blob: 7dad6f82d8c6838fc9515fa5d02b5f62c8ec5242 (
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
|
/**
* @file lllivefile.cpp
*
* Copyright (c) 2006-$CurrentYear$, Linden Research, Inc.
* $License$
*/
#include "linden_common.h"
#include "lllivefile.h"
LLLiveFile::LLLiveFile(const std::string &filename, const F32 refresh_period) :
mForceCheck(true),
mRefreshPeriod(refresh_period),
mFilename(filename),
mLastModTime(0),
mLastExists(false)
{
}
LLLiveFile::~LLLiveFile()
{
}
bool LLLiveFile::checkAndReload()
{
if (!mForceCheck && mRefreshTimer.getElapsedTimeF32() < mRefreshPeriod)
{
// Skip the check if not enough time has elapsed and we're not
// forcing a check of the file
return false;
}
mForceCheck = false;
mRefreshTimer.reset();
// Stat the file to see if it exists and when it was last modified.
llstat stat_data;
int res = LLFile::stat(mFilename.c_str(), &stat_data);
if (res)
{
// Couldn't stat the file, that means it doesn't exist or is
// broken somehow. Clear flags and return.
if (mLastExists)
{
loadFile(); // Load the file, even though it's missing to allow it to clear state.
mLastExists = false;
return true;
}
return false;
}
// The file exists, decide if we want to load it.
if (mLastExists)
{
// The file existed last time, don't read it if it hasn't changed since
// last time.
if (stat_data.st_mtime <= mLastModTime)
{
return false;
}
}
// We want to read the file. Update status info for the file.
mLastExists = true;
mLastModTime = stat_data.st_mtime;
loadFile();
return true;
}
|
