path: root/win32
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authornormal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2018-11-22 08:46:51 (GMT)
committernormal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2018-11-22 08:46:51 (GMT)
commit6a65f2b1e479f268489b51a004b6c153c634c68a (patch)
tree5e7bae4d2418fd88b152380075eb6a1f21f2401b /win32
parentb009de13bf4bb7c96964c404fb56b3503db777fd (diff)
io + socket: make pipes and sockets nonblocking by default
All normal Ruby IO methods (IO#read, IO#gets, IO#write, ...) are all capable of appearing to be "blocking" when presented with a file description with the O_NONBLOCK flag set; so there is little risk of incompatibility within Ruby-using programs. The biggest compatibility risk is when spawning external programs. As a result, stdin, stdout, and stderr are now always made blocking before exec-family calls. This change will make an event-oriented MJIT usable if it is waiting on pipes on POSIX_like platforms. It is ALSO necessary to take advantage of (proposed lightweight concurrency (aka "auto-Fiber") or any similar proposal for network concurrency: Named-pipe (FIFO) are NOT yet non-blocking by default since they are rarely-used and may introduce compatibility problems and extra syscall overhead for a common path. Please revert this commit if there are problems and if I am afk since I am afk a lot, lately. [ruby-core:89950] [Bug #14968] git-svn-id: svn+ssh:// b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'win32')
1 files changed, 14 insertions, 3 deletions
diff --git a/win32/win32.c b/win32/win32.c
index 820b16c..d28bd56 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -4429,11 +4429,11 @@ fcntl(int fd, int cmd, ...)
/* License: Ruby's */
-rb_w32_set_nonblock(int fd)
+rb_w32_set_nonblock2(int fd, int nonblock)
SOCKET sock = TO_SOCKET(fd);
if (is_socket(sock)) {
- return setfl(sock, O_NONBLOCK);
+ return setfl(sock, nonblock ? O_NONBLOCK : 0);
else if (is_pipe(sock)) {
DWORD state;
@@ -4441,7 +4441,12 @@ rb_w32_set_nonblock(int fd)
errno = map_errno(GetLastError());
return -1;
- state |= PIPE_NOWAIT;
+ if (nonblock) {
+ state |= PIPE_NOWAIT;
+ }
+ else {
+ state &= ~PIPE_NOWAIT;
+ }
if (!SetNamedPipeHandleState((HANDLE)sock, &state, NULL, NULL)) {
errno = map_errno(GetLastError());
return -1;
@@ -4454,6 +4459,12 @@ rb_w32_set_nonblock(int fd)
+rb_w32_set_nonblock(int fd)
+ return rb_w32_set_nonblock2(fd, TRUE);
#ifndef WNOHANG
#define WNOHANG -1