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Annotation of embedaddon/iperf/src/timer.h, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * iperf, Copyright (c) 2014, The Regents of the University of
                      3:  * California, through Lawrence Berkeley National Laboratory (subject
                      4:  * to receipt of any required approvals from the U.S. Dept. of
                      5:  * Energy).  All rights reserved.
                      6:  *
                      7:  * If you have questions about your rights to use or distribute this
                      8:  * software, please contact Berkeley Lab's Technology Transfer
                      9:  * Department at TTD@lbl.gov.
                     10:  *
                     11:  * NOTICE.  This software is owned by the U.S. Department of Energy.
                     12:  * As such, the U.S. Government has been granted for itself and others
                     13:  * acting on its behalf a paid-up, nonexclusive, irrevocable,
                     14:  * worldwide license in the Software to reproduce, prepare derivative
                     15:  * works, and perform publicly and display publicly.  Beginning five
                     16:  * (5) years after the date permission to assert copyright is obtained
                     17:  * from the U.S. Department of Energy, and subject to any subsequent
                     18:  * five (5) year renewals, the U.S. Government is granted for itself
                     19:  * and others acting on its behalf a paid-up, nonexclusive,
                     20:  * irrevocable, worldwide license in the Software to reproduce,
                     21:  * prepare derivative works, distribute copies to the public, perform
                     22:  * publicly and display publicly, and to permit others to do so.
                     23:  *
                     24:  * This code is distributed under a BSD style license, see the LICENSE
                     25:  * file for complete information.
                     26:  *
                     27:  * Based on timers.h by Jef Poskanzer. Used with permission.
                     28:  */
                     29: 
                     30: #ifndef __TIMER_H
                     31: #define __TIMER_H
                     32: 
                     33: #include <sys/time.h>
                     34: 
                     35: /* TimerClientData is an opaque value that tags along with a timer.  The
                     36: ** client can use it for whatever, and it gets passed to the callback when
                     37: ** the timer triggers.
                     38: */
                     39: typedef union
                     40: {
                     41:     void* p;
                     42:     int i;
                     43:     long l;
                     44: } TimerClientData;
                     45: 
                     46: extern TimerClientData JunkClientData; /* for use when you don't care */
                     47: 
                     48: /* The TimerProc gets called when the timer expires.  It gets passed
                     49: ** the TimerClientData associated with the timer, and a timeval in case
                     50: ** it wants to schedule another timer.
                     51: */
                     52: typedef void TimerProc( TimerClientData client_data, struct timeval* nowP );
                     53: 
                     54: /* The Timer struct. */
                     55: typedef struct TimerStruct
                     56: {
                     57:     TimerProc* timer_proc;
                     58:     TimerClientData client_data;
                     59:     int64_t usecs;
                     60:     int periodic;
                     61:     struct timeval time;
                     62:     struct TimerStruct* prev;
                     63:     struct TimerStruct* next;
                     64:     int hash;
                     65: } Timer;
                     66: 
                     67: /* Set up a timer, either periodic or one-shot. Returns (Timer*) 0 on errors. */
                     68: extern Timer* tmr_create(
                     69:     struct timeval* nowP, TimerProc* timer_proc, TimerClientData client_data,
                     70:     int64_t usecs, int periodic );
                     71: 
                     72: /* Returns a timeout indicating how long until the next timer triggers.  You
                     73: ** can just put the call to this routine right in your select().  Returns
                     74: ** (struct timeval*) 0 if no timers are pending.
                     75: */
                     76: extern struct timeval* tmr_timeout( struct timeval* nowP ) /* __attribute__((hot)) */;
                     77: 
                     78: /* Run the list of timers. Your main program needs to call this every so often,
                     79: ** or as indicated by tmr_timeout().
                     80: */
                     81: extern void tmr_run( struct timeval* nowP ) /* __attribute__((hot)) */;
                     82: 
                     83: /* Reset the clock on a timer, to current time plus the original timeout. */
                     84: extern void tmr_reset( struct timeval* nowP, Timer* timer );
                     85: 
                     86: /* Deschedule a timer.  Note that non-periodic timers are automatically
                     87: ** descheduled when they run, so you don't have to call this on them.
                     88: */
                     89: extern void tmr_cancel( Timer* timer );
                     90: 
                     91: /* Clean up the timers package, freeing any unused storage. */
                     92: extern void tmr_cleanup( void );
                     93: 
                     94: /* Cancel all timers and free storage, usually in preparation for exiting. */
                     95: extern void tmr_destroy( void );
                     96: 
                     97: #endif /* __TIMER_H */