kolibrios/programs/develop/libraries/newlib/reent/closer.c
Sergey Semyonov (Serge) 0a3f4b2193 Newlib source code
git-svn-id: svn://kolibrios.org@1693 a494cfbc-eb01-0410-851d-a64ba20cac60
2010-11-07 13:42:29 +00:00

86 lines
1.6 KiB
C

/* Reentrant version of close system call. */
#include <reent.h>
#include <unistd.h>
#include <_syslist.h>
#include <errno.h>
/* Some targets provides their own versions of this functions. Those
targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS. */
#ifdef _REENT_ONLY
#ifndef REENTRANT_SYSCALLS_PROVIDED
#define REENTRANT_SYSCALLS_PROVIDED
#endif
#endif
#ifndef REENTRANT_SYSCALLS_PROVIDED
/*
FUNCTION
<<_close_r>>---Reentrant version of close
INDEX
_close_r
ANSI_SYNOPSIS
#include <reent.h>
int _close_r(struct _reent *<[ptr]>, int <[fd]>);
TRAD_SYNOPSIS
#include <reent.h>
int _close_r(<[ptr]>, <[fd]>)
struct _reent *<[ptr]>;
int <[fd]>;
DESCRIPTION
This is a reentrant version of <<close>>. It
takes a pointer to the global data block, which holds
<<errno>>.
*/
extern unsigned __NFiles;
#define __handle_check( __h, __r ) \
if( (__h) < 0 || (__h) > __NFiles ) { \
ptr->_errno = EBADF ; \
return( __r ); \
}
int
_DEFUN(_close_r, (ptr, fd),
struct _reent *ptr _AND
int fd)
{
int ret;
int h;
__file_handle *fh;
__handle_check( fd, -1 );
fh = (__file_handle*) __getOSHandle( fd );
_free_r(ptr, fh->name);
_free_r(ptr, fh);
__freePOSIXHandle( fd );
__SetIOMode_nogrow( fd, 0 );
return 0;
}
int
_DEFUN( close,(fd),
int fd)
{
return _close_r(_REENT, fd);
}
#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */