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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [redboot/] [v2_0/] [src/] [net/] [timers.c] - Rev 256
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//========================================================================== // // net/timers.c // // Stand-alone networking support for RedBoot // //========================================================================== //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later version. // // eCos is distributed in the hope that it will be useful, but WITHOUT ANY // WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License along // with eCos; if not, write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. // // As a special exception, if other files instantiate templates or use macros // or inline functions from this file, or you compile this file and link it // with other works to produce a work based on this file, this file does not // by itself cause the resulting work to be covered by the GNU General Public // License. However the source code for this file must still be made available // in accordance with section (3) of the GNU General Public License. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //========================================================================== //#####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; } } }
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