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