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| Get pointer to the queue behind a given queue |
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| Test for flow control in a given priority band |
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| Test whether message is a data message |
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| Test whether thread can receive user-level signal
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| Duplicate a message block descriptor |
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| Re-allow a queue to be scheduled for service |
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| Allocate message and data blocks |
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| Flush messages in a given priority band |
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| Free all message blocks in a message |
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| Disable changes to the state of the stream |
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| Get a message from a queue |
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| Put a message at a specific place in
a queue |
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| Concatenate two messages into one |
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| Get the number of data bytes in a message |
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| Prevent a queue from being scheduled |
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| Get pointer to the queue's partner queue |
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| Concatenate and align bytes in a message |
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| Return a message to the beginning of a queue |
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| Put a control message with a one-byte parameter |
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| Put a message to the next queue |
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| Call a function when a buffer becomes available |
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| Turn off queue processing |
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| Send a message on a stream in the reverse direction |
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| Find the number of messages on a queue |
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| Execute a function after a specified length of time |
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| Cancel a pending qbufcall request |
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| Cancel a pending qtimeout request |
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| Asynchronous perimeter upgrade |
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| Get pointer to the read queue |
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| Remove a message block from a message |
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| Remove a message from a queue |
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| Submit messages for logging |
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| Obtain information on a queue or a band of the queue |
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| Change information on a queue or a band of the queue |
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| Check for an available buffer |
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| Enable changes to the state of the stream |
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| Remove a message block from the head of a message |
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| Get pointer to the write queue |