Mercurial > ecos
diff packages/redboot/current/src/net/timers.c @ 115:6ed91473a1cd ecos-sw-2000-08-21
Merge from eCos master repository on 2000-08-21-22:40:54-BST
| author | jlarmour |
|---|---|
| date | Fri, 25 Aug 2000 17:32:38 +0000 |
| parents | |
| children | e0c0827131d1 |
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new file mode 100644 --- /dev/null +++ b/packages/redboot/current/src/net/timers.c @@ -0,0 +1,126 @@ +//========================================================================== +// +// net/timers.c +// +// Stand-alone networking support for RedBoot +// +//========================================================================== +//####COPYRIGHTBEGIN#### +// +// ------------------------------------------- +// The contents of this file are subject to the Red Hat eCos Public License +// Version 1.1 (the "License"); you may not use this file except in +// compliance with the License. You may obtain a copy of the License at +// http://www.redhat.com/ +// +// Software distributed under the License is distributed on an "AS IS" +// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the +// License for the specific language governing rights and limitations under +// the License. +// +// The Original Code is eCos - Embedded Configurable Operating System, +// released September 30, 1998. +// +// The Initial Developer of the Original Code is Red Hat. +// Portions created by Red Hat are +// Copyright (C) 1998, 1999, 2000 Red Hat, Inc. +// All Rights Reserved. +// ------------------------------------------- +// +//####COPYRIGHTEND#### +//========================================================================== +//#####DESCRIPTIONBEGIN#### +// +// Author(s): gthomas +// Contributors: gthomas +// Date: 2000-07-14 +// Purpose: +// Description: +// +// This code is part of RedBoot (tm). +// +//####DESCRIPTIONEND#### +// +//========================================================================== + +#include <net/net.h> + +static timer_t *tmr_list; + + +/* + * Set a timer. Caller is responsible for providing the timer_t struct. + */ +void +__timer_set(timer_t *t, unsigned long delay, + tmr_handler_t handler, void *user_data) +{ + timer_t *p; + + t->delay = delay; + t->start = MS_TICKS(); + t->handler = handler; + t->user_data = user_data; + + for (p = tmr_list; p; p = p->next) + if (p == t) { + return; + } + + t->next = tmr_list; + tmr_list = t; +} + + +/* + * Remove a given timer from timer list. + */ +void +__timer_cancel(timer_t *t) +{ + timer_t *prev, *p; + + for (prev = NULL, p = tmr_list; p; prev = p, p = p->next) + if (p == t) { + if (prev) + prev->next = p->next; + else + tmr_list = p->next; + return; + } +} + + +/* + * Poll timer list for timer expirations. + */ +void +__timer_poll(void) +{ + timer_t *prev, *t; + + prev = NULL; + t = tmr_list; + while (t) { + if ((MS_TICKS() - t->start) >= t->delay) { + + /* remove it before calling handler */ + if (prev) + prev->next = t->next; + else + tmr_list = t->next; + /* now, call the handler */ + t->handler(t->user_data); + + /* + * handler may be time consuming, so start + * from beginning of list. + */ + prev = NULL; + t = tmr_list; + } else { + prev = t; + t = t->next; + } + } +}
