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Make Formats::isZippedFile() threadsafe

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In this case I use a mutex, so the zip status of files is shared between
threads. This is possible because a deadlock can't happen, and it should give
better performance.
This commit is contained in:
Georg Baum 2014-07-07 21:34:54 +02:00
parent f5cf3705d5
commit 8fe58b90c2
1 changed files with 3 additions and 0 deletions
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3
src/Format.cpp
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@ -22,6 +22,7 @@
#include "support/filetools.h"
#include "support/gettext.h"
#include "support/lstrings.h"
#include "support/mutex.h"
#include "support/os.h"
#include "support/PathChanger.h"
#include "support/Systemcall.h"
@ -479,11 +480,13 @@ struct ZippedInfo {
/// Mapping absolute pathnames of files to their ZippedInfo metadata.
static std::map<std::string, ZippedInfo> zipped_;
static Mutex zipped_mutex;
bool Formats::isZippedFile(support::FileName const & filename) const {
string const & fname = filename.absFileName();
time_t timestamp = filename.lastModified();
Mutex::Locker lock(&zipped_mutex);
map<string, ZippedInfo>::iterator it = zipped_.find(fname);
if (it != zipped_.end() && it->second.timestamp == timestamp)
return it->second.zipped;