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74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
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/*
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* Copyright (C) 2022 Gunar Schorcht
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup cpu_esp32
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* @{
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*
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* @file
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* @brief Wrapper for sys/lock.h
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*
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* @author Gunar Schorcht <gunar@schorcht.net>
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*
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* This file is a wrapper for sys/lock.h to ensure source code compatibility
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* even if retargetable locking is enabled in newlib.
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*/
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#ifndef SYS_LOCK_H
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#define SYS_LOCK_H
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#ifndef DOXYGEN
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include_next <sys/lock.h>
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#if defined(_RETARGETABLE_LOCKING)
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/*
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* The structured lock type has to be large enough to hold a recursive mutex.
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* Since `rmutex.h` cannot be included in this stage of header inclusion,
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* `sizeof` cannot be used here and an array of sufficient size has to be
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* defined. This is ensured by a `static_assert` in `cpu/esp_common/syscalls.c`.
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*/
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typedef struct __lock {
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void *reserved[2];
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} __lock_t;
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#endif /* defined(_RETARGETABLE_LOCKING) */
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/*
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* Declarations for source code compatibility. These functions were used
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* in earlier newlib versions. In newer newlib versions, either the
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* __lock_* or __retarget_* functions are used. They are still used in
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* ESP-IDF.
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*/
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typedef _LOCK_T _lock_t;
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void _lock_init(_lock_t *lock);
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void _lock_init_recursive(_lock_t *lock);
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void _lock_close(_lock_t *lock);
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void _lock_close_recursive(_lock_t *lock);
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void _lock_acquire(_lock_t *lock);
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void _lock_acquire_recursive(_lock_t *lock);
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int _lock_try_acquire(_lock_t *lock);
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int _lock_try_acquire_recursive(_lock_t *lock);
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void _lock_release(_lock_t *lock);
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void _lock_release_recursive(_lock_t *lock);
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#ifdef __cplusplus
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}
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#endif
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#endif /* DOXYGEN */
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#endif /* SYS_LOCK_H */
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/** @} */
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