mytime.c File Reference

Time handling functions. More...

#include "private.h"
#include <sys/time.h>

Go to the source code of this file.

Functions
static uint64_t	mytime_now (void)
	Get the current time as milliseconds. More...
void	mytime_set_start_time (void)
	Store the time when (de)compression was started. More...
uint64_t	mytime_get_elapsed (void)
	Get the number of milliseconds since the operation started. More...
void	mytime_set_flush_time (void)
	Store the time of when compressor was flushed. More...
int	mytime_get_flush_timeout (void)
	Get the number of milliseconds until the next flush. More...

Variables
uint64_t	opt_flush_timeout = 0
	Number of milliseconds to between LZMA_SYNC_FLUSHes. More...
static uint64_t	start_time
static uint64_t	next_flush

Detailed Description

Time handling functions.

Definition in file mytime.c.

Function Documentation

mytime_get_elapsed()

uint64_t mytime_get_elapsed

(

void

)

Get the number of milliseconds since the operation started.

Definition at line 59 of file mytime.c.

{
    return mytime_now() - start_time;
}

References mytime_now(), and start_time.

Referenced by message_progress_update(), and progress_flush().

mytime_get_flush_timeout()

int mytime_get_flush_timeout

(

void

)

Get the number of milliseconds until the next flush.

This returns -1 if no timed flushing is used.

The return value is intended for use with poll().

Definition at line 74 of file mytime.c.

{
    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;
}

References int, INT_MAX, MODE_COMPRESS, mytime_now(), next_flush, opt_flush_timeout, and opt_mode.

Referenced by io_read().

mytime_now()

static uint64_t mytime_now ( void  )

static

Get the current time as milliseconds.

It's relative to some point but not necessarily to the UNIX Epoch.

Definition at line 29 of file mytime.c.

{
    // NOTE: HAVE_DECL_CLOCK_MONOTONIC is always defined to 0 or 1.
#if defined(HAVE_CLOCK_GETTIME) && HAVE_DECL_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
}

References gettimeofday, NULL, and tv.

Referenced by mytime_get_elapsed(), mytime_get_flush_timeout(), mytime_set_flush_time(), and mytime_set_start_time().

mytime_set_flush_time()

void mytime_set_flush_time

(

void

)

Store the time of when compressor was flushed.

Definition at line 66 of file mytime.c.

{
    next_flush = mytime_now() + opt_flush_timeout;
    return;
}

References mytime_now(), next_flush, and opt_flush_timeout.

Referenced by io_read().

mytime_set_start_time()

void mytime_set_start_time

(

void

)

Store the time when (de)compression was started.

The start time is also stored as the time of the first flush.

Definition at line 51 of file mytime.c.

{
    start_time = mytime_now();
    return;
}

References mytime_now(), and start_time.

Referenced by coder_run().

Variable Documentation

next_flush

uint64_t next_flush

static

Definition at line 22 of file mytime.c.

Referenced by mytime_get_flush_timeout(), and mytime_set_flush_time().

opt_flush_timeout

uint64_t opt_flush_timeout = 0

Number of milliseconds to between LZMA_SYNC_FLUSHes.

If 0, timed flushing is disabled. Otherwise if no more input is available and not at the end of the file and at least opt_flush_timeout milliseconds has elapsed since the start of compression or the previous flushing (LZMA_SYNC_FLUSH or LZMA_FULL_FLUSH), set LZMA_SYNC_FLUSH to flush the pending data.

Definition at line 19 of file mytime.c.

Referenced by coder_init(), mytime_get_flush_timeout(), mytime_set_flush_time(), and parse_real().

start_time

uint64_t start_time

static

Definition at line 21 of file mytime.c.

Referenced by mytime_get_elapsed(), mytime_set_start_time(), and rz_test_run_test().