TimeUtil.hpp

1. Overview

The TimeUtil.hpp header defines a set of lightweight utility functions for retrieving the current system time in standardized formats. These functions are intended to support logging, auditing, timestamping, and time-based security operations across the application.

Functionally, this module provides:

  • Retrieval of the current Unix timestamp
  • Generation of ISO 8601–compliant date strings
  • Stateless, low-overhead time utilities
  • Consistent temporal formatting for system components

2. Dependencies and Includes

#include <string>
#include <cstdint>
  • <string> – storage of formatted date and time values
  • <cstdint> – fixed-width integer types for timestamps

3. Module Scope and Declaration

uint64_t unixNow();
std::string isoDateNow();

This module exposes free-standing utility functions in the global namespace. No class instantiation or object lifecycle management is required.

4. Public Interface

4.1 Unix Timestamp Retrieval

uint64_t unixNow();

Returns the current system time as a Unix timestamp, representing the number of seconds elapsed since January 1, 1970 (UTC).

4.2 ISO 8601 Date Generation

std::string isoDateNow();

Returns the current system date and time formatted according to the ISO 8601 standard, typically in UTC (e.g., 2026-01-26T14:32:00Z).

5. Design Characteristics

  • Stateless: functions do not maintain internal state
  • Thread-safe: safe for concurrent invocation if implemented using reentrant system APIs
  • Deterministic formatting: consistent output structure across platforms
  • Low overhead: suitable for high-frequency timestamp generation

6. Intended Use Cases

  • Event and security audit logging
  • Timestamping of configuration and data changes
  • Correlation of network and system events
  • Time-based access control and expiration checks

7. Reliability and Time Handling Considerations

  • Time source: implementations should rely on monotonic or system clocks appropriately depending on usage context
  • Time zones: output should be normalized to UTC to avoid ambiguity in distributed systems
  • Clock drift: systems should use NTP or equivalent synchronization services for accurate timestamps
  • Leap seconds: formatting logic should account for platform-specific handling of leap seconds
  • Error handling: failures in time retrieval should be detected and reported where applicable
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