Alexandre Julliard : ws2_32: Convert WS_select to use poll() instead of select(). Also fixes an fd leak.
Module: wine Branch: master Commit: 0082973d938cffe541b24ce11218698a940de9dd URL: http://source.winehq.org/git/wine.git/?a=commit;h=0082973d938cffe541b24ce112... Author: Alexandre Julliard <julliard(a)winehq.org> Date: Mon Nov 6 12:28:53 2006 +0100 ws2_32: Convert WS_select to use poll() instead of select(). Also fixes an fd leak. --- dlls/ws2_32/socket.c | 216 +++++++++++++++++++++++++------------------------- 1 files changed, 109 insertions(+), 107 deletions(-) diff --git a/dlls/ws2_32/socket.c b/dlls/ws2_32/socket.c index b773092..5166d93 100644 --- a/dlls/ws2_32/socket.c +++ b/dlls/ws2_32/socket.c @@ -589,31 +589,6 @@ static char *strdup_lower(const char *st return ret; } -static fd_set* fd_set_import( fd_set* fds, const WS_fd_set* wsfds, int access, int* highfd, int lfd[] ) -{ - /* translate Winsock fd set into local fd set */ - if( wsfds ) - { - unsigned int i; - - FD_ZERO(fds); - for( i = 0; i < wsfds->fd_count; i++ ) - { - int s = wsfds->fd_array[i]; - int fd = get_sock_fd( s, access, NULL ); - if (fd != -1) - { - lfd[ i ] = fd; - if( fd > *highfd ) *highfd = fd; - FD_SET(fd, fds); - } - else lfd[ i ] = -1; - } - return fds; - } - return NULL; -} - inline static int sock_error_p(int s) { unsigned int optval, optlen; @@ -624,50 +599,6 @@ inline static int sock_error_p(int s) return optval != 0; } -static int fd_set_export( const fd_set* fds, fd_set* exceptfds, WS_fd_set* wsfds, int lfd[] ) -{ - int num_err = 0; - - /* translate local fd set into Winsock fd set, adding - * errors to exceptfds (only if app requested it) */ - - if( wsfds ) - { - int i, j, count = wsfds->fd_count; - - for( i = 0, j = 0; i < count; i++ ) - { - int fd = lfd[i]; - SOCKET s = wsfds->fd_array[i]; - if (fd == -1) continue; - if( FD_ISSET(fd, fds) ) - { - if ( exceptfds && sock_error_p(fd) ) - { - FD_SET(fd, exceptfds); - num_err++; - } - else wsfds->fd_array[j++] = s; - } - release_sock_fd( s, fd ); - } - wsfds->fd_count = j; - } - return num_err; -} - -static void fd_set_unimport( WS_fd_set* wsfds, int lfd[] ) -{ - if ( wsfds ) - { - unsigned int i; - - for ( i = 0; i < wsfds->fd_count; i++ ) - if ( lfd[i] >= 0 ) release_sock_fd( wsfds->fd_array[i], lfd[i] ); - wsfds->fd_count = 0; - } -} - /* Utility: get the SO_RCVTIMEO or SO_SNDTIMEO socket option * from an fd and return the value converted to milli seconds * or -1 if there is an infinite time out */ @@ -2437,6 +2368,103 @@ int WINAPI WS_recvfrom(SOCKET s, char *b return n; } +/* allocate a poll array for the corresponding fd sets */ +static struct pollfd *fd_sets_to_poll( const WS_fd_set *readfds, const WS_fd_set *writefds, + const WS_fd_set *exceptfds, int *count_ptr ) +{ + int i, j = 0, count = 0; + struct pollfd *fds; + + if (readfds) count += readfds->fd_count; + if (writefds) count += writefds->fd_count; + if (exceptfds) count += exceptfds->fd_count; + *count_ptr = count; + if (!count) return NULL; + if (!(fds = HeapAlloc( GetProcessHeap(), 0, count * sizeof(fds[0])))) return NULL; + if (readfds) + for (i = 0; i < readfds->fd_count; i++, j++) + { + fds[j].fd = get_sock_fd( readfds->fd_array[i], FILE_READ_DATA, NULL ); + fds[j].events = POLLIN; + fds[j].revents = 0; + } + if (writefds) + for (i = 0; i < writefds->fd_count; i++, j++) + { + fds[j].fd = get_sock_fd( writefds->fd_array[i], FILE_WRITE_DATA, NULL ); + fds[j].events = POLLOUT; + fds[j].revents = 0; + } + if (exceptfds) + for (i = 0; i < exceptfds->fd_count; i++, j++) + { + fds[j].fd = get_sock_fd( exceptfds->fd_array[i], 0, NULL ); + fds[j].events = POLLHUP; + fds[j].revents = 0; + } + return fds; +} + +/* release the file descriptor obtained in fd_sets_to_poll */ +/* must be called with the original fd_set arrays, before calling get_poll_results */ +static void