Stxxl
1.3.1
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Encapsulates asynchronous buffered block writing engine. More...
#include <buf_writer.h>
Public Member Functions | |
buffered_writer (unsigned_type write_buf_size, unsigned_type write_batch_size) | |
Constructs an object. | |
block_type * | get_free_block () |
Returns free block from the internal buffer pool. | |
block_type * | write (block_type *filled_block, const bid_type &bid) |
Submits block for writing. | |
void | flush () |
Flushes not yet written buffers. | |
virtual | ~buffered_writer () |
Flushes not yet written buffers and frees used memory. |
Protected Types | |
typedef block_type::bid_type | bid_type |
typedef std::priority_queue < batch_entry, std::vector < batch_entry > , batch_entry_cmp > | batch_type |
Protected Attributes | |
const unsigned_type | nwriteblocks |
block_type * | write_buffers |
bid_type * | write_bids |
request_ptr * | write_reqs |
const unsigned_type | writebatchsize |
std::vector< int_type > | free_write_blocks |
std::vector< int_type > | busy_write_blocks |
batch_type | batch_write_blocks |
Encapsulates asynchronous buffered block writing engine.
buffered_writer
overlaps I/Os with filling of output buffer.
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inline |
Constructs an object.
write_buf_size | number of write buffers to use |
write_batch_size | number of blocks to accumulate in order to flush write requests (bulk buffered writing) |
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inlinevirtual |
Flushes not yet written buffers and frees used memory.
References request_interface::wait().
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inline |
Flushes not yet written buffers.
References request_interface::wait().
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inline |
Returns free block from the internal buffer pool.
References request_interface::poll(), and wait_any().
Referenced by buffered_writer< block_type >::write().
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inline |
Submits block for writing.
filled_block | pointer to the block |
filled_block
must be value returned by get_free_block()
or write()
methods bid | block identifier, a place to write data of the filled_block |
References buffered_writer< block_type >::get_free_block(), and request_interface::wait().