weaks.c

它通过提供glibc兼容使得应用程序移植到较小的c 库时相当得容易. 它能够应用到带虚拟存储的Linux和uClinux上.在大多数带MMU部件的平台上为使它更加紧凑,它也能够编译成共享库.uClib

/* The weak pthread functions for Linux.
   Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <errno.h>
#include <limits.h>
#include <stdlib.h>

extern int __pthread_return_0 __P ((void));
extern int __pthread_return_1 __P ((void));
extern void __pthread_return_void __P ((void));

weak_alias (__pthread_return_0, pthread_attr_init)
weak_alias (__pthread_return_0, pthread_attr_destroy)
weak_alias (__pthread_return_0, pthread_attr_setdetachstate)
weak_alias (__pthread_return_0, pthread_attr_getdetachstate)
weak_alias (__pthread_return_0, pthread_attr_setschedparam)
weak_alias (__pthread_return_0, pthread_attr_getschedparam)
weak_alias (__pthread_return_0, pthread_attr_setschedpolicy)
weak_alias (__pthread_return_0, pthread_attr_getschedpolicy)
weak_alias (__pthread_return_0, pthread_attr_setinheritsched)
weak_alias (__pthread_return_0, pthread_attr_getinheritsched)
weak_alias (__pthread_return_0, pthread_attr_setscope)
weak_alias (__pthread_return_0, pthread_attr_getscope)
weak_alias (__pthread_return_0, pthread_attr_setstackaddr)
weak_alias (__pthread_return_0, pthread_attr_getstackaddr)
weak_alias (__pthread_return_0, pthread_attr_setstacksize)
weak_alias (__pthread_return_0, pthread_attr_getstacksize)
weak_alias (__pthread_return_0, pthread_mutex_init)
weak_alias (__pthread_return_0, pthread_mutex_destroy)
weak_alias (__pthread_return_0, pthread_mutex_lock)
weak_alias (__pthread_return_0, pthread_mutex_trylock)
weak_alias (__pthread_return_0, pthread_mutex_unlock)
weak_alias (__pthread_return_0, pthread_mutexattr_init)
weak_alias (__pthread_return_0, pthread_mutexattr_destroy)
weak_alias (__pthread_return_0, pthread_mutexattr_settype)
weak_alias (__pthread_return_0, pthread_mutexattr_gettype)
weak_alias (__pthread_return_0, pthread_condattr_init)
weak_alias (__pthread_return_0, pthread_condattr_destroy)
weak_alias (__pthread_return_0, pthread_setschedparam)
weak_alias (__pthread_return_0, pthread_getschedparam)
weak_alias (__pthread_return_0, pthread_getcancelstate)
weak_alias (__pthread_return_0, pthread_setcancelstate)
weak_alias (__pthread_return_0, pthread_setcanceltype)
weak_alias (__pthread_return_0, pthread_setconcurrency)
weak_alias (__pthread_return_0, pthread_getconcurrency)
weak_alias (__pthread_return_0, pthread_self)
weak_alias (__pthread_return_0, pthread_cond_init)
weak_alias (__pthread_return_0, pthread_cond_destroy)
weak_alias (__pthread_return_0, pthread_cond_wait)
weak_alias (__pthread_return_0, pthread_cond_timedwait)
weak_alias (__pthread_return_0, pthread_cond_signal)
weak_alias (__pthread_return_0, pthread_cond_broadcast)
weak_alias (__pthread_return_0, pthread_rwlock_init)
weak_alias (__pthread_return_0, pthread_rwlock_destroy)
weak_alias (__pthread_return_0, pthread_rwlock_rdlock)
weak_alias (__pthread_return_0, pthread_rwlock_wrlock)
weak_alias (__pthread_return_0, pthread_rwlock_tryrdlock)
weak_alias (__pthread_return_0, pthread_rwlock_trywrlock)
weak_alias (__pthread_return_0, pthread_rwlock_unlock)
weak_alias (__pthread_return_0, pthread_rwlockattr_init)
weak_alias (__pthread_return_0, pthread_rwlockattr_destroy)
weak_alias (__pthread_return_0, pthread_rwlockattr_setpshared)
weak_alias (__pthread_return_0, pthread_rwlockattr_getpshared)
weak_alias (__pthread_return_0, __pthread_once)
weak_alias (__pthread_return_void, __pthread_initialize_minimal)


/* Those are pthread functions which return 1 if successful. */
weak_alias (__pthread_return_1, pthread_equal)

/* pthread_exit () is a special case. */
void weak_function 
pthread_exit (void *retval)
{
  exit (EXIT_SUCCESS);
}

int
__pthread_return_0 (void)
{
  return 0;
}

int
__pthread_return_1 (void)
{
  return 1;
}

void
__pthread_return_void (void)
{
}