diff options
Diffstat (limited to 'lib/system/alloc.nim')
| -rwxr-xr-x | lib/system/alloc.nim | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/lib/system/alloc.nim b/lib/system/alloc.nim index d6093c5b1..bcc70b853 100755 --- a/lib/system/alloc.nim +++ b/lib/system/alloc.nim @@ -17,8 +17,9 @@ # some platforms have really weird unmap behaviour: unmap(blockStart, PageSize) # really frees the whole block. Happens for Linux/PowerPC for example. Amd64 -# and x86 are safe though: -const weirdUnmap = not (defined(amd64) or defined(i386)) +# and x86 are safe though; Windows is special because MEM_RELEASE can only be +# used with a size of 0: +const weirdUnmap = not (defined(amd64) or defined(i386)) or defined(windows) when defined(posix): const @@ -75,7 +76,10 @@ elif defined(windows): # This means that the OS has some different view over how big the block is # that we want to free! So, we cannot reliably release the memory back to # Windows :-(. We have to live with MEM_DECOMMIT instead. - when reallyOsDealloc: VirtualFree(p, size, MEM_DECOMMIT) + # Well that used to be the case but MEM_DECOMMIT fragments the address + # space heavily, so we now treat Windows as a strange unmap target. + when reallyOsDealloc: VirtualFree(p, 0, MEM_RELEASE) + #VirtualFree(p, size, MEM_DECOMMIT) else: {.error: "Port memory manager to your platform".} |