From 709fd16b8e32703a9540c51cdd089e368a18c22a Mon Sep 17 00:00:00 2001 From: Geoff Voelker Date: Sat, 11 May 1996 06:38:25 +0000 Subject: [PATCH] =?utf8?q?(allocate=5Fheap):=20Bump=20heap=20base=20up=20t?= =?utf8?q?o=2027MB=20to=20=05=1Bwsatisfy=20Win95.?= MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit --- src/w32heap.c | 31 +++++++++++++++++++++---------- 1 file changed, 21 insertions(+), 10 deletions(-) diff --git a/src/w32heap.c b/src/w32heap.c index 28d44e54b21..776f857f3a5 100644 --- a/src/w32heap.c +++ b/src/w32heap.c @@ -131,20 +131,31 @@ allocate_heap (void) size could be roughly double, so if we allow 4MB for the executable we will have plenty of room for expansion. - Thus we set the malloc heap base to 20MB. Since Emacs now leaves + Thus we would like to set the malloc heap base to 20MB. However, + Win95 refuses to allocate the heap starting at this address, so we + set the base to 27MB to make it happy. Since Emacs now leaves 28 bits available for pointers, this lets us use the remainder of - the region below the 256MB line for our malloc arena - 236MB is - still a pretty decent arena to play in! */ + the region below the 256MB line for our malloc arena - 229MB is + still a pretty decent arena to play in! */ - unsigned long base = 0x01400000; /* 20MB */ + unsigned long base = 0x01B00000; /* 27MB */ unsigned long end = 1 << VALBITS; /* 256MB */ + void *ptr = NULL; - reserved_heap_size = end - base; - - return VirtualAlloc ((void *) base, - get_reserved_heap_size (), - MEM_RESERVE, - PAGE_NOACCESS); +#ifdef NTHEAP_PROBE_BASE + while (!ptr && (base < end)) + { +#endif + reserved_heap_size = end - base; + ptr = VirtualAlloc ((void *) base, + get_reserved_heap_size (), + MEM_RESERVE, + PAGE_NOACCESS); +#ifdef NTHEAP_PROBE_BASE + base += 0x00100000; /* 1MB increment */ + } +#endif + return ptr; } -- 2.39.5