/* GNU Objective C Runtime Thread Interface - OS/2 emx Implementation   Copyright (C) 1996, 1997 Free Software Foundation, Inc.   Contributed by Thomas Baier (baier@ci.tuwien.ac.at)This file is part of GCC.GCC is free software; you can redistribute it and/or modify it under theterms of the GNU General Public License as published by the Free SoftwareFoundation; either version 2, or (at your option) any later version.GCC is distributed in the hope that it will be useful, but WITHOUT ANYWARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESSFOR A PARTICULAR PURPOSE.  See the GNU General Public License for moredetails.You should have received a copy of the GNU General Public Licensealong with GCC; see the file COPYING.  If not, write tothe Free Software Foundation, 51 Franklin Street, Fifth Floor,Boston, MA 02110-1301, USA.  *//* As a special exception, if you link this library with files compiled with   GCC to produce an executable, this does not cause the resulting executable   to be covered by the GNU General Public License. This exception does not   however invalidate any other reasons why the executable file might be   covered by the GNU General Public License.  */#include "objc/thr.h"#include "objc/runtime.h"#define INCL_DOSSEMAPHORES#define INCL_DOSPROCESS/* * conflicts with objc.h:       SEL, BOOL, id * solution:  prefixing those with _OS2_ before including <os2.h> */#define SEL _OS2_SEL#define BOOL _OS2_BOOL#define id _OS2_id#include <os2.h>#undef id#undef SEL#undef BOOL#include <stdlib.h>/* Backend initialization functions *//* Initialize the threads subsystem. */int__objc_init_thread_system(void){  return 0;}/* Close the threads subsystem. */int__objc_close_thread_system(void){  return 0;}/* Backend thread functions *//* Create a new thread of execution. */objc_thread_t__objc_thread_detach(void (*func)(void *arg), void *arg){  int thread_id = 0;  if ((thread_id = _beginthread (func,NULL,32768,arg)) < 0)    thread_id = 0;    return (objc_thread_t)thread_id;}/* Set the current thread's priority. */int__objc_thread_set_priority(int priority){  ULONG sys_class = 0;  ULONG sys_priority = 0;  /* OBJC_THREAD_INTERACTIVE_PRIORITY -> PRTYC_FOREGROUNDSERVER   * OBJC_THREAD_BACKGROUND_PRIORITY  -> PRTYC_REGULAR   * OBJC_THREAD_LOW_PRIORITY         -> PRTYC_IDLETIME */    switch (priority) {  case OBJC_THREAD_INTERACTIVE_PRIORITY:    sys_class = PRTYC_REGULAR;    sys_priority = 10;    break;  default:  case OBJC_THREAD_BACKGROUND_PRIORITY:    sys_class = PRTYC_IDLETIME;    sys_priority = 25;    break;  case OBJC_THREAD_LOW_PRIORITY:    sys_class = PRTYC_IDLETIME;    sys_priority = 0;    break;  }  /* Change priority */  if (!DosSetPriority (PRTYS_THREAD,sys_class,sys_priority,*_threadid))    return 0;  else    return -1;}/* Return the current thread's priority. */int__objc_thread_get_priority(void){  PTIB ptib;  PPIB ppib;  /* get information about current thread */  DosGetInfoBlocks (&ptib,&ppib);  switch (ptib->tib_ptib2->tib2_ulpri)    {    case PRTYC_IDLETIME:    case PRTYC_REGULAR:    case PRTYC_TIMECRITICAL:    case PRTYC_FOREGROUNDSERVER:    default:      return OBJC_THREAD_INTERACTIVE_PRIORITY;    }  return -1;}/* Yield our process time to another thread. */void__objc_thread_yield(void){  DosSleep (0);}/* Terminate the current thread. */int__objc_thread_exit(void){  /* terminate the thread, NEVER use DosExit () */  _endthread ();  /* Failed if we reached here */  return -1;}/* Returns an integer value which uniquely describes a thread. */objc_thread_t__objc_thread_id(void){  return (objc_thread_t) *_threadid;}/* Sets the thread's local storage pointer. */int__objc_thread_set_data(void *value){  *_threadstore () = value;  return 0;}/* Returns the thread's local storage pointer. */void *__objc_thread_get_data(void){  return *_threadstore ();}/* Backend mutex functions *//* Allocate a mutex. */int__objc_mutex_allocate(objc_mutex_t mutex){  if (DosCreateMutexSem (NULL, (HMTX)(&(mutex->backend)),0L,0) > 0)    return -1;  else    return 0;}/* Deallocate a mutex. */int__objc_mutex_deallocate(objc_mutex_t mutex){  DosCloseMutexSem ((HMTX)(mutex->backend));  return 0;}/* Grab a lock on a mutex. */int__objc_mutex_lock(objc_mutex_t mutex){  if (DosRequestMutexSem ((HMTX)(mutex->backend),-1L) != 0)    return -1;  else    return 0;}/* Try to grab a lock on a mutex. */int__objc_mutex_trylock(objc_mutex_t mutex){  if (DosRequestMutexSem ((HMTX)(mutex->backend),0L) != 0)    return -1;  else    return 0;}/* Unlock the mutex */int__objc_mutex_unlock(objc_mutex_t mutex){  if (DosReleaseMutexSem((HMTX)(mutex->backend)) != 0)    return -1;  else    return 0;}/* Backend condition mutex functions *//* Allocate a condition. */int__objc_condition_allocate(objc_condition_t condition){  /* Unimplemented. */  return -1;}/* Deallocate a condition. */int__objc_condition_deallocate(objc_condition_t condition){  /* Unimplemented. */  return -1;}/* Wait on the condition */int__objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex){  /* Unimplemented. */  return -1;}/* Wake up all threads waiting on this condition. */int__objc_condition_broadcast(objc_condition_t condition){  /* Unimplemented. */  return -1;}/* Wake up one thread waiting on this condition. */int__objc_condition_signal(objc_condition_t condition){  /* Unimplemented. */  return -1;}/* End of File */