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freebsd-dev/lib/libc/stdio/local.h

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Import CSRG 4.4BSD-Lite2 lib/libc onto vendor branch
1997-03-11 11:29:42 +00:00
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. 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.
*
* @(#)local.h 8.3 (Berkeley) 7/3/94
Remove _THREAD_SAFE and make libc thread-safe by default by adding (weak definitions to) stubs for some of the pthread functions. If the threads library is linked in, the real pthread functions will pulled in. Use the following convention for system calls wrapped by the threads library: __sys_foo - actual system call _foo - weak definition to __sys_foo foo - weak definition to __sys_foo Change all libc uses of system calls wrapped by the threads library from foo to _foo. In order to define the prototypes for _foo(), we introduce namespace.h and un-namespace.h (suggested by bde). All files that need to reference these system calls, should include namespace.h before any standard includes, then include un-namespace.h after the standard includes and before any local includes. <db.h> is an exception and shouldn't be included in between namespace.h and un-namespace.h namespace.h will define foo to _foo, and un-namespace.h will undefine foo. Try to eliminate some of the recursive calls to MT-safe functions in libc/stdio in preparation for adding a mutex to FILE. We have recursive mutexes, but would like to avoid using them if possible. Remove uneeded includes of <errno.h> from a few files. Add $FreeBSD$ to a few files in order to pass commitprep. Approved by: -arch
2001-01-24 13:01:12 +00:00
*
* $FreeBSD$
Import CSRG 4.4BSD-Lite2 lib/libc onto vendor branch
1997-03-11 11:29:42 +00:00
*/
Remove _THREAD_SAFE and make libc thread-safe by default by adding (weak definitions to) stubs for some of the pthread functions. If the threads library is linked in, the real pthread functions will pulled in. Use the following convention for system calls wrapped by the threads library: __sys_foo - actual system call _foo - weak definition to __sys_foo foo - weak definition to __sys_foo Change all libc uses of system calls wrapped by the threads library from foo to _foo. In order to define the prototypes for _foo(), we introduce namespace.h and un-namespace.h (suggested by bde). All files that need to reference these system calls, should include namespace.h before any standard includes, then include un-namespace.h after the standard includes and before any local includes. <db.h> is an exception and shouldn't be included in between namespace.h and un-namespace.h namespace.h will define foo to _foo, and un-namespace.h will undefine foo. Try to eliminate some of the recursive calls to MT-safe functions in libc/stdio in preparation for adding a mutex to FILE. We have recursive mutexes, but would like to avoid using them if possible. Remove uneeded includes of <errno.h> from a few files. Add $FreeBSD$ to a few files in order to pass commitprep. Approved by: -arch
2001-01-24 13:01:12 +00:00
#include <sys/types.h> /* for off_t */
Hide the definition of struct __sFILEX and add the needed lock definitions to it. flockfile state is now allocated along with the rest of FILE. This eliminates the need for a separate allocation of flockfile state as well as eliminating the mutex/lock used to serialize its allocation.
2001-03-01 05:22:14 +00:00
#include <pthread.h>
Remove _THREAD_SAFE and make libc thread-safe by default by adding (weak definitions to) stubs for some of the pthread functions. If the threads library is linked in, the real pthread functions will pulled in. Use the following convention for system calls wrapped by the threads library: __sys_foo - actual system call _foo - weak definition to __sys_foo foo - weak definition to __sys_foo Change all libc uses of system calls wrapped by the threads library from foo to _foo. In order to define the prototypes for _foo(), we introduce namespace.h and un-namespace.h (suggested by bde). All files that need to reference these system calls, should include namespace.h before any standard includes, then include un-namespace.h after the standard includes and before any local includes. <db.h> is an exception and shouldn't be included in between namespace.h and un-namespace.h namespace.h will define foo to _foo, and un-namespace.h will undefine foo. Try to eliminate some of the recursive calls to MT-safe functions in libc/stdio in preparation for adding a mutex to FILE. We have recursive mutexes, but would like to avoid using them if possible. Remove uneeded includes of <errno.h> from a few files. Add $FreeBSD$ to a few files in order to pass commitprep. Approved by: -arch
2001-01-24 13:01:12 +00:00
Import CSRG 4.4BSD-Lite2 lib/libc onto vendor branch
1997-03-11 11:29:42 +00:00
/*
* Information local to this implementation of stdio,
* in particular, macros and private variables.
