MTCircularBuffer is a header-only C++ Library built on top of boost::thread to provide a single-producer, multiple-consumer circular buffer.
The buffer is composed by N slots. Each slot can be accessed independently with two different permission levels (Each one implemented via a corresponding C++ class):
BufferSlotWriteAccess : grants exclusive access to the slot
BufferSlotReadAccess/BufferSlotConsumeAccess: grants shared read access to the slot
Additionally, the BufferSlotConsumeAccess automatically marks a slot as "consumed" on destruction
so that the class can keep track on all the slots that contains data and were not consumed yet.
- Create a new buffer
MTCircularBuffer< int > buff(10);
- In the producer thread, acquire a BufferSlotWriteAccess to write the data
MTCircularBuffer<int>::BufferSlotWriteAccess wa;
bool overwrite;
try{
buff.write_next( wa, &overwrite ); // overwrite is se to true if the next available slot
// contains data that has was not yet consumed
// Here the slot is locked and wa can be used to write the data into
*(wa->data) = 10
} catch( MTCircularBuffer<int>::SlotAcqTimeout& ex )
{
// Exception is thrown if a timeout occurred while locking the next available slot
}
// When wa is destroyed, slot exclusive access is automatically released
- In the consumer thread, acquire a BufferSlotConsumeAccess to read and consume the data
MTCircularBuffer<int>::BufferSlotConsumeAccess ca;
bool overwrite;
try{
buff.consume_next_available( ca );
// Here the slot is locked and wa can be used to read the data
int v = *(wa->data);
} catch( MTCircularBuffer<int>::SlotAcqTimeout& ex )
{
// Exception is thrown if a timeout occurred while locking the next available slot
}
// When ca is destroyed, slot read access is automatically released and the data is consumed
The MIT License (MIT) Copyright (c) 2015 Filippo Bergamasco
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