CubicSDR/src/IOThread.h
2015-09-09 23:29:38 -04:00

122 lines
3.0 KiB
C++

#pragma once
#include <mutex>
#include <atomic>
#include <deque>
#include <map>
#include <string>
#include <iostream>
#include "ThreadQueue.h"
#include "Timer.h"
struct map_string_less : public std::binary_function<std::string,std::string,bool>
{
bool operator()(const std::string& a,const std::string& b) const
{
return a.compare(b) < 0;
}
};
class ReferenceCounter {
public:
mutable std::mutex m_mutex;
void setRefCount(int rc) {
refCount.store(rc);
}
void decRefCount() {
refCount.store(refCount.load()-1);
}
int getRefCount() {
return refCount.load();
}
protected:
std::atomic_int refCount;
};
#define REBUFFER_GC_LIMIT 100
template<class BufferType = ReferenceCounter>
class ReBuffer {
public:
BufferType *getBuffer() {
BufferType* buf = NULL;
for (outputBuffersI = outputBuffers.begin(); outputBuffersI != outputBuffers.end(); outputBuffersI++) {
if (!buf && (*outputBuffersI)->getRefCount() <= 0) {
buf = (*outputBuffersI);
(*outputBuffersI)->setRefCount(0);
} else if ((*outputBuffersI)->getRefCount() <= 0) {
(*outputBuffersI)->decRefCount();
}
}
if (buf) {
if (outputBuffers.back()->getRefCount() < -REBUFFER_GC_LIMIT) {
BufferType *ref = outputBuffers.back();
outputBuffers.pop_back();
delete ref;
}
return buf;
}
// if (outputBuffers.size() > 100) {
// std::cout << "Buffer over 100.." << std::endl;
// }
buf = new BufferType();
outputBuffers.push_back(buf);
return buf;
}
void purge() {
while (!outputBuffers.empty()) {
BufferType *ref = outputBuffers.front();
outputBuffers.pop_front();
delete ref;
}
}
private:
std::deque<BufferType*> outputBuffers;
typename std::deque<BufferType*>::iterator outputBuffersI;
};
class IOThread {
public:
IOThread();
virtual ~IOThread();
static void *pthread_helper(void *context);
#ifdef __APPLE__
virtual void *threadMain();
#else
virtual void threadMain();
#endif
virtual void setup();
virtual void run();
virtual void terminate();
bool isTerminated();
virtual void onBindOutput(std::string name, ThreadQueueBase* threadQueue);
virtual void onBindInput(std::string name, ThreadQueueBase* threadQueue);
void setInputQueue(std::string qname, ThreadQueueBase *threadQueue);
void *getInputQueue(std::string qname);
void setOutputQueue(std::string qname, ThreadQueueBase *threadQueue);
void *getOutputQueue(std::string qname);
protected:
std::map<std::string, ThreadQueueBase *, map_string_less> input_queues;
std::map<std::string, ThreadQueueBase *, map_string_less> output_queues;
std::atomic_bool terminated;
Timer gTimer;
};