/* Event loop machinery for GDB, the GNU debugger.
- Copyright 1999 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2000, 2001, 2002, 2005, 2006, 2007, 2008
+ Free Software Foundation, Inc.
Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "top.h"
#include "event-loop.h"
#include "event-top.h"
+
#ifdef HAVE_POLL
+#if defined (HAVE_POLL_H)
#include <poll.h>
-#else
-#include <sys/types.h>
-#endif
-#include <errno.h>
-#include <setjmp.h>
-#include <sys/time.h>
-
-/* Type of the mask arguments to select. */
-
-#ifndef NO_FD_SET
-#define SELECT_MASK fd_set
-#else
-#ifndef _AIX
-typedef long fd_mask;
-#endif
-#if defined(_IBMR2)
-#define SELECT_MASK void
-#else
-#define SELECT_MASK int
+#elif defined (HAVE_SYS_POLL_H)
+#include <sys/poll.h>
#endif
#endif
-/* Define "NBBY" (number of bits per byte) if it's not already defined. */
-
-#ifndef NBBY
-#define NBBY 8
-#endif
-
-
-/* Define the number of fd_masks in an fd_set */
-
-#ifndef FD_SETSIZE
-#ifdef OPEN_MAX
-#define FD_SETSIZE OPEN_MAX
-#else
-#define FD_SETSIZE 256
-#endif
-#endif
-#if !defined(howmany)
-#define howmany(x, y) (((x)+((y)-1))/(y))
-#endif
-#ifndef NFDBITS
-#define NFDBITS NBBY*sizeof(fd_mask)
-#endif
-#define MASK_SIZE howmany(FD_SETSIZE, NFDBITS)
-
+#include <sys/types.h>
+#include "gdb_string.h"
+#include <errno.h>
+#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);
ready. The procedure PROC associated with each event is always the
same (handle_file_event). Its duty is to invoke the handler
associated with the file descriptor whose state change generated
- the event, plus doing other cleanups adn such. */
+ the event, plus doing other cleanups and such. */
struct gdb_event
{
/* As of 1999-04-30 only the input file descriptor is registered with the
event loop. */
+/* Do we use poll or select ? */
#ifdef HAVE_POLL
-/* Poll based implementation of the notifier. */
+#define USE_POLL 1
+#else
+#define USE_POLL 0
+#endif /* HAVE_POLL */
+
+static unsigned char use_poll = USE_POLL;
+
+#ifdef USE_WIN32API
+#include <windows.h>
+#include <io.h>
+#endif
static struct
{
/* Ptr to head of file handler list. */
file_handler *first_file_handler;
+#ifdef HAVE_POLL
/* Ptr to array of pollfd structures. */
struct pollfd *poll_fds;
- /* Number of file descriptors to monitor. */
- int num_fds;
-
/* Timeout in milliseconds for calls to poll(). */
- int timeout;
-
- /* Flag to tell whether the timeout value shuld be used. */
- int timeout_valid;
- }
-gdb_notifier;
-
-#else /* ! HAVE_POLL */
-
-/* Select based implementation of the notifier. */
-
-static struct
- {
- /* Ptr to head of file handler list. */
- file_handler *first_file_handler;
+ int poll_timeout;
+#endif
/* Masks to be used in the next call to select.
Bits are set in response to calls to create_file_handler. */
- fd_mask check_masks[3 * MASK_SIZE];
+ fd_set check_masks[3];
/* What file descriptors were found ready by select. */
- fd_mask ready_masks[3 * MASK_SIZE];
+ fd_set ready_masks[3];
- /* Number of valid bits (highest fd value + 1). */
+ /* Number of file descriptors to monitor. (for poll) */
+ /* Number of valid bits (highest fd value + 1). (for select) */
int num_fds;
/* Time structure for calls to select(). */
- struct timeval timeout;
+ struct timeval select_timeout;
- /* Flag to tell whether the timeout struct should be used. */
+ /* Flag to tell whether the timeout should be used. */
int timeout_valid;
}
gdb_notifier;
-#endif /* HAVE_POLL */
-
/* Structure associated with a timer. PROC will be executed at the
first occasion after WHEN. */
struct gdb_timer
}
sighandler_list;
-/* Is any of the handlers ready? Check this variable using
+/* Are any of the handlers ready? Check this variable using
check_async_ready. This is used by process_event, to determine
whether or not to invoke the invoke_async_signal_handler
function. */
static void invoke_async_signal_handler (void);
static void handle_file_event (int event_file_desc);
static int gdb_wait_for_event (void);
-static int gdb_do_one_event (void *data);
static int check_async_ready (void);
static void async_queue_event (gdb_event * event_ptr, queue_position position);
static gdb_event *create_file_event (int fd);
if (event_ptr->next_event == NULL)
event_queue.last_event = prev_ptr;
}
- free ((char *) event_ptr);
+ xfree (event_ptr);
- /* Now call the procedure associted with the event. */
+ /* Now call the procedure associated with the event. */
(*proc) (fd);
return 1;
}
wait for something to happen (via gdb_wait_for_event), then process
it. Returns >0 if something was done otherwise returns <0 (this
can happen if there are no event sources to wait for). If an error
- occures catch_errors() which calls this function returns zero. */
+ occurs catch_errors() which calls this function returns zero. */
-static int
+int
gdb_do_one_event (void *data)
{
/* Any events already waiting in the queue? */
{
return 1;
}
-
+
/* Are any timers that are ready? If so, put an event on the queue. */
poll_timers ();
-
+
/* Wait for a new event. If gdb_wait_for_event returns -1,
we should get out because this means that there are no
event sources left. This will make the event loop stop,
and the application exit. */
-
+
if (gdb_wait_for_event () < 0)
{
return -1;
}
-
+
/* Handle any new events occurred while waiting. */
if (process_event ())
{
return 1;
}
-
+
/* If gdb_wait_for_event has returned 1, it means that one
event has been handled. We break out of the loop. */
return 1;
longer any event sources registered. */
while (1)
{
- int result = catch_errors (gdb_do_one_event, 0, "", RETURN_MASK_ALL);
- if (result < 0)
+ int gdb_result;
+
+ gdb_result = catch_errors (gdb_do_one_event, 0, "", RETURN_MASK_ALL);
+ if (gdb_result < 0)
break;
- if (result == 0)
+
+ /* If we long-jumped out of do_one_event, we probably
+ didn't get around to resetting the prompt, which leaves
+ readline in a messed-up state. Reset it here. */
+
+ if (gdb_result == 0)
{
/* FIXME: this should really be a call to a hook that is
interface specific, because interfaces can display the
prompt in their own way. */
display_gdb_prompt (0);
+ /* This call looks bizarre, but it is required. If the user
+ entered a command that caused an error,
+ after_char_processing_hook won't be called from
+ rl_callback_read_char_wrapper. Using a cleanup there
+ won't work, since we want this function to be called
+ after a new prompt is printed. */
+ if (after_char_processing_hook)
+ (*after_char_processing_hook) ();
/* Maybe better to set a flag to be checked somewhere as to
whether display the prompt or not. */
}
add_file_handler (int fd, handler_func * proc, gdb_client_data client_data)
{
#ifdef HAVE_POLL
- create_file_handler (fd, POLLIN, proc, client_data);
+ struct pollfd fds;
+#endif
+
+ if (use_poll)
+ {
+#ifdef HAVE_POLL
+ /* Check to see if poll () is usable. If not, we'll switch to
+ use select. This can happen on systems like
+ m68k-motorola-sys, `poll' cannot be used to wait for `stdin'.
