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| author | Yaakov Selkowitz <yselkowi@redhat.com> | 2016-03-28 12:48:20 -0500 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2016-03-29 12:14:18 +0200 |
| commit | 660f84b15babdada62703f47e43f6dba8b4aebe9 (patch) | |
| tree | ecbdae58cef66ff78e20bee106c06c03d31bce01 /winsup/cygwin/shm.cc | |
| parent | ecf453f9635fb278cff4d4bae21a1e249313b817 (diff) | |
| download | cygnal-660f84b15babdada62703f47e43f6dba8b4aebe9.tar.gz cygnal-660f84b15babdada62703f47e43f6dba8b4aebe9.tar.bz2 cygnal-660f84b15babdada62703f47e43f6dba8b4aebe9.zip | |
cygwin: export __getpagesize
The inclusion of <sys/cygwin.h> by <sys/shm.h>, besides causing namespace
pollution, also makes it very difficult to get the WINVER-dependent parts
of the former. This affects code (such as x11vnc -unixpw_nis) which use
both SysV shared memory (e.g. the X11 MIT-SHM extension) and user password
authentication.
getpagesize is the simplest function to retreive this information, but it
is a legacy function and would also pollute the global namespace. The LSB
lists another form which is in the implementation-reserved namespace:
http://refspecs.linuxfoundation.org/LSB_3.1.0/LSB-Core-generic/LSB-Core-generic/baselib---getpagesize.html
Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
Diffstat (limited to 'winsup/cygwin/shm.cc')
| -rw-r--r-- | winsup/cygwin/shm.cc | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/winsup/cygwin/shm.cc b/winsup/cygwin/shm.cc index e209346f7..1d3200c36 100644 --- a/winsup/cygwin/shm.cc +++ b/winsup/cygwin/shm.cc @@ -21,6 +21,10 @@ details. */ #include "sync.h" #include "ntdll.h" +/* __getpagesize is only available from libcygwin.a */ +#undef SHMLBA +#define SHMLBA (wincap.allocation_granularity ()) + /* * client_request_shm Constructors */ |