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std.heap.page_allocator: Windows support for growing without remapping

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This commit is contained in:
Andrew Kelley 2020-08-08 13:04:30 -07:00
parent cb9405cdbd
commit a2f8c23a96
1 changed files with 3 additions and 3 deletions
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6
lib/std/heap.zig
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@ -225,7 +225,7 @@ const PageAllocator = struct {
w.VirtualFree(buf_unaligned.ptr, 0, w.MEM_RELEASE);
return 0;
}
if (new_size < buf_unaligned.len) {
if (new_size <= buf_unaligned.len) {
const base_addr = @ptrToInt(buf_unaligned.ptr);
const old_addr_end = base_addr + buf_unaligned.len;
const new_addr_end = mem.alignForward(base_addr + new_size, mem.page_size);
@ -240,10 +240,10 @@ const PageAllocator = struct {
}
return alignPageAllocLen(new_size_aligned, new_size, len_align);
}
if (new_size == buf_unaligned.len) {
const old_size_aligned = mem.alignForward(buf_unaligned.len, mem.page_size);
if (new_size_aligned <= old_size_aligned) {
return alignPageAllocLen(new_size_aligned, new_size, len_align);
}
// new_size > buf_unaligned.len not implemented
return error.OutOfMemory;
}