experimental threaded libc - kernel only

1 files changed, 725 insertions, 0 deletions

diff --git a/lib/libc_r/uthread/pthread_private.h b/lib/libc_r/uthread/pthread_private.h
new file mode 100644
index 00000000000..ce7da3da5c4
--- /dev/null
+++ b/lib/libc_r/uthread/pthread_private.h
@@ -0,0 +1,725 @@
+/*
+ * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by John Birrell.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * Private thread definitions for the uthread kernel.
+ *
+ */
+
+#ifndef _PTHREAD_PRIVATE_H
+#define _PTHREAD_PRIVATE_H
+
+#include <paths.h>
+
+/*
+ * Include files.
+ */
+#include <setjmp.h>
+#include <signal.h>
+#include <sys/queue.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sched.h>
+#include <spinlock.h>
+#include "uthread_machdep.h"
+
+/*
+ * Kernel fatal error handler macro.
+ */
+#define PANIC(string)   _thread_exit(__FILE__,__LINE__,string)
+
+/* Output debug messages like this: */
+#define	stdout_debug(_x)	_write(1,_x,strlen(_x));
+#define	stderr_debug(_x)	_write(2,_x,strlen(_x));
+
+/*
+ * State change macro:
+ */
+#define PTHREAD_NEW_STATE(thrd, newstate) {				\
+	(thrd)->state = newstate;					\
+	(thrd)->fname = __FILE__;					\
+	(thrd)->lineno = __LINE__;					\
+}
+
+/*
+ * Queue definitions.
+ */
+struct pthread_queue {
+	struct pthread	*q_next;
+	struct pthread	*q_last;
+	void		*q_data;
+};
+
+/*
+ * Static queue initialization values. 
+ */
+#define PTHREAD_QUEUE_INITIALIZER { NULL, NULL, NULL }
+
+/* 
+ * Mutex definitions.
+ */
+union pthread_mutex_data {
+	void	*m_ptr;
+	int	m_count;
+};
+
+struct pthread_mutex {
+	enum pthread_mutextype		m_type;
+	struct pthread_queue		m_queue;
+	struct pthread			*m_owner;
+	union pthread_mutex_data	m_data;
+	long				m_flags;
+
+	/*
+	 * Lock for accesses to this structure.
+	 */
+	spinlock_t			lock;
+};
+
+/*
+ * Flags for mutexes. 
+ */
+#define MUTEX_FLAGS_PRIVATE	0x01
+#define MUTEX_FLAGS_INITED	0x02
+#define MUTEX_FLAGS_BUSY	0x04
+
+/*
+ * Static mutex initialization values. 
+ */
+#define PTHREAD_MUTEX_STATIC_INITIALIZER   \
+	{ MUTEX_TYPE_FAST, PTHREAD_QUEUE_INITIALIZER, \
+	NULL, { NULL }, MUTEX_FLAGS_INITED }
+
+struct pthread_mutex_attr {
+	enum pthread_mutextype	m_type;
+	long			m_flags;
+};
+
+/* 
+ * Condition variable definitions.
+ */
+enum pthread_cond_type {
+	COND_TYPE_FAST,
+	COND_TYPE_MAX
+};
+
+struct pthread_cond {
+	enum pthread_cond_type	c_type;
+	struct pthread_queue	c_queue;
+	void			*c_data;
+	long			c_flags;
+
+	/*
+	 * Lock for accesses to this structure.
+	 */
+	spinlock_t		lock;
+};
+
+struct pthread_cond_attr {
+	enum pthread_cond_type	c_type;
+	long			c_flags;
+};
+
+/*
+ * Flags for condition variables.
+ */
+#define COND_FLAGS_PRIVATE	0x01
+#define COND_FLAGS_INITED	0x02
+#define COND_FLAGS_BUSY		0x04
+
+/*
+ * Static cond initialization values. 
+ */
+#define PTHREAD_COND_STATIC_INITIALIZER    \
+	{ COND_TYPE_FAST, PTHREAD_QUEUE_INITIALIZER, NULL, COND_FLAGS_INITED }
+
+/*
+ * Cleanup definitions.
+ */
+struct pthread_cleanup {
+	struct pthread_cleanup	*next;
+	void			(*routine) ();
+	void			*routine_arg;
+};
+
+struct pthread_attr {
+	int	schedparam_policy;
+	int	prio;
+	int	suspend;
+	int	flags;
+	void	*arg_attr;
+	void	(*cleanup_attr) ();
+	void	*stackaddr_attr;
+	size_t	stacksize_attr;
+};
+
+/*
+ * Thread creation state attributes.
