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Diffstat (limited to 'nuttx/sched/timer_create.c')
| -rw-r--r-- | nuttx/sched/timer_create.c | 237 |
1 files changed, 0 insertions, 237 deletions
diff --git a/nuttx/sched/timer_create.c b/nuttx/sched/timer_create.c deleted file mode 100644 index edfb01080..000000000 --- a/nuttx/sched/timer_create.c +++ /dev/null @@ -1,237 +0,0 @@ -/******************************************************************************** - * sched/timer_create.c - * - * Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * 3. Neither the name NuttX nor the names of its contributors may be - * used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - ********************************************************************************/ - -/******************************************************************************** - * Included Files - ********************************************************************************/ - -#include <nuttx/config.h> - -#include <stdint.h> -#include <unistd.h> -#include <time.h> -#include <string.h> -#include <wdog.h> -#include <errno.h> - -#include <nuttx/kmalloc.h> - -#include "timer_internal.h" - -#ifndef CONFIG_DISABLE_POSIX_TIMERS - -/******************************************************************************** - * Definitions - ********************************************************************************/ - -/******************************************************************************** - * Private Data - ********************************************************************************/ - -/******************************************************************************** - * Public Data - ********************************************************************************/ - -/******************************************************************************** - * Private Functions - ********************************************************************************/ - -/******************************************************************************** - * Name: timer_allocate - * - * Description: - * Allocate one POSIX timer and place it into the allocated timer list. - * - ********************************************************************************/ - -static struct posix_timer_s *timer_allocate(void) -{ - struct posix_timer_s *ret; - irqstate_t flags; - uint8_t pt_flags; - - /* Try to get a preallocated timer from the free list */ - -#if CONFIG_PREALLOC_TIMERS > 0 - flags = irqsave(); - ret = (struct posix_timer_s*)sq_remfirst((sq_queue_t*)&g_freetimers); - irqrestore(flags); - - /* Did we get one? */ - - if (ret) - { - pt_flags = PT_FLAGS_PREALLOCATED; - } - else -#endif - { - /* Allocate a new timer from the heap */ - - ret = (struct posix_timer_s*)kmalloc(sizeof(struct posix_timer_s)); - pt_flags = 0; - } - - /* If we have a timer, then put it into the allocated timer list */ - - if (ret) - { - /* Initialize the timer structure */ - - memset(ret, 0, sizeof(struct posix_timer_s)); - ret->pt_flags = pt_flags; - - /* And add it to the end of the list of allocated timers */ - - flags = irqsave(); - sq_addlast((sq_entry_t*)ret, (sq_queue_t*)&g_alloctimers); - irqrestore(flags); - } - - return ret; -} - -/******************************************************************************** - * Public Functions - ********************************************************************************/ - -/******************************************************************************** - * Name: timer_create - * - * Description: - * The timer_create() function creates per-thread timer using the specified - * clock, clock_id, as the timing base. The timer_create() function returns, in - * the location referenced by timerid, a timer ID of type timer_t used to identify - * the timer in timer requests. This timer ID is unique until the timer is - * deleted. The particular clock, clock_id, is defined in <time.h>. The timer - * whose ID is returned will be in a disarmed state upon return from - * timer_create(). - * - * The evp argument, if non-NULL, points to a sigevent structure. This structure - * is allocated by the called and defines the asynchronous notification to occur. - * If the evp argument is NULL, the effect is as if the evp argument pointed to - * a sigevent structure with the sigev_notify member having the value SIGEV_SIGNAL, - * the sigev_signo having a default signal number, and the sigev_value member - * having the value of the timer ID. - * - * Each implementation defines a set of clocks that can be used as timing bases - * for per-thread timers. All implementations shall support a clock_id of - * CLOCK_REALTIME. - * - * Parameters: - * clockid - Specifies the clock to use as the timing base. - * evp - Refers to a user allocated sigevent structure that defines the - * asynchronous notification. evp may be NULL (see above). - * timerid - The pre-thread timer created by the call to timer_create(). - * - * Return Value: - * If the call succeeds, timer_create() will return 0 (OK) and update the - * location referenced by timerid to a timer_t, which can be passed to the - * other per-thread timer calls. If an error occurs, the function will return - * a value of -1 (ERROR) and set errno to indicate the error. - * - * EAGAIN - The system lacks sufficient signal queuing resources to honor the - * request. - * EAGAIN - The calling process has already created all of the timers it is - * allowed by this implementation. - * EINVAL - The specified clock ID is not defined. - * ENOTSUP - The implementation does not support the creation of a timer attached - * to the CPU-time clock that is specified by clock_id and associated with a - * thread different thread invoking timer_create(). - * - * Assumptions: - * - ********************************************************************************/ - -int timer_create(clockid_t clockid, FAR struct sigevent *evp, FAR timer_t *timerid) -{ - struct posix_timer_s *ret; - WDOG_ID wdog; - - /* Sanity checks. Also, we support only CLOCK_REALTIME */ - - if (!timerid || clockid != CLOCK_REALTIME) - { - errno = EINVAL; - return ERROR; - } - - /* Allocate a watchdog to provide the underling CLOCK_REALTIME timer */ - - wdog = wd_create(); - if (!wdog) - { - errno = EAGAIN; - return ERROR; - } - - /* Allocate a timer instance to contain the watchdog */ - - ret = timer_allocate(); - if (!ret) - { - errno = EAGAIN; - return ERROR; - } - - /* Initialize the timer instance */ - - ret->pt_crefs = 1; - ret->pt_owner = getpid(); - ret->pt_delay = 0; - ret->pt_wdog = wdog; - - if (evp) - { - ret->pt_signo = evp->sigev_signo; -#ifdef CONFIG_CAN_PASS_STRUCTS - ret->pt_value = evp->sigev_value; -#else - ret->pt_value.sival_ptr = evp->sigev_value.sival_ptr; -#endif - } - else - { - ret->pt_signo = SIGALRM; - ret->pt_value.sival_ptr = ret; - } - - /* Return the timer */ - - *timerid = ret; - return OK; -} - -#endif /* CONFIG_DISABLE_POSIX_TIMERS */ |