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
|
/* -*- Mode: C++; tab-width: 2; 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 IPC.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2003
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Conrad Carlen <ccarlen@netscape.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either 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 "ipcMessageWriter.h"
#include "prmem.h"
#include <string.h>
#ifdef VBOX_USE_IPRT_IN_XPCOM
# include <iprt/mem.h>
#endif
//*****************************************************************************
// ipcMessageWriter
//*****************************************************************************
ipcMessageWriter::~ipcMessageWriter()
{
if (mBuf)
#ifdef VBOX_USE_IPRT_IN_XPCOM
RTMemFree(mBuf);
#else
free(mBuf);
#endif
}
void ipcMessageWriter::PutInt8(PRUint8 val)
{
if (EnsureCapacity(sizeof(PRUint8)))
*mBufPtr++ = val;
}
// PutInt16 and PutInt32 go to pains to avoid unaligned memory accesses that
// are larger than a byte. On some platforms, that causes a performance penalty.
// On other platforms, Tru64 for instance, it's an error.
void ipcMessageWriter::PutInt16(PRUint16 val)
{
if (EnsureCapacity(sizeof(PRUint16))) {
PRUint8 temp[2];
*(PRUint16*)temp = val;
*mBufPtr++ = temp[0];
*mBufPtr++ = temp[1];
}
}
void ipcMessageWriter::PutInt32(PRUint32 val)
{
if (EnsureCapacity(sizeof(PRUint32))) {
PRUint8 temp[4];
*(PRUint32*)temp = val;
*mBufPtr++ = temp[0];
*mBufPtr++ = temp[1];
*mBufPtr++ = temp[2];
*mBufPtr++ = temp[3];
}
}
PRUint32 ipcMessageWriter::PutBytes(const void* src, PRUint32 n)
{
if (EnsureCapacity(n)) {
memcpy(mBufPtr, src, n);
mBufPtr += n;
return n;
}
return 0;
}
PRBool ipcMessageWriter::GrowCapacity(PRInt32 sizeNeeded)
{
if (sizeNeeded < 0)
return PR_FALSE;
PRInt32 newCapacity = (mBufPtr - mBuf) + sizeNeeded;
if (mCapacity == 0)
mCapacity = newCapacity;
else
{
while (newCapacity > mCapacity && (mCapacity << 1) > 0)
mCapacity <<= 1;
if (newCapacity > mCapacity) // if we broke out because of rollover
return PR_FALSE;
}
PRInt32 curPos = mBufPtr - mBuf;
#ifdef VBOX_USE_IPRT_IN_XPCOM
mBuf = (PRUint8*)RTMemRealloc(mBuf, mCapacity);
#else
mBuf = (PRUint8*)realloc(mBuf, mCapacity);
#endif
if (!mBuf) {
mError = PR_TRUE;
return PR_FALSE;
}
mBufPtr = mBuf + curPos;
mBufEnd = mBuf + mCapacity;
return PR_TRUE;
}
|