+ */
+#define PTHREAD_CREATE_RUNNING			0
+#define PTHREAD_CREATE_SUSPENDED		1
+
+/*
+ * Miscellaneous definitions.
+ */
+#define PTHREAD_STACK_DEFAULT			65536
+#define PTHREAD_DEFAULT_PRIORITY		64
+#define PTHREAD_MAX_PRIORITY			126
+#define PTHREAD_MIN_PRIORITY			0
+#define _POSIX_THREAD_ATTR_STACKSIZE
+
+/*
+ * Clock resolution in nanoseconds.
+ */
+#define CLOCK_RES_NSEC				10000000
+
+/*
+ * Number of microseconds between incremental priority updates for
+ * threads that are ready to run, but denied being run.
+ */
+#define INC_PRIO_USEC				500000
+
+/*
+ * Time slice period in microseconds.
+ */
+#define TIMESLICE_USEC				100000
+
+struct pthread_key {
+	spinlock_t	lock;
+	volatile int	allocated;
+	volatile int	count;
+	void            (*destructor) ();
+};
+
+/*
+ * Thread states.
+ */
+enum pthread_state {
+	PS_RUNNING,
+	PS_SIGTHREAD,
+	PS_MUTEX_WAIT,
+	PS_COND_WAIT,
+	PS_FDLR_WAIT,
+	PS_FDLW_WAIT,
+	PS_FDR_WAIT,
+	PS_FDW_WAIT,
+	PS_FILE_WAIT,
+	PS_SELECT_WAIT,
+	PS_SLEEP_WAIT,
+	PS_WAIT_WAIT,
+	PS_SIGWAIT,
+	PS_JOIN,
+	PS_SUSPENDED,
+	PS_DEAD,
+	PS_STATE_MAX
+};
+
+
+/*
+ * File descriptor locking definitions.
+ */
+#define FD_READ             0x1
+#define FD_WRITE            0x2
+#define FD_RDWR             (FD_READ | FD_WRITE)
+
+/*
+ * File descriptor table structure.
+ */
+struct fd_table_entry {
+	/*
+	 * Lock for accesses to this file descriptor table
+	 * entry. This is passed to _spinlock() to provide atomic
+	 * access to this structure. It does *not* represent the
+	 * state of the lock on the file descriptor.
+	 */
+	spinlock_t		lock;
+	struct pthread_queue	r_queue;	/* Read queue.                        */
+	struct pthread_queue	w_queue;	/* Write queue.                       */
+	struct pthread		*r_owner;	/* Ptr to thread owning read lock.    */
+	struct pthread		*w_owner;	/* Ptr to thread owning write lock.   */
+	char			*r_fname;	/* Ptr to read lock source file name  */
+	int			r_lineno;	/* Read lock source line number.      */
+	char			*w_fname;	/* Ptr to write lock source file name */
+	int			w_lineno;	/* Write lock source line number.     */
+	int			r_lockcount;	/* Count for FILE read locks.         */
+	int			w_lockcount;	/* Count for FILE write locks.        */
+	int			flags;		/* Flags used in open.                */
+};
+
+struct pthread_select_data {
+	int	nfds;
+	fd_set	readfds;
+	fd_set	writefds;
+	fd_set	exceptfds;
+};
+
+union pthread_wait_data {
+	pthread_mutex_t	*mutex;
+	pthread_cond_t	*cond;
+	const sigset_t	*sigwait;	/* Waiting on a signal in sigwait */
+	struct {
+		short	fd;		/* Used when thread waiting on fd */
+		short	branch;		/* Line number, for debugging.    */
+		char	*fname;		/* Source file name for debugging.*/
+	} fd;
+	struct pthread_select_data * select_data;
+};
+
+/*
+ * Thread structure.
+ */
+struct pthread {
+	/*
+	 * Magic value to help recognize a valid thread structure
+	 * from an invalid one:
+	 */
+#define	PTHREAD_MAGIC		((u_int32_t) 0xd09ba115)
+	u_int32_t		magic;
+	char			*name;
+
+	/*
+	 * Lock for accesses to this thread structure.
+	 */
+	spinlock_t		lock;
+
+	/*
+	 * Pointer to the next thread in the thread linked list.