+ On m68k-motorola-sysv, tty's are not stream-based and not
+ `poll'able. */
+ fds.fd = fd;
+ fds.events = POLLIN;
+ if (poll (&fds, 1, 0) == 1 && (fds.revents & POLLNVAL))
+ use_poll = 0;
#else
- create_file_handler (fd, GDB_READABLE | GDB_EXCEPTION, proc, client_data);
+ internal_error (__FILE__, __LINE__,
+ _("use_poll without HAVE_POLL"));
+#endif /* HAVE_POLL */
+ }
+ if (use_poll)
+ {
+#ifdef HAVE_POLL
+ create_file_handler (fd, POLLIN, proc, client_data);
+#else
+ internal_error (__FILE__, __LINE__,
+ _("use_poll without HAVE_POLL"));
#endif
+ }
+ else
+ create_file_handler (fd, GDB_READABLE | GDB_EXCEPTION, proc, client_data);
}
/* Add a file handler/descriptor to the list of descriptors we are
{
file_handler *file_ptr;
-#ifndef HAVE_POLL
- int index, bit;
-#endif
-
/* Do we already have a file handler for this file? (We may be
changing its associated procedure). */
for (file_ptr = gdb_notifier.first_file_handler; file_ptr != NULL;
file_ptr->ready_mask = 0;
file_ptr->next_file = gdb_notifier.first_file_handler;
gdb_notifier.first_file_handler = file_ptr;
-#ifdef HAVE_POLL
- gdb_notifier.num_fds++;
-#endif
- }
- file_ptr->proc = proc;
- file_ptr->client_data = client_data;
- file_ptr->mask = mask;
+ if (use_poll)
+ {
#ifdef HAVE_POLL
+ gdb_notifier.num_fds++;
+ if (gdb_notifier.poll_fds)
+ gdb_notifier.poll_fds =
+ (struct pollfd *) xrealloc (gdb_notifier.poll_fds,
+ (gdb_notifier.num_fds
+ * sizeof (struct pollfd)));
+ else
+ gdb_notifier.poll_fds =
+ (struct pollfd *) xmalloc (sizeof (struct pollfd));
+ (gdb_notifier.poll_fds + gdb_notifier.num_fds - 1)->fd = fd;
+ (gdb_notifier.poll_fds + gdb_notifier.num_fds - 1)->events = mask;
+ (gdb_notifier.poll_fds + gdb_notifier.num_fds - 1)->revents = 0;
+#else
+ internal_error (__FILE__, __LINE__,
+ _("use_poll without HAVE_POLL"));
+#endif /* HAVE_POLL */
+ }
+ else
+ {
+ if (mask & GDB_READABLE)
+ FD_SET (fd, &gdb_notifier.check_masks[0]);
+ else
+ FD_CLR (fd, &gdb_notifier.check_masks[0]);
- if (gdb_notifier.poll_fds)
- gdb_notifier.poll_fds =
- (struct pollfd *) realloc (gdb_notifier.poll_fds,
- (gdb_notifier.num_fds) * sizeof (struct pollfd));
- else
- gdb_notifier.poll_fds =
- (struct pollfd *) xmalloc (sizeof (struct pollfd));
- (gdb_notifier.poll_fds + gdb_notifier.num_fds - 1)->fd = fd;
- (gdb_notifier.poll_fds + gdb_notifier.num_fds - 1)->events = mask;
- (gdb_notifier.poll_fds + gdb_notifier.num_fds - 1)->revents = 0;
-
-#else /* ! HAVE_POLL */
-
- index = fd / (NBBY * sizeof (fd_mask));
- bit = 1 << (fd % (NBBY * sizeof (fd_mask)));
-
- if (mask & GDB_READABLE)
- gdb_notifier.check_masks[index] |= bit;
- else
- gdb_notifier.check_masks[index] &= ~bit;
-
- if (mask & GDB_WRITABLE)
- (gdb_notifier.check_masks + MASK_SIZE)[index] |= bit;
- else
- (gdb_notifier.check_masks + MASK_SIZE)[index] &= ~bit;
+ if (mask & GDB_WRITABLE)
+ FD_SET (fd, &gdb_notifier.check_masks[1]);
+ else
+ FD_CLR (fd, &gdb_notifier.check_masks[1]);
- if (mask & GDB_EXCEPTION)
- (gdb_notifier.check_masks + 2 * (MASK_SIZE))[index] |= bit;
- else
- (gdb_notifier.check_masks + 2 * (MASK_SIZE))[index] &= ~bit;
+ if (mask & GDB_EXCEPTION)
+ FD_SET (fd, &gdb_notifier.check_masks[2]);
+ else
+ FD_CLR (fd, &gdb_notifier.check_masks[2]);
- if (gdb_notifier.num_fds <= fd)
- gdb_notifier.num_fds = fd + 1;
+ if (gdb_notifier.num_fds <= fd)
+ gdb_notifier.num_fds = fd + 1;
+ }
+ }
-#endif /* HAVE_POLL */
+ file_ptr->proc = proc;
+ file_ptr->client_data = client_data;
+ file_ptr->mask = mask;
}
/* Remove the file descriptor FD from the list of monitored fd's:
delete_file_handler (int fd)
{
file_handler *file_ptr, *prev_ptr = NULL;
- int i, j;
+ int i;
+#ifdef HAVE_POLL
+ int j;
struct pollfd *new_poll_fds;
-#ifndef HAVE_POLL
- int index, bit;
- unsigned long flags;
#endif
/* Find the entry for the given file. */
if (file_ptr == NULL)
return;
+ if (use_poll)
+ {
#ifdef HAVE_POLL
- /* Create a new poll_fds array by copying every fd's information but the
- one we want to get rid of. */
+ /* Create a new poll_fds array by copying every fd's information but the
+ one we want to get rid of. */
- new_poll_fds =
- (struct pollfd *) xmalloc ((gdb_notifier.num_fds - 1) * sizeof (struct pollfd));
+ new_poll_fds =
+ (struct pollfd *) xmalloc ((gdb_notifier.num_fds - 1) * sizeof (struct pollfd));
- for (i = 0, j = 0; i < gdb_notifier.num_fds; i++)
- {
- if ((gdb_notifier.poll_fds + i)->fd != fd)
+ for (i = 0, j = 0; i < gdb_notifier.num_fds; i++)
{
- (new_poll_fds + j)->fd = (gdb_notifier.poll_fds + i)->fd;
- (new_poll_fds + j)->events = (gdb_notifier.poll_fds + i)->events;
- (new_poll_fds + j)->revents = (gdb_notifier.poll_fds + i)->revents;
- j++;
+ if ((gdb_notifier.poll_fds + i)->fd != fd)
+ {
+ (new_poll_fds + j)->fd = (gdb_notifier.poll_fds + i)->fd;
+ (new_poll_fds + j)->events = (gdb_notifier.poll_fds + i)->events;
+ (new_poll_fds + j)->revents = (gdb_notifier.poll_fds + i)->revents;
+ j++;
+ }
}
+ xfree (gdb_notifier.poll_fds);
+ gdb_notifier.poll_fds = new_poll_fds;
+ gdb_notifier.num_fds--;
+#else
+ internal_error (__FILE__, __LINE__,
+ _("use_poll without HAVE_POLL"));
+#endif /* HAVE_POLL */
}
- free (gdb_notifier.poll_fds);
- gdb_notifier.poll_fds = new_poll_fds;
- gdb_notifier.num_fds--;
-
-#else /* ! HAVE_POLL */
-
- index = fd / (NBBY * sizeof (fd_mask));
- bit = 1 << (fd % (NBBY * sizeof (fd_mask)));
-
- if (file_ptr->mask & GDB_READABLE)
- gdb_notifier.check_masks[index] &= ~bit;
- if (file_ptr->mask & GDB_WRITABLE)
- (gdb_notifier.check_masks + MASK_SIZE)[index] &= ~bit;
- if (file_ptr->mask & GDB_EXCEPTION)
- (gdb_notifier.check_masks + 2 * (MASK_SIZE))[index] &= ~bit;
+ else
+ {
+ if (file_ptr->mask & GDB_READABLE)
+ FD_CLR (fd, &gdb_notifier.check_masks[0]);
+ if (file_ptr->mask & GDB_WRITABLE)
+ FD_CLR (fd, &gdb_notifier.check_masks[1]);
+ if (file_ptr->mask & GDB_EXCEPTION)
+ FD_CLR (fd, &gdb_notifier.check_masks[2]);
- /* Find current max fd. */
+ /* Find current max fd. */
- if ((fd + 1) == gdb_notifier.num_fds)
- {
- for (gdb_notifier.num_fds = 0; index >= 0; index--)
+ if ((fd + 1) == gdb_notifier.num_fds)
{
- flags = gdb_notifier.check_masks[index]
- | (gdb_notifier.check_masks + MASK_SIZE)[index]
- | (gdb_notifier.check_masks + 2 * (MASK_SIZE))[index];
- if (flags)
+ gdb_notifier.num_fds--;
+ for (i = gdb_notifier.num_fds; i; i--)
{
- for (i = (NBBY * sizeof (fd_mask)); i > 0; i--)
- {
- if (flags & (((unsigned long) 1) << (i - 1)))
- break;
- }
- gdb_notifier.num_fds = index * (NBBY * sizeof (fd_mask)) + i;
- break;
+ if (FD_ISSET (i - 1, &gdb_notifier.check_masks[0])
+ || FD_ISSET (i - 1, &gdb_notifier.check_masks[1])
+ || FD_ISSET (i - 1, &gdb_notifier.check_masks[2]))
+ break;
}
+ gdb_notifier.num_fds = i;
}
}
-#endif /* HAVE_POLL */
/* Deactivate the file descriptor, by clearing its mask,
so that it will not fire again. */
;
prev_ptr->next_file = file_ptr->next_file;
}
- free ((char *) file_ptr);
+ xfree (file_ptr);
}
/* Handle the given event by calling the procedure associated to the
/* See if the desired events (mask) match the received
events (ready_mask). */
+ if (use_poll)
+ {
#ifdef HAVE_POLL
- error_mask = POLLHUP | POLLERR | POLLNVAL;
- mask = (file_ptr->ready_mask & file_ptr->mask) |
- (file_ptr->ready_mask & error_mask);
- error_mask_returned = mask & error_mask;
+ error_mask = POLLHUP | POLLERR | POLLNVAL;
+ mask = (file_ptr->ready_mask & file_ptr->mask) |
+ (file_ptr->ready_mask & error_mask);
+ error_mask_returned = mask & error_mask;
- if (error_mask_returned != 0)
- {
- /* Work in progress. We may need to tell somebody what
- kind of error we had. */
- /*if (error_mask_returned & POLLHUP)
- printf_unfiltered ("Hangup detected on fd %d\n", file_ptr->fd);
- if (error_mask_returned & POLLERR)
- printf_unfiltered ("Error detected on fd %d\n", file_ptr->fd);
- if (error_mask_returned & POLLNVAL)
- printf_unfiltered ("Invalid fd %d\n", file_ptr->fd); */
- file_ptr->error = 1;
+ if (error_mask_returned != 0)
+ {
+ /* Work in progress. We may need to tell somebody what
+ kind of error we had. */
+ if (error_mask_returned & POLLHUP)
+ printf_unfiltered (_("Hangup detected on fd %d\n"), file_ptr->fd);
+ if (error_mask_returned & POLLERR)
+ printf_unfiltered (_("Error detected on fd %d\n"), file_ptr->fd);
+ if (error_mask_returned & POLLNVAL)
+ printf_unfiltered (_("Invalid or non-`poll'able fd %d\n"), file_ptr->fd);
+ file_ptr->error = 1;
+ }
+ else
+ file_ptr->error = 0;
+#else
+ internal_error (__FILE__, __LINE__,
+ _("use_poll without HAVE_POLL"));
+#endif /* HAVE_POLL */
}
else
- file_ptr->error = 0;
-#else /* ! HAVE_POLL */
- if (file_ptr->ready_mask & GDB_EXCEPTION)
{
- printf_unfiltered ("Exception condition detected on fd %d\n", file_ptr->fd);
- file_ptr->error = 1;
+ if (file_ptr->ready_mask & GDB_EXCEPTION)
+ {
+ printf_unfiltered (_("Exception condition detected on fd %d\n"), file_ptr->fd);
+ file_ptr->error = 1;
+ }
+ else
+ file_ptr->error = 0;
+ mask = file_ptr->ready_mask & file_ptr->mask;
}
- else
- file_ptr->error = 0;
- mask = file_ptr->ready_mask & file_ptr->mask;
-#endif /* HAVE_POLL */
/* Clear the received events for next time around. */
file_ptr->ready_mask = 0;
int num_found = 0;
int i;
-#ifndef HAVE_POLL
- int mask, bit, index;
-#endif
-
/* Make sure all output is done before getting another event. */
gdb_flush (gdb_stdout);
gdb_flush (gdb_stderr);
if (gdb_notifier.num_fds == 0)
return -1;
+ if (use_poll)
+ {
#ifdef HAVE_POLL
- num_found =
- poll (gdb_notifier.poll_fds,
- (unsigned long) gdb_notifier.num_fds,
- gdb_notifier.timeout_valid ? gdb_notifier.timeout : -1);
-
- /* Don't print anything if we get out of poll because of a
- signal. */
- if (num_found == -1 && errno != EINTR)
- perror_with_name ("Poll");
-
-#else /* ! HAVE_POLL */
- memcpy (gdb_notifier.ready_masks,
- gdb_notifier.check_masks,
- 3 * MASK_SIZE * sizeof (fd_mask));
- num_found = select (gdb_notifier.num_fds,
- (SELECT_MASK *) & gdb_notifier.ready_masks[0],
- (SELECT_MASK *) & gdb_notifier.ready_masks[MASK_SIZE],
- (SELECT_MASK *) & gdb_notifier.ready_masks[2 * MASK_SIZE],
