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linux: add dummy sys/lock.h implementation (single threaded only)

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Useful for building IDF code which relies on the legacy locking
functions from newlib.
This commit is contained in:
Ivan Grokhotkov 2021-11-16 00:26:14 +01:00
parent 7830af1eb9
commit f72ce6720d
1 changed files with 47 additions and 0 deletions
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47
components/linux/include/sys/lock.h Normal file
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/*
* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef __SYS_LOCK_H__
#define __SYS_LOCK_H__
#include <sys/types.h>
#ifdef __cplusplus
extern "C" {
#endif
/* newlib locks implementation for CONFIG_IDF_TARGET_LINUX, single threaded.
* Note, currently this doesn't implement the functions required
* when _RETARGETABLE_LOCKING is defined. They should be added.
*/
/* Compatibility definitions for legacy newlib locking functions */
typedef int _lock_t;
static inline void _lock_init(_lock_t *plock) {}
static inline void _lock_init_recursive(_lock_t *plock) {}
static inline void _lock_close(_lock_t *plock) {}
static inline void _lock_close_recursive(_lock_t *plock) {}
static inline void _lock_acquire(_lock_t *plock) {}
static inline void _lock_acquire_recursive(_lock_t *plock) {}
static inline int _lock_try_acquire(_lock_t *plock)
{
return 1;
}
static inline int _lock_try_acquire_recursive(_lock_t *plock)
{
return 1;
}
static inline void _lock_release(_lock_t *plock) {}
static inline void _lock_release_recursive(_lock_t *plock) {}
#ifdef __cplusplus
}
#endif
#endif /* __SYS_LOCK_H__ */