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#ifndef _LOWLEVELLOCK_H
#define _LOWLEVELLOCK_H 1
#include <pthread.h>
#define lll_define(class, futex) \
class pthread_mutex_t futex
#define LLL_LOCK_INITIALIZER PTHREAD_MUTEX_INITIALIZER
#define lll_define_initialized(class, futex) \
class pthread_mutex_t futex = PTHREAD_MUTEX_INITIALIZER
#include <stddef.h>
#include <sys/syscall.h>
#define lll_init(futex) \
__libc_lock_init (futex)
#define lll_lock(futex, private) \
__libc_lock_lock (futex)
#define lll_trylock(futex) \
__libc_lock_trylock (futex)
#define lll_unlock(futex, private) \
__libc_lock_unlock (futex)
/* XXX: We emulate futex_wait/wake via busy waiting. */
#define lll_futex_wait(futex, val, private) \
sched_yield ()
#define lll_futex_wake(futex, nr, private) \
sched_yield ()
/* XXX: We really shouldn't assume the existence of result. */
#define lll_wait_tid(tid) \
do { \
sysret_t __ret; \
result = __systemcall (&__ret, SYS_lwp_wait, (tid), NULL); \
} while (result == EINTR || result == ERESTART);
#define lll_tryjoin(tid) \
({sysret_t __ret; \
__systemcall (&__ret, SYS_lwp_kill, (tid), 0) != ESRCH;})
#endif /* _LOWLEVELLOCK_H */
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