79 lines
1.4 KiB
C++
79 lines
1.4 KiB
C++
#ifndef BLOCK_CACHE_COPIER_H
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#define BLOCK_CACHE_COPIER_H
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#include "block-cache/io_engine.h"
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#include "block-cache/mem_pool.h"
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#include <string>
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#include <list>
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#include <map>
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//----------------------------------------------------------------
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namespace bcache {
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using block_address = uint64_t;
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struct copy_op {
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copy_op()
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: read_complete(false),
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write_complete(false) {
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}
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block_address src_b, src_e;
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block_address dest_b;
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bool read_complete;
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bool write_complete;
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};
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class copy_job {
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public:
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copy_job(copy_op const &op_, void *data_)
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: op(op_), data(data_) {
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}
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copy_op op;
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void *data;
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};
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class copier {
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public:
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copier(std::string const &src, std::string const &dest,
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sector_t block_size, size_t mem);
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sector_t get_block_size() const {
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return block_size_;
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}
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// Blocks if out of memory.
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void issue(copy_op const &op);
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unsigned nr_pending() const;
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boost::optional<copy_op> wait();
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private:
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void wait_();
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void complete(copy_job const &j);
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sector_t to_sector(block_address b) const;
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unsigned genkey();
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mempool pool_;
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sector_t block_size_;
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unsigned nr_blocks_;
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io_engine engine_;
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io_engine::handle src_handle_;
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io_engine::handle dest_handle_;
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unsigned genkey_count_;
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using job_map = std::map<unsigned, copy_job>;
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using op_list = std::list<copy_op>;
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job_map jobs_;
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op_list complete_;
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};
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}
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//----------------------------------------------------------------
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#endif
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