91 lines
1.6 KiB
C++
91 lines
1.6 KiB
C++
//
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// libtgvoip is free and unencumbered public domain software.
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// For more information, see http://unlicense.org or the UNLICENSE file
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// you should have received with this source code distribution.
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//
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#ifndef LIBTGVOIP_BLOCKINGQUEUE_H
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#define LIBTGVOIP_BLOCKINGQUEUE_H
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#include <stdlib.h>
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#include <list>
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#include "threading.h"
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#include "utils.h"
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namespace tgvoip{
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template<typename T>
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class BlockingQueue{
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public:
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TGVOIP_DISALLOW_COPY_AND_ASSIGN(BlockingQueue);
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BlockingQueue(size_t capacity) : semaphore(capacity, 0){
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this->capacity=capacity;
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overflowCallback=NULL;
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};
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~BlockingQueue(){
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semaphore.Release();
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}
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void Put(T thing){
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MutexGuard sync(mutex);
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queue.push_back(std::move(thing));
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bool didOverflow=false;
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while(queue.size()>capacity){
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didOverflow=true;
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if(overflowCallback){
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overflowCallback(std::move(queue.front()));
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queue.pop_front();
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}else{
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abort();
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}
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}
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if(!didOverflow)
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semaphore.Release();
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}
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T GetBlocking(){
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semaphore.Acquire();
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MutexGuard sync(mutex);
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return GetInternal();
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}
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T Get(){
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MutexGuard sync(mutex);
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if(queue.size()>0)
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semaphore.Acquire();
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return GetInternal();
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}
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unsigned int Size(){
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return queue.size();
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}
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void PrepareDealloc(){
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}
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void SetOverflowCallback(void (*overflowCallback)(T)){
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this->overflowCallback=overflowCallback;
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}
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private:
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T GetInternal(){
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//if(queue.size()==0)
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// return NULL;
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T r=std::move(queue.front());
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queue.pop_front();
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return r;
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}
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std::list<T> queue;
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size_t capacity;
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//tgvoip_lock_t lock;
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Semaphore semaphore;
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Mutex mutex;
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void (*overflowCallback)(T);
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};
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}
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#endif //LIBTGVOIP_BLOCKINGQUEUE_H
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