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Fixed OSX CPU utilization by replacing broken kevent() with select()

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This commit is contained in:
Mike Selivanov 2015-07-09 01:11:40 +03:00
parent ff49706373
commit 29d330522d
1 changed files with 24 additions and 18 deletions
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42
src/Mayaqua/Network.c
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@ -9124,12 +9124,23 @@ void UnixSetSockEvent(SOCK_EVENT *event)
}
}
// This is a helper function for select()
int safe_fd_set(int fd, fd_set* fds, int* max_fd) {
FD_SET(fd, fds);
if (fd > *max_fd) {
*max_fd = fd;
}
return 0;
}
// Execute 'select' for the socket
void UnixSelectInner(UINT num_read, UINT *reads, UINT num_write, UINT *writes, UINT timeout)
{
#ifdef UNIX_MACOS
int kq;
struct kevent *kevents;
fd_set rfds; //read descriptors
fd_set wfds; //write descriptors
int max_fd = 0; //maximum descriptor id
struct timeval tv; //timeval for timeout
#else // UNIX_MACOS
struct pollfd *p;
#endif // UNIX_MACOS
@ -9170,8 +9181,8 @@ void UnixSelectInner(UINT num_read, UINT *reads, UINT num_write, UINT *writes, U
num = num_read_total + num_write_total;
#ifdef UNIX_MACOS
kq = kqueue();
kevents = ZeroMallocFast(sizeof(struct kevent) * (num + num_write_total));
FD_ZERO(&rfds); //zero out descriptor set for read descriptors
FD_ZERO(&wfds); //same for write
#else // UNIX_MACOS
p = ZeroMallocFast(sizeof(struct pollfd) * num);
#endif // UNIX_MACOS
@ -9183,7 +9194,7 @@ void UnixSelectInner(UINT num_read, UINT *reads, UINT num_write, UINT *writes, U
if (reads[i] != INVALID_SOCKET)
{
#ifdef UNIX_MACOS
EV_SET(&kevents[n++], reads[i], EVFILT_READ, EV_ADD, 0, 0, NULL);
safe_fd_set(reads[i], &rfds, &max_fd);
#else // UNIX_MACOS
struct pollfd *pfd = &p[n++];
pfd->fd = reads[i];
@ -9197,8 +9208,7 @@ void UnixSelectInner(UINT num_read, UINT *reads, UINT num_write, UINT *writes, U
if (writes[i] != INVALID_SOCKET)
{
#ifdef UNIX_MACOS
EV_SET(&kevents[n++], reads[i], EVFILT_READ, EV_ADD, 0, 0, NULL);
EV_SET(&kevents[n++], reads[i], EVFILT_WRITE, EV_ADD, 0, 0, NULL);
safe_fd_set(writes[i], &wfds, &max_fd);
#else // UNIX_MACOS
struct pollfd *pfd = &p[n++];
pfd->fd = writes[i];
@ -9210,15 +9220,14 @@ void UnixSelectInner(UINT num_read, UINT *reads, UINT num_write, UINT *writes, U
if (num != 0)
{
#ifdef UNIX_MACOS
struct timespec kevent_timeout, *p_kevent_timeout;
if (timeout == INFINITE) {
p_kevent_timeout = NULL;
tv.tv_sec = 0;
tv.tv_usec = 0;
} else {
kevent_timeout.tv_sec = timeout / 1000;
kevent_timeout.tv_nsec = (timeout % 1000) * 1000000l;
p_kevent_timeout = &kevent_timeout;
tv.tv_sec = timeout / 1000;
tv.tv_usec = (timeout % 1000) * 1000l;
}
kevent(kq, kevents, n, kevents, n, p_kevent_timeout);
select(max_fd + 1, &rfds, &wfds, NULL, &tv);
#else // UNIX_MACOS
poll(p, num, timeout == INFINITE ? -1 : (int)timeout);
#endif // UNIX_MACOS
@ -9228,12 +9237,9 @@ void UnixSelectInner(UINT num_read, UINT *reads, UINT num_write, UINT *writes, U
SleepThread(timeout);
}
#ifdef UNIX_MACOS
Free(kevents);
close(kq);
#else // UNIX_MACOS
#ifndef UNIX_MACOS
Free(p);
#endif // UNIX_MACOS
#endif // not UNIX_MACOS
}
// Clean-up of the socket event