policy_cache.cpp

src/policy_cache.cpp

@@ -1,131 +0,0 @@
-#include "policy_cache.hpp"
-
-#include <cstdlib>
-#include <map>
-#include <string>
-
-#include <time.h>
-
-using std::map;
-using std::string;
-
-static const uint64_t DEFAULT_TIMEOUT = 0;
-
-namespace l
-{
-  static
-  uint64_t
-  get_time(void)
-  {
-    uint64_t rv;
-
-    rv = ::time(NULL);
-
-    return rv;
-  }
-}
-
-
-PolicyCache::Value::Value()
-  : time(0),
-    paths()
-{
-
-}
-
-PolicyCache::PolicyCache(void)
-  : timeout(DEFAULT_TIMEOUT)
-{
-  pthread_mutex_init(&_lock,NULL);
-}
-
-void
-PolicyCache::erase(const char *fusepath_)
-{
-  if(timeout == 0)
-    return;
-
-  pthread_mutex_lock(&_lock);
-
-  _cache.erase(fusepath_);
-
-  pthread_mutex_unlock(&_lock);
-}
-
-void
-PolicyCache::cleanup(const int prob_)
-{
-  uint64_t now;
-  map<string,Value>::iterator i;
-
-  if(timeout == 0)
-    return;
-
-  if(rand() % prob_)
-    return;
-
-  now = l::get_time();
-
-  pthread_mutex_lock(&_lock);
-
-  i = _cache.begin();
-  while(i != _cache.end())
-    {
-      if((now - i->second.time) >= timeout)
-        _cache.erase(i++);
-      else
-        ++i;
-    }
-
-  pthread_mutex_unlock(&_lock);
-}
-
-void
-PolicyCache::clear(void)
-{
-  pthread_mutex_lock(&_lock);
-
-  _cache.clear();
-
-  pthread_mutex_unlock(&_lock);
-}
-
-int
-PolicyCache::operator()(const Policy::Search &policy_,
-                        const Branches       &branches_,
-                        const char           *fusepath_,
-                        StrVec               *paths_)
-{
-  int rv;
-  Value *v;
-  uint64_t now;
-
-  if(timeout == 0)
-    return policy_(branches_,fusepath_,paths_);
-
-  now = l::get_time();
-
-  pthread_mutex_lock(&_lock);
-  v = &_cache[fusepath_];
-
-  if((now - v->time) >= timeout)
-    {
-      pthread_mutex_unlock(&_lock);
-
-      rv = policy_(branches_,fusepath_,paths_);
-      if(rv == -1)
-        return -1;
-
-      pthread_mutex_lock(&_lock);
-      v->time  = now;
-      v->paths = *paths_;
-    }
-  else
-    {
-      *paths_ = v->paths;
-    }
-
-  pthread_mutex_unlock(&_lock);
-
-  return 0;
-}