esp-idf/components/newlib/include/sys/lock.h

51 wiersze
1.8 KiB
C

#ifndef _XTENSA_LOCK_H__
#define _XTENSA_LOCK_H__
/* generic lock implementation.
Weak linked stub _lock functions in lock.c, can be
replaced with a lock implementation at link time.
*/
typedef int _lock_t;
typedef _lock_t _LOCK_RECURSIVE_T;
typedef _lock_t _LOCK_T;
#include <_ansi.h>
/* NOTE: some parts of newlib statically initialise locks via
__LOCK_INIT, some initialise at runtime via __lock_init. So need to
support possibility that a _lock_t is null during first call to
_lock_acquire or _lock_try_acquire.
Lock functions all take a pointer to the _lock_t entry, so the
value stored there can be manipulated.
*/
#define __LOCK_INIT(CLASS,NAME) CLASS _lock_t NAME = 0;
#define __LOCK_INIT_RECURSIVE(CLASS,NAME) CLASS _lock_t NAME = 0;
void _lock_init(_lock_t *lock);
void _lock_init_recursive(_lock_t *lock);
void _lock_close(_lock_t *lock);
void _lock_close_recursive(_lock_t *lock);
void _lock_acquire(_lock_t *lock);
void _lock_acquire_recursive(_lock_t *lock);
int _lock_try_acquire(_lock_t *lock);
int _lock_try_acquire_recursive(_lock_t *lock);
void _lock_release(_lock_t *lock);
void _lock_release_recursive(_lock_t *lock);
#define __lock_init(lock) _lock_init(&(lock))
#define __lock_init_recursive(lock) _lock_init_recursive(&(lock))
#define __lock_close(lock) _lock_close(&(lock))
#define __lock_close_recursive(lock) _lock_close_recursive(&(lock))
#define __lock_acquire(lock) _lock_acquire(&(lock))
#define __lock_acquire_recursive(lock) _lock_acquire_recursive(&(lock))
#define __lock_try_acquire(lock) _lock_try_acquire(&(lock))
#define __lock_try_acquire_recursive(lock) _lock_try_acquire_recursive(&(lock))
#define __lock_release(lock) _lock_release(&(lock))
#define __lock_release_recursive(lock) _lock_release_recursive(&(lock))
#endif /* _XTENSA_LOCK_H__ */