+	 */
+	struct pthread	*nxt;
+
+	/*
+	 * Thread start routine, argument, stack pointer and thread
+	 * attributes.
+	 */
+	void			*(*start_routine)(void *);
+	void			*arg;
+	void			*stack;
+	struct pthread_attr	attr;
+
+	struct _machdep_struct	_machdep;
+
+	/*
+	 * Saved signal context used in call to sigreturn by
+	 * _thread_kern_sched if sig_saved is TRUE.
+	 */
+	struct  sigcontext saved_sigcontext;
+
+	/* 
+	 * Saved jump buffer used in call to longjmp by _thread_kern_sched
+	 * if sig_saved is FALSE.
+	 */
+	jmp_buf	saved_jmp_buf;
+
+	/*
+	 * TRUE if the last state saved was a signal context. FALSE if the
+	 * last state saved was a jump buffer.
+	 */
+	int	sig_saved;
+
+	/*
+	 * Current signal mask and pending signals.
+	 */
+	sigset_t	sigmask;
+	sigset_t	sigpend;
+
+	/* Thread state: */
+	enum pthread_state	state;
+
+	/* Time that this thread was last made active. */
+	struct  timeval		last_active;
+
+	/* Time that this thread was last made inactive. */
+	struct  timeval		last_inactive;
+
+	/*
+	 * Number of microseconds accumulated by this thread when
+	 * time slicing is active.
+	 */
+	long	slice_usec;
+
+	/*
+	 * Incremental priority accumulated by thread while it is ready to
+	 * run but is denied being run.
+	 */
+	int	inc_prio;
+
+	/*
+	 * Time to wake up thread. This is used for sleeping threads and
+	 * for any operation which may time out (such as select).
+	 */
+	struct timespec	wakeup_time;
+
+	/* TRUE if operation has timed out. */
+	int	timeout;
+
+	/*
+	 * Error variable used instead of errno. The function __error()
+	 * returns a pointer to this. 
+	 */
+	int	error;
+
+	/* Join queue for waiting threads: */
+	struct pthread_queue	join_queue;
+
+	/*
+	 * The current thread can belong to only one queue at a time.
+	 *
+	 * Pointer to queue (if any) on which the current thread is waiting.
+	 *
+	 * XXX The queuing should be changed to use the TAILQ entry below.
+	 * XXX For the time being, it's hybrid.
+	 */
+	struct pthread_queue	*queue;
+
+	/* Pointer to next element in queue. */
+	struct pthread	*qnxt;
+
+	/* Queue entry for this thread: */
+	TAILQ_ENTRY(pthread) qe;
+
+	/* Wait data. */
+	union pthread_wait_data data;
+
+	/*
+	 * Set to TRUE if a blocking operation was
+	 * interrupted by a signal:
+	 */
+	int		interrupted;
+
+	/* Signal number when in state PS_SIGWAIT: */
+	int		signo;
+
+	/* Miscellaneous data. */
+	char		flags;
+#define PTHREAD_EXITING		0x0100
+	char		pthread_priority;
+	void		*ret;
+	const void	**specific_data;
+	int		specific_data_count;
+
+	/* Cleanup handlers Link List */
+	struct pthread_cleanup *cleanup;
+	char			*fname;	/* Ptr to source file name  */
+	int			lineno;	/* Source line number.      */
+};
+
+/*
+ * Global variables for the uthread kernel.
+ */
+
+/* Kernel thread structure used when there are no running threads: */
+extern struct pthread   _thread_kern_thread;
+
+/* Ptr to the thread structure for the running thread: */
+extern struct pthread   * volatile _thread_run;
+
+/*
+ * Ptr to the thread running in single-threaded mode or NULL if
+ * running multi-threaded (default POSIX behaviour).
+ */
+extern struct pthread   * volatile _thread_single;
+
+/* Ptr to the first thread in the thread linked list: */
+extern struct pthread   * volatile _thread_link_list;
+
+/*
+ * Array of kernel pipe file descriptors that are used to ensure that
+ * no signals are missed in calls to _select.