*/
Remove _THREAD_SAFE and make libc thread-safe by default by adding (weak definitions to) stubs for some of the pthread functions. If the threads library is linked in, the real pthread functions will pulled in. Use the following convention for system calls wrapped by the threads library: __sys_foo - actual system call _foo - weak definition to __sys_foo foo - weak definition to __sys_foo Change all libc uses of system calls wrapped by the threads library from foo to _foo. In order to define the prototypes for _foo(), we introduce namespace.h and un-namespace.h (suggested by bde). All files that need to reference these system calls, should include namespace.h before any standard includes, then include un-namespace.h after the standard includes and before any local includes. <db.h> is an exception and shouldn't be included in between namespace.h and un-namespace.h namespace.h will define foo to _foo, and un-namespace.h will undefine foo. Try to eliminate some of the recursive calls to MT-safe functions in libc/stdio in preparation for adding a mutex to FILE. We have recursive mutexes, but would like to avoid using them if possible. Remove uneeded includes of <errno.h> from a few files. Add $FreeBSD$ to a few files in order to pass commitprep. Approved by: -arch
2001-01-24 13:01:12 +00:00
extern int _fseeko __P((FILE *, off_t, int));
extern int __fflush __P((FILE *fp));
Import CSRG 4.4BSD-Lite2 lib/libc onto vendor branch
1997-03-11 11:29:42 +00:00
extern int __sflush __P((FILE *));
extern FILE *__sfp __P((void));
extern int __srefill __P((FILE *));
extern int __sread __P((void *, char *, int));
extern int __swrite __P((void *, char const *, int));
extern fpos_t __sseek __P((void *, fpos_t, int));
extern int __sclose __P((void *));
extern void __sinit __P((void));
extern void _cleanup __P((void));
extern void (*__cleanup) __P((void));
extern void __smakebuf __P((FILE *));
extern int __swhatbuf __P((FILE *, size_t *, int *));
extern int _fwalk __P((int (*)(FILE *)));
extern int __swsetup __P((FILE *));
extern int __sflags __P((const char *, int *));
Remove _THREAD_SAFE and make libc thread-safe by default by adding (weak definitions to) stubs for some of the pthread functions. If the threads library is linked in, the real pthread functions will pulled in. Use the following convention for system calls wrapped by the threads library: __sys_foo - actual system call _foo - weak definition to __sys_foo foo - weak definition to __sys_foo Change all libc uses of system calls wrapped by the threads library from foo to _foo. In order to define the prototypes for _foo(), we introduce namespace.h and un-namespace.h (suggested by bde). All files that need to reference these system calls, should include namespace.h before any standard includes, then include un-namespace.h after the standard includes and before any local includes. <db.h> is an exception and shouldn't be included in between namespace.h and un-namespace.h namespace.h will define foo to _foo, and un-namespace.h will undefine foo. Try to eliminate some of the recursive calls to MT-safe functions in libc/stdio in preparation for adding a mutex to FILE. We have recursive mutexes, but would like to avoid using them if possible. Remove uneeded includes of <errno.h> from a few files. Add $FreeBSD$ to a few files in order to pass commitprep. Approved by: -arch
2001-01-24 13:01:12 +00:00
extern int __ungetc __P((int, FILE *));
extern int __vfprintf __P((FILE *, const char *, _BSD_VA_LIST_));
Import CSRG 4.4BSD-Lite2 lib/libc onto vendor branch
1997-03-11 11:29:42 +00:00
extern int __sdidinit;
Hide the definition of struct __sFILEX and add the needed lock definitions to it. flockfile state is now allocated along with the rest of FILE. This eliminates the need for a separate allocation of flockfile state as well as eliminating the mutex/lock used to serialize its allocation.
2001-03-01 05:22:14 +00:00
/* hold a buncha junk that would grow the ABI */
struct __sFILEX {
unsigned char *_up; /* saved _p when _p is doing ungetc data */
pthread_mutex_t fl_mutex; /* used for MT-safety */
pthread_t fl_owner; /* current owner */
int fl_count; /* recursive lock count */
};
Import CSRG 4.4BSD-Lite2 lib/libc onto vendor branch
1997-03-11 11:29:42 +00:00
/*
* Return true iff the given FILE cannot be written now.
*/
#define cantwrite(fp) \
(cantwrite): do not allocate memory for a NULL string PR: misc/26044 MFC after: 1 week Submitted by: bde
2001-06-18 04:44:23 +00:00
((((fp)->_flags & __SWR) == 0 || \
((fp)->_bf._base == NULL && ((fp)->_flags & __SSTR) == 0)) && \
Import CSRG 4.4BSD-Lite2 lib/libc onto vendor branch
1997-03-11 11:29:42 +00:00
__swsetup(fp))
/*
* Test whether the given stdio file has an active ungetc buffer;
* release such a buffer, without restoring ordinary unread data.
*/
#define HASUB(fp) ((fp)->_ub._base != NULL)
#define FREEUB(fp) { \
if ((fp)->_ub._base != (fp)->_ubuf) \
free((char *)(fp)->_ub._base); \
(fp)->_ub._base = NULL; \
}
/*
* test for an fgetln() buffer.
*/
#define HASLB(fp) ((fp)->_lb._base != NULL)
#define FREELB(fp) { \
free((char *)(fp)->_lb._base); \
(fp)->_lb._base = NULL; \
}
Properly initialize a temporary FILE that is allocated off the stack. The change to reuse _up from FILE (to allow FILE to grow without changing size) overlooked FILE being allocated off the stack. Approved by: sobomax
2001-06-04 12:36:07 +00:00
#define INITEXTRA(fp) { \
(fp)->_extra->_up = NULL; \
(fp)->_extra->fl_mutex = PTHREAD_MUTEX_INITIALIZER; \
(fp)->_extra->fl_owner = NULL; \
(fp)->_extra->fl_count = 0; \
}
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