/////////////////////////////////////////////////////////////////////////////// // /// \file mytime.c /// \brief Time handling functions // // Author: Lasse Collin // // This file has been put into the public domain. // You can do whatever you want with this file. // /////////////////////////////////////////////////////////////////////////////// #include "private.h" #if !(defined(HAVE_CLOCK_GETTIME) && defined(HAVE_CLOCK_MONOTONIC)) # include #endif uint64_t opt_flush_timeout = 0; static uint64_t start_time; static uint64_t next_flush; /// \brief Get the current time as milliseconds /// /// It's relative to some point but not necessarily to the UNIX Epoch. static uint64_t mytime_now(void) { #if defined(HAVE_CLOCK_GETTIME) && defined(HAVE_CLOCK_MONOTONIC) // If CLOCK_MONOTONIC was available at compile time but for some // reason isn't at runtime, fallback to CLOCK_REALTIME which // according to POSIX is mandatory for all implementations. static clockid_t clk_id = CLOCK_MONOTONIC; struct timespec tv; while (clock_gettime(clk_id, &tv)) clk_id = CLOCK_REALTIME; return (uint64_t)tv.tv_sec * 1000 + (uint64_t)(tv.tv_nsec / 1000000); #else struct timeval tv; gettimeofday(&tv, NULL); return (uint64_t)tv.tv_sec * 1000 + (uint64_t)(tv.tv_usec / 1000); #endif } extern void mytime_set_start_time(void) { start_time = mytime_now(); return; } extern uint64_t mytime_get_elapsed(void) { return mytime_now() - start_time; } extern void mytime_set_flush_time(void) { next_flush = mytime_now() + opt_flush_timeout; return; } extern int mytime_get_flush_timeout(void) { if (opt_flush_timeout == 0 || opt_mode != MODE_COMPRESS) return -1; const uint64_t now = mytime_now(); if (now >= next_flush) return 0; const uint64_t remaining = next_flush - now; return remaining > INT_MAX ? INT_MAX : (int)remaining; }