libiop.h

linux 下的线程库源码

  _IO_FILE file;
  const struct _IO_jump_t *vtable;
};

/* Generic functions */

extern int _IO_switch_to_get_mode __P((_IO_FILE*));
extern void _IO_init __P((_IO_FILE*, int));
extern int _IO_sputbackc __P((_IO_FILE*, int));
extern int _IO_sungetc __P((_IO_FILE*));
extern void _IO_un_link __P((_IO_FILE*));
extern void _IO_link_in __P((_IO_FILE *));
extern void _IO_doallocbuf __P((_IO_FILE*));
extern void _IO_unsave_markers __P((_IO_FILE*));
extern void _IO_setb __P((_IO_FILE*, char*, char*, int));
extern unsigned _IO_adjust_column __P((unsigned, const char *, int));
#define _IO_sputn(__fp, __s, __n) _IO_XSPUTN(__fp, __s, __n)

/* Marker-related function. */

extern void _IO_init_marker __P((struct _IO_marker *, _IO_FILE *));
extern void _IO_remove_marker __P((struct _IO_marker*));
extern int _IO_marker_difference __P((struct _IO_marker *, struct _IO_marker *));
extern int _IO_marker_delta __P((struct _IO_marker *));
extern int _IO_seekmark __P((_IO_FILE *, struct _IO_marker *, int));

/* Default jumptable functions. */

extern int _IO_default_underflow __P((_IO_FILE*));
extern int _IO_default_uflow __P((_IO_FILE*));
extern int _IO_default_doallocate __P((_IO_FILE*));
extern void _IO_default_finish __P((_IO_FILE *));
extern int _IO_default_pbackfail __P((_IO_FILE*, int));
extern _IO_FILE* _IO_default_setbuf __P((_IO_FILE *, char*, _IO_ssize_t));
extern _IO_size_t _IO_default_xsputn __P((_IO_FILE *, const void*, _IO_size_t));
extern _IO_size_t _IO_default_xsgetn __P((_IO_FILE *, void*, _IO_size_t));
extern _IO_fpos_t _IO_default_seekoff __P((_IO_FILE*, _IO_off_t, int, int));
extern _IO_fpos_t _IO_default_seekpos __P((_IO_FILE*, _IO_fpos_t, int));
extern _IO_ssize_t _IO_default_write __P((_IO_FILE*,const void*,_IO_ssize_t));
extern _IO_ssize_t _IO_default_read __P((_IO_FILE*, void*, _IO_ssize_t));
extern int _IO_default_stat __P((_IO_FILE*, void*));
extern _IO_fpos_t _IO_default_seek __P((_IO_FILE*, _IO_off_t, int));
extern int _IO_default_sync __P((_IO_FILE*));
#define _IO_default_close ((_IO_close_t)_IO_default_sync)

extern struct _IO_jump_t _IO_file_jumps;
extern struct _IO_jump_t _IO_streambuf_jumps;
extern struct _IO_jump_t _IO_proc_jumps;
extern struct _IO_jump_t _IO_str_jumps;
extern int _IO_do_write __P((_IO_FILE*, const char*, _IO_size_t));
extern int _IO_flush_all __P((void));
extern void _IO_cleanup __P((void));
extern void _IO_flush_all_linebuffered __P((void));

#define _IO_do_flush(_f) \
  _IO_do_write(_f, (_f)->_IO_write_base, \
              (_f)->_IO_write_ptr-(_f)->_IO_write_base)
#define _IO_in_put_mode(_fp) ((_fp)->_flags & _IO_CURRENTLY_PUTTING)
#define _IO_mask_flags(fp, f, mask) \
       ((fp)->_flags = ((fp)->_flags & ~(mask)) | ((f) & (mask)))
#define _IO_setg(fp, eb, g, eg)  ((fp)->_IO_read_base = (eb),\
       (fp)->_IO_read_ptr = (g), (fp)->_IO_read_end = (eg))
#define _IO_setp(__fp, __p, __ep) \
       ((__fp)->_IO_write_base = (__fp)->_IO_write_ptr = __p, (__fp)->_IO_write_end = (__ep))
#define _IO_have_backup(fp) ((fp)->_IO_save_base != NULL)
#define _IO_in_backup(fp) ((fp)->_flags & _IO_IN_BACKUP)
#define _IO_have_markers(fp) ((fp)->_markers != NULL)
#define _IO_blen(fp) ((fp)->_IO_buf_end - (fp)->_IO_buf_base)

