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coap_mutex_internal.h
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/*
* coap_mutex.h -- mutex utilities
*
* Copyright (C) 2019-2024 Jon Shallow <supjps-libcoap@jpshallow.com>
* 2019 Olaf Bergmann <bergmann@tzi.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*
* This file is part of the CoAP library libcoap. Please see README for terms
* of use.
*/
#ifndef COAP_MUTEX_INTERNAL_H_
#define COAP_MUTEX_INTERNAL_H_
/*
* Mutexes are used for
* 1) If there is a constrained stack, and large static variables (instead
* of the large variable being on the stack) need to be protected.
* 2) libcoap if built with thread safe support.
*/
#if defined(HAVE_PTHREAD_H) && defined(HAVE_PTHREAD_MUTEX_LOCK)
#include <pthread.h>
typedef pthread_mutex_t coap_mutex_t;
#define coap_mutex_init(a) pthread_mutex_init(a, NULL)
#define coap_mutex_destroy(a) pthread_mutex_destroy(a)
#define coap_mutex_lock(a) pthread_mutex_lock(a)
#define coap_mutex_trylock(a) pthread_mutex_trylock(a)
#define coap_mutex_unlock(a) pthread_mutex_unlock(a)
#if defined(ESPIDF_VERSION)
#define coap_thread_pid_t TaskHandle_t
#define coap_thread_pid xTaskGetCurrentTaskHandle()
#else /* !ESPIDF_VERSION */
#define coap_thread_pid_t pthread_t
#define coap_thread_pid pthread_self()
#endif /* !ESPIDF_VERSION */
#elif defined(RIOT_VERSION)
/* use RIOT's mutex API */
#include <mutex.h>
typedef mutex_t coap_mutex_t;
#define coap_mutex_init(a) mutex_init(a)
#define coap_mutex_destroy(a)
#define coap_mutex_lock(a) mutex_lock(a)
#define coap_mutex_trylock(a) mutex_trylock(a)
#define coap_mutex_unlock(a) mutex_unlock(a)
#define coap_thread_pid_t kernel_pid_t
#define coap_thread_pid thread_getpid()
#elif defined(WITH_LWIP)
/* Use LwIP's mutex API */
#if NO_SYS
#if COAP_THREAD_SAFE
#error Multi-threading not supported (no mutex support)
#endif /* ! COAP_THREAD_SAFE */
/* Single threaded, no-op'd in lwip/sys.h */
typedef int coap_mutex_t;
#define coap_mutex_init(a) *(a) = 0
#define coap_mutex_destroy(a) *(a) = 0
#define coap_mutex_lock(a) *(a) = 1
#define coap_mutex_trylock(a) *(a) = 1
#define coap_mutex_unlock(a) *(a) = 0
#define coap_thread_pid_t int
#define coap_thread_pid 1
#else /* !NO_SYS */
#include <lwip/sys.h>
#ifdef LWIP_UNIX_LINUX
#include <pthread.h>
typedef pthread_mutex_t coap_mutex_t;
#define coap_mutex_init(a) pthread_mutex_init(a, NULL)
#define coap_mutex_destroy(a) pthread_mutex_destroy(a)
#define coap_mutex_lock(a) pthread_mutex_lock(a)
#define coap_mutex_trylock(a) pthread_mutex_trylock(a)
#define coap_mutex_unlock(a) pthread_mutex_unlock(a)
#define coap_thread_pid_t pthread_t
#define coap_thread_pid pthread_self()
#else /* ! LWIP_UNIX_LINUX */
typedef sys_mutex_t coap_mutex_t;
#define coap_mutex_init(a) sys_mutex_new(a)
#define coap_mutex_destroy(a) sys_mutex_set_invalid(a)
#define coap_mutex_lock(a) sys_mutex_lock(a)
#define coap_mutex_unlock(a) sys_mutex_unlock(a)
#define coap_thread_pid_t sys_thread_t
#define coap_thread_pid (coap_thread_pid_t)1
#if COAP_THREAD_RECURSIVE_CHECK
#error COAP_THREAD_RECURSIVE_CHECK not supported (no coap_mutex_trylock())
#endif /* COAP_THREAD_RECURSIVE_CHECK */
#endif /* !LWIP_UNIX_LINUX */
#endif /* !NO_SYS */
#elif defined(WITH_CONTIKI)
#if COAP_THREAD_SAFE
#error Multi-threading not supported (no mutex support)
#endif /* ! COAP_THREAD_SAFE */
/* Contiki does not have a mutex API, used as single thread */
typedef int coap_mutex_t;
#define coap_mutex_init(a) *(a) = 0
#define coap_mutex_destroy(a) *(a) = 0
#define coap_mutex_lock(a) *(a) = 1
#define coap_mutex_trylock(a) *(a) = 1
#define coap_mutex_unlock(a) *(a) = 0
#define coap_thread_pid_t int
#define coap_thread_pid 1
#elif defined(__ZEPHYR__)
#include <zephyr/sys/mutex.h>
typedef struct sys_mutex coap_mutex_t;
#define coap_mutex_init(a) sys_mutex_init(a)
#define coap_mutex_destroy(a)
#define coap_mutex_lock(a) sys_mutex_lock(a, K_FOREVER)
#define coap_mutex_trylock(a) sys_mutex_lock(a, K_NO_WAIT)
#define coap_mutex_unlock(a) sys_mutex_unlock(a)
#else /* !__ZEPYR__ && !WITH_CONTIKI && !WITH_LWIP && !RIOT_VERSION && !HAVE_PTHREAD_H && !HAVE_PTHREAD_MUTEX_LOCK */
/* define stub mutex functions */
#if COAP_THREAD_SAFE
#error Multi-threading not supported (no mutex support)
#else /* ! COAP_THREAD_SAFE */
#if COAP_CONSTRAINED_STACK
#warning "stub mutex functions"
#endif /* COAP_CONSTRAINED_STACK */
#endif /* ! COAP_THREAD_SAFE */
typedef int coap_mutex_t;
#define coap_mutex_init(a) *(a) = 0
#define coap_mutex_destroy(a) *(a) = 0
#define coap_mutex_lock(a) *(a) = 1
#define coap_mutex_trylock(a) *(a) = 1
#define coap_mutex_unlock(a) *(a) = 0
#define coap_thread_pid_t int
#define coap_thread_pid 1
#endif /* !WITH_CONTIKI && !WITH_LWIP && !RIOT_VERSION && !HAVE_PTHREAD_H && !HAVE_PTHREAD_MUTEX_LOCK */
#endif /* COAP_MUTEX_INTERNAL_H_ */
coap_mutex_t
int coap_mutex_t
Definition coap_mutex_internal.h:141