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Fix various OS-related comments

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Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen
2015-12-15 21:43:33 +01:00
parent bb0fc7a2c0
commit 00e9bf2bb3
12 changed files with 68 additions and 93 deletions
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13
winsup/cygwin/cygheap.h
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@@ -207,17 +207,16 @@ enum fcwd_version_t {
FCWD_W8
};
/* This class is used to store the CWD starting with Windows Vista.
The CWD storage in the RTL_USER_PROCESS_PARAMETERS block is only
an afterthought now. The actual CWD storage is a FAST_CWD structure
which is allocated on the process heap. The new method only requires
minimal locking and it's much more multi-thread friendly. Presumably
it minimizes contention when accessing the CWD.
/* This class is used to store the CWD. The CWD storage in the
RTL_USER_PROCESS_PARAMETERS block is only an afterthought now. The actual
CWD storage is a FAST_CWD structure which is allocated on the process heap.
The new method only requires minimal locking and it's much more multi-thread
friendly. Presumably it minimizes contention when accessing the CWD.
The class fcwd_access_t is supposed to encapsulate the gory implementation
details depending on OS version from the calling functions.
The layout of all structures has been tested on 32 and 64 bit. */
class fcwd_access_t {
/* This is the layout used in Windows 8. */
/* This is the layout used in Windows 8 and later. */
struct FAST_CWD_8 {
LONG ReferenceCount; /* Only release when this is 0. */
HANDLE DirectoryHandle;