5345c9b884
this is analogous commit fffc5cda10
which fixed the corresponding issue for mutexes.
the robust list can't be used here because the locks do not share a
common layout with mutexes. at some point it may make sense to simply
incorporate a mutex object into the FILE structure and use it, but
that would be a much more invasive change, and it doesn't mesh well
with the current design that uses a simpler code path for internal
locking and pulls in the recursive-mutex-like code when the flockfile
API is used explicitly.
94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
#ifndef _STDIO_IMPL_H
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#define _STDIO_IMPL_H
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#include <stdio.h>
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#include "syscall.h"
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#include "libc.h"
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#define UNGET 8
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#define FFINALLOCK(f) ((f)->lock>=0 ? __lockfile((f)) : 0)
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#define FLOCK(f) int __need_unlock = ((f)->lock>=0 ? __lockfile((f)) : 0)
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#define FUNLOCK(f) if (__need_unlock) __unlockfile((f)); else
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#define F_PERM 1
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#define F_NORD 4
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#define F_NOWR 8
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#define F_EOF 16
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#define F_ERR 32
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#define F_SVB 64
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#define F_APP 128
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struct _IO_FILE {
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unsigned flags;
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unsigned char *rpos, *rend;
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int (*close)(FILE *);
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unsigned char *wend, *wpos;
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unsigned char *mustbezero_1;
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unsigned char *wbase;
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size_t (*read)(FILE *, unsigned char *, size_t);
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size_t (*write)(FILE *, const unsigned char *, size_t);
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off_t (*seek)(FILE *, off_t, int);
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unsigned char *buf;
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size_t buf_size;
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FILE *prev, *next;
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int fd;
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int pipe_pid;
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long lockcount;
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short dummy3;
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signed char mode;
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signed char lbf;
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int lock;
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int waiters;
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void *cookie;
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off_t off;
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char *getln_buf;
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void *mustbezero_2;
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unsigned char *shend;
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off_t shlim, shcnt;
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FILE *prev_locked, *next_locked;
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};
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size_t __stdio_read(FILE *, unsigned char *, size_t);
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size_t __stdio_write(FILE *, const unsigned char *, size_t);
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size_t __stdout_write(FILE *, const unsigned char *, size_t);
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off_t __stdio_seek(FILE *, off_t, int);
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int __stdio_close(FILE *);
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size_t __string_read(FILE *, unsigned char *, size_t);
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int __toread(FILE *);
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int __towrite(FILE *);
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#if defined(__PIC__) && (100*__GNUC__+__GNUC_MINOR__ >= 303)
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__attribute__((visibility("protected")))
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#endif
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int __overflow(FILE *, int), __uflow(FILE *);
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int __fseeko(FILE *, off_t, int);
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int __fseeko_unlocked(FILE *, off_t, int);
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off_t __ftello(FILE *);
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off_t __ftello_unlocked(FILE *);
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size_t __fwritex(const unsigned char *, size_t, FILE *);
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int __putc_unlocked(int, FILE *);
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FILE *__fdopen(int, const char *);
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int __fmodeflags(const char *);
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#define OFLLOCK() LOCK(libc.ofl_lock)
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#define OFLUNLOCK() UNLOCK(libc.ofl_lock)
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#define feof(f) ((f)->flags & F_EOF)
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#define ferror(f) ((f)->flags & F_ERR)
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#define getc_unlocked(f) \
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( ((f)->rpos < (f)->rend) ? *(f)->rpos++ : __uflow((f)) )
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#define putc_unlocked(c, f) ( ((c)!=(f)->lbf && (f)->wpos<(f)->wend) \
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? *(f)->wpos++ = (c) : __overflow((f),(c)) )
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/* Caller-allocated FILE * operations */
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FILE *__fopen_rb_ca(const char *, FILE *, unsigned char *, size_t);
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int __fclose_ca(FILE *);
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#endif
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