- gdb_notifier.timeout_valid ? &gdb_notifier.timeout : NULL);
-
- /* Clear the masks after an error from select. */
- if (num_found == -1)
+ num_found =
+ poll (gdb_notifier.poll_fds,
+ (unsigned long) gdb_notifier.num_fds,
+ gdb_notifier.timeout_valid ? gdb_notifier.poll_timeout : -1);
+
+ /* Don't print anything if we get out of poll because of a
+ signal. */
+ if (num_found == -1 && errno != EINTR)
+ perror_with_name (("poll"));
+#else
+ internal_error (__FILE__, __LINE__,
+ _("use_poll without HAVE_POLL"));
+#endif /* HAVE_POLL */
+ }
+ else
{
- memset (gdb_notifier.ready_masks,
- 0, 3 * MASK_SIZE * sizeof (fd_mask));
- /* Dont print anything is we got a signal, let gdb handle it. */
- if (errno != EINTR)
- perror_with_name ("Select");
+ gdb_notifier.ready_masks[0] = gdb_notifier.check_masks[0];
+ gdb_notifier.ready_masks[1] = gdb_notifier.check_masks[1];
+ gdb_notifier.ready_masks[2] = gdb_notifier.check_masks[2];
+ num_found = gdb_select (gdb_notifier.num_fds,
+ &gdb_notifier.ready_masks[0],
+ &gdb_notifier.ready_masks[1],
+ &gdb_notifier.ready_masks[2],
+ gdb_notifier.timeout_valid
+ ? &gdb_notifier.select_timeout : NULL);
+
+ /* Clear the masks after an error from select. */
+ if (num_found == -1)
+ {
+ FD_ZERO (&gdb_notifier.ready_masks[0]);
+ FD_ZERO (&gdb_notifier.ready_masks[1]);
+ FD_ZERO (&gdb_notifier.ready_masks[2]);
+ /* Dont print anything is we got a signal, let gdb handle it. */
+ if (errno != EINTR)
+ perror_with_name (("select"));
+ }
}
-#endif /* HAVE_POLL */
/* Enqueue all detected file events. */
+ if (use_poll)
+ {
#ifdef HAVE_POLL
+ for (i = 0; (i < gdb_notifier.num_fds) && (num_found > 0); i++)
+ {
+ if ((gdb_notifier.poll_fds + i)->revents)
+ num_found--;
+ else
+ continue;
- for (i = 0; (i < gdb_notifier.num_fds) && (num_found > 0); i++)
- {
- if ((gdb_notifier.poll_fds + i)->revents)
- num_found--;
- else
- continue;
+ for (file_ptr = gdb_notifier.first_file_handler;
+ file_ptr != NULL;
+ file_ptr = file_ptr->next_file)
+ {
+ if (file_ptr->fd == (gdb_notifier.poll_fds + i)->fd)
+ break;
+ }
+ if (file_ptr)
+ {
+ /* Enqueue an event only if this is still a new event for
+ this fd. */
+ if (file_ptr->ready_mask == 0)
+ {
+ file_event_ptr = create_file_event (file_ptr->fd);
+ async_queue_event (file_event_ptr, TAIL);
+ }
+ file_ptr->ready_mask = (gdb_notifier.poll_fds + i)->revents;
+ }
+ }
+#else
+ internal_error (__FILE__, __LINE__,
+ _("use_poll without HAVE_POLL"));
+#endif /* HAVE_POLL */
+ }
+ else
+ {
for (file_ptr = gdb_notifier.first_file_handler;
- file_ptr != NULL;
+ (file_ptr != NULL) && (num_found > 0);
file_ptr = file_ptr->next_file)
{
- if (file_ptr->fd == (gdb_notifier.poll_fds + i)->fd)
- break;
- }
+ int mask = 0;
+
+ if (FD_ISSET (file_ptr->fd, &gdb_notifier.ready_masks[0]))
+ mask |= GDB_READABLE;
+ if (FD_ISSET (file_ptr->fd, &gdb_notifier.ready_masks[1]))
+ mask |= GDB_WRITABLE;
+ if (FD_ISSET (file_ptr->fd, &gdb_notifier.ready_masks[2]))
+ mask |= GDB_EXCEPTION;
+
+ if (!mask)
+ continue;
+ else
+ num_found--;
- if (file_ptr)
- {
/* Enqueue an event only if this is still a new event for
this fd. */
+
if (file_ptr->ready_mask == 0)
{
file_event_ptr = create_file_event (file_ptr->fd);
async_queue_event (file_event_ptr, TAIL);
}
+ file_ptr->ready_mask = mask;
}
-
- file_ptr->ready_mask = (gdb_notifier.poll_fds + i)->revents;
- }
-
-#else /* ! HAVE_POLL */
