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#pragma once
#include <systemd/sd-event.h>
#include <experimental/filesystem>
#include <functional>
#include <map>
namespace phosphor
{
namespace software
{
namespace manager
{
namespace fs = std::experimental::filesystem;
/** @class SyncWatch
*
* @brief Adds inotify watch on persistent files to be synced
*
* The inotify watch is hooked up with sd-event, so that on call back,
* appropriate actions related to syncing files can be taken.
*/
class SyncWatch
{
public:
/** @brief ctor - hook inotify watch with sd-event
*
* @param[in] loop - sd-event object
* @param[in] syncCallback - The callback function for processing
* files
*/
SyncWatch(sd_event& loop, std::function<int(int, fs::path&)> syncCallback);
SyncWatch(const SyncWatch&) = delete;
SyncWatch& operator=(const SyncWatch&) = delete;
SyncWatch(SyncWatch&&) = default;
SyncWatch& operator=(SyncWatch&&) = default;
/** @brief dtor - remove inotify watch and close fd's
*/
~SyncWatch();
private:
/** @brief sd-event callback
*
* @param[in] s - event source, floating (unused) in our case
* @param[in] fd - inotify fd
* @param[in] revents - events that matched for fd
* @param[in] userdata - pointer to SyncWatch object
* @returns 0 on success, -1 on fail
*/
static int callback(sd_event_source* s, int fd, uint32_t revents,
void* userdata);
/** @brief Adds an inotify watch to the specified file or directory path
*
* @param[in] path - The path to the file or directory
*/
void addInotifyWatch(const fs::path& path);
/** @brief Map of file descriptors, watch descriptors, and file paths */
using fd = int;
using wd = int;
fd inotifyFd;
std::map<wd, fs::path> fileMap;
/** @brief The callback function for processing the inotify event */
std::function<int(int, fs::path&)> syncCallback;
/** @brief Persistent sd_event loop */
sd_event& loop;
};
} // namespace manager
} // namespace software
} // namespace phosphor
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