kopia lustrzana https://github.com/espressif/esp-idf
60 wiersze
1.4 KiB
C
60 wiersze
1.4 KiB
C
/*
|
|
* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
/*
|
|
* This file provides only very simple stubs to build IDF-based FreeRTOSes which use spinlocks on Linux.
|
|
*/
|
|
#pragma once
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#define SPINLOCK_FREE 0xB33FFFFF
|
|
#define SPINLOCK_WAIT_FOREVER (-1)
|
|
#define SPINLOCK_NO_WAIT 0
|
|
#define SPINLOCK_INITIALIZER {.owner = SPINLOCK_FREE,.count = 0}
|
|
#define CORE_ID_REGVAL_XOR_SWAP (0xCDCD ^ 0xABAB)
|
|
|
|
/**
|
|
* @brief Spinlock object
|
|
* Owner:
|
|
* - Set to 0 if uninitialized
|
|
* - Set to portMUX_FREE_VAL when free
|
|
* - Set to CORE_ID_REGVAL_PRO or CORE_ID_REGVAL_AP when locked
|
|
* - Any other value indicates corruption
|
|
* Count:
|
|
* - 0 if unlocked
|
|
* - Recursive count if locked
|
|
*
|
|
* @note Not a true spinlock as single core RISC-V does not have atomic compare and set instruction
|
|
* @note Keep portMUX_INITIALIZER_UNLOCKED in sync with this struct
|
|
*/
|
|
typedef struct {
|
|
uint32_t owner;
|
|
uint32_t count;
|
|
}spinlock_t;
|
|
|
|
static inline void __attribute__((always_inline)) spinlock_initialize(spinlock_t *lock)
|
|
{
|
|
}
|
|
|
|
static inline bool __attribute__((always_inline)) spinlock_acquire(spinlock_t *lock, int32_t timeout)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static inline void __attribute__((always_inline)) spinlock_release(spinlock_t *lock)
|
|
{
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|