summaryrefslogtreecommitdiffstats
path: root/src/libs/xpcom18a4/xpcom/glue/nsMemory.cpp
blob: 2449c58e4f513ef258fd600dc25165ab5037b293 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsXPCOM.h"
#include "nsMemory.h"
#include "nsXPCOMPrivate.h"

static nsIMemory* gMemory = nsnull;

static NS_METHOD FreeGlobalMemory(void)
{
    NS_ASSERTION(gMemory, "must be not null after SetupGlobalMemory");
    NS_IF_RELEASE(gMemory);
    return NS_OK;
}

#define ENSURE_ALLOCATOR \
  (gMemory ? PR_TRUE : (PRBool)(SetupGlobalMemory() != nsnull))

static nsIMemory*
SetupGlobalMemory()
{
    NS_ASSERTION(!gMemory, "must be called once");
    if (!gMemory)
    {
        NS_GetMemoryManager(&gMemory);
        NS_ASSERTION(gMemory, "can't get memory manager!");
        if (gMemory)
            NS_RegisterXPCOMExitRoutine(FreeGlobalMemory, 0);
    }
    return gMemory;
}

#ifdef XPCOM_GLUE
nsresult GlueStartupMemory() 
{
    NS_ASSERTION(!gMemory, "must be called once");
    if (!gMemory)
    {
        NS_GetMemoryManager(&gMemory);
        NS_ASSERTION(gMemory, "can't get memory manager!");
        if (!gMemory)
            return NS_ERROR_FAILURE;
    }
    return NS_OK;
}

void GlueShutdownMemory()
{
    NS_IF_RELEASE(gMemory);
}
#endif

////////////////////////////////////////////////////////////////////////////////
// nsMemory static helper routines

NS_COM void*
nsMemory::Alloc(PRSize size)
{
    if (!ENSURE_ALLOCATOR)
        return nsnull;
 
   return gMemory->Alloc(size);
}

NS_COM void*
nsMemory::Realloc(void* ptr, PRSize size)
{
    if (!ENSURE_ALLOCATOR)
        return nsnull;    

    return gMemory->Realloc(ptr, size);
}

NS_COM void
nsMemory::Free(void* ptr)
{
    if (!ENSURE_ALLOCATOR)
        return;    

    gMemory->Free(ptr);
}

NS_COM nsresult
nsMemory::HeapMinimize(PRBool aImmediate)
{
    if (!ENSURE_ALLOCATOR)
        return NS_ERROR_FAILURE;    

    return gMemory->HeapMinimize(aImmediate);
}

NS_COM void*
nsMemory::Clone(const void* ptr, PRSize size)
{
    if (!ENSURE_ALLOCATOR)
        return nsnull;    

    void* newPtr = gMemory->Alloc(size);
    if (newPtr)
        memcpy(newPtr, ptr, size);
    return newPtr;
}

NS_COM nsIMemory*
nsMemory::GetGlobalMemoryService()
{
    if (!ENSURE_ALLOCATOR)
        return nsnull;    
   
    nsIMemory* result = gMemory;
    NS_IF_ADDREF(result);
    return result;
}

//----------------------------------------------------------------------