diff options
Diffstat (limited to 'gdb/event-loop.c')
| -rw-r--r-- | gdb/event-loop.c | 95 |
1 files changed, 3 insertions, 92 deletions
diff --git a/gdb/event-loop.c b/gdb/event-loop.c index 4f859b1..671528f 100644 --- a/gdb/event-loop.c +++ b/gdb/event-loop.c @@ -1,5 +1,6 @@ /* Event loop machinery for GDB, the GNU debugger. - Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc. + Copyright (C) 1999, 2000, 2001, 2002, 2005, 2006 + Free Software Foundation, Inc. Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions. This file is part of GDB. @@ -37,6 +38,7 @@ #include <sys/time.h> #include "exceptions.h" #include "gdb_assert.h" +#include "gdb_select.h" typedef struct gdb_event gdb_event; typedef void (event_handler_func) (int); @@ -731,97 +733,6 @@ handle_file_event (int event_file_desc) } } -/* Wrapper for select. This function is not yet exported from this - file because it is not sufficiently general. For example, - ser-base.c uses select to check for socket activity, and this - function does not support sockets under Windows, so we do not want - to use gdb_select in ser-base.c. */ - -static int -gdb_select (int n, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, - struct timeval *timeout) -{ -#ifdef USE_WIN32API - HANDLE handles[MAXIMUM_WAIT_OBJECTS]; - HANDLE h; - DWORD event; - DWORD num_handles; - int fd; - int num_ready; - - num_ready = 0; - num_handles = 0; - for (fd = 0; fd < n; ++fd) - { - /* There is no support yet for WRITEFDS. At present, this isn't - used by GDB -- but we do not want to silently ignore WRITEFDS - if something starts using it. */ - gdb_assert (!FD_ISSET (fd, writefds)); - if (!FD_ISSET (fd, readfds) - && !FD_ISSET (fd, exceptfds)) - continue; - h = (HANDLE) _get_osfhandle (fd); - if (h == INVALID_HANDLE_VALUE) - { - /* If the underlying handle is INVALID_HANDLE_VALUE, then - this descriptor is no more. */ - if (FD_ISSET (fd, exceptfds)) - ++num_ready; - continue; - } - /* The only exceptional condition we recognize is a closed file - descriptor. Since we have already checked for that - condition, clear the exceptional bit for this descriptor. */ - FD_CLR (fd, exceptfds); - if (FD_ISSET (fd, readfds)) - { - gdb_assert (num_handles < MAXIMUM_WAIT_OBJECTS); - handles[num_handles++] = h; - } - } - /* If we don't need to wait for any handles, we are done. */ - if (!num_handles) - return num_ready; - event = WaitForMultipleObjects (num_handles, - handles, - FALSE, - timeout - ? (timeout->tv_sec * 1000 + timeout->tv_usec) - : INFINITE); - /* EVENT can only be a value in the WAIT_ABANDONED_0 range if the - HANDLES included an abandoned mutex. Since GDB doesn't use - mutexes, that should never occur. */ - gdb_assert (!(WAIT_ABANDONED_0 <= event - && event < WAIT_ABANDONED_0 + num_handles)); - if (event == WAIT_FAILED) - return -1; - if (event == WAIT_TIMEOUT) - return num_ready; - /* Run through the READFDS, clearing bits corresponding to descriptors - for which input is unavailable. */ - num_ready += num_handles; - h = handles[event - WAIT_OBJECT_0]; - for (fd = 0; fd < n; ++fd) - { - HANDLE fd_h; - if (!FD_ISSET (fd, readfds)) - continue; - fd_h = (HANDLE) _get_osfhandle (fd); - /* This handle might be ready, even though it wasn't the handle - returned by WaitForMultipleObjects. */ - if (fd_h != h && WaitForSingleObject (fd_h, 0) != WAIT_OBJECT_0) - { - FD_CLR (fd, readfds); - --num_ready; - } - } - - return num_ready; -#else - return select (n, readfds, writefds, exceptfds, timeout); -#endif -} - /* Called by gdb_do_one_event to wait for new events on the monitored file descriptors. Queue file events as they are detected by the poll. |