diff options
Diffstat (limited to 'mit-pthreads/stdio/stdio.c')
| -rw-r--r-- | mit-pthreads/stdio/stdio.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/mit-pthreads/stdio/stdio.c b/mit-pthreads/stdio/stdio.c new file mode 100644 index 00000000000..0b676eeb09b --- /dev/null +++ b/mit-pthreads/stdio/stdio.c @@ -0,0 +1,104 @@ +/*- + * Copyright (c) 1990 The Regents of the University of California. + * Copyright (c) 1993, 1994 Chris Provenzano. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Chris Torek. + * + * 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 the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +/*static char *sccsid = "from: @(#)stdio.c 5.3 (Berkeley) 2/24/91";*/ +static char *rcsid = "$Id$"; +#endif /* LIBC_SCCS and not lint */ + +#include <pthread.h> +#include <fcntl.h> +#include <unistd.h> +#include <stdio.h> +#include "local.h" + +/* + * Small standard I/O/seek/close functions. + * These maintain the `known seek offset' for seek optimisation. + */ +int __sread(FILE *fp, char *buf, int n) +{ + register int ret; + + /* if the read succeeded, update the current offset */ + if (fd_table[fp->_file]->ops->use_kfds < 2) { + ret = fd_table[fp->_file]->ops->read(fd_table[fp->_file]->fd, + fd_table[fp->_file]->flags, buf, n, NULL); + } else { + pthread_ssize_t (*readfn)() = fd_table[fp->_file]->ops->read; + ret = readfn(fd_table[fp->_file]->fd, buf, n); + } + if (ret >= 0) { + fp->_offset += ret; + } else { + fp->_flags &= ~__SOFF; /* paranoia */ + } + return (ret); +} + +int __swrite(FILE *fp, const char *buf, int n) +{ + if (fp->_flags & __SAPP) + (void) lseek(fp->_file, (off_t)0, SEEK_END); + fp->_flags &= ~__SOFF; /* in case FAPPEND mode is set */ + if (fd_table[fp->_file]->ops->use_kfds < 2) { + return(fd_table[fp->_file]->ops->write(fd_table[fp->_file]->fd, + fd_table[fp->_file]->flags, buf, n, NULL)); + } else { + pthread_ssize_t (*writefn)() = fd_table[fp->_file]->ops->write; + return(writefn(fd_table[fp->_file]->fd,buf,n)); + } +} + +fpos_t __sseek(FILE *fp, off_t offset, int whence) +{ + register fpos_t ret; + + ret = (fpos_t)lseek(fp->_file, offset, whence); + if (ret == -1L) + fp->_flags &= ~__SOFF; + else { + fp->_flags |= __SOFF; + fp->_offset = ret; + } + return (ret); +} + +int __sclose(FILE *fp) +{ + return (close(fp->_file)); +} |