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one/include/ActionSet.h

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/* -------------------------------------------------------------------------- */
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/* Copyright 2002-2017, OpenNebula Project, OpenNebula Systems */
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/* */
/* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
/* See the License for the specific language governing permissions and */
/* limitations under the License. */
/* -------------------------------------------------------------------------- */
#ifndef ACTION_SET_H
#define ACTION_SET_H
/**
* This class defines actions sets (for example the set of actions supported
* by the driver). Just the basic methods to initialize the set and check if a
* an action is included is provided (similar to FD_SET(3) or SIGSETOPS(3))
*
* Types should be enums with uint values.
*/
template <typename T>
class ActionSet
{
public:
ActionSet():action_set(0UL){};
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ActionSet(const T * actions, int actions_len):action_set(0)
{
for (int i=0; i<actions_len; i++)
{
set(actions[i]);
}
};
~ActionSet(){};
/* Set the action in the set */
void set(T action)
{
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action_set |= 1UL << static_cast<int>(action);
};
void clear(T action)
{
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action_set &= (~ (1UL << static_cast<int>(action)));
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};
/**
* Check if action is included in the set
* @param action
* @return true if included
*/
bool is_set(T action) const
{
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return (action_set & (1UL << static_cast<int>(action))) != 0;
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};
private:
long long action_set;
};
#endif /*ACTION_SET_H*/