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#ifndef LIBC_H
#define LIBC_H
#include <stdlib.h>
#include <stdio.h>
#define libc __libc
extern struct libc {
void (*lock)(volatile int *);
void (*cancelpt)(int);
int (*atexit)(void (*)(void));
void (*fini)(void);
void (*ldso_fini)(void);
int *(*errno_location)(void);
volatile int threads_minus_1;
int (*rsyscall)(int, long, long, long, long, long, long);
void (**tsd_keys)(void *);
} libc;
/* Designed to avoid any overhead in non-threaded processes */
void __lock(volatile int *);
#define LOCK(x) (libc.threads_minus_1 ? (__lock(x),1) : ((void)(x),1))
#define UNLOCK(x) (*(x)=0)
#define CANCELPT(x) (libc.cancelpt ? libc.cancelpt((x)),0 : (void)(x),0)
#define CANCELPT_BEGIN CANCELPT(1)
#define CANCELPT_END CANCELPT(0)
extern char **__environ;
#define environ __environ
#undef weak_alias
#define weak_alias(old, new) \
extern __typeof(old) new __attribute__((weak, alias(#old)))
#undef LFS64_2
//#define LFS64_2(x, y) weak_alias(x, y)
#define LFS64_2(x, y) extern __typeof(x) y
#undef LFS64
#define LFS64(x) LFS64_2(x, x##64)
#endif
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