]> matita.cs.unibo.it Git - helm.git/blobdiff - helm/DEVEL/gdome_xslt/ocaml/gdome_xslt/ocaml-io.h
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[helm.git] / helm / DEVEL / gdome_xslt / ocaml / gdome_xslt / ocaml-io.h
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-/**********************************************************************/
-/*                                                                    */
-/*                           Objective Caml                           */
-/*                                                                    */
-/*            Xavier Leroy, projet Cristal, INRIA Rocquencourt        */
-/*                                                                    */
-/*  Copyright 1996 Institut National de Recherche en Informatique et  */
-/*  en Automatique.  All rights reserved.  This file is distributed   */
-/*  under the terms of the GNU Library General Public License, with   */
-/*  the special exception on linking described in file                */
-/*  ../../LICENSE-INRIA.                                              */
-/*                                                                    */
-/**********************************************************************/
-
-/* Buffered input/output */
-
-#ifndef __IO_H__
-#define __IO_H__
-
-#ifndef IO_BUFFER_SIZE
-#define IO_BUFFER_SIZE 4096
-#endif
-
-typedef long file_offset;
-
-struct channel {
-  int fd;                       /* Unix file descriptor */
-  file_offset offset;           /* Absolute position of fd in the file */
-  char * end;                   /* Physical end of the buffer */
-  char * curr;                  /* Current position in the buffer */
-  char * max;                   /* Logical end of the buffer (for input) */
-  void * mutex;                 /* Placeholder for mutex (for systhreads) */
-  struct channel * next;        /* Linear chaining of channels (flush_all) */
-  int revealed;                 /* For Cash only */
-  int old_revealed;             /* For Cash only */
-  int refcount;                 /* For flush_all and for Cash */
-  char buff[IO_BUFFER_SIZE];    /* The buffer itself */
-};
-
-/* For an output channel:
-     [offset] is the absolute position of the beginning of the buffer [buff].
-   For an input channel:
-     [offset] is the absolute position of the logical end of the buffer, [max].
-*/
-
-/* Functions and macros that can be called from C.  Take arguments of
-   type struct channel *.  No locking is performed. */
-
-/* Extract a struct channel * from the heap object representing it */
-
-#define Channel(v) (*((struct channel **) (Data_custom_val(v))))
-
-#endif /* __IO_H__ */
-