+ */
+extern int              _thread_kern_pipe[2];
+extern int              _thread_kern_in_select;
+extern int              _thread_kern_in_sched;
+
+/* Last time that an incremental priority update was performed: */
+extern struct timeval   kern_inc_prio_time;
+
+/* Dead threads: */
+extern struct pthread * volatile _thread_dead;
+
+/* Initial thread: */
+extern struct pthread *_thread_initial;
+
+/* Default thread attributes: */
+extern struct pthread_attr pthread_attr_default;
+
+/* Default mutex attributes: */
+extern struct pthread_mutex_attr pthread_mutexattr_default;
+
+/* Default condition variable attributes: */
+extern struct pthread_cond_attr pthread_condattr_default;
+
+/*
+ * Standard I/O file descriptors need special flag treatment since
+ * setting one to non-blocking does all on *BSD. Sigh. This array
+ * is used to store the initial flag settings.
+ */
+extern int	_pthread_stdio_flags[3];
+
+/* File table information: */
+extern struct fd_table_entry **_thread_fd_table;
+extern int    _thread_dtablesize;
+
+/*
+ * Array of signal actions for this process.
+ */
+extern struct  sigaction _thread_sigact[NSIG];
+
+/*
+ * Where SIGINFO writes thread states when /dev/tty cannot be opened
+ */
+#define INFO_DUMP_FILE  "/tmp/uthread.dump"
+
+#ifdef	_LOCK_DEBUG
+#define	_FD_LOCK(_fd,_type,_ts)		_thread_fd_lock_debug(_fd, _type, \
+						_ts, __FILE__, __LINE__)
+#define _FD_UNLOCK(_fd,_type)		_thread_fd_unlock_debug(_fd, _type, \
+						__FILE__, __LINE__)
+#else
+#define	_FD_LOCK(_fd,_type,_ts)		_thread_fd_lock(_fd, _type, _ts)
+#define _FD_UNLOCK(_fd,_type)		_thread_fd_unlock(_fd, _type)
+#endif
+
+/*
+ * Function prototype definitions.
+ */
+__BEGIN_DECLS
+int     _find_dead_thread(pthread_t);
+int     _find_thread(pthread_t);
+int     _thread_create(pthread_t *,const pthread_attr_t *,void *(*start_routine)(void *),void *,pthread_t);
+int     _thread_fd_lock(int, int, struct timespec *);
+int     _thread_fd_lock_debug(int, int, struct timespec *,char *fname,int lineno);
+void    _dispatch_signals(void);
+void    _thread_signal(pthread_t, int);
+void    _lock_dead_thread_list(void);
+void    _lock_thread(void);
+void    _lock_thread_list(void);
+void    _unlock_dead_thread_list(void);
+void    _unlock_thread(void);
+void    _unlock_thread_list(void);
+void    _thread_exit(char *, int, char *);
+void    _thread_fd_unlock(int, int);
+void    _thread_fd_unlock_debug(int, int, char *, int);
+void    *_thread_cleanup(pthread_t);
+void    _thread_cleanupspecific(void);
+void    _thread_dump_info(void);
+void    _thread_init(void) __attribute__((constructor));
+void    _thread_kern_sched(struct sigcontext *);
+void    _thread_kern_sched_state(enum pthread_state,char *fname,int lineno);
+void    _thread_kern_set_timeout(struct timespec *);
+void    _thread_sig_handler(int, int, struct sigcontext *);
+void    _thread_start(void);
+void    _thread_start_sig_handler(void);
+void	_thread_seterrno(pthread_t,int);
+void    _thread_queue_init(struct pthread_queue *);
+void    _thread_queue_enq(struct pthread_queue *, struct pthread *);
+int     _thread_queue_remove(struct pthread_queue *, struct pthread *);
+int     _thread_fd_table_init(int fd);
+struct pthread *_thread_queue_get(struct pthread_queue *);
+struct pthread *_thread_queue_deq(struct pthread_queue *);
+
+/* #include <signal.h> */
+#ifdef _USER_SIGNAL_H
+int     _thread_sys_sigaction(int, const struct sigaction *, struct sigaction *);
+int     _thread_sys_sigpending(sigset_t *);
+int     _thread_sys_sigprocmask(int, const sigset_t *, sigset_t *);
