sem.c

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/*-
 * Copyright (c) 2002-2018 The UbixOS Project.
 * All rights reserved.
 *
 * This was developed by Christopher W. Olsen for the UbixOS Project.
 *
 * 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, the following disclaimer and the list of authors.
 * 2) Redistributions in binary form must reproduce the above copyright notice, this list of
 *    conditions, the following disclaimer and the list of authors in the documentation and/or
 *    other materials provided with the distribution.
 * 3) Neither the name of the UbixOS Project 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 AUTHOR 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.
 */
 
#include <ubixos/sem.h>
#include <sys/types.h>
#include <ubixos/errno.h>
#include <ubixos/time.h>
#include <ubixos/kpanic.h>
#include <lib/kmalloc.h>
 
int sem_close(semID_t id) {
  return(0);
}
 
int sem_post(semID_t id) {
  return(0);
}
 
int sem_wait(semID_t id) {
  return(0);
}
 
int sem_trywait(semID_t id) {
  return(0);
}
 
int sem_timedwait(semID_t id, const struct timespec *ts) {
  return(0);
}
 
err_t sem_init(sys_sem_t **sem, uint8_t count) {
  sys_sem_t *newSem = 0x0;
 
  if (*sem != 0) {
    //kpanic("UH OH!");
    kprintf("UH OH!");
  }
 
  newSem = kmalloc(sizeof(struct sys_sem));
  newSem->signaled = count;
 
  ubthread_cond_init(&(newSem->cond), NULL);
  ubthread_mutex_init(&(newSem->mutex), NULL);
 
  *sem = newSem;
 
  return (ENOERR);
}
 
int sem_open(semID_t *id, const char *name, int oflag, mode_t mode, unsigned int value) {
  return(0);
}
 
int sem_unlink(const char *name) {
  return(0);
}
 
int sem_getvalue(semID_t id, int *val) {
  return(0);
}
 
err_t sem_destroy(sys_sem_t **sem) {
  if (*sem == NULL)
    return (EINVAL);
 
  sys_sem_t *d_sem = *sem;
 
  ubthread_cond_destroy(&(d_sem->cond));
  ubthread_mutex_destroy(&(d_sem->mutex));
 
  kfree(sem);
  *sem = 0x0;
 
  return (ENOERR);
}