ztimerset(3)
ztimerset(3)
CZMQ Manual - CZMQ/4.0.2
Name
ztimerset - timer set
Synopsis
// This is a draft class, and may change without notice. It is disabled in
// stable builds by default. If you use this in applications, please ask
// for it to be pushed to stable state. Use --enable-drafts to enable.
#ifdef CZMQ_BUILD_DRAFT_API
// Callback function for timer event.
typedef void (ztimerset_fn) (
int timer_id, void *arg);
// *** Draft method, for development use, may change without warning ***
// Create new timer set.
CZMQ_EXPORT ztimerset_t *
ztimerset_new (void);
// *** Draft method, for development use, may change without warning ***
// Destroy a timer set
CZMQ_EXPORT void
ztimerset_destroy (ztimerset_t **self_p);
// *** Draft method, for development use, may change without warning ***
// Add a timer to the set. Returns timer id if OK, -1 on failure.
CZMQ_EXPORT int
ztimerset_add (ztimerset_t *self, size_t interval, ztimerset_fn handler, void *arg);
// *** Draft method, for development use, may change without warning ***
// Cancel a timer. Returns 0 if OK, -1 on failure.
CZMQ_EXPORT int
ztimerset_cancel (ztimerset_t *self, int timer_id);
// *** Draft method, for development use, may change without warning ***
// Set timer interval. Returns 0 if OK, -1 on failure.
// This method is slow, canceling the timer and adding a new one yield better performance.
CZMQ_EXPORT int
ztimerset_set_interval (ztimerset_t *self, int timer_id, size_t interval);
// *** Draft method, for development use, may change without warning ***
// Reset timer to start interval counting from current time. Returns 0 if OK, -1 on failure.
// This method is slow, canceling the timer and adding a new one yield better performance.
CZMQ_EXPORT int
ztimerset_reset (ztimerset_t *self, int timer_id);
// *** Draft method, for development use, may change without warning ***
// Return the time until the next interval.
// Should be used as timeout parameter for the zpoller wait method.
// The timeout is in msec.
CZMQ_EXPORT int
ztimerset_timeout (ztimerset_t *self);
// *** Draft method, for development use, may change without warning ***
// Invoke callback function of all timers which their interval has elapsed.
// Should be call after zpoller wait method.
// Returns 0 if OK, -1 on failure.
CZMQ_EXPORT int
ztimerset_execute (ztimerset_t *self);
// *** Draft method, for development use, may change without warning ***
// Self test of this class.
CZMQ_EXPORT void
ztimerset_test (bool verbose);
#endif // CZMQ_BUILD_DRAFT_API
Please add '@interface' section in './../src/ztimerset.c'.
Description
ztimerset - timer set
Please add @discuss section in ./../src/ztimerset.c.
Example
From ztimerset_test method
// Simple create/destroy test
ztimerset_t *self = ztimerset_new ();
assert (self);
// Adding timer
bool timer_invoked = false;
int timer_id = ztimerset_add (self, 100, handler, &timer_invoked);
assert (timer_id != -1);
int rc = ztimerset_execute (self);
assert (rc == 0);
assert (!timer_invoked);
int timeout = ztimerset_timeout (self);
assert (timeout > 0);
zclock_sleep (timeout);
rc = ztimerset_execute (self);
assert (rc == 0);
assert (timer_invoked);
// Cancel timer
timeout = ztimerset_timeout (self);
assert (timeout > 0);
rc = ztimerset_cancel (self, timer_id);
assert (rc == 0);
timeout = ztimerset_timeout (self);
assert(timeout == -1);
// Reset a timer
timer_id = ztimerset_add (self, 100, handler, &timer_invoked);
assert (timer_id != -1);
timeout = ztimerset_timeout (self);
assert (timeout > 0);
zclock_sleep (timeout / 2);
timeout = ztimerset_timeout (self);
rc = ztimerset_reset(self, timer_id);
assert (rc == 0);
int timeout2 = ztimerset_timeout (self);
assert (timeout2 > timeout);
rc = ztimerset_cancel (self, timer_id);
assert (rc == 0);
// Set interval
timer_id = ztimerset_add (self, 100, handler, &timer_invoked);
assert (timer_id != -1);
timeout = ztimerset_timeout (self);
rc = ztimerset_set_interval(self, timer_id, 200);
timeout2 = ztimerset_timeout (self);
assert (timeout2 > timeout);
ztimerset_destroy (&self);
Authors
The czmq manual was written by the authors in the AUTHORS file.
Resources
Main web site:
Report bugs to the email <gro.qmorez.stsil|ved-qmorez#gro.qmorez.stsil|ved-qmorez>
Copyright
Copyright (c) the Contributors as noted in the AUTHORS file. This file is part of CZMQ, the high-level C binding for ØMQ: http://czmq.zeromq.org. This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/. LICENSE included with the czmq distribution.