ucc::Timer Class Reference

Timer class to use when scheduling realtime events. More...

#include <timers.h>

Inheritance diagram for ucc::Timer:
Inheritance graph
[legend]

Public Types

typedef uint64_t tick_t

Public Member Functions

void clear (void)
 Clear pending timer, has no value.
timeout_t get (void)
 Get remaining time until the timer expires.
bool isExpired (void)
 Check if timer expired.
bool isUpdated (void)
 Check if timer has been updated since last check.
 operator bool ()
 Check if timer expired for is() expression.
bool operator! ()
 Check if timer has expired.
bool operator!= (Timer &timer)
 Compare timers if not same timeout.
timeout_t operator* ()
 Get remaining time until timer expires by reference.
Timeroperator+= (timeout_t expire)
 Adjust timer expiration.
Timeroperator+= (time_t expire)
 Adjust timer expiration.
timeout_t operator- (Timer &timer)
 Compute difference between two timers.
Timeroperator-= (timeout_t expire)
 Adjust timer expiration.
Timeroperator-= (time_t expire)
 Adjust timer expiration.
bool operator< (Timer &timer)
 Compare timers if earlier timeout than another timer.
bool operator<= (Timer &timer)
 Compare timers if earlier than or equal to another timer.
Timeroperator= (timeout_t expire)
 Set timer expiration.
Timeroperator= (time_t expire)
 Set timer expiration.
bool operator== (Timer &timer)
 Compare timers if same timeout.
bool operator> (Timer &timer)
 Compare timers if later timeout than another timer.
bool operator>= (Timer &timer)
 Compare timers if later than or equal to another timer.
void set (void)
 Set (update) the timer with current time.
void set (time_t expire)
 Set the timer to expire.
void set (timeout_t expire)
 Set the timer to expire.
 Timer (Timer &copy)
 Construct a timer from a copy of another timer.
 Timer (time_t offset)
 Construct a triggered timer that expires at specified offset.
 Timer (timeout_t offset)
 Construct a triggered timer that expires at specified offset.
 Timer ()
 Construct an untriggered timer set to the time of creation.

Static Public Member Functions

static void sync (Timer &timer)
 Sleep current thread until the specified timer expires.
static tick_t ticks (void)
 Get timer ticks since uuid epoch.

Static Public Attributes

static timeout_t inf
 A value to use for infinite time.
static time_t reset
 A value to use when resetting.

Friends

class Conditional
class Event
class Semaphore

Detailed Description

Timer class to use when scheduling realtime events.

The timer generally uses millisecond values but has a microsecond accuracy. On platforms that support it, the timer uses posix realtime monotonic clock extensions, otherwise lower accuracy timer systems might be used.

Definition at line 49 of file timers.h.


Constructor & Destructor Documentation

ucc::Timer::Timer ( timeout_t  offset  ) 

Construct a triggered timer that expires at specified offset.

Parameters:
offset to expire in milliseconds.
ucc::Timer::Timer ( time_t  offset  ) 

Construct a triggered timer that expires at specified offset.

Parameters:
offset to expire in seconds.
ucc::Timer::Timer ( Timer copy  ) 

Construct a timer from a copy of another timer.

Parameters:
copy of timer to construct from.

Member Function Documentation

timeout_t ucc::Timer::get ( void   ) 

Get remaining time until the timer expires.

Returns:
0 if expired or milliseconds still waiting.

Reimplemented in ucc::TimerQueue::event.

bool ucc::Timer::isExpired ( void   ) 

Check if timer expired.

Returns:
true if expired.

Reimplemented in ucc::TimerQueue::event.

bool ucc::Timer::isUpdated ( void   ) 

Check if timer has been updated since last check.

Returns:
true if updated.
ucc::Timer::operator bool (  ) 

Check if timer expired for is() expression.

Returns:
true if timer expired.
bool ucc::Timer::operator! (  ) 

Check if timer has expired.

Returns:
true if timer still pending.
bool ucc::Timer::operator!= ( Timer timer  ) 

Compare timers if not same timeout.

Parameters:
timer to compare with.
Returns:
true if not same.
timeout_t ucc::Timer::operator* (  )  [inline]

Get remaining time until timer expires by reference.

Returns:
0 if expired or milliseconds still waiting.

Definition at line 140 of file timers.h.

Timer& ucc::Timer::operator+= ( timeout_t  expire  ) 

Adjust timer expiration.

Parameters:
expire time to add in milliseconds.
Timer& ucc::Timer::operator+= ( time_t  expire  ) 

Adjust timer expiration.

Parameters:
expire time to add in seconds.
timeout_t ucc::Timer::operator- ( Timer timer  ) 

Compute difference between two timers.

Parameters:
timer to use for difference.
Returns:
difference in milliseconds.
Timer& ucc::Timer::operator-= ( timeout_t  expire  ) 

Adjust timer expiration.

Parameters:
expire time to subtract in milliseconds.
Timer& ucc::Timer::operator-= ( time_t  expire  ) 

Adjust timer expiration.

Parameters:
expire time to subtract in seconds.
bool ucc::Timer::operator< ( Timer timer  ) 

Compare timers if earlier timeout than another timer.

Parameters:
timer to compare with.
Returns:
true if earlier.
bool ucc::Timer::operator<= ( Timer timer  ) 

Compare timers if earlier than or equal to another timer.

Parameters:
timer to compare with.
Returns:
true if earlier or same.
Timer& ucc::Timer::operator= ( timeout_t  expire  ) 

Set timer expiration.

Parameters:
expire timer in milliseconds.
Timer& ucc::Timer::operator= ( time_t  expire  ) 

Set timer expiration.

Parameters:
expire timer in specified seconds.
bool ucc::Timer::operator== ( Timer timer  ) 

Compare timers if same timeout.

Parameters:
timer to compare with.
Returns:
true if same.
bool ucc::Timer::operator> ( Timer timer  ) 

Compare timers if later timeout than another timer.

Parameters:
timer to compare with.
Returns:
true if later.
bool ucc::Timer::operator>= ( Timer timer  ) 

Compare timers if later than or equal to another timer.

Parameters:
timer to compare with.
Returns:
true if later or same.
void ucc::Timer::set ( time_t  expire  ) 

Set the timer to expire.

Parameters:
expire time in seconds.
void ucc::Timer::set ( timeout_t  expire  ) 

Set the timer to expire.

Parameters:
expire time in milliseconds.
static void ucc::Timer::sync ( Timer timer  )  [static]

Sleep current thread until the specified timer expires.

Parameters:
timer to reference for sleep.
static tick_t ucc::Timer::ticks ( void   )  [static]

Get timer ticks since uuid epoch.

Returns:
timer ticks in 100ns resolution.

The documentation for this class was generated from the following file:
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