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Extend use of poll() to Apple systems in addition to Linux and Fuchsia

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To address the limitations of select(), poll() is now used for Apple
(MacOS and iOS) systems in the PhysicalSocketServer.

Bug: webrtc:15421, webrtc:15908
Change-Id: Ic6703a08653ca608a714ea37ecbbfeaf29743c1f
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/316480
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org>
Commit-Queue: Daniel.L (Byoungchan) Lee <daniel.l@hpcnt.com>
Cr-Commit-Position: refs/heads/main@{#42075}
This commit is contained in:
Byoungchan Lee 2024-04-16 11:06:08 +09:00 committed by WebRTC LUCI CQ
parent e33313f801
commit d86c0cdbde
2 changed files with 15 additions and 10 deletions
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18
rtc_base/physical_socket_server.cc
View File

@ -98,15 +98,15 @@ int64_t GetSocketRecvTimestamp(int socket) {
typedef char* SockOptArg;
#endif
#if defined(WEBRTC_USE_EPOLL)
#if defined(WEBRTC_LINUX)
// POLLRDHUP / EPOLLRDHUP are only defined starting with Linux 2.6.17.
#if !defined(POLLRDHUP)
#define POLLRDHUP 0x2000
#endif
#endif // !defined(POLLRDHUP)
#if !defined(EPOLLRDHUP)
#define EPOLLRDHUP 0x2000
#endif
#endif
#endif // !defined(EPOLLRDHUP)
#endif // defined(WEBRTC_LINUX)
namespace {
@ -1489,7 +1489,15 @@ static void ProcessEvents(Dispatcher* dispatcher,
static void ProcessPollEvents(Dispatcher* dispatcher, const pollfd& pfd) {
bool readable = (pfd.revents & (POLLIN | POLLPRI));
bool writable = (pfd.revents & POLLOUT);
bool error = (pfd.revents & (POLLRDHUP | POLLERR | POLLHUP));
// Linux and Fuchsia define POLLRDHUP, which is set when the peer has
// disconnected. On other platforms, we only check for POLLHUP.
#if defined(WEBRTC_LINUX) || defined(WEBRTC_FUCHSIA)
constexpr short kEvents = POLLRDHUP | POLLERR | POLLHUP;
#else
constexpr short kEvents = POLLERR | POLLHUP;
#endif
bool error = (pfd.revents & kEvents);
ProcessEvents(dispatcher, readable, writable, error, error);
}

7
rtc_base/physical_socket_server.h
View File

@ -23,7 +23,7 @@
#include <sys/epoll.h>
#define WEBRTC_USE_EPOLL 1
#elif defined(WEBRTC_FUCHSIA)
#elif defined(WEBRTC_FUCHSIA) || defined(WEBRTC_MAC)
// Fuchsia implements select and poll but not epoll, and testing shows that poll
// is faster than select.
#include <poll.h>
@ -31,7 +31,7 @@
#define WEBRTC_USE_POLL 1
#else
// On other POSIX systems, use select by default.
#endif // WEBRTC_LINUX, WEBRTC_FUCHSIA
#endif // WEBRTC_LINUX, WEBRTC_FUCHSIA, WEBRTC_MAC
#endif // WEBRTC_POSIX
#include <array>
@ -125,9 +125,6 @@ class RTC_EXPORT PhysicalSocketServer : public SocketServer {
const int epoll_fd_ = INVALID_SOCKET;
#elif defined(WEBRTC_USE_POLL)
void AddPoll(Dispatcher* dispatcher, uint64_t key);
void RemovePoll(Dispatcher* dispatcher);
void UpdatePoll(Dispatcher* dispatcher, uint64_t key);
bool WaitPoll(int cmsWait, bool process_io);
#endif // WEBRTC_USE_EPOLL, WEBRTC_USE_POLL