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-rw-r--r--nuttx/sched/pthread_condtimedwait.c308
1 files changed, 0 insertions, 308 deletions
diff --git a/nuttx/sched/pthread_condtimedwait.c b/nuttx/sched/pthread_condtimedwait.c
deleted file mode 100644
index 25f86d813..000000000
--- a/nuttx/sched/pthread_condtimedwait.c
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@@ -1,308 +0,0 @@
-/****************************************************************************
- * sched/pthread_condtimedwait.c
- *
- * Copyright (C) 2007-2009 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 <nuttx/compiler.h>
-
-#include <stdint.h>
-#include <unistd.h>
-#include <pthread.h>
-#include <signal.h>
-#include <time.h>
-#include <errno.h>
-#include <wdog.h>
-#include <debug.h>
-
-#include "os_internal.h"
-#include "pthread_internal.h"
-#include "clock_internal.h"
-
-/****************************************************************************
- * Definitions
- ****************************************************************************/
-
-/****************************************************************************
- * Private Type Declarations
- ****************************************************************************/
-
-/****************************************************************************
- * Global Variables
- ****************************************************************************/
-
-/****************************************************************************
- * Private Variables
- ****************************************************************************/
-
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: pthread_condtimedout
- *
- * Description:
- * This function is called if the timeout elapses before
- * the condition is signaled.
- *
- * Parameters:
- * argc - the number of arguments (should be 2)
- * pid - the task ID of the task to wakeup
- * signo - The signal to use to wake up the task
- *
- * Return Value:
- * None
- *
- * Assumptions:
- *
- ****************************************************************************/
-
-static void pthread_condtimedout(int argc, uint32_t pid, uint32_t signo)
-{
-#ifdef CONFIG_CAN_PASS_STRUCTS
- union sigval value;
-
- /* Send the specified signal to the specified task. */
-
- value.sival_ptr = NULL;
- (void)sigqueue((int)pid, (int)signo, value);
-#else
- (void)sigqueue((int)pid, (int)signo, NULL);
-#endif
-}
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: pthread_cond_timedwait
- *
- * Description:
- * A thread can perform a timed wait on a condition variable.
- *
- * Parameters:
- * cond - the condition variable to wait on
- * mutex - the mutex that protects the condition variable
- * abstime - wait until this absolute time
- *
- * Return Value:
- * OK (0) on success; ERROR (-1) on failure with errno
- * set appropriately.
- *
- * Assumptions:
- * Timing is of resolution 1 msec, with +/-1 millisecond
- * accuracy.
- *
- ****************************************************************************/
-
-int pthread_cond_timedwait(FAR pthread_cond_t *cond, FAR pthread_mutex_t *mutex,
- FAR const struct timespec *abstime)
-{
- WDOG_ID wdog;
- int ticks;
- int mypid = (int)getpid();
- irqstate_t int_state;
- int ret = OK;
- int status;
-
- sdbg("cond=0x%p mutex=0x%p abstime=0x%p\n", cond, mutex, abstime);
-
- /* Make sure that non-NULL references were provided. */
-
- if (!cond || !mutex)
- {
- ret = EINVAL;
- }
-
- /* Make sure that the caller holds the mutex */
-
- else if (mutex->pid != mypid)
- {
- ret = EPERM;
- }
-
- /* If no wait time is provided, this function degenerates to
- * the same behavior as pthread_cond_wait().
- */
-
- else if (!abstime)
- {
- ret = pthread_cond_wait(cond, mutex);
- }
-
- else
- {
- /* Create a watchdog */
-
- wdog = wd_create();
- if (!wdog)
- {
- ret = EINVAL;
- }
- else
- {
- sdbg("Give up mutex...\n");
-
- /* We must disable pre-emption and interrupts here so that
- * the time stays valid until the wait begins. This adds
- * complexity because we assure that interrupts and
- * pre-emption are re-enabled correctly.
- */
-
- sched_lock();
- int_state = irqsave();
-
- /* Convert the timespec to clock ticks. We must disable pre-emption
- * here so that this time stays valid until the wait begins.
- */
-
- ret = clock_abstime2ticks(CLOCK_REALTIME, abstime, &ticks);
- if (ret)
- {
- /* Restore interrupts (pre-emption will be enabled when
- * we fall through the if/then/else
- */
-
- irqrestore(int_state);
- }
- else
- {
- /* Check the absolute time to wait. If it is now or in the past, then
- * just return with the timedout condition.
- */
-
- if (ticks <= 0)
- {
- /* Restore interrupts and indicate that we have already timed out.
- * (pre-emption will be enabled when we fall through the
- * if/then/else
- */
-
- irqrestore(int_state);
- ret = ETIMEDOUT;
- }
- else
- {
- /* Give up the mutex */
-
- mutex->pid = 0;
- ret = pthread_givesemaphore((sem_t*)&mutex->sem);
- if (ret)
- {
- /* Restore interrupts (pre-emption will be enabled when
- * we fall through the if/then/else)
- */
-
- irqrestore(int_state);
- }
- else
- {
- /* Start the watchdog */
-
- wd_start(wdog, ticks, (wdentry_t)pthread_condtimedout,
- 2, (uint32_t)mypid, (uint32_t)SIGCONDTIMEDOUT);
-
- /* Take the condition semaphore. Do not restore interrupts
- * until we return from the wait. This is necessary to
- * make sure that the watchdog timer and the condition wait
- * are started atomically.
- */
-
- status = sem_wait((sem_t*)&cond->sem);
-
- /* Did we get the condition semaphore. */
-
- if (status != OK)
- {
- /* NO.. Handle the special case where the semaphore wait was
- * awakened by the receipt of a signal -- presumably the
- * signal posted by pthread_condtimedout().
- */
-
- if (get_errno() == EINTR)
- {
- sdbg("Timedout!\n");
- ret = ETIMEDOUT;
- }
- else
- {
- ret = EINVAL;
- }
- }
-
- /* The interrupts stay disabled until after we sample the errno.
- * This is because when debug is enabled and the console is used
- * for debug output, then the errno can be altered by interrupt
- * handling! (bad)
- */
-
- irqrestore(int_state);
- }
-
- /* Reacquire the mutex (retaining the ret). */
-
- sdbg("Re-locking...\n");
- status = pthread_takesemaphore((sem_t*)&mutex->sem);
- if (!status)
- {
- mutex->pid = mypid;
- }
- else if (!ret)
- {
- ret = status;
- }
- }
-
- /* Re-enable pre-emption (It is expected that interrupts
- * have already been re-enabled in the above logic)
- */
-
- sched_unlock();
- }
-
- /* We no longer need the watchdog */
-
- wd_delete(wdog);
- }
- }
-
- sdbg("Returning %d\n", ret);
- return ret;
-}
-
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