Qi Wang 9a86c65abc Implement retain on Windows. ... The VirtualAlloc and VirtualFree APIs are different because MEM_DECOMMIT cannot be used across multiple VirtualAlloc regions. To properly support decommit, only allow merge / split within the same region -- this is done by tracking the "is_head" state of extents and not merging cross-region. Add a new state is_head (only relevant for retain && !maps_coalesce), which is true for the first extent in each VirtualAlloc region. Determine if two extents can be merged based on the head state, and use serial numbers for sanity checks.		2019-07-23 22:18:55 -07:00
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jemalloc	Implement retain on Windows.	2019-07-23 22:18:55 -07:00
msvc_compat	Replace tabs following #define with spaces.	2017-01-20 21:45:53 -08:00