OpenCores
URL https://opencores.org/ocsvn/or1k/or1k/trunk

Subversion Repositories or1k

[/] [or1k/] [trunk/] [ecos-2.0/] [packages/] [services/] [memalloc/] [common/] [v2_0/] [include/] [memfixed.hxx] - Blame information for rev 1254

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 1254 phoenix
#ifndef CYGONCE_MEMALLOC_MEMFIXED_HXX
2
#define CYGONCE_MEMALLOC_MEMFIXED_HXX
3
 
4
//==========================================================================
5
//
6
//      memfixed.hxx
7
//
8
//      Memory pool with fixed block class declarations
9
//
10
//==========================================================================
11
//####ECOSGPLCOPYRIGHTBEGIN####
12
// -------------------------------------------
13
// This file is part of eCos, the Embedded Configurable Operating System.
14
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
15
//
16
// eCos is free software; you can redistribute it and/or modify it under
17
// the terms of the GNU General Public License as published by the Free
18
// Software Foundation; either version 2 or (at your option) any later version.
19
//
20
// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
21
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
22
// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
23
// for more details.
24
//
25
// You should have received a copy of the GNU General Public License along
26
// with eCos; if not, write to the Free Software Foundation, Inc.,
27
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
28
//
29
// As a special exception, if other files instantiate templates or use macros
30
// or inline functions from this file, or you compile this file and link it
31
// with other works to produce a work based on this file, this file does not
32
// by itself cause the resulting work to be covered by the GNU General Public
33
// License. However the source code for this file must still be made available
34
// in accordance with section (3) of the GNU General Public License.
35
//
36
// This exception does not invalidate any other reasons why a work based on
37
// this file might be covered by the GNU General Public License.
38
//
39
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
40
// at http://sources.redhat.com/ecos/ecos-license/
41
// -------------------------------------------
42
//####ECOSGPLCOPYRIGHTEND####
43
//==========================================================================
44
//#####DESCRIPTIONBEGIN####
45
//
46
// Author(s):    hmt
47
// Contributors: jlarmour
48
// Date:         2000-06-12
49
// Purpose:      Define Memfixed class interface
50
// Description:  Inline class for constructing a fixed block allocator
51
// Usage:        #include 
52
//
53
//
54
//####DESCRIPTIONEND####
55
//
56
//==========================================================================
57
 
58
// CONFIGURATION
59
 
60
#include 
61
#ifdef CYGSEM_MEMALLOC_ALLOCATOR_FIXED_THREADAWARE
62
# include 
63
# ifdef CYGPKG_KERNEL
64
#  include 
65
# endif
66
#endif
67
 
68
 
69
// INCLUDES
70
 
71
#include         // types
72
#include          // assertion macros
73
 
74
#ifdef CYGFUN_KERNEL_THREADS_TIMER
75
# include         // cyg_tick_count
76
#endif
77
 
78
#ifdef CYGSEM_MEMALLOC_ALLOCATOR_FIXED_THREADAWARE
79
# include   // kernel safe mempool template
80
#endif
81
 
82
#include    // implementation of a fixed mem pool
83
#include      // Common memory allocator infra
84
 
85
 
86
// TYPE DEFINITIONS
87
 
88
class Cyg_Mempool_Fixed
89
{
90
protected:
91
#ifdef CYGSEM_MEMALLOC_ALLOCATOR_FIXED_THREADAWARE
92
    Cyg_Mempolt2 mypool;
93
#else
94
    Cyg_Mempool_Fixed_Implementation mypool;
95
#endif
96
 
97
public:
98
    // this API makes concrete a class which implements a thread-safe
99
    // kernel-savvy memory pool which manages fixed size blocks.
100
 
101
    // Constructor: gives the base and size of the arena in which memory is
102
    // to be carved out, note that management structures are taken from the
103
    // same arena.  Alloc_unit is the blocksize allocated.
104
    Cyg_Mempool_Fixed(
105
        cyg_uint8 * /* base */,
106
        cyg_int32 /* size */,
107
        CYG_ADDRWORD /* alloc_unit */ );
108
 
109
    // Destructor
110
    ~Cyg_Mempool_Fixed();
111
 
112
#ifdef CYGSEM_MEMALLOC_ALLOCATOR_FIXED_THREADAWARE
113
    // get some memory; wait if none available
114
    cyg_uint8 *alloc();
115
 
116
# ifdef CYGFUN_KERNEL_THREADS_TIMER
117
    // get some memory with a timeout
118
    cyg_uint8 *alloc( cyg_tick_count /* delay_timeout */ );
119
# endif
120
#endif
121
 
122
    // get some memory, return NULL if none available
123
    cyg_uint8 *try_alloc();
124
 
125
    // supposedly resize existing allocation. This is defined in the
126
    // fixed block allocator purely for API consistency. It will return
127
    // an error (false) for all values, except for the blocksize
128
    // returns true on success
129
    cyg_uint8 *
130
    resize_alloc( cyg_uint8 * /* alloc_ptr */, cyg_int32 /* newsize */,
131
                  cyg_int32 * /* oldsize */ =NULL );
132
 
133
    // free the memory back to the pool
134
    cyg_bool free( cyg_uint8 * /* p */ );
135
 
136
    // Get memory pool status
137
    // flags is a bitmask of requested fields to fill in. The flags are
138
    // defined in common.hxx
139
    void get_status( cyg_mempool_status_flag_t /* flags */,
140
                     Cyg_Mempool_Status & /* status */ );
141
 
142
    CYGDBG_DEFINE_CHECK_THIS
143
};
144
 
145
#endif // ifndef CYGONCE_MEMALLOC_MEMFIXED_HXX
146
// EOF memfixed.hxx

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.