This commit was manufactured by cvs2svn to create branch 'chise-r21-4-18'.

[chise/xemacs-chise.git-] / src / sheap.c

diff --git a/src/sheap.c b/src/sheap.c
new file mode 100644 (file)
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+++ b/src/sheap.c
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+/* Static Heap management routines for XEmacs.
+   Copyright (C) 1994, 1998 Free Software Foundation, Inc.
+
+This file is part of XEmacs.
+
+XEmacs 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.
+
+XEmacs 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 XEmacs; see the file COPYING.  If not, write to the Free
+Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.*/
+
+#include <config.h>
+#include "lisp.h"
+
+#include <unistd.h>
+#include <sheap-adjust.h>
+
+#define STATIC_HEAP_BASE       0x800000
+#define STATIC_HEAP_SLOP       0x40000
+#define STATIC_HEAP_SIZE \
+(STATIC_HEAP_BASE + SHEAP_ADJUSTMENT + STATIC_HEAP_SLOP)
+#define BLOCKSIZE      (1<<12)
+#define ALLOC_UNIT (BLOCKSIZE-1)
+#define ALLOC_MASK ~((unsigned long)(ALLOC_UNIT))
+#define ALIGN_ALLOC(addr) ((((unsigned long)addr) + ALLOC_UNIT) & ALLOC_MASK)
+
+char   static_heap_buffer[STATIC_HEAP_SIZE]={0};
+char*  static_heap_base=static_heap_buffer;
+char*  static_heap_ptr=static_heap_buffer;
+unsigned long  static_heap_size=STATIC_HEAP_SIZE;
+int    static_heap_initialized=0;
+int    static_heap_dumped=0;
+
+void* more_static_core ( ptrdiff_t increment );
+void* more_static_core ( ptrdiff_t increment )
+{
+  int size = (int) increment;
+  void *result;
+
+  if (!static_heap_initialized)
+    {
+#ifdef VALMASK
+      if (((unsigned long) static_heap_base & ~VALMASK) != 0)
+       {
+         printf ("error: The heap was allocated in upper memory.\n");
+         exit (-1);
+       }
+#endif
+      static_heap_base=(char*)ALIGN_ALLOC(static_heap_buffer);
+      static_heap_ptr=static_heap_base;
+      static_heap_size=STATIC_HEAP_SIZE -
+       (static_heap_base-static_heap_buffer);
+#ifdef CYGWIN
+      sbrk(BLOCKSIZE);         /* force space for fork to work */
+#endif
+      static_heap_initialized=1;
+    }
+
+  result = static_heap_ptr;
+
+  /* we don't need to align - handled by gmalloc.  */
+
+  if (size < 0)
+    {
+      if (static_heap_ptr + size < static_heap_base)
+       {
+         return 0;
+       }
+    }
+  else
+    {
+      if (static_heap_ptr + size >= static_heap_base + static_heap_size)
+       {
+         printf(
+"\nRequested %d bytes, static heap exhausted!  base is %p, current ptr\n"
+"is %p. You have exhausted the static heap. \n"
+"\n"
+"If you are simply trying to compile, remove sheap-adjust.h\n"
+"and recompile from the top level. If this doesn't\n"
+"work then STATIC_HEAP_SLOP (defined in this file) is too small.\n"
+"\n"
+"If you want to run temacs, change SHEAP_ADJUSTMENT in sheap-adjust.h\n"
+"to 0 or a +ve number. Generally you should *not* try to run temacs\n"
+"with a static heap, you should dump first.\n", size,
+static_heap_base, static_heap_ptr);
+
+         exit(-1);
+         return 0;
+       }
+    }
+  static_heap_ptr += size;
+
+  return result;
+}
+
+static void
+sheap_adjust_h ()
+{
+  FILE *stream = fopen ("sheap-adjust.h", "w");
+
+  if (stream == NULL)
+    report_file_error ("Opening sheap adjustment file",
+                      Fcons (build_string ("sheap-adjust.h"), Qnil));
+
+  fprintf (stream,
+          "/*\tDo not edit this file!\n"
+          "\tAutomatically generated by XEmacs */\n"
+          "# define SHEAP_ADJUSTMENT (%d)\n",
+          ((static_heap_ptr - static_heap_buffer) - STATIC_HEAP_BASE));
+  fclose (stream);
+}
+
+void report_sheap_usage (int die_if_pure_storage_exceeded);
+void
+report_sheap_usage (int die_if_pure_storage_exceeded)
+{
+  int rc = 0;
+
+  size_t lost = (STATIC_HEAP_BASE + STATIC_HEAP_SLOP + SHEAP_ADJUSTMENT)
+    - (static_heap_ptr - static_heap_buffer);
+  char buf[200];
+  sprintf (buf, "Static heap usage: %ld of %ld",
+               (long) (static_heap_ptr - static_heap_buffer),
+          (long) (STATIC_HEAP_BASE + STATIC_HEAP_SLOP + SHEAP_ADJUSTMENT));
+
+  if (lost > STATIC_HEAP_SLOP) {
+    sprintf (buf + strlen (buf), " -- %ldk wasted", (long)(lost/1024));
+    if (die_if_pure_storage_exceeded) {
+      sheap_adjust_h();
+      rc = -1;
+    }
+    message ("%s", buf);
+  }
+
+  if (rc < 0) {
+    unlink("SATISFIED");
+    fatal ("Static heap size adjusted, Don't Panic!  I will restart the `make'");
+  }
+}
+
+