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author | Tristan Gingold <tgingold@free.fr> | 2013-12-20 04:48:54 +0100 |
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committer | Tristan Gingold <tgingold@free.fr> | 2013-12-20 04:48:54 +0100 |
commit | 6c3f709174e8e4d5411f851cedb7d84c38d3b04a (patch) | |
tree | bd12c79c71a2ee65899a9ade9919ec2045addef8 /testsuite/vests/vhdl-93/ashenden/compliant/ch_17_fg_17_08.vhd | |
parent | bd4aff0f670351c0652cf24e9b04361dc0e3a01c (diff) | |
download | ghdl-6c3f709174e8e4d5411f851cedb7d84c38d3b04a.tar.gz ghdl-6c3f709174e8e4d5411f851cedb7d84c38d3b04a.tar.bz2 ghdl-6c3f709174e8e4d5411f851cedb7d84c38d3b04a.zip |
Import vests testsuite
Diffstat (limited to 'testsuite/vests/vhdl-93/ashenden/compliant/ch_17_fg_17_08.vhd')
-rw-r--r-- | testsuite/vests/vhdl-93/ashenden/compliant/ch_17_fg_17_08.vhd | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/testsuite/vests/vhdl-93/ashenden/compliant/ch_17_fg_17_08.vhd b/testsuite/vests/vhdl-93/ashenden/compliant/ch_17_fg_17_08.vhd new file mode 100644 index 000000000..a934c82de --- /dev/null +++ b/testsuite/vests/vhdl-93/ashenden/compliant/ch_17_fg_17_08.vhd @@ -0,0 +1,68 @@ + +-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc + +-- This file is part of VESTs (Vhdl tESTs). + +-- VESTs is free software; you can redistribute it and/or modify it +-- under the terms of the GNU General Public License as published by the +-- Free Software Foundation; either version 2 of the License, or (at +-- your option) any later version. + +-- VESTs is distributed in the hope that it will be useful, but WITHOUT +-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +-- for more details. + +-- You should have received a copy of the GNU General Public License +-- along with VESTs; if not, write to the Free Software Foundation, +-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + +-- --------------------------------------------------------------------- +-- +-- $Id: ch_17_fg_17_08.vhd,v 1.2 2001-10-26 16:29:36 paw Exp $ +-- $Revision: 1.2 $ +-- +-- --------------------------------------------------------------------- + +package bounded_buffer_adt is + + subtype byte is bit_vector(0 to 7); + + type bounded_buffer_object; -- private + + type bounded_buffer is access bounded_buffer_object; + + function new_bounded_buffer ( size : in positive ) return bounded_buffer; + -- creates a bounded buffer object with 'size' bytes of storage + + procedure test_empty ( variable the_bounded_buffer : in bounded_buffer; + is_empty : out boolean ); + -- tests whether the bounded buffer is empty (i.e., no data to read) + + procedure test_full ( variable the_bounded_buffer : in bounded_buffer; + is_full : out boolean ); + -- tests whether the bounded buffer is full (i.e., no data can be written) + + procedure write ( the_bounded_buffer : inout bounded_buffer; data : in byte ); + -- if the bounded buffer is not full, writes the data + -- if it is full, assertion violation with severity failure + + procedure read ( the_bounded_buffer : inout bounded_buffer; data : out byte ); + -- if the bounded buffer is not empty, read the first byte of data + -- if it is empty, assertion violation with severity failure + + -------------------------------------------------- + + -- the following types are private to the ADT + + type store_array is array (natural range <>) of byte; + + type store_ptr is access store_array; + + type bounded_buffer_object is record + byte_count : natural; + head_index, tail_index : natural; + store : store_ptr; + end record bounded_buffer_object; + +end package bounded_buffer_adt; |