+int     _thread_sys_sigsuspend(const sigset_t *);
+int     _thread_sys_siginterrupt(int, int);
+int     _thread_sys_sigpause(int);
+int     _thread_sys_sigreturn(struct sigcontext *);
+int     _thread_sys_sigstack(const struct sigstack *, struct sigstack *);
+int     _thread_sys_sigvec(int, struct sigvec *, struct sigvec *);
+void    _thread_sys_psignal(unsigned int, const char *);
+void    (*_thread_sys_signal(int, void (*)(int)))(int);
+#endif
+
+/* #include <sys/stat.h> */
+#ifdef  _SYS_STAT_H_
+int     _thread_sys_fchmod(int, mode_t);
+int     _thread_sys_fstat(int, struct stat *);
+int     _thread_sys_fchflags(int, u_long);
+#endif
+
+/* #include <sys/mount.h> */
+#ifdef  _SYS_MOUNT_H_
+int     _thread_sys_fstatfs(int, struct statfs *);
+#endif
+int     _thread_sys_pipe(int *);
+
+/* #include <sys/socket.h> */
+#ifdef  _SYS_SOCKET_H_
+int     _thread_sys_accept(int, struct sockaddr *, int *);
+int     _thread_sys_bind(int, const struct sockaddr *, int);
+int     _thread_sys_connect(int, const struct sockaddr *, int);
+int     _thread_sys_getpeername(int, struct sockaddr *, int *);
+int     _thread_sys_getsockname(int, struct sockaddr *, int *);
+int     _thread_sys_getsockopt(int, int, int, void *, int *);
+int     _thread_sys_listen(int, int);
+int     _thread_sys_setsockopt(int, int, int, const void *, int);
+int     _thread_sys_shutdown(int, int);
+int     _thread_sys_socket(int, int, int);
+int     _thread_sys_socketpair(int, int, int, int *);
+ssize_t _thread_sys_recv(int, void *, size_t, int);
+ssize_t _thread_sys_recvfrom(int, void *, size_t, int, struct sockaddr *, int *);
+ssize_t _thread_sys_recvmsg(int, struct msghdr *, int);
+ssize_t _thread_sys_send(int, const void *, size_t, int);
+ssize_t _thread_sys_sendmsg(int, const struct msghdr *, int);
+ssize_t _thread_sys_sendto(int, const void *,size_t, int, const struct sockaddr *, int);
+#endif
+
+/* #include <stdio.h> */
+#ifdef  _STDIO_H_
+FILE    *_thread_sys_fdopen(int, const char *);
+FILE    *_thread_sys_fopen(const char *, const char *);
+FILE    *_thread_sys_freopen(const char *, const char *, FILE *);
+FILE    *_thread_sys_popen(const char *, const char *);
+FILE    *_thread_sys_tmpfile(void);
+char    *_thread_sys_ctermid(char *);
+char    *_thread_sys_cuserid(char *);
+char    *_thread_sys_fgetln(FILE *, size_t *);
+char    *_thread_sys_fgets(char *, int, FILE *);
+char    *_thread_sys_gets(char *);
+char    *_thread_sys_tempnam(const char *, const char *);
+char    *_thread_sys_tmpnam(char *);
+int     _thread_sys_fclose(FILE *);
+int     _thread_sys_feof(FILE *);
+int     _thread_sys_ferror(FILE *);
+int     _thread_sys_fflush(FILE *);
+int     _thread_sys_fgetc(FILE *);
+int     _thread_sys_fgetpos(FILE *, fpos_t *);
+int     _thread_sys_fileno(FILE *);
+int     _thread_sys_fprintf(FILE *, const char *, ...);
+int     _thread_sys_fpurge(FILE *);
+int     _thread_sys_fputc(int, FILE *);
+int     _thread_sys_fputs(const char *, FILE *);
+int     _thread_sys_fscanf(FILE *, const char *, ...);
+int     _thread_sys_fseek(FILE *, long, int);
+int     _thread_sys_fsetpos(FILE *, const fpos_t *);
+int     _thread_sys_getc(FILE *);
+int     _thread_sys_getchar(void);
+int     _thread_sys_getw(FILE *);
+int     _thread_sys_pclose(FILE *);
+int     _thread_sys_printf(const char *, ...);
+int     _thread_sys_putc(int, FILE *);
+int     _thread_sys_putchar(int);
+int     _thread_sys_puts(const char *);
+int     _thread_sys_putw(int, FILE *);
+int     _thread_sys_remove(const char *);