/* Jumptable functions for files. */

extern int _IO_file_doallocate __P((_IO_FILE*));
extern _IO_FILE* _IO_file_setbuf __P((_IO_FILE *, char*, _IO_ssize_t));
extern _IO_fpos_t _IO_file_seekoff __P((_IO_FILE*, _IO_off_t, int, int));
extern _IO_size_t _IO_file_xsputn __P((_IO_FILE*,const void*,_IO_size_t));
extern int _IO_file_stat __P((_IO_FILE*, void*));
extern int _IO_file_close __P((_IO_FILE*));
extern int _IO_file_underflow __P((_IO_FILE *));
extern int _IO_file_overflow __P((_IO_FILE *, int));
#define _IO_file_is_open(__fp) ((__fp)->_fileno >= 0)
extern void _IO_file_init __P((_IO_FILE*));
extern _IO_FILE* _IO_file_attach __P((_IO_FILE*, int));
extern _IO_FILE* _IO_file_fopen __P((_IO_FILE*, const char*, const char*));
extern _IO_ssize_t _IO_file_write __P((_IO_FILE*,const void*,_IO_ssize_t));
extern _IO_ssize_t _IO_file_read __P((_IO_FILE*, void*, _IO_ssize_t));
extern int _IO_file_sync __P((_IO_FILE*));
extern int _IO_file_close_it __P((_IO_FILE*));
extern _IO_fpos_t _IO_file_seek __P((_IO_FILE *, _IO_off_t, int));
extern void _IO_file_finish __P((_IO_FILE*));

/* Other file functions. */
extern _IO_FILE* _IO_file_attach __P((_IO_FILE *, int));

/* Jumptable functions for proc_files. */
extern _IO_FILE* _IO_proc_open __P((_IO_FILE*, const char*, const char *));
extern int _IO_proc_close __P((_IO_FILE*));

/* Jumptable functions for strfiles. */
extern int _IO_str_underflow __P((_IO_FILE*));
extern int _IO_str_overflow __P((_IO_FILE *, int));
extern int _IO_str_pbackfail __P((_IO_FILE*, int));
extern _IO_fpos_t _IO_str_seekoff __P((_IO_FILE*,_IO_off_t,int,int));

/* Other strfile functions */
extern void _IO_str_init_static __P((_IO_FILE *, char*, int, char*));
extern void _IO_str_init_readonly __P((_IO_FILE *, const char*, int));
extern _IO_ssize_t _IO_str_count __P ((_IO_FILE*));

extern _IO_size_t _IO_getline __P((_IO_FILE*,char*,_IO_size_t,int,int));
extern _IO_ssize_t _IO_getdelim __P((char**, _IO_size_t*, int, _IO_FILE*));
extern double _IO_strtod __P((const char *, char **));
extern char * _IO_dtoa __P((double __d, int __mode, int __ndigits,
                               int *__decpt, int *__sign, char **__rve));
extern int _IO_outfloat __P((double __value, _IO_FILE *__sb, int __type,
                                int __width, int __precision, int __flags,
                                int __sign_mode, int __fill));

extern _IO_FILE *_IO_list_all;
extern void (*_IO_cleanup_registration_needed) __P ((void));

#ifndef EOF
#define EOF (-1)
#endif
#ifndef NULL
#if !defined(__cplusplus) || defined(__GNUC__)
#define NULL ((void*)0)
#else
#define NULL (0)
#endif
#endif

#ifdef __linux__
#include <sys/mman.h>
#define FREE_BUF(_B, _S) munmap ((_B), (_S))
#define ALLOC_BUF(_B,_S,_R) _B = (char*) mmap(0, (_S), \
                           PROT_READ|PROT_WRITE, \
                           MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); \
                           if (_B == (char *) -1) return (_R)
#else
#define FREE_BUF(_B) free(_B)
#define ALLOC_BUF(_B,_S,_R) _B = (char*)malloc(_S); \
                           if (_B == NULL) return (_R)
#endif

