lock.h

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#ifndef __SYS_LOCK_H__
#define __SYS_LOCK_H__
 
/* dummy lock routines for single-threaded aps */
 
typedef int _LOCK_T;
typedef int _LOCK_RECURSIVE_T;
 
#define __LOCK_INIT(CLASS,NAME)             CLASS _LOCK_T NAME = 0
#define __LOCK_INIT_RECURSIVE(CLASS,NAME)   CLASS _LOCK_RECURSIVE_T NAME = 0
 
#define __lock_init(NAME) \
    __libc_lock_init(&(NAME),0)
 
#define __lock_init_recursive(NAME) \
    __libc_lock_init(&(NAME),1)
 
#define __lock_close(NAME) \
    __libc_lock_close(&(NAME))
 
#define __lock_close_recursive(NAME) \
    __libc_lock_close(&(NAME))
 
#define __lock_acquire(NAME) \
    if(!(NAME)) __libc_lock_init(&(NAME),0);    \
    __libc_lock_acquire(&(NAME))
 
#define __lock_acquire_recursive(NAME) \
    if(!(NAME)) __libc_lock_init(&(NAME),1);    \
    __libc_lock_acquire(&(NAME))
 
#define __lock_try_acquire(NAME) \
    if(!(NAME)) __libc_lock_init(&(NAME),0);    \
    __libc_lock_try_acquire(&(NAME))
 
#define __lock_try_acquire_recursive(NAME) \
    if(!(NAME)) __libc_lock_init(&(NAME),1);    \
    __libc_lock_try_acquire(&(NAME))
 
#define __lock_release(NAME) \
    __libc_lock_release(&(NAME))
 
#define __lock_release_recursive(NAME) \
    __libc_lock_release(&(NAME))
 
 
extern int __libc_lock_init(int*,int);
extern int __libc_lock_close(int*);
extern int __libc_lock_acquire(int*);
extern int __libc_lock_try_acquire(int*);
extern int __libc_lock_release(int*);
 
#endif /* __SYS_LOCK_H__ */