release_poll_fds( const WS_fd_set *readfds, const WS_fd_set *writefds, + const WS_fd_set *exceptfds, struct pollfd *fds ) +{ + int i, j = 0; + + if (readfds) + { + for (i = 0; i < readfds->fd_count; i++, j++) + if (fds[j].fd != -1) release_sock_fd( readfds->fd_array[i], fds[j].fd ); + } + if (writefds) + { + for (i = 0; i < writefds->fd_count; i++, j++) + if (fds[j].fd != -1) release_sock_fd( writefds->fd_array[i], fds[j].fd ); + } + if (exceptfds) + { + for (i = 0; i < exceptfds->fd_count; i++, j++) + if (fds[j].fd != -1) + { + /* make sure we have a real error before releasing the fd */ + if (!sock_error_p( fds[j].fd )) fds[j].revents = 0; + release_sock_fd( exceptfds->fd_array[i], fds[j].fd ); + } + } +} + +/* map the poll results back into the Windows fd sets */ +static int get_poll_results( WS_fd_set *readfds, WS_fd_set *writefds, WS_fd_set *exceptfds, + const struct pollfd *fds ) +{ + int i, j = 0, k, total = 0; + + if (readfds) + { + for (i = k = 0; i < readfds->fd_count; i++, j++) + if (fds[j].revents) readfds->fd_array[k++] = readfds->fd_array[i]; + readfds->fd_count = k; + total += k; + } + if (writefds) + { + for (i = k = 0; i < writefds->fd_count; i++, j++) + if (fds[j].revents) writefds->fd_array[k++] = writefds->fd_array[i]; + writefds->fd_count = k; + total += k; + } + if (exceptfds) + { + for (i = k = 0; i < exceptfds->fd_count; i++, j++) + if (fds[j].revents) exceptfds->fd_array[k++] = exceptfds->fd_array[i]; + exceptfds->fd_count = k; + total += k; + } + return total; +} + + /*********************************************************************** * select (WS2_32.18) */ @@ -2444,53 +2472,27 @@ int WINAPI WS_select(int nfds, WS_fd_set WS_fd_set *ws_writefds, WS_fd_set *ws_exceptfds, const struct WS_timeval* ws_timeout) { - int highfd = 0; - fd_set readfds, writefds, exceptfds; - fd_set *p_read, *p_write, *p_except; - int readfd[FD_SETSIZE], writefd[FD_SETSIZE], exceptfd[FD_SETSIZE]; - struct timeval timeout, *timeoutaddr = NULL; + struct pollfd *pollfds; + int count, ret, timeout = -1; TRACE("read %p, write %p, excp %p timeout %p\n", ws_readfds, ws_writefds, ws_exceptfds, ws_timeout); - p_read = fd_set_import(&readfds, ws_readfds, FILE_READ_DATA, &highfd, readfd); - p_write = fd_set_import(&writefds, ws_writefds, FILE_WRITE_DATA, &highfd, writefd); - p_except = fd_set_import(&exceptfds, ws_exceptfds, 0, &highfd, exceptfd); - if (ws_timeout) + if (!(pollfds = fd_sets_to_poll( ws_readfds, ws_writefds, ws_exceptfds, &count )) && count) { - timeoutaddr = &timeout; - timeout.tv_sec=ws_timeout->tv_sec; - timeout.tv_usec=ws_timeout->tv_usec; + SetLastError( ERROR_NOT_ENOUGH_MEMORY ); + return -1; } - if( (highfd = select(highfd + 1, p_read, p_write, p_except, timeoutaddr)) > 0 ) - { - fd_set_export(&readfds, p_except, ws_readfds, readfd); - fd_set_export(&writefds, p_except, ws_writefds, writefd); + if (ws_timeout) timeout = (ws_timeout->tv_sec * 1000) + (ws_timeout->tv_usec + 999) / 1000; - if (p_except && ws_exceptfds) - { - unsigned int i, j; + ret = poll( pollfds, count, timeout ); + release_poll_fds( ws_readfds, ws_writefds, ws_exceptfds, pollfds ); - for (i = j = 0; i < ws_exceptfds->fd_count; i++) - { - int fd = exceptfd[i]; - SOCKET s = ws_exceptfds->fd_array[i]; - if (fd == -1) continue; - if (FD_ISSET(fd, &exceptfds)) ws_exceptfds->fd_array[j++] = s; - release_sock_fd( s, fd ); - } - ws_exceptfds->fd_count = j; - } - return highfd; - } - fd_set_unimport(ws_readfds, readfd); - fd_set_unimport(ws_writefds, writefd); - fd_set_unimport(ws_exceptfds, exceptfd); - - if( highfd == 0 ) return 0; - SetLastError(wsaErrno()); - return SOCKET_ERROR; + if (ret == -1) SetLastError(wsaErrno()); + else ret = get_poll_results( ws_readfds, ws_writefds, ws_exceptfds, pollfds ); + HeapFree( GetProcessHeap(), 0, pollfds ); + return ret; }
participants (1)
-
Alexandre Julliard