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, 180 insertions, 0 deletions

diff --git a/libobjc/misc.c b/libobjc/misc.c
new file mode 100644
index 00000000000..7339888dc28
--- /dev/null
+++ b/libobjc/misc.c
@@ -0,0 +1,180 @@
+/* GNU Objective C Runtime Miscellaneous 
+   Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
+   Contributed by Kresten Krab Thorup
+
+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.  */
+
+#define __USE_FIXED_PROTOTYPES__
+#include <stdlib.h>
+#include "runtime.h"
+
+/*
+** Error handler function
+** NULL so that default is to just print to stderr
+*/
+static objc_error_handler _objc_error_handler = NULL;
+
+/* Trigger an objc error */
+void
+objc_error(id object, int code, const char* fmt, ...)
+{
+  va_list ap;
+
+  va_start(ap, fmt);
+  objc_verror(object, code, fmt, ap);
+  va_end(ap);
+}
+
+/* Trigger an objc error */
+void
+objc_verror(id object, int code, const char* fmt, va_list ap)
+{
+  BOOL result = NO;
+
+  /* Call the error handler if its there
+     Otherwise print to stderr */
+  if (_objc_error_handler)
+    result = (*_objc_error_handler)(object, code, fmt, ap);
+  else
+    vfprintf (stderr, fmt, ap);
+
+  /* Continue if the error handler says its ok
+     Otherwise abort the program */
+  if (result)
+    return;
+  else
+    abort();
+}
+
+/* Set the error handler */
+objc_error_handler
+objc_set_error_handler(objc_error_handler func)
+{
+  objc_error_handler temp = _objc_error_handler;
+  _objc_error_handler = func;
+  return temp;
+}
+
+/*
+** Standard functions for memory allocation and disposal.
+** Users should use these functions in their ObjC programs so
+** that they work properly with garbage collectors as well as
+** can take advantage of the exception/error handling available.
+*/
+
+void *
+objc_malloc(size_t size)
+{
+  void* res = (void*) (*_objc_malloc)(size);
+  if(!res)
+    objc_error(nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n");
+  return res;
+}
+
+void *
+objc_atomic_malloc(size_t size)
+{
+  void* res = (void*) (*_objc_atomic_malloc)(size);
+  if(!res)
+    objc_error(nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n");
+  return res;
+}
+
+void *
+objc_valloc(size_t size)
+{
+  void* res = (void*) (*_objc_valloc)(size);
+  if(!res)
+    objc_error(nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n");
+  return res;
+}
+
+void *
+objc_realloc(void *mem, size_t size)
+{
+  void* res = (void*) (*_objc_realloc)(mem, size);
+  if(!res)
+    objc_error(nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n");
+  return res;
+}
+
+void *
+objc_calloc(size_t nelem, size_t size)
+{
+  void* res = (void*) (*_objc_calloc)(nelem, size);
+  if(!res)
+    objc_error(nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n");
+  return res;
+}
+
+void
+objc_free(void *mem)
+{
+  (*_objc_free)(mem);
+}
+
+/*
+** Hook functions for memory allocation and disposal.
+** This makes it easy to substitute garbage collection systems
+** such as Boehm's GC by assigning these function pointers
+** to the GC's allocation routines.  By default these point
+** to the ANSI standard malloc, realloc, free, etc.
+**
+** Users should call the normal objc routines above for
+** memory allocation and disposal within their programs.
+*/
+
+#if OBJC_WITH_GC
+#include <gc.h>
+
+static void *GC_calloc (size_t nelem, size_t size)
+{
+  void* p = GC_malloc (nelem * size);
+  if (!p)
+    objc_error (nil, OBJC_ERR_MEMORY, "Virtual memory exhausted!\n");
+
+  memset (p, 0, nelem * size);
+  return p;
+}
+
+static void noFree (void* p) {}
+
+void *(*_objc_malloc)(size_t) = GC_malloc;
+void *(*_objc_atomic_malloc)(size_t) = GC_malloc_atomic;
+void *(*_objc_valloc)(size_t) = GC_malloc;
+void *(*_objc_realloc)(void *, size_t) = GC_realloc;
+void *(*_objc_calloc)(size_t, size_t) = GC_calloc;
+void (*_objc_free)(void *) = noFree;
+
+#else
+
+void *(*_objc_malloc)(size_t) = malloc;
+void *(*_objc_atomic_malloc)(size_t) = malloc;
+void *(*_objc_valloc)(size_t) = malloc;
+void *(*_objc_realloc)(void *, size_t) = realloc;
+void *(*_objc_calloc)(size_t, size_t) = calloc;
+void (*_objc_free)(void *) = free;
+
+
+#endif