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Work arround timestamp precision in ramdisks 

This fixes the timestamp precision when mounting RamDisks, by ensuring that the modified timestamp is always greater than the original timestamp.
This commit is contained in:
tobspr 2016-02-20 19:55:49 +01:00
parent aa4a73af7d
commit 1795a7c8dd
1 changed files with 10 additions and 2 deletions
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12
panda/src/express/virtualFileMountRamdisk.cxx
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@ -235,7 +235,13 @@ open_write_file(const Filename &file, bool truncate) {
if (truncate) {
// Reset to an empty string.
f->_data.str(string());
f->_timestamp = time(NULL);
// Instead of setting the time, we ensure that we always store a newer time.
// This is a workarround for the case that a file is written twice per
// second, since the timer only has a one second precision. The proper
// solution to fix this would be to switch to a higher precision
// timer everywhere.
f->_timestamp = max(f->_timestamp + 1, time(NULL));
}
return new OSubStream(&f->_wrapper, 0, 0);
@ -275,7 +281,9 @@ open_read_write_file(const Filename &file, bool truncate) {
if (truncate) {
// Reset to an empty string.
f->_data.str(string());
f->_timestamp = time(NULL);
// See open_write_file
f->_timestamp = max(f->_timestamp + 1, time(NULL));
}
return new SubStream(&f->_wrapper, 0, 0);