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-rw-r--r--README.embed17
1 files changed, 13 insertions, 4 deletions
diff --git a/README.embed b/README.embed
index d168cc5..b7e3ea4 100644
--- a/README.embed
+++ b/README.embed
@@ -106,7 +106,17 @@ PREPROCESSOR SYMBOLS
done: if no other method takes over, select will be it. Otherwise
the select backend will not be compiled in.
- EV_SELECT_USE_WIN32_HANDLES
+ EV_SELECT_USE_FD_SET
+
+ If defined to 1, then the select backend will use the system fd_set
+ structure. This is useful if libev doesn't compile due to a missing
+ NFDBITS or fd_mask definition or it misguesses the bitset layout on
+ exotic systems. This usually limits the range of file descriptors
+ to some low limit such as 1024 or might have other limitations
+ (winsocket only allows 64 sockets). The FD_SETSIZE macro, set
+ before compilation, might influence the size of the fd_set used.
+
+ EV_SELECT_IS_WINSOCKET
When defined to 1, the select backend will assume that select
doesn't understand file descriptors but wants osf handles on
@@ -118,9 +128,8 @@ PREPROCESSOR SYMBOLS
EV_USE_POLL
If defined to be "1", libev will compile in support for the poll(2)
- backend. No attempt at autodetection will be done. poll usually
- performs worse than select, so its not enabled by default (it is
- also slightly less portable).
+ backend. Otherwise it will be enabled on non-win32 platforms. It
+ takes precedence over select.
EV_USE_EPOLL