Somewhat generic queue processing class to establish a producer consumer queue.
#include <buffer.h>
Inherits ost::Mutex, ost::Thread, and ost::Semaphore.
struct _data
ThreadQueue (const char *id, int pri, size_t stack=0)
Create instance of our queue and give it a process priority. virtual ~ThreadQueue ()
Destroy the queue. void setTimer (timeout_t timeout)
Set the queue timeout. void post (const void *data, unsigned len)
Put some unspecified data into this queue.
typedef struct
ost::ThreadQueue::_data data_t"
virtual void final ()
virtual void startQueue (void)
Start of dequeing. virtual void stopQueue (void)
End of dequeing, we expect the queue is empty for now. virtual void onTimer (void)
A derivable method to call when the timout is expired. virtual void runQueue (void *data)=0
Virtual callback method to handle processing of a queued data items.
timeout_t timeout
bool started
data_t * first
data_t * last
String name
Somewhat generic queue processing class to establish a producer consumer queue.
This may be used to buffer cdr records, or for other purposes where an in-memory queue is needed for rapid posting. This class is derived from Mutex and maintains a linked list. A thread is used to dequeue data and pass it to a callback method that is used in place of 'run' for each item present on the queue. The conditional is used to signal the run thread when new data is posted.
This class was changed by Angelo Naselli to have a timeout on the queue
in memory data queue interface.
Author:
David Sugar [email protected]
Create instance of our queue and give it a process priority.
Parameters:
id queue ID.
pri process priority.
stack stack size.
Destroy the queue.
Reimplemented from ost::Thread.
A derivable method to call when the timout is expired.
Put some unspecified data into this queue. A new qd structure is created and sized to contain a copy of the actual content.
Parameters:
data pointer to data.
len size of data.
Virtual callback method to handle processing of a queued data items. After the item is processed, it is deleted from memory. We can call multiple instances of runQueue in order if multiple items are waiting.
Parameters:
data item being dequed.
Set the queue timeout. When the timer expires, the onTimer() method is called for the thread
Parameters:
timeout timeout in milliseconds.
Start of dequeing. Maybe we need to connect a database or something, so we have a virtual...
End of dequeing, we expect the queue is empty for now. Maybe we need to disconnect a database or something, so we have another virtual.
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