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bytevectors have internal parent field

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* libguile/bytevectors.h (SCM_BYTEVECTOR_HEADER_SIZE): Bump, giving
  bytevectors another word: a parent pointer.  Will allow for
  sub-bytevectors and efficient mmap bindings.

* libguile/bytevectors.c (make_bytevector):
  (make_bytevector_from_buffer): Init parent to #f.
  (scm_c_take_bytevector, scm_c_take_typed_bytevector): Another
  argument, the parent, which gets set in the bytevector.

* libguile/foreign.c (scm_pointer_to_bytevector): Use the parent field
  instead of registering a weak reference from bytevector to foreign
  pointer.

* libguile/objcodes.c (scm_objcode_to_bytecode): Use the parent field to
  avoid copying the objcode.

* libguile/srfi-4.c (DEFINE_SRFI_4_C_FUNCS):
* libguile/strings.c (scm_from_stringn):
* libguile/vm.c (really_make_boot_program):
* libguile/r6rs-ports.c (scm_get_bytevector_some)
  (scm_get_bytevector_all, bytevector_output_port_procedure): Set the
  parent to #f.
This commit is contained in:
Andy Wingo 2011-05-07 14:57:15 +02:00
parent 5eb75b5de0
commit 059a588fed
8 changed files with 45 additions and 25 deletions
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10
libguile/bytevectors.h
View file

@ -1,7 +1,7 @@
#ifndef SCM_BYTEVECTORS_H
#define SCM_BYTEVECTORS_H
/* Copyright (C) 2009 Free Software Foundation, Inc.
/* Copyright (C) 2009, 2011 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
@ -28,12 +28,14 @@
/* The size in words of the bytevector header (type tag and flags, length,
and pointer to the underlying buffer). */
#define SCM_BYTEVECTOR_HEADER_SIZE 3U
#define SCM_BYTEVECTOR_HEADER_SIZE 4U
#define SCM_BYTEVECTOR_LENGTH(_bv) \
((size_t) SCM_CELL_WORD_1 (_bv))
#define SCM_BYTEVECTOR_CONTENTS(_bv) \
((signed char *) SCM_CELL_WORD_2 (_bv))
#define SCM_BYTEVECTOR_PARENT(_bv) \
(SCM_CELL_OBJECT_3 (_bv))
SCM_API SCM scm_endianness_big;
@ -132,13 +134,13 @@ SCM_API SCM scm_utf32_to_string (SCM, SCM);
SCM_INTERNAL SCM scm_i_make_typed_bytevector (size_t, scm_t_array_element_type);
SCM_INTERNAL SCM scm_c_take_typed_bytevector (signed char *, size_t,
scm_t_array_element_type);
scm_t_array_element_type, SCM);
SCM_INTERNAL void scm_bootstrap_bytevectors (void);
SCM_INTERNAL void scm_init_bytevectors (void);
SCM_INTERNAL SCM scm_i_native_endianness;
SCM_INTERNAL SCM scm_c_take_bytevector (signed char *, size_t);
SCM_INTERNAL SCM scm_c_take_bytevector (signed char *, size_t, SCM);
SCM_INTERNAL int scm_i_print_bytevector (SCM, SCM, scm_print_state *);