mirror of
https://github.com/espressif/esp-idf.git
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fa97004faf
Implement linux port layer and reuse the original FreeRTOS layer that's compiled and used on linux target as well, by means of FreeRTOS simulator.
90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/*
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* SPDX-FileCopyrightText: 2001-2003 Swedish Institute of Computer Science
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* SPDX-FileContributor: 2018-2022 Espressif Systems (Shanghai) CO LTD
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*/
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#ifndef __SYS_ARCH_H__
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#define __SYS_ARCH_H__
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/queue.h"
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#include "freertos/semphr.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef SemaphoreHandle_t sys_sem_t;
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typedef SemaphoreHandle_t sys_mutex_t;
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typedef TaskHandle_t sys_thread_t;
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typedef struct sys_mbox_s {
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QueueHandle_t os_mbox;
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void *owner;
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}* sys_mbox_t;
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/** This is returned by _fromisr() sys functions to tell the outermost function
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* that a higher priority task was woken and the scheduler needs to be invoked.
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*/
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#define ERR_NEED_SCHED 123
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void sys_delay_ms(uint32_t ms);
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#define sys_msleep(ms) sys_delay_ms(ms)
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#define LWIP_COMPAT_MUTEX 0
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#if !LWIP_COMPAT_MUTEX
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#define sys_mutex_valid( x ) ( ( ( *x ) == NULL) ? pdFALSE : pdTRUE )
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#define sys_mutex_set_invalid( x ) ( ( *x ) = NULL )
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#endif
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#define sys_mbox_valid( x ) ( ( ( *x ) == NULL) ? pdFALSE : pdTRUE )
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/* Define the sys_mbox_set_invalid() to empty to support lock-free mbox in ESP LWIP.
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*
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* The basic idea about the lock-free mbox is that the mbox should always be valid unless
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* no socket APIs are using the socket and the socket is closed. ESP LWIP achieves this by
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* following two changes to official LWIP:
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* 1. Postpone the deallocation of mbox to netconn_free(), in other words, free the mbox when
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* no one is using the socket.
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* 2. Define the sys_mbox_set_invalid() to empty if the mbox is not actually freed.
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* The second change is necessary. Consider a common scenario: the application task calls
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* recv() to receive packets from the socket, the sys_mbox_valid() returns true. Because there
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* is no lock for the mbox, the LWIP CORE can call sys_mbox_set_invalid() to set the mbox at
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* anytime and the thread-safe issue may happen.
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*
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* However, if the sys_mbox_set_invalid() is not called after sys_mbox_free(), e.g. in netconn_alloc(),
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* we need to initialize the mbox to invalid explicitly since sys_mbox_set_invalid() now is empty.
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*/
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#define sys_mbox_set_invalid( x ) *x = NULL
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#define sys_sem_valid( x ) ( ( ( *x ) == NULL) ? pdFALSE : pdTRUE )
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#define sys_sem_set_invalid( x ) ( ( *x ) = NULL )
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void sys_delay_ms(uint32_t ms);
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sys_sem_t* sys_thread_sem_init(void);
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void sys_thread_sem_deinit(void);
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sys_sem_t* sys_thread_sem_get(void);
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typedef enum {
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LWIP_CORE_LOCK_QUERY_HOLDER,
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LWIP_CORE_LOCK_MARK_HOLDER,
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LWIP_CORE_LOCK_UNMARK_HOLDER,
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LWIP_CORE_MARK_TCPIP_TASK,
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LWIP_CORE_IS_TCPIP_INITIALIZED,
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} sys_thread_core_lock_t;
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bool
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sys_thread_tcpip(sys_thread_core_lock_t type);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __SYS_ARCH_H__ */
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