memcpy((void *)expected, (const void *)ptr, size);
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}
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_ATOMIC_EXIT_CRITICAL();
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return ret;
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}
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CLANG_DECLARE_ALIAS(__atomic_compare_exchange)
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