esp-idf/components/freertos/FreeRTOS-Kernel/portable/linux/include/spinlock.h
Jakob Hasse bfbbd9d790 feat(freertos): Added FreeRTOS POSIX/Linux Simulator
* Added port layer from the FreeRTOS POSIX port, added
  additional port code for ESP-IDF.
* Created another hello world example using that POSIX
  port in tools/test_apps.
* Removed old linux app
2022-09-27 16:23:54 +02:00

60 lines
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