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MmapPool: Add invariant 

Add invariant to ensure blocks are linked correctly since this error
appeared several times.
This commit is contained in:
Eugen Wissner 2017-01-14 21:48:21 +01:00
parent f5fe7bec4a
commit 48205b2fc9
1 changed files with 16 additions and 1 deletions
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17
source/tanya/memory/mmappool.d
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@ -3,7 +3,7 @@
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/**
* Copyright: Eugene Wissner 2016.
* Copyright: Eugene Wissner 2016-2017.
* License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
* Mozilla Public License, v. 2.0).
* Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
@ -50,6 +50,21 @@ else version (Windows)
*/
final class MmapPool : Allocator
{
invariant
{
for (auto r = &head; *r !is null; r = &((*r).next))
{
auto block = cast(Block) (cast(void*) *r + RegionEntry.sizeof);
do
{
assert(block.prev is null || block.prev.next is block);
assert(block.next is null || block.next.prev is block);
assert(block.region is *r);
}
while ((block = block.next) !is null);
}
}
/**
* Allocates $(D_PARAM size) bytes of memory.
*