- for (file_ptr = gdb_notifier.first_file_handler;
- (file_ptr != NULL) && (num_found > 0);
- file_ptr = file_ptr->next_file)
- {
- index = file_ptr->fd / (NBBY * sizeof (fd_mask));
- bit = 1 << (file_ptr->fd % (NBBY * sizeof (fd_mask)));
- mask = 0;
-
- if (gdb_notifier.ready_masks[index] & bit)
- mask |= GDB_READABLE;
- if ((gdb_notifier.ready_masks + MASK_SIZE)[index] & bit)
- mask |= GDB_WRITABLE;
- if ((gdb_notifier.ready_masks + 2 * (MASK_SIZE))[index] & bit)
- mask |= GDB_EXCEPTION;
-
- if (!mask)
- continue;
- else
- num_found--;
-
- /* Enqueue an event only if this is still a new event for
- this fd. */
-
- if (file_ptr->ready_mask == 0)
- {
- file_event_ptr = create_file_event (file_ptr->fd);
- async_queue_event (file_event_ptr, TAIL);
- }
- file_ptr->ready_mask = mask;
}
-#endif /* HAVE_POLL */
-
return 0;
}
\f
return async_handler_ptr;
}
+/* Call the handler from HANDLER immediately. This function runs
+ signal handlers when returning to the event loop would be too
+ slow. */
+void
+call_async_signal_handler (struct async_signal_handler *handler)
+{
+ (*handler->proc) (handler->client_data);
+}
+
/* Mark the handler (ASYNC_HANDLER_PTR) as ready. This information will
be used when the handlers are invoked, after we have waited for
some event. The caller of this function is the interrupt handler
else
{
prev_ptr = sighandler_list.first_handler;
- while (prev_ptr->next_handler != (*async_handler_ptr) && prev_ptr)
+ while (prev_ptr && prev_ptr->next_handler != (*async_handler_ptr))
prev_ptr = prev_ptr->next_handler;
prev_ptr->next_handler = (*async_handler_ptr)->next_handler;
if (sighandler_list.last_handler == (*async_handler_ptr))
sighandler_list.last_handler = prev_ptr;
}
- free ((char *) (*async_handler_ptr));
+ xfree ((*async_handler_ptr));
(*async_handler_ptr) = NULL;
}
;
prev_timer->next = timer_ptr->next;
}
- free ((char *) timer_ptr);
+ xfree (timer_ptr);
gdb_notifier.timeout_valid = 0;
}
saved_timer = timer_ptr;
timer_ptr = timer_ptr->next;
/* Call the procedure associated with that timer. */
- (*saved_timer->proc) (timer_ptr->client_data);
- free (saved_timer);
+ (*saved_timer->proc) (saved_timer->client_data);
+ xfree (saved_timer);
}
gdb_notifier.timeout_valid = 0;
}
/* Oops it expired already. Tell select / poll to return
- immediately. */
- if (delta.tv_sec < 0)
+ immediately. (Cannot simply test if delta.tv_sec is negative
+ because time_t might be unsigned.) */
+ if (timer_list.first_timer->when.tv_sec < time_now.tv_sec
+ || (timer_list.first_timer->when.tv_sec == time_now.tv_sec
+ && timer_list.first_timer->when.tv_usec < time_now.tv_usec))
{
delta.tv_sec = 0;
delta.tv_usec = 0;
/* Now we need to update the timeout for select/ poll, because we
don't want to sit there while this timer is expiring. */
+ if (use_poll)
+ {
#ifdef HAVE_POLL
- gdb_notifier.timeout = delta.tv_sec * 1000;
+ gdb_notifier.poll_timeout = delta.tv_sec * 1000;
#else
- gdb_notifier.timeout.tv_sec = delta.tv_sec;
- gdb_notifier.timeout.tv_usec = delta.tv_usec;
-#endif
+ internal_error (__FILE__, __LINE__,
+ _("use_poll without HAVE_POLL"));
+#endif /* HAVE_POLL */
+ }
+ else
+ {
+ gdb_notifier.select_timeout.tv_sec = delta.tv_sec;
+ gdb_notifier.select_timeout.tv_usec = delta.tv_usec;
+ }
gdb_notifier.timeout_valid = 1;
}
else
projects / deliverable / binutils-gdb.git / blobdiff