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libiberty.h (unlock_stream): New.

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include:
	* libiberty.h (unlock_stream): New.

libiberty:
	* fopen_unlocked.c (unlock_stream): New.
	Consolidate unlocking code into a helper function.

	* functions.texi: Regenerate.

From-SVN: r98234
This commit is contained in:
Kaveh R. Ghazi 2005-04-16 16:58:35 +00:00 committed by Kaveh Ghazi
parent 41704a387e
commit 6feaa084f8
5 changed files with 57 additions and 14 deletions
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4
include/ChangeLog
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@ -1,3 +1,7 @@
2005-04-16 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* libiberty.h (unlock_stream): New.
2005-04-13 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* libiberty.h (fopen_unlocked, fdopen_unlocked, freopen_unlocked):

6
include/libiberty.h
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@ -48,6 +48,12 @@ extern "C" {
#include <stdio.h>
/* If the OS supports it, ensure that the supplied stream is setup to
avoid any multi-threaded locking. Otherwise leave the FILE pointer
unchanged. If the stream is NULL do nothing. */
extern void unlock_stream (FILE *);
/* Open and return a FILE pointer. If the OS supports it, ensure that
the stream is setup to avoid any multi-threaded locking. Otherwise
return the FILE pointer unchanged. */

7
libiberty/ChangeLog
View File

@ -1,3 +1,10 @@
2005-04-16 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* fopen_unlocked.c (unlock_stream): New.
Consolidate unlocking code into a helper function.
* functions.texi: Regenerate.
2005-04-13 Gabriel Dos Reis <gdr@integrable-solutions.net>
* asprintf.c: Include config.h.

39
libiberty/fopen_unlocked.c
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@ -20,6 +20,14 @@ Boston, MA 02111-1307, USA. */
/*
@deftypefn Extension void unlock_stream (FILE * @var{stream})
If the OS supports it, ensure that the supplied stream is setup to
avoid any multi-threaded locking. Otherwise leave the @code{FILE}
pointer unchanged. If the @var{stream} is @code{NULL} do nothing.
@end deftypefn
@deftypefn Extension FILE * fopen_unlocked (const char *@var{path}, const char * @var{mode})
Opens and returns a @code{FILE} pointer via @code{fopen}. If the
@ -59,14 +67,29 @@ unchanged.
#include "libiberty.h"
FILE *
fopen_unlocked (const char *path, const char *mode)
/* This is an inline helper function to consolidate attempts to unlock
a stream. */
static inline void
unlock_1 (FILE *const fp ATTRIBUTE_UNUSED)
{
FILE *const fp = fopen (path, mode);
#if defined(HAVE___FSETLOCKING) && defined(FSETLOCKING_BYCALLER)
if (fp)
__fsetlocking (fp, FSETLOCKING_BYCALLER);
#endif
}
void
unlock_stream(FILE *fp)
{
unlock_1 (fp);
}
FILE *
fopen_unlocked (const char *path, const char *mode)
{
FILE *const fp = fopen (path, mode);
unlock_1 (fp);
return fp;
}
@ -74,10 +97,7 @@ FILE *
fdopen_unlocked (int fildes, const char *mode)
{
FILE *const fp = fdopen (fildes, mode);
#if defined(HAVE___FSETLOCKING) && defined(FSETLOCKING_BYCALLER)
if (fp)
__fsetlocking (fp, FSETLOCKING_BYCALLER);
#endif
unlock_1 (fp);
return fp;
}
@ -85,9 +105,6 @@ FILE *
freopen_unlocked (const char *path, const char *mode, FILE *stream)
{
FILE *const fp = freopen (path, mode, stream);
#if defined(HAVE___FSETLOCKING) && defined(FSETLOCKING_BYCALLER)
if (fp)
__fsetlocking (fp, FSETLOCKING_BYCALLER);
#endif
unlock_1 (fp);
return fp;
}

15
libiberty/functions.texi
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@ -362,7 +362,7 @@ and inode numbers.
@end deftypefn
@c fopen_unlocked.c:32
@c fopen_unlocked.c:40
@deftypefn Extension FILE * fdopen_unlocked (int @var{fildes}, const char * @var{mode})
Opens and returns a @code{FILE} pointer via @code{fdopen}. If the
@ -431,7 +431,7 @@ Ignores case when performing the comparison.
@end deftypefn
@c fopen_unlocked.c:23
@c fopen_unlocked.c:31
@deftypefn Extension FILE * fopen_unlocked (const char *@var{path}, const char * @var{mode})
Opens and returns a @code{FILE} pointer via @code{fopen}. If the
@ -451,7 +451,7 @@ itself.
@end deftypefn
@c fopen_unlocked.c:41
@c fopen_unlocked.c:49
@deftypefn Extension FILE * freopen_unlocked (const char * @var{path}, const char * @var{mode}, FILE * @var{stream})
Opens and returns a @code{FILE} pointer via @code{freopen}. If the
@ -1201,6 +1201,15 @@ was made to unlink the file because it is special.
@end deftypefn
@c fopen_unlocked.c:23
@deftypefn Extension void unlock_stream (FILE * @var{stream})
If the OS supports it, ensure that the supplied stream is setup to
avoid any multi-threaded locking. Otherwise leave the @code{FILE}
pointer unchanged. If the @var{stream} is @code{NULL} do nothing.
@end deftypefn
@c vasprintf.c:47
@deftypefn Extension int vasprintf (char **@var{resptr}, const char *@var{format}, va_list @var{args})