+int     _thread_sys_rename (const char *, const char *);
+int     _thread_sys_scanf(const char *, ...);
+int     _thread_sys_setlinebuf(FILE *);
+int     _thread_sys_setvbuf(FILE *, char *, int, size_t);
+int     _thread_sys_snprintf(char *, size_t, const char *, ...);
+int     _thread_sys_sprintf(char *, const char *, ...);
+int     _thread_sys_sscanf(const char *, const char *, ...);
+int     _thread_sys_ungetc(int, FILE *);
+int     _thread_sys_vfprintf(FILE *, const char *, _BSD_VA_LIST_);
+int     _thread_sys_vprintf(const char *, _BSD_VA_LIST_);
+int     _thread_sys_vscanf(const char *, _BSD_VA_LIST_);
+int     _thread_sys_vsnprintf(char *, size_t, const char *, _BSD_VA_LIST_);
+int     _thread_sys_vsprintf(char *, const char *, _BSD_VA_LIST_);
+int     _thread_sys_vsscanf(const char *, const char *, _BSD_VA_LIST_);
+long    _thread_sys_ftell(FILE *);
+size_t  _thread_sys_fread(void *, size_t, size_t, FILE *);
+size_t  _thread_sys_fwrite(const void *, size_t, size_t, FILE *);
+void    _thread_sys_clearerr(FILE *);
+void    _thread_sys_perror(const char *);
+void    _thread_sys_rewind(FILE *);
+void    _thread_sys_setbuf(FILE *, char *);
+void    _thread_sys_setbuffer(FILE *, char *, int);
+#endif
+
+/* #include <unistd.h> */
+#ifdef  _UNISTD_H_
+char    *_thread_sys_ttyname(int);
+int     _thread_sys_close(int);
+int     _thread_sys_dup(int);
+int     _thread_sys_dup2(int, int);
+int     _thread_sys_exect(const char *, char * const *, char * const *);
+int     _thread_sys_execve(const char *, char * const *, char * const *);
+int     _thread_sys_fchdir(int);
+int     _thread_sys_fchown(int, uid_t, gid_t);
+int     _thread_sys_fsync(int);
+int     _thread_sys_ftruncate(int, off_t);
+int     _thread_sys_pause(void);
+int     _thread_sys_pipe(int *);
+int     _thread_sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
+off_t   _thread_sys_lseek(int, off_t, int);
+pid_t   _thread_sys_fork(void);
+pid_t   _thread_sys_tcgetpgrp(int);
+ssize_t _thread_sys_read(int, void *, size_t);
+ssize_t _thread_sys_write(int, const void *, size_t);
+void	_thread_sys__exit(int);
+#endif
+
+/* #include <fcntl.h> */
+#ifdef  _SYS_FCNTL_H_
+int     _thread_sys_creat(const char *, mode_t);
+int     _thread_sys_fcntl(int, int, ...);
+int     _thread_sys_flock(int, int);
+int     _thread_sys_open(const char *, int, ...);
+#endif
+
+/* #include <sys/ioctl.h> */
+#ifdef  _SYS_IOCTL_H_
+int     _thread_sys_ioctl(int, unsigned long, ...);
+#endif
+
+/* #include <dirent.h> */
+#ifdef  _DIRENT_H_
+DIR     *___thread_sys_opendir2(const char *, int);
+DIR     *_thread_sys_opendir(const char *);
+int     _thread_sys_alphasort(const void *, const void *);
+int     _thread_sys_scandir(const char *, struct dirent ***,
+	int (*)(struct dirent *), int (*)(const void *, const void *));
+int     _thread_sys_closedir(DIR *);
+int     _thread_sys_getdirentries(int, char *, int, long *);
+long    _thread_sys_telldir(const DIR *);
+struct  dirent *_thread_sys_readdir(DIR *);
+void    _thread_sys_rewinddir(DIR *);
+void    _thread_sys_seekdir(DIR *, long);
+#endif
+
+/* #include <sys/uio.h> */
+#ifdef  _SYS_UIO_H_
+ssize_t _thread_sys_readv(int, const struct iovec *, int);
+ssize_t _thread_sys_writev(int, const struct iovec *, int);
+#endif
+
+/* #include <sys/wait.h> */
+#ifdef _SYS_WAIT_H_
+pid_t   _thread_sys_wait(int *);
+pid_t   _thread_sys_waitpid(pid_t, int *, int);
+pid_t   _thread_sys_wait3(int *, int, struct rusage *);
+pid_t   _thread_sys_wait4(pid_t, int *, int, struct rusage *);
+#endif
+
+__END_DECLS
+
+#endif  /* !_PTHREAD_PRIVATE_H */