1998-09-21 Ben Elliston <bje@cygnus.com>

        * New directory.  Moved files from ../gcc/objc.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@22514 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 235 insertions, 0 deletions

diff --git a/libobjc/thr-irix.c b/libobjc/thr-irix.c
new file mode 100644
index 00000000000..528a3e3a434
--- /dev/null
+++ b/libobjc/thr-irix.c
@@ -0,0 +1,235 @@
+/* GNU Objective C Runtime Thread Interface - SGI IRIX Implementation
+   Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+   Contributed by Galen C. Hunt (gchunt@cs.rochester.edu)
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation; either version 2, or (at your option) any later version.
+
+GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+details.
+
+You should have received a copy of the GNU General Public License along with
+GNU CC; see the file COPYING.  If not, write to the Free Software
+Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, 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 <stdlib.h>
+#include <sys/types.h>
+#include <sys/sysmp.h>
+#include <sys/prctl.h>
+#include <ulocks.h>
+#include <objc/thr.h>
+#include "runtime.h"
+
+/* Key structure for maintaining thread specific storage */
+static void * __objc_shared_arena_handle = NULL;
+
+/* Backend initialization functions */
+
+/* Initialize the threads subsystem. */
+int
+__objc_init_thread_system(void)
+{
+  /* Name of IRIX arena. */
+  char arena_name[64];
+
+  DEBUG_PRINTF("__objc_init_thread_system\n");
+
+  /* Construct a temporary name for arena. */
+  sprintf(arena_name, "/usr/tmp/objc_%05u", (unsigned)getpid());
+
+  /* Up to 256 threads.  Arena only for threads. */
+  usconfig(CONF_INITUSERS, 256);
+  usconfig(CONF_ARENATYPE, US_SHAREDONLY);
+
+  /* Initialize the arena */
+  if (!(__objc_shared_arena_handle = usinit(arena_name)))
+    /* Failed */
+    return -1;
+
+  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)
+{
+  objc_thread_t thread_id;
+  int sys_id;
+
+  if ((sys_id = sproc((void *)func, PR_SALL, arg)) >= 0)
+    thread_id = (objc_thread_t)sys_id;
+  else
+    thread_id = NULL;
+  
+  return thread_id;
+}
+
+/* Set the current thread's priority. */
+int
+__objc_thread_set_priority(int priority)
+{
+  /* Not implemented yet */
+  return -1;
+}
+
+/* Return the current thread's priority. */
+int
+__objc_thread_get_priority(void)
+{
+  /* Not implemented yet */
+  return OBJC_THREAD_INTERACTIVE_PRIORITY;
+}
+
+/* Yield our process time to another thread. */
+void
+__objc_thread_yield(void)
+{
+  sginap(0);
+}
+
+/* Terminate the current thread. */
+int
+__objc_thread_exit(void)
+{
+  /* IRIX only has exit. */
+  exit(__objc_thread_exit_status);
+
+  /* Failed if we reached here */
+  return -1;
+}
+
+/* Returns an integer value which uniquely describes a thread. */
+objc_thread_t
+__objc_thread_id(void)
+{
+  /* Threads are processes. */
+  return (objc_thread_t)get_pid();
+}
+
+/* Sets the thread's local storage pointer. */
+int
+__objc_thread_set_data(void *value)
+{
+  *((void **)&PRDA->usr_prda) = value;
+  return 0;
+}
+
+/* Returns the thread's local storage pointer. */
+void *
+__objc_thread_get_data(void)
+{
+  return *((void **)&PRDA->usr_prda);
+}
+
+/* Backend mutex functions */
+
+/* Allocate a mutex. */
+int
+__objc_mutex_allocate(objc_mutex_t mutex)
+{
+  if (!( (ulock_t)(mutex->backend) = usnewlock(__objc_shared_arena_handle) ))
+    return -1;
+  else
+    return 0;
+}
+
+/* Deallocate a mutex. */
+int
+__objc_mutex_deallocate(objc_mutex_t mutex)
+{
+  usfreelock((ulock_t)(mutex->backend), __objc_shared_arena_handle);
+  return 0;
+}
+
+/* Grab a lock on a mutex. */
+int
+__objc_mutex_lock(objc_mutex_t mutex)
+{
+  if (ussetlock((ulock_t)(mutex->backend)) == 0)
+    return -1;
+  else
+    return 0;
+}
+
+/* Try to grab a lock on a mutex. */
+int
+__objc_mutex_trylock(objc_mutex_t mutex)
+{
+  if (ustestlock((ulock_t)(mutex->backend)) == 0)
+    return -1;
+  else
+    return 0;
+}
+
+/* Unlock the mutex */
+int
+__objc_mutex_unlock(objc_mutex_t mutex)
+{
+  usunsetlock((ulock_t)(mutex->backend));
+  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 */