#ifndef OS_FSTAT
#define OS_FSTAT fstat
#endif
struct stat;
extern _IO_ssize_t _IO_read __P((int, void*, _IO_size_t));
extern _IO_ssize_t _IO_write __P((int, const void*, _IO_size_t));
extern _IO_off_t _IO_lseek __P((int, _IO_off_t, int));
extern int _IO_close __P((int));
extern int _IO_fstat __P((int, struct stat *));

/* Operations on _IO_fpos_t.
   Normally, these are trivial, but we provide hooks for configurations
   where an _IO_fpos_t is a struct.
   Note that _IO_off_t must be an integral type. */

/* _IO_pos_BAD is an _IO_fpos_t value indicating error, unknown, or EOF. */
#ifndef _IO_pos_BAD
#define _IO_pos_BAD ((_IO_fpos_t)(-1))
#endif
/* _IO_pos_as_off converts an _IO_fpos_t value to an _IO_off_t value. */
#ifndef _IO_pos_as_off
#define _IO_pos_as_off(__pos) ((_IO_off_t)(__pos))
#endif
/* _IO_pos_adjust adjust an _IO_fpos_t by some number of bytes. */
#ifndef _IO_pos_adjust
#define _IO_pos_adjust(__pos, __delta) ((__pos) += (__delta))
#endif
/* _IO_pos_0 is an _IO_fpos_t value indicating beginning of file. */
#ifndef _IO_pos_0
#define _IO_pos_0 ((_IO_fpos_t)0)
#endif

extern char* _IO_gen_tempname __P ((const char * dir, const char *pfx,
                                   int dir_search, _IO_size_t *lenptr,
                                   _IO_FILE **streamptr));

#ifdef __cplusplus
}
#endif

/* check following! */
#ifdef __SVR4_I386_ABI_L1__
#define FILEBUF_LITERAL(CHAIN, FLAGS, FD) \
       { 0, 0, 0, _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
         0, 0, 0, 0, 0, 0, 0, 0, 0, CHAIN, FD}
#else
#define FILEBUF_LITERAL(CHAIN, FLAGS, FD) \
       { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, CHAIN, FD}
#endif

/* VTABLE_LABEL defines NAME as of the CLASS class.
   CNLENGTH is strlen(#CLASS).  */
#ifdef __GNUC__
#if _G_VTABLE_LABEL_HAS_LENGTH
#define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \
  extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CNLENGTH #CLASS);
#else
#define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \
  extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CLASS);
#endif
#endif /* __GNUC__ */

#if !defined(builtinbuf_vtable) && defined(__cplusplus)
#ifdef __GNUC__
VTABLE_LABEL(builtinbuf_vtable, builtinbuf, 10)
#else
#if _G_VTABLE_LABEL_HAS_LENGTH
#define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##10builtinbuf
#else
#define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##builtinbuf
#endif
#endif
#endif /* !defined(builtinbuf_vtable) && defined(__cplusplus) */

#if defined(__STDC__) || defined(__cplusplus)
#define _IO_va_start(args, last) va_start(args, last)
#else
#define _IO_va_start(args, last) va_start(args)
#endif

extern struct _IO_fake_stdiobuf _IO_stdin_buf, _IO_stdout_buf, _IO_stderr_buf;

#if 1
#define COERCE_FILE(FILE) /* Nothing */
#else
/* This is part of the kludge for binary compatibility with old stdio. */
#define COERCE_FILE(FILE) \
  (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) == _OLD_MAGIC_MASK \
    && (FILE) = *(FILE**)&((int*)fp)[1])
#endif

#ifdef EINVAL
#define MAYBE_SET_EINVAL errno = EINVAL
#else
#define MAYBE_SET_EINVAL /* nothing */
#endif

#ifdef _IO_DEBUG
#define CHECK_FILE(FILE,RET) \
       if ((FILE) == NULL) { MAYBE_SET_EINVAL; return RET; } \
       else { COERCE_FILE(FILE); \
              if (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) != _IO_MAGIC) \
         { errno = EINVAL; return RET; }}
#else
#define CHECK_FILE(FILE,RET) \
       COERCE_FILE(FILE)
#endif

#include <libc-lock.h>
__libc_lock_define (extern, __libc_libio_lock);

extern void flockfile __P((_IO_FILE *));
extern void funlockfile __P((_IO_FILE *));
extern int ftrylockfile __P((_IO_FILE *));