(coded-charset-entity-reference-alist): Add setting for

[chise/xemacs-chise.git.1] / src / ntheap.c

diff --git a/src/ntheap.c b/src/ntheap.c
index ff5ef3a..0f31ff5 100644 (file)
--- a/src/ntheap.c
+++ b/src/ntheap.c
@@ -38,38 +38,10 @@ unsigned long syspage_mask = 0;
 int edata;
 int etext;
 
-/* The major and minor versions of NT.  */
-int nt_major_version;
-int nt_minor_version;
-
-/* Distinguish between Windows NT and Windows 95.  */
-int os_subtype;
-
 /* Cache information describing the NT system for later use.  */
 void
 cache_system_info (void)
 {
-  union 
-    {
-      struct info 
-       {
-         char  major;
-         char  minor;
-         short platform;
-       } info;
-      DWORD data;
-    } version;
-
-  /* Cache the version of the operating system.  */
-  version.data = GetVersion ();
-  nt_major_version = version.info.major;
-  nt_minor_version = version.info.minor;
-
-  if (version.info.platform & 0x8000)
-    os_subtype = OS_WIN95;
-  else
-    os_subtype = OS_NT;
-
   /* Cache page size, allocation unit, processor type, etc.  */
   GetSystemInfo (&sysinfo_cache);
   syspage_mask = sysinfo_cache.dwPageSize - 1;
@@ -108,7 +80,7 @@ get_data_end (void)
   return data_region_end;
 }
 
-static char *
+static unsigned char *
 allocate_heap (void)
 {
   /* The base address for our GNU malloc heap is chosen in conjunction
@@ -148,7 +120,8 @@ allocate_heap (void)
      still a pretty decent arena to play in!  */
 
   unsigned long base = 0x01B00000;   /*  27MB */
-  unsigned long end  = 1 << VALBITS; /* 256MB */
+  /* Temporary hack for the non-starting problem - use 28 (256Mb) rather than VALBITS (1Gb) */
+  unsigned long end  = 1 << 28;      /* 256MB */
   void *ptr = NULL;
 
 #define NTHEAP_PROBE_BASE 1
@@ -171,7 +144,7 @@ allocate_heap (void)
                      PAGE_NOACCESS);
 #endif
 
-  return ptr;
+  return (unsigned char*) ptr;
 }
 
 
@@ -247,24 +220,51 @@ sbrk (unsigned long increment)
   return result;
 }
 
-#if !defined (CANNOT_DUMP) && !defined(HEAP_IN_DATA)
+#if !defined (CANNOT_DUMP) && !defined(HEAP_IN_DATA) && !defined(PDUMP)
 
 /* Recreate the heap from the data that was dumped to the executable.
    EXECUTABLE_PATH tells us where to find the executable.  */
 void
 recreate_heap (char *executable_path)
 {
-  unsigned char *tmp;
-
   /* First reserve the upper part of our heap.  (We reserve first
-     because there have been problems in the past where doing the
-     mapping first has loaded DLLs into the VA space of our heap.)  */
-  tmp = VirtualAlloc ((void *) get_heap_end (),
-                     get_reserved_heap_size () - get_committed_heap_size (),
-                     MEM_RESERVE,
-                     PAGE_NOACCESS);
+        because there have been problems in the past where doing the
+        mapping first has loaded DLLs into the VA space of our heap.)  */
+
+  /* Query the region at the end of the committed heap */
+  void *tmp;
+  MEMORY_BASIC_INFORMATION info;
+  DWORD size;
+  unsigned char* base = get_heap_end ();
+  unsigned char* end  = base + get_reserved_heap_size () - get_committed_heap_size ();
+  VirtualQuery (base, &info, sizeof info);
+  if (info.State != MEM_FREE)
+       {
+         /* Oops, something has already reserved or commited it, nothing we can do but exit */
+         char buf[256];
+         wsprintf(buf,
+                          "XEmacs cannot start because the memory region required by the heap is not available.\n"
+                          "(BaseAddress = 0x%lx, AllocationBase = 0x%lx, Size = 0x%lx, State = %s, Type = %s)",
+                          info.BaseAddress, info.AllocationBase, info.RegionSize,
+                          info.State == MEM_COMMIT ? "COMMITED" : "RESERVED",
+                          info.Type == MEM_IMAGE ? "IMAGE" : info.Type == MEM_MAPPED ? "MAPPED" : "PRIVATE");
+         MessageBox(NULL, buf, "XEmacs", MB_OK | MB_ICONSTOP);
+         exit(1);
+       }
+
+  /* Now try and reserve as much as possible */
+  size = min (info.RegionSize, end - base);
+  tmp = VirtualAlloc (base, size, MEM_RESERVE, PAGE_NOACCESS);
   if (!tmp)
-    exit (1);
+       {
+         /* Can't reserve it, nothing we can do but exit */
+         char buf[256];
+         wsprintf(buf,
+                          "XEmacs cannot start because it couldn't reserve space required for the heap.\n"
+                          "(VirtualAlloc at 0x%lx of 0x%lx failed (%d))", base, size, GetLastError());
+         MessageBox(NULL, buf, "XEmacs", MB_OK | MB_ICONSTOP);
+         exit (1);
+       }
 
   /* We read in the data for the .bss section from the executable
      first and map in the heap from the executable second to prevent
@@ -291,13 +291,15 @@ round_heap (unsigned long align)
     sbrk (need_to_alloc);
 }
 
-#if (_MSC_VER >= 1000)
+#if ((_MSC_VER >= 1000) && (_MSC_VER < 1300))
 
 /* MSVC 4.2 invokes these functions from mainCRTStartup to initialize
    a heap via HeapCreate.  They are normally defined by the runtime,
    but we override them here so that the unnecessary HeapCreate call
    is not performed.  */
 
+/* MSVC 7.0 does not allow you to redefine _heap_init or _heap_term. */
+
 int __cdecl
 _heap_init (void)
 {