ubthread.c

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/*****************************************************************************************
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 All rights reserved.

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 $Id: ubthread_8c-source.html 88 2016-01-12 00:11:29Z reddawg $

*****************************************************************************************/

/* All these must be converted to be done atomically */

#include <ubixos/ubthread.h>
#include <ubixos/exec.h>
#include <ubixos/sched.h>
#include <ubixos/time.h>
#include <ubixos/spinlock.h>
#include <ubixos/vitals.h>
#include <lib/kmalloc.h>
#include <lib/kprintf.h>

struct ubthread_cond_list *conds = 0x0;
struct ubthread_mutex_list *mutex = 0x0;

kTask_t *ubthread_self() {
  return(_current);
  }

int ubthread_cond_init(ubthread_cond_t *cond,const uInt32 attr) { 
  ubthread_cond_t  ubcond = kmalloc(sizeof(struct ubthread_cond));
  ubcond->id     = (int)cond;
  ubcond->locked = UNLOCKED;
  *cond = ubcond;
  return(0x0);
  }

int ubthread_mutex_init(ubthread_mutex_t *mutex,const uInt32 attr) { 
  ubthread_mutex_t ubmutex = kmalloc(sizeof(struct ubthread_mutex));
  ubmutex->id     = (int)mutex;
  ubmutex->locked = UNLOCKED;
  *mutex = ubmutex;
  return(0x0);
  }

int ubthread_cond_destroy(ubthread_cond_t *cond) {
  kfree(*cond);
  *cond = 0x0;
  return(0x0);
  }

int ubthread_mutex_destroy(ubthread_mutex_t *mutex) {
  kfree(*mutex);
  *mutex = 0x0;
  return(0x0);
  }

int ubthread_create(kTask_t **thread,const uInt32 *attr,void (* tproc)(void), void *arg) {
  *thread = (void *)execThread(tproc,(int)(kmalloc(0x2000)+0x2000),arg);
  return(0x0);
  }

int ubthread_mutex_lock(ubthread_mutex_t *mutex) {
  ubthread_mutex_t ubmutex = *mutex;
  if (ubmutex->locked == LOCKED) {
    kprintf("Mutex Already Lock By %x Trying To Be Relocked By %x\n",ubmutex->pid,_current->id);
    while (ubmutex->locked == LOCKED);
    }
  ubmutex->locked = LOCKED;
  ubmutex->pid    = _current->id;
  return(0x0);
  }

int ubthread_mutex_unlock(ubthread_mutex_t *mutex) {
  ubthread_mutex_t ubmutex = *mutex;
 if (ubmutex->pid == _current->id) {
    ubmutex->locked = UNLOCKED;
    return(0x0);
    }
  else {
    //kprintf("Trying To Unlock Mutex From No Locking Thread\n");
    ubmutex->locked = UNLOCKED;
    return(-1);
    }
  }

int ubthread_cond_timedwait(ubthread_cond_t *cond, ubthread_mutex_t *mutex, const struct timespec *abstime) {
  ubthread_cond_t  ubcond  = *cond;
  ubthread_mutex_t ubmutex = *mutex;
  uInt32 enterTime = systemVitals->sysUptime+20;
  while (enterTime > systemVitals->sysUptime) {
    if (ubcond->locked == UNLOCKED) break;
    sched_yield();
    }
  ubmutex->locked = UNLOCKED;
  return(0x0);
  }

int ubthread_cond_wait(ubthread_cond_t *cond, ubthread_mutex_t *mutex) {
  ubthread_cond_t  ubcond  = *cond;
  ubthread_mutex_t ubmutex = *mutex;
  while (ubcond->locked == LOCKED) sched_yield();
  ubmutex->locked = UNLOCKED;
  return(0x0);
  }

int ubthread_cond_signal(ubthread_cond_t *cond) {
  ubthread_cond_t ubcond = *cond;
  ubcond->locked = UNLOCKED;
  return(0x0);
  }

/***
 END
 ***/

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