task_ptr read(
dsn_handle_t hFile,
char* buffer,
int count,
uint64_t offset,
dsn_task_code_t callback_code,
servicelet* owner,
aio_handler callback,
int hash /*= 0*/
)
{
task_ptr tsk = new safe_task<aio_handler>(callback);
if (callback != nullptr)
tsk->add_ref(); // released in exec_aio
dsn_task_t t = dsn_file_create_aio_task(callback_code,
callback != nullptr ? safe_task<aio_handler>::exec_aio : nullptr,
tsk, hash
);
tsk->set_task_info(t);
dsn_file_read(hFile, buffer, count, offset, t, owner ? owner->tracker() : nullptr);
return tsk;
}
task_ptr create_aio_task(dsn_task_code_t callback_code, clientlet* svc, empty_callback_t, int hash)
{
task_ptr tsk = new safe_task_handle;
//do not add_ref here
dsn_task_t t = dsn_file_create_aio_task(callback_code,
nullptr,
nullptr, hash, svc ? svc->tracker() : nullptr
);
tsk->set_task_info(t);
return tsk;
}
task_ptr copy_remote_files(
const dsn_address_t& remote,
const std::string& source_dir,
std::vector<std::string>& files, // empty for all
const std::string& dest_dir,
bool overwrite,
dsn_task_code_t callback_code,
servicelet* owner,
aio_handler callback,
int hash /*= 0*/
)
{
task_ptr tsk = new safe_task<aio_handler>(callback);
if (callback != nullptr)
tsk->add_ref(); // released in exec_aio
dsn_task_t t = dsn_file_create_aio_task(callback_code,
callback != nullptr ? safe_task<aio_handler>::exec_aio : nullptr,
tsk, hash
);
tsk->set_task_info(t);
if (files.empty())
{
dsn_file_copy_remote_directory(remote, source_dir.c_str(), dest_dir.c_str(), overwrite, t, owner ? owner->tracker() : nullptr);
}
else
{
const char** ptr = (const char**)alloca(sizeof(const char*) * (files.size() + 1));
for (auto& f : files)
{
*ptr++ = f.c_str();
}
*ptr = nullptr;
dsn_file_copy_remote_files(remote, source_dir.c_str(), ptr, dest_dir.c_str(), overwrite, t, owner ? owner->tracker() : nullptr);
}
return tsk;
}
