text: #ifndef _PTHREAD_IMPL_H
  #define _PTHREAD_IMPL_H
  
  #include <pthread.h>
  #include <sched.h>
  #include <signal.h>
  #include <unistd.h>
  #include <sys/mman.h>
  #include <errno.h>
  #include <limits.h>
  #include <inttypes.h>
  #include <setjmp.h>
  #include <string.h>
  #include <time.h>
  #include <locale.h>
  #include "libc.h"
  #include "syscall.h"
  #include "atomic.h"
  #include "futex.h"
  
  #define pthread __pthread
  
  struct pthread {
  	struct pthread *self;
  	void **dtv, *unused1, *unused2;
  	uintptr_t sysinfo;
  	uintptr_t canary;
  	pid_t tid, pid;
  	int tsd_used, errno_val, *errno_ptr;
  	volatile int cancel, canceldisable, cancelasync;
  	int detached;
  	unsigned char *map_base;
  	size_t map_size;
  	void *start_arg;
  	void *(*start)(void *);
  	void *result;
  	struct __ptcb *cancelbuf;
  	void **tsd;
  	pthread_attr_t attr;
  	volatile int dead;
  	struct {
  		void **head;
  		long off;
  		void *pending;
  	} robust_list;
  	int unblock_cancel;
  	int delete_timer;
  	locale_t locale;
  	int killlock[2];
  	int exitlock[2];
  };
  
  struct __timer {
  	int timerid;
  	pthread_t thread;
  };
  
  #define __SU (sizeof(size_t)/sizeof(int))
  
  #define _a_stacksize __u.__s[0]
  #define _a_guardsize __u.__s[1]
  #define _a_stackaddr __u.__s[2]
  #define _a_detach __u.__i[3*__SU+0]
  #define _m_type __u.__i[0]
  #define _m_lock __u.__i[1]
  #define _m_waiters __u.__i[2]
  #define _m_prev __u.__p[3]
  #define _m_next __u.__p[4]
  #define _m_count __u.__i[5]
  #define _c_mutex __u.__p[0]
  #define _c_seq __u.__i[2]
  #define _c_waiters __u.__i[3]
  #define _c_clock __u.__i[4]
  #define _c_lock __u.__i[5]
  #define _c_lockwait __u.__i[6]
  #define _c_waiters2 __u.__i[7]
  #define _c_destroy __u.__i[8]
  #define _rw_lock __u.__i[0]
  #define _rw_waiters __u.__i[1]
  #define _b_lock __u.__i[0]
  #define _b_waiters __u.__i[1]
  #define _b_limit __u.__i[2]
  #define _b_count __u.__i[3]
  #define _b_waiters2 __u.__i[4]
  #define _b_inst __u.__p[3]
  
  #include "pthread_arch.h"
  
  #define SIGTIMER 32
  #define SIGCANCEL 33
  #define SIGSYNCCALL 34
  
  #define SIGALL_SET ((sigset_t *)(const unsigned long long [2]){ -1,-1 })
  #define SIGPT_SET \
  	((sigset_t *)(const unsigned long [__SYSCALL_SSLEN/sizeof(long)]){ \
  	[sizeof(long)==4] = 3UL<<(32*(sizeof(long)>4)) })
  #define SIGTIMER_SET \
  	((sigset_t *)(const unsigned long [__SYSCALL_SSLEN/sizeof(long)]){ \
  	 0x80000000 })
  
  pthread_t __pthread_self_init(void);
  
  int __clone(int (*)(void *), void *, int, void *, ...);
  int __set_thread_area(void *);
  int __libc_sigaction(int, const struct sigaction *, struct sigaction *);
  int __libc_sigprocmask(int, const sigset_t *, sigset_t *);
  void __lock(volatile int *);
  void __unmapself(void *, size_t);
  
  int __timedwait(volatile int *, int, clockid_t, const struct timespec *, void (*)(void *), void *, int);
  void __wait(volatile int *, volatile int *, int, int);
  void __wake(volatile int *, int, int);
  
  void __acquire_ptc();
  void __release_ptc();
  void __inhibit_ptc();
  
  #define DEFAULT_STACK_SIZE 81920
  #define DEFAULT_GUARD_SIZE PAGE_SIZE
  
  #endif
  