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Diffstat (limited to '3rdParty/Boost/src/boost/asio/detail/impl/descriptor_ops.ipp')
-rw-r--r--3rdParty/Boost/src/boost/asio/detail/impl/descriptor_ops.ipp85
1 files changed, 75 insertions, 10 deletions
diff --git a/3rdParty/Boost/src/boost/asio/detail/impl/descriptor_ops.ipp b/3rdParty/Boost/src/boost/asio/detail/impl/descriptor_ops.ipp
index 9a2bb3b..ca2222c 100644
--- a/3rdParty/Boost/src/boost/asio/detail/impl/descriptor_ops.ipp
+++ b/3rdParty/Boost/src/boost/asio/detail/impl/descriptor_ops.ipp
@@ -43,8 +43,19 @@ int close(int d, state_type& state, boost::system::error_code& ec)
int result = 0;
if (d != -1)
{
- if (state & internal_non_blocking)
+ errno = 0;
+ result = error_wrapper(::close(d), ec);
+
+ if (result != 0
+ && (ec == boost::asio::error::would_block
+ || ec == boost::asio::error::try_again))
{
+ // According to UNIX Network Programming Vol. 1, it is possible for
+ // close() to fail with EWOULDBLOCK under certain circumstances. What
+ // isn't clear is the state of the descriptor after this error. The one
+ // current OS where this behaviour is seen, Windows, says that the socket
+ // remains open. Therefore we'll put the descriptor back into blocking
+ // mode and have another attempt at closing it.
#if defined(__SYMBIAN32__)
int flags = ::fcntl(d, F_GETFL, 0);
if (flags >= 0)
@@ -53,11 +64,11 @@ int close(int d, state_type& state, boost::system::error_code& ec)
ioctl_arg_type arg = 0;
::ioctl(d, FIONBIO, &arg);
#endif // defined(__SYMBIAN32__)
- state &= ~internal_non_blocking;
- }
+ state &= ~non_blocking;
- errno = 0;
- result = error_wrapper(::close(d), ec);
+ errno = 0;
+ result = error_wrapper(::close(d), ec);
+ }
}
if (result == 0)
@@ -65,8 +76,49 @@ int close(int d, state_type& state, boost::system::error_code& ec)
return result;
}
-bool set_internal_non_blocking(int d,
- state_type& state, boost::system::error_code& ec)
+bool set_user_non_blocking(int d, state_type& state,
+ bool value, boost::system::error_code& ec)
+{
+ if (d == -1)
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return false;
+ }
+
+ errno = 0;
+#if defined(__SYMBIAN32__)
+ int result = error_wrapper(::fcntl(d, F_GETFL, 0), ec);
+ if (result >= 0)
+ {
+ errno = 0;
+ int flag = (value ? (result | O_NONBLOCK) : (result & ~O_NONBLOCK));
+ result = error_wrapper(::fcntl(d, F_SETFL, flag), ec);
+ }
+#else // defined(__SYMBIAN32__)
+ ioctl_arg_type arg = (value ? 1 : 0);
+ int result = error_wrapper(::ioctl(d, FIONBIO, &arg), ec);
+#endif // defined(__SYMBIAN32__)
+
+ if (result >= 0)
+ {
+ ec = boost::system::error_code();
+ if (value)
+ state |= user_set_non_blocking;
+ else
+ {
+ // Clearing the user-set non-blocking mode always overrides any
+ // internally-set non-blocking flag. Any subsequent asynchronous
+ // operations will need to re-enable non-blocking I/O.
+ state &= ~(user_set_non_blocking | internal_non_blocking);
+ }
+ return true;
+ }
+
+ return false;
+}
+
+bool set_internal_non_blocking(int d, state_type& state,
+ bool value, boost::system::error_code& ec)
{
if (d == -1)
{
@@ -74,23 +126,36 @@ bool set_internal_non_blocking(int d,
return false;
}
+ if (!value && (state & user_set_non_blocking))
+ {
+ // It does not make sense to clear the internal non-blocking flag if the
+ // user still wants non-blocking behaviour. Return an error and let the
+ // caller figure out whether to update the user-set non-blocking flag.
+ ec = boost::asio::error::invalid_argument;
+ return false;
+ }
+
errno = 0;
#if defined(__SYMBIAN32__)
int result = error_wrapper(::fcntl(d, F_GETFL, 0), ec);
if (result >= 0)
{
errno = 0;
- result = error_wrapper(::fcntl(d, F_SETFL, result | O_NONBLOCK), ec);
+ int flag = (value ? (result | O_NONBLOCK) : (result & ~O_NONBLOCK));
+ result = error_wrapper(::fcntl(d, F_SETFL, flag), ec);
}
#else // defined(__SYMBIAN32__)
- ioctl_arg_type arg = 1;
+ ioctl_arg_type arg = (value ? 1 : 0);
int result = error_wrapper(::ioctl(d, FIONBIO, &arg), ec);
#endif // defined(__SYMBIAN32__)
if (result >= 0)
{
ec = boost::system::error_code();
- state |= internal_non_blocking;
+ if (value)
+ state |= internal_non_blocking;
+ else
+ state &= ~internal_non_blocking;
return true;
}