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Add a lock to DIR to make telldir and friends MT-safe.

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Clean up stdio.h a bit and remove _THREAD_SAFE.  Some of the
usual macros getc, putc, getchar, putchar are no longer macros.

Approved by:	-arch
This commit is contained in:
Daniel Eischen 2001-01-24 13:01:47 +00:00
parent d201fe46e3
commit f9447cd112
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=71580
2 changed files with 5 additions and 54 deletions
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1
include/dirent.h
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@ -64,6 +64,7 @@ typedef struct _dirdesc {
long dd_seek; /* magic cookie returned by getdirentries */
long dd_rewind; /* magic cookie for rewinding */
int dd_flags; /* flags for readdir */
void *dd_lock; /* hack to avoid including <pthread.h> */
struct _telldir *dd_td; /* telldir position recording */
} DIR;

58
include/stdio.h
View file

@ -318,10 +318,10 @@ __END_DECLS
/*
* This is a #define because the function is used internally and
* (unlike vfscanf) the name __svfscanf is guaranteed not to collide
* (unlike vfscanf) the name __vfscanf is guaranteed not to collide
* with a user function when _ANSI_SOURCE or _POSIX_SOURCE is defined.
*/
#define vfscanf __svfscanf
#define vfscanf __vfscanf
/*
* Stdio function-access interface.
@ -342,6 +342,7 @@ __END_DECLS
*/
__BEGIN_DECLS
int __srget __P((FILE *));
int __vfscanf __P((FILE *, const char *, _BSD_VA_LIST_));
int __svfscanf __P((FILE *, const char *, _BSD_VA_LIST_));
int __swbuf __P((int, FILE *));
__END_DECLS
@ -389,61 +390,10 @@ static __inline int __sputc(int _c, FILE *_p) {
#define fileno_unlocked(p) __sfileno(p)
#endif
#ifndef _THREAD_SAFE
#define feof(p) feof_unlocked(p)
#define ferror(p) ferror_unlocked(p)
#define clearerr(p) clearerr_unlocked(p)
#ifndef _ANSI_SOURCE
#define fileno(p) fileno_unlocked(p)
#endif
#endif
#ifndef lint
#define getc_unlocked(fp) __sgetc(fp)
#define putc_unlocked(x, fp) __sputc(x, fp)
#ifdef _THREAD_SAFE
void _flockfile_debug __P((FILE *, char *, int));
#ifdef _FLOCK_DEBUG
#define _FLOCKFILE(x) _flockfile_debug(x, __FILE__, __LINE__)
#else
#define _FLOCKFILE(x) flockfile(x)
#endif
static __inline int \
__getc_locked(FILE *_fp) \
{ \
extern int __isthreaded; \
int _ret; \
if (__isthreaded) \
_FLOCKFILE(_fp); \
_ret = getc_unlocked(_fp); \
if (__isthreaded) \
funlockfile(_fp); \
return (_ret); \
}
static __inline int \
__putc_locked(int _x, FILE *_fp) \
{ \
extern int __isthreaded; \
int _ret; \
if (__isthreaded) \
_FLOCKFILE(_fp); \
_ret = putc_unlocked(_x, _fp); \
if (__isthreaded) \
funlockfile(_fp); \
return (_ret); \
}
#define getc(fp) __getc_locked(fp)
#define putc(x, fp) __putc_locked(x, fp)
#else
#define getc(fp) getc_unlocked(fp)
#define putc(x, fp) putc_unlocked(x, fp)
#endif
#endif /* lint */
#define putc_unlocked(x, fp) __sputc(x, fp)
#define getchar() getc(stdin)
#define getchar_unlocked() getc_unlocked(stdin)
#define putchar(x) putc(x, stdout)
#define putchar_unlocked(x) putc_unlocked(x, stdout)
#endif /* !_STDIO_H_ */