mirror of
https://github.com/ntop/ntopng.git
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99 lines
2.5 KiB
C++
99 lines
2.5 KiB
C++
/*
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*
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* (C) 2014-22 - ntop.org
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#ifndef _FIFO_QUEUE_H
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#define _FIFO_QUEUE_H
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#include "ntop_includes.h"
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template <typename T> class FifoQueue {
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protected:
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Mutex m;
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std::queue<T> q;
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u_int32_t max_size;
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u_int64_t num_enqueued, num_not_enqueued, num_dequeued;
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public:
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FifoQueue(u_int32_t queue_size) {
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max_size = queue_size;
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num_enqueued = num_not_enqueued = num_dequeued = 0;
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}
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virtual ~FifoQueue() { ; }
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/*
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Subclasses might override this as sometimes the buffer
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needs to be duplicated as for strings
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*/
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bool enqueue(T item) {
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bool rv;
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m.lock(__FILE__, __LINE__);
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if(canEnqueue()) {
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q.push(item);
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rv = true;
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} else
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rv = false;
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if(rv)
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num_enqueued++;
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else
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num_not_enqueued++;
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m.unlock(__FILE__, __LINE__);
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return(rv);
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}
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T dequeue() {
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T rv;
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m.lock(__FILE__, __LINE__);
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if(q.empty())
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rv = static_cast<T>(NULL);
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else {
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rv = q.front();
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q.pop();
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num_dequeued++;
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}
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m.unlock(__FILE__, __LINE__);
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return(rv);
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}
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inline bool canEnqueue() { return(getLength() < max_size); }
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inline u_int32_t getLength() { return(q.size()); }
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inline bool empty() { return(q.empty()); }
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inline u_int8_t fillPct() { return (num_enqueued - num_dequeued) / (float)(max_size + 1) * 100; };
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inline void lua(lua_State* vm, const char * table_name) {
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lua_newtable(vm);
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/* The percentage of not enqueued, with reference to the total number of not enqueued plus enqueued */
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lua_push_uint64_table_entry(vm, "pct_not_enqueued", num_not_enqueued / (float)(num_not_enqueued + num_enqueued + 1) * 100);
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lua_pushstring(vm, table_name);
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lua_insert(vm, -2);
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lua_settable(vm, -3);
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}
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};
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#endif /* _FIFO_QUEUE_H */
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