Cygwin support patch.

[bpt/emacs.git] / src / mem-limits.h

diff --git a/src/mem-limits.h b/src/mem-limits.h
index 06c8e1f..3ba8f3c 100644 (file)
--- a/src/mem-limits.h
+++ b/src/mem-limits.h
@@ -1,11 +1,11 @@
 /* Includes for memory limit warnings.
-   Copyright (C) 1990, 1992 Free Software Foundation, Inc.
+   Copyright (C) 1990, 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
 GNU Emacs 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 1, or (at your option)
+the Free Software Foundation; either version 2, or (at your option)
 any later version.
 
 GNU Emacs is distributed in the hope that it will be useful,
@@ -15,11 +15,48 @@ GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with GNU Emacs; see the file COPYING.  If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#ifdef MSDOS
+#include <dpmi.h>
+extern int etext;
+#endif
+
+/* Some systems need this before <sys/resource.h>.  */
+#include <sys/types.h>
+
+#ifdef _LIBC
+
+#include <sys/resource.h>
+#define BSD4_2                 /* Tell code below to use getrlimit.  */
+
+/* Old Linux startup code won't define __data_start.  */
+extern int etext, __data_start; weak_extern (__data_start)
+#define start_of_data()        (&__data_start ?: &etext)
+
+#else /* not _LIBC */
+
+#if defined (__osf__) && (defined (__mips) || defined (mips) || defined(__alpha))
+#include <sys/time.h>
+#include <sys/resource.h>
+#endif
+
+#ifdef __bsdi__
+#define BSD4_2
+#endif
+
+#ifdef CYGWIN
+#define BSD4_2
+#endif
 
 #ifndef BSD4_2
 #ifndef USG
+#ifndef MSDOS
+#ifndef WINDOWSNT
 #include <sys/vlimit.h>
+#endif /* not WINDOWSNT */
+#endif /* not MSDOS */
 #endif /* not USG */
 #else /* if BSD4_2 */
 #include <sys/time.h>
@@ -30,11 +67,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 /* The important properties of this type are that 1) it's a pointer, and
    2) arithmetic on it should work as if the size of the object pointed
    to has a size of 1.  */
-#ifdef __STDC__
-typedef void *POINTER;
-#else
-typedef char *POINTER;
-#endif
+typedef POINTER_TYPE *POINTER;
 
 typedef unsigned long SIZE;
 
@@ -46,30 +79,45 @@ typedef unsigned long SIZE;
 extern POINTER start_of_data ();
 #ifdef DATA_SEG_BITS
 #define EXCEEDS_LISP_PTR(ptr) \
-  (((unsigned int) (ptr) & ~DATA_SEG_BITS) >> VALBITS)
+  (((EMACS_UINT) (ptr) & ~DATA_SEG_BITS) >> VALBITS)
 #else
-#define EXCEEDS_LISP_PTR(ptr) ((unsigned int) (ptr) >> VALBITS)
+#define EXCEEDS_LISP_PTR(ptr) ((EMACS_UINT) (ptr) >> VALBITS)
 #endif
 
-#ifdef BSD
+#ifdef DATA_START
+#define start_of_data() ((char *)DATA_START)
+#endif
+
+#ifdef BSD_SYSTEM
 #ifndef DATA_SEG_BITS
+#ifndef DATA_START
 extern char etext;
 #define start_of_data() &etext
 #endif
 #endif
+#endif
 
-#else  /* Not emacs */ 
+#else  /* not emacs */
 extern char etext;
 #define start_of_data() &etext
-#endif /* Not emacs */
+#endif /* not emacs */
+
+#endif /* not _LIBC */
 
-  
 
 /* start of data space; can be changed by calling malloc_init */
 static POINTER data_space_start;
 
 /* Number of bytes of writable memory we can expect to be able to get */
-static unsigned int lim_data;
+static unsigned long lim_data;
+
+#ifdef NO_LIM_DATA
+static void
+get_lim_data ()
+{
+  lim_data = -1;
+}
+#else /* not NO_LIM_DATA */
 
 #ifdef USG
 
@@ -77,24 +125,52 @@ static void
 get_lim_data ()
 {
   extern long ulimit ();
-    
-#ifdef ULIMIT_BREAK_VALUE
-  lim_data = ULIMIT_BREAK_VALUE;
-#else
+
+  lim_data = -1;
+
+  /* Use the ulimit call, if we seem to have it.  */
+#if !defined (ULIMIT_BREAK_VALUE) || defined (GNU_LINUX)
   lim_data = ulimit (3, 0);
 #endif
 
+  /* If that didn't work, just use the macro's value.  */
+#ifdef ULIMIT_BREAK_VALUE
+  if (lim_data == -1)
+    lim_data = ULIMIT_BREAK_VALUE;
+#endif
+
   lim_data -= (long) data_space_start;
 }
 
 #else /* not USG */
-#ifndef BSD4_2
+#ifdef WINDOWSNT
 
+static void
+get_lim_data ()
+{
+  extern unsigned long reserved_heap_size;
+  lim_data = reserved_heap_size;
+}
+
+#else
+#if !defined (BSD4_2) && !defined (__osf__)
+
+#ifdef MSDOS
+void
+get_lim_data ()
+{
+  _go32_dpmi_meminfo info;
+
+  _go32_dpmi_get_free_memory_information (&info);
+  lim_data = info.available_memory;
+}
+#else /* not MSDOS */
 static void
 get_lim_data ()
 {
   lim_data = vlimit (LIM_DATA, -1);
 }
+#endif /* not MSDOS */
 
 #else /* BSD4_2 */
 
@@ -111,4 +187,6 @@ get_lim_data ()
 #endif
 }
 #endif /* BSD4_2 */
+#endif /* not WINDOWSNT */
 #endif /* not USG */
+#endif /* not NO_LIM_DATA */