117 lines
2.6 KiB
C++
117 lines
2.6 KiB
C++
#include "thin-provisioning/shared_library_emitter.h"
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#include <dlfcn.h>
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#include <stdexcept>
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using namespace std;
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using namespace thin_provisioning;
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//----------------------------------------------------------------
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struct shared_object {
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public:
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shared_object(const char *shared_lib) {
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handle_ = dlopen(shared_lib, RTLD_LAZY);
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if (!handle_)
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throw runtime_error(dlerror());
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dlerror(); // Clear any existing error
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}
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virtual ~shared_object() {
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dlclose(handle_);
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}
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void *get_symbol(const char *symbol) {
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void *sym = dlsym(handle_, symbol);
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char *error = dlerror();
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if (error)
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throw runtime_error(error);
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return sym;
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}
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void *handle_;
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};
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class shared_emitter : public emitter {
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public:
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shared_emitter(const char *shared_lib, ostream &out): sobj_(shared_lib) {
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emitter::ptr (*create_fn)(ostream &out);
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create_fn = reinterpret_cast<emitter::ptr (*)(ostream &)>(
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sobj_.get_symbol("create_emitter"));
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inner_ = create_fn(out);
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}
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virtual ~shared_emitter() {
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}
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void begin_superblock(std::string const &uuid,
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uint64_t time,
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uint64_t trans_id,
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boost::optional<uint32_t> flags,
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boost::optional<uint32_t> version,
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uint32_t data_block_size,
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uint64_t nr_data_blocks,
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boost::optional<uint64_t> metadata_snap) {
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inner_->begin_superblock(uuid,
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time,
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trans_id,
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flags,
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version,
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data_block_size,
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nr_data_blocks,
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metadata_snap);
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}
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void end_superblock() {
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inner_->end_superblock();
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}
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void begin_device(uint32_t dev_id,
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uint64_t mapped_blocks,
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uint64_t trans_id,
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uint64_t creation_time,
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uint64_t snap_time) {
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inner_->begin_device(dev_id, mapped_blocks, trans_id, creation_time, snap_time);
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}
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void end_device() {
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inner_->end_device();
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}
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void begin_named_mapping(std::string const &name) {
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inner_->begin_named_mapping(name);
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}
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void end_named_mapping() {
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inner_->end_named_mapping();
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}
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void identifier(std::string const &name) {
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inner_->identifier(name);
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}
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void range_map(uint64_t origin_begin, uint64_t data_begin, uint32_t time, uint64_t len) {
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inner_->range_map(origin_begin, data_begin, time, len);
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}
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void single_map(uint64_t origin_block, uint64_t data_block, uint32_t time) {
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inner_->single_map(origin_block, data_block, time);
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}
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shared_object sobj_;
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emitter::ptr inner_;
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};
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//----------------------------------------------------------------
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emitter::ptr
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thin_provisioning::create_custom_emitter(string const &shared_lib, ostream &out)
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{
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return emitter::ptr(new shared_emitter(shared_lib.c_str(), out));
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}
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//----------------------------------------------------------------
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